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Haldrup SH, Fabian-Jessing BK, Jakobsen TS, Lindholm AB, Adsersen RL, Aagaard L, Bek T, Askou AL, Corydon TJ. Subretinal AAV delivery of RNAi-therapeutics targeting VEGFA reduces choroidal neovascularization in a large animal model. Mol Ther Methods Clin Dev 2024; 32:101242. [PMID: 38605811 PMCID: PMC11007540 DOI: 10.1016/j.omtm.2024.101242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 03/21/2024] [Indexed: 04/13/2024]
Abstract
Neovascular age-related macular degeneration (nAMD) is a frequent cause of vision loss among the elderly in the Western world. Current disease management with repeated injections of anti-VEGF agents accumulates the risk for adverse events and constitutes a burden for society and the individual patient. Sustained suppression of VEGF using gene therapy is an attractive alternative, which we explored using adeno-associated virus (AAV)-based delivery of novel RNA interference (RNAi) effectors in a porcine model of choroidal neovascularization (CNV). The potency of VEGFA-targeting, Ago2-dependent short hairpin RNAs placed in pri-microRNA scaffolds (miR-agshRNA) was established in vitro and in vivo in mice. Subsequently, AAV serotype 8 (AAV2.8) vectors encoding VEGFA-targeting or irrelevant miR-agshRNAs under the control of a tissue-specific promotor were delivered to the porcine retina via subretinal injection before CNV induction by laser. Notably, VEGFA-targeting miR-agshRNAs resulted in a significant and sizable reduction of CNV compared with the non-targeting control. We also demonstrated that single-stranded and self-complementary AAV2.8 vectors efficiently transduce porcine retinal pigment epithelium cells but differ in their transduction characteristics and retinal safety. Collectively, our data demonstrated a robust anti-angiogenic effect of VEGFA-targeting miR-aghsRNAs in a large translational animal model, thereby suggesting AAV-based delivery of anti-VEGFA RNAi therapeutics as a valuable tool for the management of nAMD.
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Affiliation(s)
- Silja Hansen Haldrup
- Department of Biomedicine, Aarhus University, Høegh-Guldbergs Gade 10, 8000 Aarhus C, Denmark
| | - Bjørn K. Fabian-Jessing
- Department of Biomedicine, Aarhus University, Høegh-Guldbergs Gade 10, 8000 Aarhus C, Denmark
- Department of Ophthalmology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 167, 8200 Aarhus N, Denmark
| | - Thomas Stax Jakobsen
- Department of Biomedicine, Aarhus University, Høegh-Guldbergs Gade 10, 8000 Aarhus C, Denmark
- Department of Ophthalmology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 167, 8200 Aarhus N, Denmark
| | - Anna Bøgh Lindholm
- Department of Biomedicine, Aarhus University, Høegh-Guldbergs Gade 10, 8000 Aarhus C, Denmark
| | - Rikke L. Adsersen
- Department of Biomedicine, Aarhus University, Høegh-Guldbergs Gade 10, 8000 Aarhus C, Denmark
| | - Lars Aagaard
- Department of Biomedicine, Aarhus University, Høegh-Guldbergs Gade 10, 8000 Aarhus C, Denmark
| | - Toke Bek
- Department of Ophthalmology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 167, 8200 Aarhus N, Denmark
| | - Anne Louise Askou
- Department of Biomedicine, Aarhus University, Høegh-Guldbergs Gade 10, 8000 Aarhus C, Denmark
- Department of Ophthalmology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 167, 8200 Aarhus N, Denmark
| | - Thomas J. Corydon
- Department of Biomedicine, Aarhus University, Høegh-Guldbergs Gade 10, 8000 Aarhus C, Denmark
- Department of Ophthalmology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 167, 8200 Aarhus N, Denmark
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Mafla L, So RJ, Collins SL, Chan-Li Y, Lina I, Motz KM, Hillel AT. An Ovine Model Yields Histology and Gene Expression Changes Consistent with Laryngotracheal Stenosis. Laryngoscope 2024. [PMID: 38738796 DOI: 10.1002/lary.31499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 04/06/2024] [Accepted: 04/24/2024] [Indexed: 05/14/2024]
Abstract
OBJECTIVES Animal models for laryngotracheal stenosis (LTS) are critical to understand underlying mechanisms and study new therapies. Current animal models for LTS are limited by small airway sizes compared to human. The objective of this study was to develop and validate a novel, large animal ovine model for LTS. METHODS Sheep underwent either bleomycin-coated polypropylene brush injury to the subglottis (n = 6) or airway stent placement (n = 2) via suspension microlaryngoscopy. Laryngotracheal complexes were harvested 4 weeks following injury or stent placement. For the airway injury group, biopsies (n = 3 at each site) were collected of tracheal scar and distal normal regions, and analyzed for fibrotic gene expression. Lamina propria (LP) thickness was compared between injured and normal areas of trachea. RESULTS No mortality occurred in sheep undergoing airway injury or stent placement. There was no migration of tracheal stents. After protocol optimization, LP thickness was significantly increased in injured trachea (Sheep #3: 529.0 vs. 850.8 um; Sheep #4: 933.0 vs. 1693.2 um; Sheep #5: 743.7 vs. 1378.4 um; Sheep #6: 305.7 vs. 2257.6 um). A significant 62-fold, 20-fold, 16-fold, 16-fold, and 9-fold change of COL1, COL3, COL5, FN1, and TGFB1 was observed in injured scar specimen relative to unaffected airway, respectively. CONCLUSION An ovine LTS model produces histologic and transcriptional changes consistent with fibrosis seen in human LTS. Airway stent placement in this model is safe and feasible. This large airway model is a reliable and reproducible method to assess the efficacy of novel LTS therapies prior to clinical translation. LEVEL OF EVIDENCE N/A Laryngoscope, 2024.
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Affiliation(s)
- Laura Mafla
- Department of Otolaryngology - Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, U.S.A
| | - Raymond J So
- Department of Otolaryngology - Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, U.S.A
| | - Samuel L Collins
- Department of Otolaryngology - Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, U.S.A
| | - Yee Chan-Li
- Department of Otolaryngology - Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, U.S.A
| | - Ioan Lina
- Department of Otolaryngology - Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, U.S.A
| | - Kevin M Motz
- Department of Otolaryngology - Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, U.S.A
| | - Alexander T Hillel
- Department of Otolaryngology - Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, U.S.A
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Wiedmann F, Jamros M, Herlt V, Paasche A, Kraft M, Beck M, Prüser M, Erkal A, Harder M, Zaradzki M, Soethoff J, Karck M, Frey N, Schmidt C. A porcine large animal model of radiofrequency ablation-induced left bundle branch block. Front Physiol 2024; 15:1385277. [PMID: 38706948 PMCID: PMC11066324 DOI: 10.3389/fphys.2024.1385277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 03/27/2024] [Indexed: 05/07/2024] Open
Abstract
Background Electrocardiographic (ECG) features of left bundle branch (LBB) block (LBBB) can be observed in up to 20%-30% of patients suffering from heart failure with reduced ejection fraction. However, predicting which LBBB patients will benefit from cardiac resynchronization therapy (CRT) or conduction system pacing remains challenging. This study aimed to establish a translational model of LBBB to enhance our understanding of its pathophysiology and improve therapeutic approaches. Methods Fourteen male pigs underwent radiofrequency catheter ablation of the proximal LBB under fluoroscopy and ECG guidance. Comprehensive clinical assessments (12-lead ECG, bloodsampling, echocardiography, electroanatomical mapping) were conducted before LBBB induction, after 7, and 21 days. Three pigs received CRT pacemakers 7 days after LBB ablation to assess resynchronization feasibility. Results Following proximal LBB ablation, ECGs displayed characteristic LBBB features, including QRS widening, slurring in left lateral leads, and QRS axis changes. QRS duration increased from 64.2 ± 4.2 ms to 86.6 ± 12.1 ms, and R wave peak time in V6 extended from 21.3 ± 3.6 ms to 45.7 ± 12.6 ms. Echocardiography confirmed cardiac electromechanical dyssynchrony, with septal flash appearance, prolonged septal-to-posterior-wall motion delay, and extended ventricular electromechanical delays. Electroanatomical mapping revealed a left ventricular breakthrough site shift and significantly prolonged left ventricular activation times. RF-induced LBBB persisted for 3 weeks. CRT reduced QRS duration to 75.9 ± 8.6 ms, demonstrating successful resynchronization. Conclusion This porcine model accurately replicates the electrical and electromechanical characteristics of LBBB observed in patients. It provides a practical, cost-effective, and reproducible platform to investigate molecular and translational aspects of cardiac electromechanical dyssynchrony in a controlled and clinically relevant setting.
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Affiliation(s)
- Felix Wiedmann
- Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany
- HCR (Heidelberg Center for Heart Rhythm Disorders), University Hospital Heidelberg, Heidelberg, Germany
| | - Max Jamros
- Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Valerie Herlt
- Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Amelie Paasche
- Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Manuel Kraft
- Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Moritz Beck
- Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Merten Prüser
- Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany
- HCR (Heidelberg Center for Heart Rhythm Disorders), University Hospital Heidelberg, Heidelberg, Germany
| | - Atilla Erkal
- Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Maren Harder
- Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Marcin Zaradzki
- Department of Cardiac Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Jasmin Soethoff
- Department of Cardiac Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Matthias Karck
- Department of Cardiac Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Norbert Frey
- Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany
- HCR (Heidelberg Center for Heart Rhythm Disorders), University Hospital Heidelberg, Heidelberg, Germany
| | - Constanze Schmidt
- Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany
- HCR (Heidelberg Center for Heart Rhythm Disorders), University Hospital Heidelberg, Heidelberg, Germany
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Epperson RT, Isaacson BM, Rothberg DL, Olsen RE, Kawaguchi B, Rasmussen RM, Dickerson M, Pasquina PF, Shero J, Williams DL. Determining Which Combinatorial Combat-Relevant Factors Contribute to Heterotopic Ossification Formation in an Ovine Model. Bioengineering (Basel) 2024; 11:350. [PMID: 38671772 PMCID: PMC11048030 DOI: 10.3390/bioengineering11040350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/20/2024] [Accepted: 03/28/2024] [Indexed: 04/28/2024] Open
Abstract
Traumatic heterotopic ossification (HO) is frequently observed in Service Members following combat-related trauma. Estimates suggest that ~65% of wounded warriors who suffer limb loss or major extremity trauma will experience some type of HO formation. The development of HO delays rehabilitation and can prevent the use of a prosthetic. To date there are limited data to suggest a standard mechanism for preventing HO. This may be due to inadequate animal models not producing a similar bone structure as human HO. We recently showed that traumatic HO growth is possible in an ovine model. Within that study, we demonstrated that 65% of sheep developed a human-relevant hybrid traumatic HO bone structure after being exposed to a combination of seven combat-relevant factors. Although HO formed, we did not determine which traumatic factor contributed most. Therefore, in this study, we performed individual and various combinations of surgical/traumatic factors to determine their individual contribution to HO growth. Outcomes showed that the presence of mature biofilm stimulated a large region of bone growth, while bone trauma resulted in a localized bone response as indicated by jagged bone at the linea aspera. However, it was not until the combinatory factors were included that an HO structure similar to that of humans formed more readily in 60% of the sheep. In conclusion, data suggested that traumatic HO growth can develop following various traumatic factors, but a combination of known instigators yields higher frequency size and consistency of ectopic bone.
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Affiliation(s)
- Richard T. Epperson
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108, USA; (B.M.I.); (D.L.R.); (R.E.O.); (B.K.); (R.M.R.); (D.L.W.)
- Bone & Biofilm Research Laboratory, University of Utah, Salt Lake City, UT 84112, USA
| | - Brad M. Isaacson
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108, USA; (B.M.I.); (D.L.R.); (R.E.O.); (B.K.); (R.M.R.); (D.L.W.)
- The Center for Rehabilitation Sciences Research, Uniformed Services University, Bethesda, MD 20814, USA; (P.F.P.); (J.S.)
- The Geneva Foundation, Tacoma, WA 98402, USA
| | - David L. Rothberg
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108, USA; (B.M.I.); (D.L.R.); (R.E.O.); (B.K.); (R.M.R.); (D.L.W.)
| | - Raymond E. Olsen
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108, USA; (B.M.I.); (D.L.R.); (R.E.O.); (B.K.); (R.M.R.); (D.L.W.)
| | - Brooke Kawaguchi
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108, USA; (B.M.I.); (D.L.R.); (R.E.O.); (B.K.); (R.M.R.); (D.L.W.)
- Bone & Biofilm Research Laboratory, University of Utah, Salt Lake City, UT 84112, USA
| | - Ryan M. Rasmussen
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108, USA; (B.M.I.); (D.L.R.); (R.E.O.); (B.K.); (R.M.R.); (D.L.W.)
- Bone & Biofilm Research Laboratory, University of Utah, Salt Lake City, UT 84112, USA
| | - Mary Dickerson
- Office of Comparative Medicine, University of Utah, Salt Lake City, UT 84112, USA;
| | - Paul F. Pasquina
- The Center for Rehabilitation Sciences Research, Uniformed Services University, Bethesda, MD 20814, USA; (P.F.P.); (J.S.)
- Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20910, USA
| | - John Shero
- The Center for Rehabilitation Sciences Research, Uniformed Services University, Bethesda, MD 20814, USA; (P.F.P.); (J.S.)
- Extremity Trauma Center of Excellence, Joint Base San Antonio Fort Sam Houston, San Antonio, TX 78240, USA
| | - Dustin L. Williams
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108, USA; (B.M.I.); (D.L.R.); (R.E.O.); (B.K.); (R.M.R.); (D.L.W.)
- Bone & Biofilm Research Laboratory, University of Utah, Salt Lake City, UT 84112, USA
- The Center for Rehabilitation Sciences Research, Uniformed Services University, Bethesda, MD 20814, USA; (P.F.P.); (J.S.)
- Department of Pathology, University of Utah, Salt Lake City, UT 84112, USA
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, USA
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Giselvania A, Juniantito V, Wibowo H, Siregar TP, Gondhowiardjo S. Induction of Hepatocellular Carcinoma in Conventional Domestic Swine Using N-Diethylnitrosamine and Phenobarbital. Cancer Manag Res 2024; 16:245-257. [PMID: 38560662 PMCID: PMC10979671 DOI: 10.2147/cmar.s439787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 02/28/2024] [Indexed: 04/04/2024] Open
Abstract
Purpose Large animal models are still used in many studies because of their likeness to humans. It has not been documented that regular-sized conventional farm-breed pigs, generally bred for meat production, can be used to generate hepatocellular carcinoma (HCC) animal models. The goal of this study was to investigate how N-diethylnitrosamine (DENA) and phenobarbital (PB) together can generate HCC in ordinary farmed pigs. Materials and Methods Conventional domestic swine (Sus scrofa domesticus) were used. DENA 15 mg/kg was intraperitoneally injected weekly for 12 weeks, while PB tablets (4 mg/kg) were also administered through food for 16 weeks. Blood testing and ultrasonography evaluation were performed to monitor the progress. Subsequently, computed tomography was conducted in cases with suspected nodules, followed by histopathological examination to confirm the diagnosis. Results Ten swine (seven males, three females; age: 2 months; weight: 9-15 kg) were included in the study and followed up for 25 months; nine were experimental, and one was control for ethical considerations. The maximum weight of animals during this study reached 162-228 kg. The weight gain seen in the intervention swine was predominantly lower than that documented in the control. The laboratory analysis revealed no notable abnormalities in liver function markers but did demonstrate statistically significant changes in urea (p = 0.028) and creatinine (p = 0.003) levels. Ultrasonography and computed tomography showed multiple liver nodules with characteristics resembling HCC. Serial imaging screening and more extended observations revealed that all animals eventually developed tumors. Histopathological confirmation at 15-22 weeks post-induction revealed that all intervened swine developed multiple nodules of well-differentiated HCC and some with hepatic angiosarcoma. Conclusion This study successfully generated HCC in conventional domestic swine with a DENA and PB combination. This investigation required at least 15 months to develop tumors. This model will be beneficial for future investigations of HCC in large animals.
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Affiliation(s)
- Angela Giselvania
- Doctoral Program in Biomedical Sciences, Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia
- Department of Radiation Oncology, Faculty of Medicine Universitas Indonesia, Dr Cipto Mangunkusumo Hospital, Jakarta, Indonesia
| | - Vetnizah Juniantito
- Division of Pathology, School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor, Indonesia
| | - Heri Wibowo
- Department of Parasitology, Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia
| | - Trifonia Pingkan Siregar
- Department of Radiology, Faculty of Medicine Universitas Indonesia, Dr Cipto Mangunkusumo Hospital, Jakarta, Indonesia
| | - Soehartati Gondhowiardjo
- Department of Radiation Oncology, Faculty of Medicine Universitas Indonesia, Dr Cipto Mangunkusumo Hospital, Jakarta, Indonesia
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Stærk K, Schrøder B, Jensen LK, Petersen T, Andersen TE, Nielsen LF. Catheter-associated bladder mucosal trauma during intermittent voiding: An experimental study in pigs. BJUI Compass 2024; 5:217-223. [PMID: 38371199 PMCID: PMC10869658 DOI: 10.1002/bco2.295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/23/2023] [Accepted: 09/09/2023] [Indexed: 02/20/2024] Open
Abstract
Objective The objective of this study is to characterize bladder mucosal trauma associated with intermittent catheterization with conventional eyelet catheters (CECs) and to assess if a microhole zone catheter (MHZC) design concept reduces this adverse effect. Materials and Methods A porcine model was developed to reflect human catheterization and bladder drainage. Nine pigs were randomized for catheterization with CEC (n = 6) or MHZC (n = 3). The bladder was drained repeatedly 20 times through the catheter. Cystoscopy was performed before and after the procedure, and bladders were analysed by histopathology. Two additional pigs were used for cystoscopy visualization of suction events in vivo. Cystoscopy, gross pathology, histopathological score, leucocyte infiltration, and intracatheter pressure at flow stops during voiding were compared for each group. Results A significant higher pressure gradient was measured inside the CECs compared with MHZCs during flow stop. Consequently, CECs resulted in suction events inflicting bladder trauma characterized by loss of epithelium, oedema, haemorrhage, and neutrophil tissue infiltration. No significant trauma was identified when using MHZC. Conclusions Considerable mucosal bladder trauma is inflicted by CECs which may be an overlooked risk factor for urinary tract infection. Catheters can be designed to minimize mucosal suction and reduce associated trauma. This may be a solution to reduce infection frequency and increase user comfort. Furthermore, the study demonstrates the potential of pigs as an attractive animal model for investigating urinary catheter performances.
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Affiliation(s)
- Kristian Stærk
- Department of Clinical Research University of Southern Denmark Odense Denmark
- Department of Clinical Microbiology Odense University Hospital Odense Denmark
| | - Brit Schrøder
- Preclinical, R&D, Innovation Coloplast A/S Humlebaek Denmark
| | | | - Troels Petersen
- Preclinical, R&D, Innovation Coloplast A/S Humlebaek Denmark
| | - Thomas Emil Andersen
- Department of Clinical Research University of Southern Denmark Odense Denmark
- Department of Clinical Microbiology Odense University Hospital Odense Denmark
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Roberts SH, Zaghloul MS, Ismail U, Rowe RA, Engel C, Meade R, Elizondo-Benedetto S, Genin GM, Zayed MA. In Vivo Porcine Model of Acute Iliocaval Deep Vein Thrombosis. J Endovasc Ther 2024:15266028241231513. [PMID: 38357736 DOI: 10.1177/15266028241231513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
CLINICAL IMPACT The study establishes a rapid, technically straightforward, and reproducible porcine large animal model for acute iliocaval deep vein thrombosis (DVT). The procedure can be performed with basic endovascular skillsets. With its procedural efficiency and consistency, the platform is promising for comparative in vivo testing of venous thrombectomy devices in a living host, and for future verification and validation studies to determine efficacy of novel thrombectomy devices relative to predicates.
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Affiliation(s)
- Sophia H Roberts
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Mohamed S Zaghloul
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | | | | | - Connor Engel
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Rodrigo Meade
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Santiago Elizondo-Benedetto
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Guy M Genin
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Caeli Vascular, Inc., St. Louis, MO, USA
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University in St. Louis, St. Louis, MO, USA
- NSF Science and Technology Center for Engineering Mechanobiology, McKelvey School of Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Mohamed A Zayed
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Caeli Vascular, Inc., St. Louis, MO, USA
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University in St. Louis, St. Louis, MO, USA
- Division of Molecular Cell Biology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Department of Radiology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
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Felgendreff P, Lawrence JM, Hosseiniasl SM, Jacobs JF, Amiot BP, Felgendreff L, Minshew A, Sultan A, Ahmadzada B, Rahe MC, Nyberg SL. Clinical characterization of a hypersensitivity mixed bacterial and fungal dermatitis in a translational model of porcine NASH. Front Cell Infect Microbiol 2024; 13:1277045. [PMID: 38327680 PMCID: PMC10847572 DOI: 10.3389/fcimb.2023.1277045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 12/28/2023] [Indexed: 02/09/2024] Open
Abstract
Introduction The development of animal models of chronic liver disease via diet modification is a promising avenue for translational research but can lead to unexpected side effects that impact model adoption. While these side effects are well characterized in rodent models of nonalcoholic steatohepatitis (NASH), limited knowledge of these effects exists for novel porcine models of NASH. To close this gap, the present study investigates the side effects of diet-based NASH induction in pigs, with a systematic analysis of the pathologic mechanisms underlying dermatitis development and evaluation of treatment approaches. Method Twelve pigs (10 large domestic pigs, 2 Goettingen minipigs) were fed a methionine- and choline-deficient, high-fat diet for 8 weeks to induce NASH. A retrospective review of each animal's clinical record was performed to identify the side effects of the diet. Following the identification of diet-associated dermatitis, severity was judged by using a novel gradation system that characterized the individual lesions and body regions resulting in a cumulative evaluation. In addition to this clinical assessment, the etiology of the dermatitis was investigated via histopathologic and microbiologic testing. Furthermore, the success of prophylactic and therapeutic treatment approaches was evaluated by considering dermatitis development and clinical course. Results All study animals demonstrated unexpected side effects of the methionine- and choline-deficient, high fat diet. In addition to marked dermatitis, study pigs showed impaired weight gain and developed steatorrhea and anemia. Based on the skin gradation system, five animals developed severe dermatitis, four animals moderate dermatitis, and three animals mild diet-associated dermatitis. Histological and microbiological evaluation of the affected skin showed signs of a hypersensitivity reaction with secondary infection by bacteria and fungi. The analysis showed that preemptive bathing extended the lesion-free duration by nearly 20 days. Furthermore, bathing in combination with a targeted antibiotic treatment represented a helpful treatment approach for diet-associated dermatitis. Conclusion The provision of a methionine- and choline-deficient, high fat diet represents an effective approach for inducing NASH liver disease in pigs but predisposes study animals to multiple side effects. These side effects are universal to animals on study but can be adequately managed and do not represent a significant limitation of this model.
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Affiliation(s)
- Philipp Felgendreff
- Department of Surgery, Mayo Clinic, Rochester, MN, United States
- Department of General, Visceral, and Transplantation Surgery, Hannover Medical School, Hannover, Germany
| | | | | | - Julie F. Jacobs
- Department of Comparative Medicine, Mayo Clinic, Rochester, MN, United States
| | - Bruce P. Amiot
- Department of Surgery, Mayo Clinic, Rochester, MN, United States
| | - Lisa Felgendreff
- Center for Empirical Research in Economics and Behavioral Sciences, Media and Communication Science, University of Erfurt, Erfurt, Germany
| | - Anna Minshew
- Department of Surgery, Mayo Clinic, Rochester, MN, United States
| | - Ahmer Sultan
- Department of Surgery, Mayo Clinic, Rochester, MN, United States
| | | | - Michael C. Rahe
- Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, United States
- Population Health and Pathobiology, North Carolina State University, Raleigh, NC, United States
| | - Scott L. Nyberg
- Department of Surgery, Mayo Clinic, Rochester, MN, United States
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN, United States
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9
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Vergara-Hernandez FB, Nielsen BD, Panek CL, Robison CI, Colbath AC. Exercising sheep as a preclinical model for musculoskeletal research. Am J Vet Res 2023:1-8. [PMID: 38113645 DOI: 10.2460/ajvr.23.09.0209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 12/06/2023] [Indexed: 12/21/2023]
Abstract
OBJECTIVE To establish an orthopedic, preclinical, ovine model of controlled exercise using an equine walker. ANIMALS 20 Dorset-Polypay sheep. PROCEDURES Sheep underwent 11 weeks of exercise, 4 days per week. Exercise duration and intensity increased until sheep performed 25 minutes at 1.3 m/s and 5 min at 2.0 m/s. Physical/lameness examinations were conducted every 14 days. Blood was collected every 28 days for analysis of serum bone biomarkers (SBB): bone alkaline phosphatase (BALP), procollagen type I amino-terminal propeptide (PINP), carboxy-telopeptide of type I collagen cross-links (CTX-I), tartrate-resistant acid phosphatase 5b (TRAP5b), and receptor activator of nuclear factor-kβ ligand (RANKL). RESULTS Sheep adapted easily to group exercise. Animals grew taller (P = .006) but had a 4% weight loss (P = .003). RANKL was reduced on days 28 and 84 compared to day 56 (P < .05), CTX-1 was reduced on days 28 and 84 compared to days 0 and 56 (P < .05), and TRAP5b was greater on day 28 compared to day 0 (P = .009). BALP and PINP did not change. CLINICAL RELEVANCE The described preclinical model of exercising sheep has distinct advantages including ease of handling, an established lameness scale, commercially available ovine SBB assays, and the ability to alter footing characteristics and complete circular exercise. Decreasing CTX-I and RANKL with no change in BALP and PINP suggests reduced bone resorption over the study period. Future studies may include a sedentary group or utilize adult animals to alleviate any influence of growth on SBB.
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Affiliation(s)
- Fernando B Vergara-Hernandez
- Department of Animal Science, College of Agriculture and Natural Resources, Michigan State University, East Lansing, Michigan
| | - Brian D Nielsen
- Department of Animal Science, College of Agriculture and Natural Resources, Michigan State University, East Lansing, Michigan
| | - Char L Panek
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York
| | - Cara I Robison
- Department of Animal Science, College of Agriculture and Natural Resources, Michigan State University, East Lansing, Michigan
| | - Aimee C Colbath
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York
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10
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Benatti HR, Prestigiacomo RD, Taghian T, Miller R, King R, Gounis MJ, Celik U, Bertrand S, Tuominen S, Bierfeldt L, Parsley E, Gallagher J, Hall EF, McElroy AW, Sena-Esteves M, Khvorova A, Aronin N, Gray-Edwards HL. Awake intracerebroventricular delivery and safety assessment of oligonucleotides in a large animal model. Mol Ther Methods Clin Dev 2023; 31:101122. [PMID: 37920238 PMCID: PMC10618110 DOI: 10.1016/j.omtm.2023.101122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 09/23/2023] [Indexed: 11/04/2023]
Abstract
Oligonucleotide therapeutics offer great promise in the treatment of previously untreatable neurodegenerative disorders; however, there are some challenges to overcome in pre-clinical studies. (1) They carry a well-established dose-related acute neurotoxicity at the time of administration. (2) Repeated administration into the cerebrospinal fluid may be required for long-term therapeutic effect. Modifying oligonucleotide formulation has been postulated to prevent acute toxicity, but a sensitive and quantitative way to track seizure activity in pre-clinical studies is lacking. The use of intracerebroventricular (i.c.v.) catheters offers a solution for repeated dosing; however, fixation techniques in large animal models are not standardized and are not reliable. Here we describe a novel surgical technique in a sheep model for i.c.v. delivery of neurotherapeutics based on the fixation of the i.c.v. catheter with a 3D-printed anchorage system composed of plastic and ceramic parts, compatible with magnetic resonance imaging, computed tomography, and electroencephalography (EEG). Our technique allowed tracking electrical brain activity in awake animals via EEG and video recording during and for the 24-h period after administration of a novel oligonucleotide in sheep. Its anchoring efficiency was demonstrated for at least 2 months and will be tested for up to a year in ongoing studies.
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Affiliation(s)
- Hector Ribeiro Benatti
- Horae Gene Therapy Center, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
| | - Rachel D. Prestigiacomo
- Horae Gene Therapy Center, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
| | - Toloo Taghian
- Horae Gene Therapy Center, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
- Department of Radiology, UMass Chan Medical School, 55 N Lake Ave, Worcester, MA 01655, USA
| | - Rachael Miller
- Department of Endocrinology, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
- RNA Therapeutic Institute, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
| | - Robert King
- Department of Radiology, UMass Chan Medical School, 55 N Lake Ave, Worcester, MA 01655, USA
| | - Matthew J. Gounis
- Department of Radiology, UMass Chan Medical School, 55 N Lake Ave, Worcester, MA 01655, USA
| | - Ugur Celik
- Center for Clinical Research, UMass Chan Medical School, 55 N Lake Ave, Worcester MA 01655, USA
| | - Stephanie Bertrand
- Cummings School of Veterinary Medicine, Tufts University, Grafton MA 01536, USA
| | - Susan Tuominen
- Department of Animal Medicine, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
| | - Lindsey Bierfeldt
- Department of Animal Medicine, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
| | - Elizabeth Parsley
- Cummings School of Veterinary Medicine, Tufts University, Grafton MA 01536, USA
| | - Jillian Gallagher
- Horae Gene Therapy Center, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
| | - Erin F. Hall
- Horae Gene Therapy Center, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
| | - Abigail W. McElroy
- Horae Gene Therapy Center, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
| | - Miguel Sena-Esteves
- Horae Gene Therapy Center, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
- Department of Neurology, UMass Chan Medical School, 368 Plantation Street, Worcester MA 01605, USA
| | - Anastasia Khvorova
- RNA Therapeutic Institute, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
| | - Neil Aronin
- Department of Endocrinology, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
- RNA Therapeutic Institute, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
| | - Heather L. Gray-Edwards
- Horae Gene Therapy Center, UMass Chan Medical School, 368 Plantation Street, Worcester, MA 01605, USA
- Department of Radiology, UMass Chan Medical School, 55 N Lake Ave, Worcester, MA 01655, USA
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11
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Onohara D, Hagen M, Louey S, Giraud G, Jonker S, Padala M. Chronic in utero mitral inflow obstruction unloads left ventricular volume in a novel late gestation fetal lamb model. JTCVS Open 2023; 16:698-707. [PMID: 38204723 PMCID: PMC10775114 DOI: 10.1016/j.xjon.2023.09.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 09/26/2023] [Accepted: 09/28/2023] [Indexed: 01/12/2024]
Abstract
Objective The in utero no flow/no grow hypothesis postulates that reduced inflow of blood into the left ventricle due to a stenotic mitral valve could lead to ventricular hypoplasia and hypoplastic left heart syndrome. This has been demonstrated in chick embryos, but less so in large animals. We investigated the impact of mitral obstruction on left and right ventricular growth in fetal lambs. Methods Twelve pregnant ewes, most bearing twins, were instrumented at 119 ± 1 days gestational age. Carotid artery and jugular vein catheters, an ascending aorta flow probe, and a left atrial deflated balloon catheter were implanted into 1 fetus (left atrial balloon group), and the twin remained an uninstrumented control. The balloon was inflated gradually over 8 days until net antegrade aortic flow was eliminated. Fetal transesophageal echocardiography was performed at the time of surgery and just before termination in both groups. Results Terminal fetal body weights were comparable between groups. Terminal heart/body weight ratio was higher in left atrial balloon group fetuses (6.9 ± 0.8 g/kg) compared with controls (5.9 ± 0.6 g, P = .0126). The left ventricular/right ventricular weight ratio was 24% (P = .0077) lower in left atrial balloon group fetuses than in controls. Left ventricular/heart weight (0.24 ± 0.04 g/g vs 0.30 ± 0.04 g/g, P = .0009), left ventricular end-diastolic volume (2.3 ± 0.7 mL vs 7.1 ± 0.8 mL; P = .0012), and left ventricular end-systolic volume (1.01 mL [0.95-1.95 mL] vs 3.38 mL [3.28-3.57 mL], P = .0042) were lower in left atrial balloon group fetuses compared with controls. Right ventricular weight (g/kg), right ventricular end-diastolic volume, and right ventricular end-systolic volume were similar between groups. Conclusions In this late-gestation fetal lamb model, in utero obstruction of mitral inflow slowed left ventricular growth and caused right ventricular remodeling.
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Affiliation(s)
- Daisuke Onohara
- Structural Heart Research and Innovation Laboratory, Carlyle Fraser Heart Center at Emory University Hospital Midtown, Atlanta, Ga
- Division of Cardiothoracic Surgery, Department of Surgery, Emory University School of Medicine, Atlanta, Ga
| | - Matthew Hagen
- Center for Development Health, Knight Cardiovascular Institute, Oregon Health & Science University, Portland, Ore
| | - Samantha Louey
- Center for Development Health, Knight Cardiovascular Institute, Oregon Health & Science University, Portland, Ore
| | - George Giraud
- Center for Development Health, Knight Cardiovascular Institute, Oregon Health & Science University, Portland, Ore
- Department of Cardiology, Portland Veterans Affairs Medical Center, Portland, Ore
| | - Sonnet Jonker
- Center for Development Health, Knight Cardiovascular Institute, Oregon Health & Science University, Portland, Ore
| | - Muralidhar Padala
- Structural Heart Research and Innovation Laboratory, Carlyle Fraser Heart Center at Emory University Hospital Midtown, Atlanta, Ga
- Division of Cardiothoracic Surgery, Department of Surgery, Emory University School of Medicine, Atlanta, Ga
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12
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Koga M, Kim B, Lintz M, Kirnaz S, Goldberg JL, Hussain I, Medary B, Meyers KN, Maher SA, Härtl R, Bonassar LJ. Finite element modeling to predict the influence of anatomic variation and implant placement on performance of biological intervertebral disc implants. JOR Spine 2023; 6:e1307. [PMID: 38156058 PMCID: PMC10751973 DOI: 10.1002/jsp2.1307] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 11/07/2023] [Accepted: 11/10/2023] [Indexed: 12/30/2023] Open
Abstract
Background Tissue-engineered intervertebral disc (TE-IVD) constructs are an attractive therapy for treating degenerative disc disease and have previously been investigated in vivo in both large and small animal models. The mechanical environment of the spine is notably challenging, in part due to its complex anatomy, and implants may require additional mechanical support to avoid failure in the early stages of implantation. As such, the design of suitable support implants requires rigorous validation. Methods We created a FE model to simulate the behavior of the IVD cages under compression specific to the anatomy of the porcine cervical spine, validated the FE model using an animal model, and predicted the effects of implant location and vertebral angle of the motion segment on implant behavior. Specifically, we tested anatomical positioning of the superior vertebra and placement of the implant. We analyzed corresponding stress and strain distributions. Results Results demonstrated that the anatomical geometry of the porcine cervical spine led to concentrated stress and strain on the posterior side of the cage. This stress concentration was associated with the location of failure of the cages reported in vivo, despite superior mechanical properties of the implant. Furthermore, placement of the cage was found to have profound effects on migration, while the angle of the superior vertebra affected stress concentration of the cage. Conclusions This model can be utilized both to inform surgical procedures and provide insight on future cage designs and can be adopted to models without the use of in vivo animal models.
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Affiliation(s)
- Maho Koga
- Meinig School of Biomedical EngineeringCornell UniversityIthacaNew YorkUSA
| | - Byumsu Kim
- Sibley School of Mechanical and Aerospace EngineeringCornell UniversityIthacaNew YorkUSA
| | - Marianne Lintz
- Meinig School of Biomedical EngineeringCornell UniversityIthacaNew YorkUSA
| | | | | | | | | | | | | | | | - Lawrence J. Bonassar
- Meinig School of Biomedical EngineeringCornell UniversityIthacaNew YorkUSA
- Sibley School of Mechanical and Aerospace EngineeringCornell UniversityIthacaNew YorkUSA
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13
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Wang M, Lu X, Han L, Wang AM, Raju S, Kassab GS. Novel venous balloon for compliance measurement and stent sizing in a post-thrombotic swine model. Front Bioeng Biotechnol 2023; 11:1298621. [PMID: 38076433 PMCID: PMC10702604 DOI: 10.3389/fbioe.2023.1298621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 11/01/2023] [Indexed: 02/12/2024] Open
Abstract
Objective: Real-time accurate venous lesion characterization is needed during endovenous interventions for stent deployment. The goal of this study is to validate a novel device for venoplasty sizing and compliance measurements. Methods: A compliance measuring sizing balloon (CMSB) uses real-time electrical conductance measurements based on Ohm's Law to measure the venous size and compliance in conjunction with pressure measurement. The sizing accuracy and repeatability of the CMSB system were performed with phantoms on the bench and in a swine model with an induced post thrombotic (PT) stenosis in the common femoral vein of swine. Results: The accuracy and repeatability of the CMSB system were validated with phantom bench studies of known dimensions in the range of venous diameters. In 9 swine (6 experimental and 3 control animals), the luminal cross-sectional areas (CSA) increased heterogeneously along the PT stenosis when the CMSB system was inflated by stepwise pressures. The PT stenosis showed lower compliance compared to the non-PT vein segments (5 mm2 vs. 10 mm2 and 13 mm2 at a pressure change of 40 cm H2O). Compliance had no statistical difference between venous hypertension (VHT) and Control. Compliance at PT stenosis, however, was significantly smaller than that at Control and VHT (p < 0.05, ANOVA). Conclusion: The CMSB system provides accurate, repeatable, real-time measurements of CSA and compliance for assessment of venous lesions to guide interventions. These findings provide the impetus for future first-in-human studies.
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Affiliation(s)
| | - Xiao Lu
- California Medical Innovations Institute, San Diego, CA, United States
| | - Ling Han
- California Medical Innovations Institute, San Diego, CA, United States
| | - Amy M. Wang
- 3DT Holdings LLC, San Diego, CA, United States
| | - Seshadri Raju
- The Rane Center at St. Dominic’s Hospital, Jackson, MS, United States
| | - Ghassan S. Kassab
- California Medical Innovations Institute, San Diego, CA, United States
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14
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Rivas VN, Kaplan JL, Kennedy SA, Fitzgerald S, Crofton AE, Farrell A, Grubb L, Jauregui CE, Grigorean G, Choi E, Harris SP, Stern JA. Multi-Omic, Histopathologic, and Clinicopathologic Effects of Once-Weekly Oral Rapamycin in a Naturally Occurring Feline Model of Hypertrophic Cardiomyopathy: A Pilot Study. Animals (Basel) 2023; 13:3184. [PMID: 37893908 PMCID: PMC10603660 DOI: 10.3390/ani13203184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/09/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Hypertrophic cardiomyopathy (HCM) remains the single most common cardiomyopathy in cats, with a staggering prevalence as high as 15%. To date, little to no direct therapeutical intervention for HCM exists for veterinary patients. A previous study aimed to evaluate the effects of delayed-release (DR) rapamycin dosing in a client-owned population of subclinical, non-obstructive, HCM-affected cats and reported that the drug was well tolerated and resulted in beneficial LV remodeling. However, the precise effects of rapamycin in the hypertrophied myocardium remain unknown. Using a feline research colony with naturally occurring hereditary HCM (n = 9), we embarked on the first-ever pilot study to examine the tissue-, urine-, and plasma-level proteomic and tissue-level transcriptomic effects of an intermittent low dose (0.15 mg/kg) and high dose (0.30 mg/kg) of DR oral rapamycin once weekly. Rapamycin remained safe and well tolerated in cats receiving both doses for eight weeks. Following repeated weekly dosing, transcriptomic differences between the low- and high-dose groups support dose-responsive suppressive effects on myocardial hypertrophy and stimulatory effects on autophagy. Differences in the myocardial proteome between treated and control cats suggest potential anti-coagulant/-thrombotic, cellular remodeling, and metabolic effects of the drug. The results of this study closely recapitulate what is observed in the human literature, and the use of rapamycin in the clinical setting as the first therapeutic agent with disease-modifying effects on HCM remains promising. The results of this study establish the need for future validation efforts that investigate the fine-scale relationship between rapamycin treatment and the most compelling gene expression and protein abundance differences reported here.
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Affiliation(s)
- Victor N. Rivas
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616, USA
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607, USA
| | - Joanna L. Kaplan
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616, USA
| | | | | | - Amanda E. Crofton
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616, USA
| | | | | | - Carina E. Jauregui
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616, USA
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607, USA
| | - Gabriela Grigorean
- Proteomics Core Facility, University of California-Davis, Davis, CA 95616, USA
| | - Eunju Choi
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616, USA;
| | - Samantha P. Harris
- Department of Physiology, College of Medicine-Tucson, University of Arizona, Tucson, AZ 85724, USA
| | - Joshua A. Stern
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616, USA
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607, USA
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15
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Gao L, Beninatto R, Oláh T, Goebel L, Tao K, Roels R, Schrenker S, Glomm J, Venkatesan JK, Schmitt G, Sahin E, Dahhan O, Pavan M, Barbera C, Lucia AD, Menger MD, Laschke MW, Cucchiarini M, Galesso D, Madry H. A Photopolymerizable Biocompatible Hyaluronic Acid Hydrogel Promotes Early Articular Cartilage Repair in a Minipig Model In Vivo. Adv Healthc Mater 2023; 12:e2300931. [PMID: 37567219 DOI: 10.1002/adhm.202300931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 08/08/2023] [Indexed: 08/13/2023]
Abstract
Articular cartilage defects represent an unsolved clinical challenge. Photopolymerizable hydrogels are attractive candidates supporting repair. This study investigates the short-term safety and efficacy of two novel hyaluronic acid (HA)-triethylene glycol (TEG)-coumarin hydrogels photocrosslinked in situ in a clinically relevant large animal model. It is hypothesized that HA-hydrogel-augmented microfracture (MFX) is superior to MFX in enhancing early cartilage repair, and that the molar degree of substitution and concentration of HA affects repair. Chondral full-thickness defects in the knees of adult minipigs are treated with either 1) debridement (No MFX), 2) debridement and MFX, 3) debridement, MFX, and HA hydrogel (30% molar derivatization, 30 mg mL-1 HA; F3) (MFX+F3), and 4) debridement, MFX, and HA hydrogel (40% molar derivatization, 20 mg mL-1 HA; F4) (MFX+F4). After 8 weeks postoperatively, MFX+F3 significantly improves total macroscopic and histological scores compared with all other groups without negative effects, besides significantly enhancing the individual repair parameters "defect architecture," "repair tissue surface" (compared with No MFX, MFX), and "subchondral bone" (compared with MFX). These data indicate that photopolymerizable HA hydrogels enable a favorable metastable microenvironment promoting early chondrogenesis in vivo. This work also uncovers a mechanism for effective HA-augmented cartilage repair by combining lower molar derivatization with higher concentrations.
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Affiliation(s)
- Liang Gao
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Riccardo Beninatto
- Fidia Farmaceutici S.p.A., Via Ponte della Fabbrica 3/A, Abano Terme (PD), 35031, Italy
| | - Tamás Oláh
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Lars Goebel
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Ke Tao
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Rebecca Roels
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Steffen Schrenker
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Julianne Glomm
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Jagadeesh K Venkatesan
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Gertrud Schmitt
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Ebrar Sahin
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Ola Dahhan
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Mauro Pavan
- Fidia Farmaceutici S.p.A., Via Ponte della Fabbrica 3/A, Abano Terme (PD), 35031, Italy
| | - Carlo Barbera
- Fidia Farmaceutici S.p.A., Via Ponte della Fabbrica 3/A, Abano Terme (PD), 35031, Italy
| | - Alba Di Lucia
- Fidia Farmaceutici S.p.A., Via Ponte della Fabbrica 3/A, Abano Terme (PD), 35031, Italy
| | - Michael D Menger
- Institute for Clinical and Experimental Surgery, Saarland University, Kirrberger Straße 100, Building 65 and 66, D-66421, Homburg, Germany
| | - Matthias W Laschke
- Institute for Clinical and Experimental Surgery, Saarland University, Kirrberger Straße 100, Building 65 and 66, D-66421, Homburg, Germany
| | - Magali Cucchiarini
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
| | - Devis Galesso
- Fidia Farmaceutici S.p.A., Via Ponte della Fabbrica 3/A, Abano Terme (PD), 35031, Italy
| | - Henning Madry
- Center of Experimental Orthopaedics, Saarland University, Kirrberger Straße 100, Building 37, D-66421, Homburg, Germany
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16
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Haugsten Hansen M, Sadredini M, Hasic A, Eriksen M, Stokke MK. Myocardial oxidative stress is increased in early reperfusion, but systemic antioxidative therapy does not prevent ischemia-reperfusion arrhythmias in pigs. Front Cardiovasc Med 2023; 10:1223496. [PMID: 37823177 PMCID: PMC10562584 DOI: 10.3389/fcvm.2023.1223496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 09/14/2023] [Indexed: 10/13/2023] Open
Abstract
Background Arrhythmias in the early phase of reperfusion after myocardial infarction (MI) are common, and can lead to hemodynamic instability or even cardiac arrest. Reactive oxygen species (ROS) are thought to play a key role in the underlying mechanisms, but evidence from large animal models is scarce, and effects of systemic antioxidative treatment remain contentious. Methods MI was induced in 7 male and 7 female pigs (Norwegian landrace, 35-40 kg) by clamping of the left anterior descending artery (LAD) during open thorax surgery. Ischemia was maintained for 90 min, before observation for 1 h after reperfusion. Pigs were randomized 1:1 in an operator-blinded fashion to receive either i.v. N-acetylcysteine (NAC) from 70 min of ischemia and onwards, or 0.9% NaCl as a control. Blood samples and tissue biopsies were collected at baseline, 60 min of ischemia, and 5 and 60 min of reperfusion. ECG and invasive blood pressure were monitored throughout. Results The protocol was completed in 11 pigs. Oxidative stress, as indicated by immunoblotting for Malondialdehyde in myocardial biopsies, was increased at 5 min of reperfusion compared to baseline, but not at 60 min of reperfusion, and not reduced with NAC. We found no significant differences in circulating biomarkers of myocardial necrosis, nor in the incidence of idioventricular rhythm (IVR), non-sustained ventricular tachycardia (NSVT), ventricular tachycardia (VT) or ventricular fibrillation (VF) between NAC-treated and control pigs during reperfusion. Conclusion Myocardial oxidation was increased early after reperfusion in a porcine model of MI, but systemic antioxidative treatment did not protect against reperfusion arrhythmias.
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Affiliation(s)
- Marie Haugsten Hansen
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- KG Jebsen Centre for Cardiac Research, University of Oslo, Oslo, Norway
| | - Mani Sadredini
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- KG Jebsen Centre for Cardiac Research, University of Oslo, Oslo, Norway
| | - Almira Hasic
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- KG Jebsen Centre for Cardiac Research, University of Oslo, Oslo, Norway
| | - Morten Eriksen
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- KG Jebsen Centre for Cardiac Research, University of Oslo, Oslo, Norway
| | - Mathis Korseberg Stokke
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- KG Jebsen Centre for Cardiac Research, University of Oslo, Oslo, Norway
- Department of Cardiology, Oslo University Hospital Rikshospitalet, Oslo, Norway
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Kaiser F, Schröter L, Wohlfahrt P, Geroneit I, Murek J, Stahlhut P, Weichhold J, Ignatius A, Gbureck U. Exploring the potential of magnesium oxychloride, an amorphous magnesium phosphate, and newberyite as possible bone cement candidates. J Biomater Appl 2023; 38:438-454. [PMID: 37525613 PMCID: PMC10494481 DOI: 10.1177/08853282231190908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Magnesium phosphate-based bone cements, particularly struvite (MgNH4PO4∙6H2O)-forming cements, have attracted increased scientific interest in recent years because they exhibit similar biocompatibility to hydroxyapatite while degrading much more rapidly in vivo. However, other magnesium-based minerals which might be promising are, to date, little studied. Therefore, in this study, we investigated three magnesium-based bone cements: a magnesium oxychloride cement (Mg3(OH)5Cl∙4H2O), an amorphous magnesium phosphate cement based on Mg3(PO4)2, MgO, and NaH2PO4, and a newberyite cement (MgHPO4·3H2O). Because it is not sufficiently clear from the literature to what extent these cements are suitable for clinical use, all of them were characterized and optimized regarding setting time, setting temperature, compressive strength and passive degradation in phosphate-buffered saline. Because the in vitro properties of the newberyite cement were most promising, it was orthotopically implanted into a partially weight-bearing tibial bone defect in sheep. The cement exhibited excellent biocompatibility and degraded more rapidly compared to a hydroxyapatite reference cement; after 4 months, 18% of the cement was degraded. We conclude that the newberyite cement was the most promising candidate of the investigated cements and has clear advantages over calcium phosphate cements, especially in terms of setting time and degradation behavior.
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Affiliation(s)
- Friederike Kaiser
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Lena Schröter
- Institute of Orthopedic Research and Biomechanics, Ulm University Medical Center, Ulm, Germany
| | - Philipp Wohlfahrt
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Isabel Geroneit
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Jérôme Murek
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Philipp Stahlhut
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Jan Weichhold
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Anita Ignatius
- Institute of Orthopedic Research and Biomechanics, Ulm University Medical Center, Ulm, Germany
| | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
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18
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King CL, Onohara D, Tom SK, Silverman M, Kikuchi Y, Lane BA, Wong K, Toma JR, Maddamma A, Padala M. Transapical ventricular reshaping reduces functional mitral regurgitation and improves ventricular function in a preclinical model of ischemic cardiomyopathy. J Thorac Cardiovasc Surg 2023:S0022-5223(23)00724-9. [PMID: 37597738 PMCID: PMC10874464 DOI: 10.1016/j.jtcvs.2023.08.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 07/27/2023] [Accepted: 08/01/2023] [Indexed: 08/21/2023]
Abstract
OBJECTIVE A significant proportion of patients with advanced heart failure present with dilated left ventricles and functional mitral regurgitation. These patients currently have limited treatment options. The MitraClip device (Abbott) has benefited only patients with smaller left ventricles (end-diastolic dimension <70 mm), whereas those with larger left ventricles did not benefit. A possible explanation is correcting functional mitral regurgitation alone may not adequately reduce the wall stresses of a dilated left ventricle. We have developed a beating-heart device that not only approximates the papillary muscles to reduce functional mitral regurgitation but also modifies the left ventricle size and shape to reduce wall stress. METHODS Yorkshire swine (n = 16) had a myocardial infarction induced by permanent occlusion of the left circumflex with intracoronary ethanol. Three months later, the animals developed heart failure and moderate or greater functional mitral regurgitation. Through a transapical approach, the new device was implanted under echocardiography guidance to reshape the left ventricle and correct functional mitral regurgitation. The acute impact of this approach on the mitral valve and left ventricle was assessed with echocardiography and invasive hemodynamics. RESULTS After reshaping, echocardiography showed a decrease in end-diastolic volume by 36.3 ± 30.5 mL (P < .001), a decrease in sphericity index by 0.143 ± 0.087 (P < .001), and an increase in ejection fraction of 5.90% ± 6.38% (P < .01). Mitral valve tenting area was reduced by 39.29 ± 33.66 mm2 (P < .001), coaptation length was increased by 2.12 ± 1.02 mm (P < .001), and posterior excursion angle was improved by 9.07° ± 9.14° (P < .01), resulting in functional mitral regurgitation reduction. CONCLUSIONS Correction of functional mitral regurgitation with favorable changes in mitral valve geometry and reduction in left ventricle geometry is possible with the proposed device.
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Affiliation(s)
- Chase L King
- Structural Heart Research and Innovation Laboratory, Cardiothoracic Research Laboratories, Carlyle Fraser Heart Center at Emory University Hospital Midtown, Atlanta, Ga; Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, Ga
| | - Daisuke Onohara
- Structural Heart Research and Innovation Laboratory, Cardiothoracic Research Laboratories, Carlyle Fraser Heart Center at Emory University Hospital Midtown, Atlanta, Ga; Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, Ga.
| | - Stephanie K Tom
- Structural Heart Research and Innovation Laboratory, Cardiothoracic Research Laboratories, Carlyle Fraser Heart Center at Emory University Hospital Midtown, Atlanta, Ga; Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, Ga
| | - Michael Silverman
- Structural Heart Research and Innovation Laboratory, Cardiothoracic Research Laboratories, Carlyle Fraser Heart Center at Emory University Hospital Midtown, Atlanta, Ga; Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, Ga
| | - Yuta Kikuchi
- Structural Heart Research and Innovation Laboratory, Cardiothoracic Research Laboratories, Carlyle Fraser Heart Center at Emory University Hospital Midtown, Atlanta, Ga; Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, Ga
| | - Brooks A Lane
- Structural Heart Research and Innovation Laboratory, Cardiothoracic Research Laboratories, Carlyle Fraser Heart Center at Emory University Hospital Midtown, Atlanta, Ga; Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, Ga
| | - Keawepono Wong
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Ga
| | - Julia R Toma
- Structural Heart Research and Innovation Laboratory, Cardiothoracic Research Laboratories, Carlyle Fraser Heart Center at Emory University Hospital Midtown, Atlanta, Ga; Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Ga
| | - Amanda Maddamma
- Structural Heart Research and Innovation Laboratory, Cardiothoracic Research Laboratories, Carlyle Fraser Heart Center at Emory University Hospital Midtown, Atlanta, Ga
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19
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Bernardini C, Mantia DL, Salaroli R, Ventrella D, Elmi A, Zannoni A, Forni M. Isolation of Vascular Wall Mesenchymal Stem Cells from the Thoracic Aorta of Adult Göttingen Minipigs: A New Protocol for the Simultaneous Endothelial Cell Collection. Animals (Basel) 2023; 13:2601. [PMID: 37627392 PMCID: PMC10451532 DOI: 10.3390/ani13162601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/09/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023] Open
Abstract
Two main classes of perivascular multipotent populations have been described: the microvascular pericytes and the vascular wall mesenchymal stem cells (VW-MSCs). VW-MSCs are isolated from large vessels in many species and they participate in vascular remodeling together with other cellular components such as endothelial cells. Considering that the Göttingen Minipigs are widely used in Europe as a translational model in the field of cardiovascular diseases, the aim of the present research was to isolate VW-MSCs from the adult aorta of Göttingen Minipigs while preserving and also collecting endothelial cells. The results obtained in the present research demonstrated that this new protocol allows us to obtain a pure population of VW-MSCs and endothelial cells. VW-MSCs from Göttingen Minipigs responded fully to the MSC minima international criteria, being positive to CD105, CD90, and CD44 and negative to CD45 and CD34. Moreover, VW-MSCs presented a differentiative potential towards osteogenic, chondrogenic, and adipogenic lineages. Overall, the present protocol, preserving the viability and phenotypic features of the two isolated populations, opens future possibilities of using minipig VW-MSCs and endothelial cells in in vitro vascular remodeling studies.
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Affiliation(s)
- Chiara Bernardini
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (C.B.); (R.S.); (D.V.); (A.E.); (A.Z.)
- Health Sciences and Technologies-Interdepartmental Center for Industrial Research (CIRI-SDV), Alma Mater Studiorum—University of Bologna, 40126 Bologna, Italy;
| | - Debora La Mantia
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (C.B.); (R.S.); (D.V.); (A.E.); (A.Z.)
| | - Roberta Salaroli
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (C.B.); (R.S.); (D.V.); (A.E.); (A.Z.)
| | - Domenico Ventrella
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (C.B.); (R.S.); (D.V.); (A.E.); (A.Z.)
| | - Alberto Elmi
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (C.B.); (R.S.); (D.V.); (A.E.); (A.Z.)
| | - Augusta Zannoni
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy; (C.B.); (R.S.); (D.V.); (A.E.); (A.Z.)
- Health Sciences and Technologies-Interdepartmental Center for Industrial Research (CIRI-SDV), Alma Mater Studiorum—University of Bologna, 40126 Bologna, Italy;
| | - Monica Forni
- Health Sciences and Technologies-Interdepartmental Center for Industrial Research (CIRI-SDV), Alma Mater Studiorum—University of Bologna, 40126 Bologna, Italy;
- Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy
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20
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McGilvray MM, Yates TAE, Pauls L, Kelly MO, Razo N, McElligott S, Foster GJ, Zheng J, Zoller JK, Zemlin C, Damiano RJ. An experimental model of chronic severe mitral regurgitation. JTCVS Tech 2023; 20:58-70. [PMID: 37555041 PMCID: PMC10405169 DOI: 10.1016/j.xjtc.2023.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 03/10/2023] [Accepted: 03/22/2023] [Indexed: 08/10/2023] Open
Abstract
Objective To develop a minimally invasive, reproducible model of chronic severe mitral regurgitation (MR) that replicates the clinical phenotype of left atrial (LA) and left ventricular dilation and susceptibility to atrial fibrillation. Methods Under transesophageal echocardiographic guidance, chordae tendinae were avulsed using endovascular forceps until the ratio of regurgitant jet area to LA area was ≥70%. Animals survived for an average of 8.6 ± 1.6 months (standard deviation) and imaged with monthly transthoracic echocardiography (TTE). Animals underwent baseline and preterminal magnetic resonance imaging. Terminal studies included TTE, transesophageal echocardiography, and rapid atrial pacing to test inducibility of atrial tachyarrhythmias. Results Eight dogs underwent creation of severe MR and interval monitoring. Two were excluded-one died from acute heart failure, and the other had resolution of MR. Six dogs underwent the full experimental protocol; only one required medical management of clinical heart failure. MR remained severe over time, with a mean terminal regurgitant jet area to LA area of 71 ± 14% (standard deviation) and regurgitant fraction of 52 ± 11%. Mean LA volume increased over 130% (TTE: 163 ± 147%, P = .039; magnetic resonance imaging: 132 ± 54%, P = .011). Mean left ventricular end-diastolic volume increased by 38 ± 21% (P = .008). Inducible atrial tachyarrhythmias were seen in 4 of 6 animals at terminal surgery, and none at baseline. Conclusions Within the 6 dogs that successfully completed the full experimental protocol, this model replicated the clinical phenotype of severe MR, which led to marked structural and electrophysiologic cardiac remodeling. This model allowed for precise measurements at repeated time points and will facilitate future studies to elucidate the mechanisms of atrial and ventricular remodeling secondary to MR and the pathophysiology of valvular atrial fibrillation.
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Affiliation(s)
- Martha M.O. McGilvray
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St Louis, Mo
| | - Tari-Ann E. Yates
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St Louis, Mo
| | - Lynn Pauls
- Division of Cardiothoracic Anesthesiology, Department of Anesthesiology, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo
| | - Meghan O. Kelly
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St Louis, Mo
| | - Nicholas Razo
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, St Louis, Mo
| | - Stacie McElligott
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St Louis, Mo
| | - Glenn J. Foster
- Center for Clinical Imaging and Research, Washington University School of Medicine, St Louis, Mo
| | - Jie Zheng
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, Mo
| | - Jonathan K. Zoller
- Division of Cardiothoracic Anesthesiology, Department of Anesthesiology, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo
| | - Christian Zemlin
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, St Louis, Mo
| | - Ralph J. Damiano
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St Louis, Mo
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Sridharan D, Pracha N, Rana SJ, Ahmed S, Dewani AJ, Alvi SB, Mergaye M, Ahmed U, Khan M. Preclinical Large Animal Porcine Models for Cardiac Regeneration and Its Clinical Translation: Role of hiPSC-Derived Cardiomyocytes. Cells 2023; 12:cells12071090. [PMID: 37048163 PMCID: PMC10093073 DOI: 10.3390/cells12071090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/29/2023] [Accepted: 03/30/2023] [Indexed: 04/14/2023] Open
Abstract
Myocardial Infarction (MI) occurs due to a blockage in the coronary artery resulting in ischemia and necrosis of cardiomyocytes in the left ventricular heart muscle. The dying cardiac tissue is replaced with fibrous scar tissue, causing a decrease in myocardial contractility and thus affecting the functional capacity of the myocardium. Treatments, such as stent placements, cardiac bypasses, or transplants are beneficial but with many limitations, and may decrease the overall life expectancy due to related complications. In recent years, with the advent of human induced pluripotent stem cells (hiPSCs), newer avenues using cell-based approaches for the treatment of MI have emerged as a potential for cardiac regeneration. While hiPSCs and their derived differentiated cells are promising candidates, their translatability for clinical applications has been hindered due to poor preclinical reproducibility. Various preclinical animal models for MI, ranging from mice to non-human primates, have been adopted in cardiovascular research to mimic MI in humans. Therefore, a comprehensive literature review was essential to elucidate the factors affecting the reproducibility and translatability of large animal models. In this review article, we have discussed different animal models available for studying stem-cell transplantation in cardiovascular applications, mainly focusing on the highly translatable porcine MI model.
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Affiliation(s)
- Divya Sridharan
- Department of Emergency Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Nooruddin Pracha
- Department of Emergency Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Schaza Javed Rana
- Department of Emergency Medicine, The Ohio State University, Columbus, OH 43210, USA
- Department of Internal Medicine, Northeast Georgia Medical Center, Gainesville, GA 30501, USA
| | - Salmman Ahmed
- Department of Emergency Medicine, The Ohio State University, Columbus, OH 43210, USA
- Lake Erie College of Osteopathic Medicine (LECOM), Erie, PA 16509, USA
| | - Anam J Dewani
- Department of Emergency Medicine, The Ohio State University, Columbus, OH 43210, USA
- Department of Chemistry & Biochemistry, The University of Toledo, Toledo, OH 43606, USA
| | - Syed Baseeruddin Alvi
- Department of Emergency Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Muhamad Mergaye
- Department of Emergency Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Uzair Ahmed
- Department of Emergency Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Mahmood Khan
- Department of Emergency Medicine, The Ohio State University, Columbus, OH 43210, USA
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210, USA
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22
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Ukita R, Wu WK, Liang J, Talackine JR, Patel YJ, Francois SA, Cardwell NL, Flynn CR, Shingina A, Washington MK, Trinh VQH, Bacchetta M, Alexopoulos SP. Pulmonary artery banding in sheep: a novel large animal model for congestive hepatopathy. J Appl Physiol (1985) 2023; 134:840-845. [PMID: 36759164 PMCID: PMC10042593 DOI: 10.1152/japplphysiol.00473.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 02/06/2023] [Accepted: 02/07/2023] [Indexed: 02/11/2023] Open
Abstract
Congestive hepatopathy is becoming increasingly recognized among Fontan-palliated patients. Elevated central venous pressure is thought to drive the pathologic progression, characterized by sinusoidal dilatation, congestion, and fibrosis. A clinically relevant large animal model for congestive hepatopathy would provide a valuable platform for researching novel biomarkers, treatment, and prevention. Here, we report on a titratable, sheep pulmonary artery banding model for this disease application. Pulmonary artery banding was achieved by progressively inflating the implanted pulmonary artery cuff. Right ventricular catheter was implanted to draw venous blood samples and measure pressure. The pulmonary artery cuff pressure served as a surrogate for the intensity of pulmonary artery banding and was measured weekly. After about 9 wk, animals were euthanized, and the liver was harvested for histopathological assessment. Nine animal subjects received pulmonary artery banding for 64 ± 8 days. Four of the nine subjects exhibited moderate to severe liver injury, and three of those four exhibited bridging fibrosis. Increasing pulmonary artery cuff pressure significantly correlated with declining mixed venous oxygen saturation (P = 3.29 × 10-5), and higher congestive hepatic fibrosis score (P = 0.0238), suggesting that pulmonary artery banding strategy can be titrated to achieve right-sided congestion and liver fibrosis. Blood analyses demonstrated an increase in plasma bile acids, aspartate aminotransferase, and γ-glutamyltransferase among subjects with moderate to severe injury, further corroborating liver tissue findings. Our large animal pulmonary artery banding model recapitulates congestive hepatopathy and provides a basis to bridge the current gaps in scientific and clinical understanding about the disease.NEW & NOTEWORTHY We present here a large animal platform for congestive hepatopathy, a disease growing in clinical prevalence due to the increasing number of Fontan-palliated patients. Further data are needed to develop a better clinical management strategy for this poorly characterized patient population. Previous reports of animal models to study this disease have mostly been in small animals with limited fidelity. We show that congestive hepatopathy can be replicated in a chronic, progressive pulmonary artery banding model in sheep. We also show that the banding strategy can be controlled to titrate the level of liver injury. To date, we do not know of any other large animal model that can achieve this level of control over disease phenotype and clinical relevance.
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Affiliation(s)
- Rei Ukita
- Department of Cardiac Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Wei Kelly Wu
- Department of Cardiac Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Division of Hepatobiliary Surgery and Liver Transplantation, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Jiancong Liang
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Jennifer R Talackine
- Department of Cardiac Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Yatrik J Patel
- Department of Cardiac Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Sean A Francois
- Department of Cardiac Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Nancy L Cardwell
- Department of Cardiac Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Charles R Flynn
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Alexandra Shingina
- Department of Medicine, Division of Gastroenterology, Hepatology and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Mary Kay Washington
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Vincent Quoc-Huy Trinh
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Matthew Bacchetta
- Department of Cardiac Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, United States
| | - Sophoclis P Alexopoulos
- Division of Hepatobiliary Surgery and Liver Transplantation, Vanderbilt University Medical Center, Nashville, Tennessee, United States
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23
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Pauly V, Vlcek J, Zhang Z, Hesse N, Xia R, Bauer J, Loy S, Schneider S, Renner S, Wolf E, Kääb S, Schüttler D, Tomsits P, Clauss S. Effects of Sex on the Susceptibility for Atrial Fibrillation in Pigs with Ischemic Heart Failure. Cells 2023; 12:cells12070973. [PMID: 37048048 PMCID: PMC10093477 DOI: 10.3390/cells12070973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 03/16/2023] [Accepted: 03/21/2023] [Indexed: 04/14/2023] Open
Abstract
Atrial fibrillation (AF) is the most prevalent arrhythmia, often caused by myocardial ischemia/infarction (MI). Men have a 1.5× higher prevalence of AF, whereas women show a higher risk for new onset AF after MI. However, the underlying mechanisms of how sex affects AF pathophysiology are largely unknown. In 72 pigs with/without ischemic heart failure (IHF) we investigated the impact of sex on ischemia-induced proarrhythmic atrial remodeling and the susceptibility for AF. Electrocardiogram (ECG) and electrophysiological studies were conducted to assess electrical remodeling; histological analyses were performed to assess atrial fibrosis in male and female pigs. IHF pigs of both sexes showed a significantly increased vulnerability for AF, but in male pigs more and longer episodes were observed. Unchanged conduction properties but enhanced left atrial fibrosis indicated structural rather than electrical remodeling underlying AF susceptibility. Sex differences were only observed in controls with female pigs showing an increased intrinsic heart rate, a prolonged QRS interval and a prolonged sinus node recovery time. In sum, susceptibility for AF is significantly increased both in male and female pigs with ischemic heart failure. Differences between males and females are moderate, including more and longer AF episodes in male pigs and sinus node dysfunction in female pigs.
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Affiliation(s)
- Valerie Pauly
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance, D-81377 Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, LMU Munich, Marchioninistrasse 68, D-81377 Munich, Germany
| | - Julia Vlcek
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, LMU Munich, Marchioninistrasse 68, D-81377 Munich, Germany
| | - Zhihao Zhang
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance, D-81377 Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, LMU Munich, Marchioninistrasse 68, D-81377 Munich, Germany
| | - Nora Hesse
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance, D-81377 Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, LMU Munich, Marchioninistrasse 68, D-81377 Munich, Germany
| | - Ruibing Xia
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance, D-81377 Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, LMU Munich, Marchioninistrasse 68, D-81377 Munich, Germany
| | - Julia Bauer
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance, D-81377 Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, LMU Munich, Marchioninistrasse 68, D-81377 Munich, Germany
| | - Simone Loy
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance, D-81377 Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, LMU Munich, Marchioninistrasse 68, D-81377 Munich, Germany
| | - Sarah Schneider
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance, D-81377 Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, LMU Munich, Marchioninistrasse 68, D-81377 Munich, Germany
| | - Simone Renner
- Interfaculty Center for Endocrine and Cardiovascular Disease Network Modelling and Clinical Transfer (ICONLMU), LMU Munich, Feodor-Lynen-Strasse 19, D-81377 Munich, Germany
- Chair for Molecular Animal Breeding and Biotechnology, Gene Center and Department of Veterinary Sciences, LMU Munich, Feodor-Lynen-Strasse 25, D-81377 Munich, Germany
- Center for Innovative Medical Models (CiMM), Department of Veterinary Sciences, LMU Munich, Hackerstrasse 27, D-85764 Oberschleissheim, Germany
- German Center for Diabetes Research (DZD), Ingolstädter Landstrasse 1, D-85764 Neuherberg, Germany
| | - Eckhard Wolf
- Interfaculty Center for Endocrine and Cardiovascular Disease Network Modelling and Clinical Transfer (ICONLMU), LMU Munich, Feodor-Lynen-Strasse 19, D-81377 Munich, Germany
- Chair for Molecular Animal Breeding and Biotechnology, Gene Center and Department of Veterinary Sciences, LMU Munich, Feodor-Lynen-Strasse 25, D-81377 Munich, Germany
- Center for Innovative Medical Models (CiMM), Department of Veterinary Sciences, LMU Munich, Hackerstrasse 27, D-85764 Oberschleissheim, Germany
- German Center for Diabetes Research (DZD), Ingolstädter Landstrasse 1, D-85764 Neuherberg, Germany
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Center, Grosshadern Campus, LMU Munich, Feodor-Lynen-Stasse 25, D-81377 Munich, Germany
| | - Stefan Kääb
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance, D-81377 Munich, Germany
- Interfaculty Center for Endocrine and Cardiovascular Disease Network Modelling and Clinical Transfer (ICONLMU), LMU Munich, Feodor-Lynen-Strasse 19, D-81377 Munich, Germany
| | - Dominik Schüttler
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance, D-81377 Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, LMU Munich, Marchioninistrasse 68, D-81377 Munich, Germany
| | - Philipp Tomsits
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance, D-81377 Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, LMU Munich, Marchioninistrasse 68, D-81377 Munich, Germany
| | - Sebastian Clauss
- Grosshadern Campus, Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University (LMU), Marchioninistrasse 15, D-81377 Munich, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Munich, Munich Heart Alliance, D-81377 Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital Munich, LMU Munich, Marchioninistrasse 68, D-81377 Munich, Germany
- Interfaculty Center for Endocrine and Cardiovascular Disease Network Modelling and Clinical Transfer (ICONLMU), LMU Munich, Feodor-Lynen-Strasse 19, D-81377 Munich, Germany
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24
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Cros C, Douard M, Chaigne S, Pasqualin C, Bru-Mercier G, Recalde A, Pascarel-Auclerc C, Hof T, Haïssaguerre M, Hocini M, Jaïs P, Bernus O, Brette F. Regional Differences in Ca(2+) Signaling and Transverse-Tubules across Left Atrium from Adult Sheep. Int J Mol Sci 2023; 24. [PMID: 36768669 DOI: 10.3390/ijms24032347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/27/2023] Open
Abstract
Cardiac excitation-contraction coupling can be different between regions of the heart. Little is known at the atria level, specifically in different regions of the left atrium. This is important given the role of cardiac myocytes from the pulmonary vein sleeves, which are responsible for ectopic activity during atrial fibrillation. In this study, we present a new method to isolate atrial cardiac myocytes from four different regions of the left atrium of a large animal model, sheep, highly relevant to humans. Using collagenase/protease we obtained calcium-tolerant atrial cardiac myocytes from the epicardium, endocardium, free wall and pulmonary vein regions. Calcium transients were slower (time to peak and time to decay) in free wall and pulmonary vein myocytes compared to the epicardium and endocardium. This is associated with lower t-tubule density. Overall, these results suggest regional differences in calcium transient and t-tubule density across left atria, which may play a major role in the genesis of atrial fibrillation.
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25
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Bow AJ, Rifkin RE, Priester C, Christopher CJ, Grzeskowiak RM, Hecht S, Adair SH, Mulon PY, Castro HF, Campagna SR, Anderson DE. Temporal metabolic profiling of bone healing in a caprine tibia segmental defect model. Front Vet Sci 2023; 9:1023650. [PMID: 36733424 PMCID: PMC9886884 DOI: 10.3389/fvets.2022.1023650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Accepted: 12/30/2022] [Indexed: 01/18/2023] Open
Abstract
Bone tissue engineering is an emerging field of regenerative medicine, with a wide array of biomaterial technologies and therapeutics employed. However, it is difficult to objectively compare these various treatments during various stages of tissue response. Metabolomics is rapidly emerging as a powerful analytical tool to establish broad-spectrum metabolic signatures for a target biological system. Developing an effective biomarker panel for bone repair from small molecule data would provide an objective metric to readily assess the efficacy of novel therapeutics in relation to natural healing mechanisms. In this study we utilized a large segmental bone defect in goats to reflect trauma resulting in substantial volumetric bone loss. Characterization of the native repair capacity was then conducted over a period of 12 months through the combination of standard (radiography, computed tomography, histology, biomechanics) data and ultra-high-performance liquid chromatography-high resolution mass spectrometry (UHPLC-HRMS) metabolic profiling. Standard metrics demonstrated that samples formed soft callus structures that later mineralized. Small molecule profiles showed distinct temporal patterns associated with the bone tissue repair process. Specifically, increased lactate and amino acid levels at early time points indicated an environment conducive to osteoblast differentiation and extracellular matrix formation. Citrate and pyruvate abundances increased at later time points indicating increasing mineral content within the defect region. Taurine, shikimate, and pantothenate distribution profiles appeared to represent a shift toward a more homeostatic remodeling environment with the differentiation and activity of osteoclasts offsetting the earlier deposition phases of bone repair. The generation of a comprehensive metabolic reference portfolio offers a potent mechanism for examining novel biomaterials and can serve as guide for the development of new targeted therapeutics to improve the rate, magnitude, and quality of bone regeneration.
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Affiliation(s)
- Austin J. Bow
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States,*Correspondence: Austin J. Bow ✉
| | - Rebecca E. Rifkin
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States
| | - Caitlin Priester
- Department of Animal Science, University of Tennessee, Knoxville, Knoxville, TN, United States
| | | | - Remigiusz M. Grzeskowiak
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States
| | - Silke Hecht
- Department of Small Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States
| | - Steve H. Adair
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States
| | - Pierre-Yves Mulon
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States
| | - Hector F. Castro
- Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN, United States,Biological and Small Molecule Mass Spectrometry Core and the Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Shawn R. Campagna
- Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN, United States,Biological and Small Molecule Mass Spectrometry Core and the Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN, United States
| | - David E. Anderson
- University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States,David E. Anderson ✉
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26
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Contreras E, Traserra S, Bolívar S, Forés J, Jose-Cunilleras E, Delgado-Martínez I, García F, Udina E, Navarro X. Repair of Long Peripheral Nerve Defects in Sheep: A Translational Model for Nerve Regeneration. Int J Mol Sci 2023; 24:ijms24021333. [PMID: 36674848 PMCID: PMC9863630 DOI: 10.3390/ijms24021333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/29/2022] [Accepted: 01/07/2023] [Indexed: 01/12/2023] Open
Abstract
Despite advances in microsurgery, full functional recovery of severe peripheral nerve injuries is not commonly attained. The sheep appears as a good preclinical model since it presents nerves with similar characteristics to humans. In this study, we induced 5 or 7 cm resection in the peroneal nerve and repaired with an autograft. Functional evaluation was performed monthly. Electromyographic and ultrasound tests were performed at 6.5 and 9 months postoperation (mpo). No significant differences were found between groups with respect to functional tests, although slow improvements were seen from 5 mpo. Electrophysiological tests showed compound muscle action potentials (CMAP) of small amplitude at 6.5 mpo that increased at 9 mpo, although they were significantly lower than the contralateral side. Ultrasound tests showed significantly reduced size of tibialis anterior (TA) muscle at 6.5 mpo and partially recovered size at 9 mpo. Histological evaluation of the grafts showed good axonal regeneration in all except one sheep from autograft 7 cm (AG7) group, while distal to the graft there was a higher number of axons than in control nerves. The results indicate that sheep nerve repair is a useful model for investigating long-gap peripheral nerve injuries.
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Affiliation(s)
- Estefanía Contreras
- Institute of Neurosciences, Department Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
- Integral Service for Laboratory Animals (SIAL), Faculty of Veterinary, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Sara Traserra
- Institute of Neurosciences, Department Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
- Integral Service for Laboratory Animals (SIAL), Faculty of Veterinary, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Sara Bolívar
- Institute of Neurosciences, Department Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
| | - Joaquím Forés
- Institute of Neurosciences, Department Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
- Hand and Peripheral Nerve Unit, Hospital Clínic i Provincial, Universitat de Barcelona, 08036 Barcelona, Spain
| | - Eduard Jose-Cunilleras
- Department of Animal Medicine and Surgery, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Ignacio Delgado-Martínez
- Institute of Neurosciences, Department Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
| | - Félix García
- Department of Animal Medicine and Surgery, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Esther Udina
- Institute of Neurosciences, Department Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
| | - Xavier Navarro
- Institute of Neurosciences, Department Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
- Correspondence: ; Tel.: +34-93-5811966
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27
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Li K, Cardoso C, Moctezuma-Ramirez A, Elgalad A, Perin E. Evaluation of large animal models for preclinical studies of heart failure with preserved ejection fraction using clinical score systems. Front Cardiovasc Med 2023; 10:1099453. [PMID: 37034319 PMCID: PMC10076838 DOI: 10.3389/fcvm.2023.1099453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 03/02/2023] [Indexed: 04/11/2023] Open
Abstract
Heart failure with preserved ejection fraction (HFpEF) is characterized by a complex, heterogeneous spectrum of pathologic features combined with average left ventricular volume and diastolic dysfunction. HFpEF is a significant public health problem associated with high morbidity and mortality rates. Currently, effective treatments for HFpEF represent the greatest unmet need in cardiovascular medicine. A lack of an efficient preclinical model has hampered the development of new devices and medications for HFpEF. Because large animal models have similar physiologic traits as humans and appropriate organ sizes, they are the best option for limiting practical constraints. HFpEF is a highly integrated, multiorgan, systemic disorder requiring a multipronged investigative approach. Here, we review the large animal models of HFpEF reported to date and describe the methods that have been used to create HFpEF, including surgery-induced pressure overloading, medicine-induced pressure overloading, and diet-induced metabolic syndrome. In addition, for the first time to our knowledge, we use two established clinical HFpEF algorithms (HFA-PEFF and H2FPEF scores) to evaluate the currently available large animal models. We also discuss new technologies, such as continuous remote pressure monitors and inflatable aortic cuffs, as well as how the models could be improved. Based on current progress and our own experience, we believe an efficient large animal model of HFpEF should simultaneously encompass multiple pathophysiologic factors, along with multiorgan dysfunction. This could be fully evaluated through available methods (imaging, blood work). Although many models have been studied, only a few studies completely meet clinical score standards. Therefore, it is critical to address the deficiencies of each model and incorporate novel techniques to establish a more reliable model, which will help facilitate the understanding of HFpEF mechanisms and the development of a treatment.
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Affiliation(s)
- Ke Li
- Center for Preclinical Cardiovascular Research, The Texas Heart Institute, Houston, TX, United States
| | - Cristiano Cardoso
- Center for Preclinical Cardiovascular Research, The Texas Heart Institute, Houston, TX, United States
| | - Angel Moctezuma-Ramirez
- Center for Preclinical Cardiovascular Research, The Texas Heart Institute, Houston, TX, United States
| | - Abdelmotagaly Elgalad
- Center for Preclinical Cardiovascular Research, The Texas Heart Institute, Houston, TX, United States
- Correspondence: Abdelmotagaly Elgalad
| | - Emerson Perin
- Center for Clinical Research, The Texas Heart Institute, Houston, TX, United States
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28
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Gannon J, Imran KM, Hendricks-Wenger A, Edwards M, Covell H, Ruger L, Singh N, Nagai-Singer M, Tintera B, Eden K, Mendiratta-Lala M, Vidal-Jove J, Luyimbazi D, Larson M, Clark-Deener S, Coutermarsh-Ott S, Allen IC, Vlaisavljevich E. Ultrasound-guided noninvasive pancreas ablation using histotripsy: feasibility study in an in vivo porcine model. Int J Hyperthermia 2023; 40:2247187. [PMID: 37643768 PMCID: PMC10839746 DOI: 10.1080/02656736.2023.2247187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/21/2023] [Accepted: 08/07/2023] [Indexed: 08/31/2023] Open
Abstract
Pancreatic cancer is a malignant disease associated with poor survival and nearly 80% present with unresectable tumors. Treatments such as chemotherapy and radiation therapy have shown overall improved survival benefits, albeit limited. Histotripsy is a noninvasive, non-ionizing, and non-thermal focused ultrasound ablation modality that has shown efficacy in treating hepatic tumors and other malignancies. In this novel study, we investigate histotripsy for noninvasive pancreas ablation in a pig model. In two studies, histotripsy was applied to the healthy pancreas in 11 pigs using a custom 32-element, 500 kHz histotripsy transducer attached to a clinical histotripsy system, with treatments guided by real-time ultrasound imaging. A pilot study was conducted in 3 fasted pigs with histotripsy applied at a pulse repetition frequency (PRF) of 500 Hz. Results showed no pancreas visualization on coaxial ultrasound imaging due to overlying intestinal gas, resulting in off-target injury and no pancreas damage. To minimize gas, a second group of pigs (n = 8) were fed a custard diet containing simethicone and bisacodyl. Pigs were euthanized immediately (n = 4) or survived for 1 week (n = 4) post-treatment. Damage to the pancreas and surrounding tissue was characterized using gross morphology, histological analysis, and CT imaging. Results showed histotripsy bubble clouds were generated inside pancreases that were visually maintained on coaxial ultrasound (n = 4), with 2 pigs exhibiting off-target damage. For chronic animals, results showed the treatments were well-tolerated with no complication signs or changes in blood markers. This study provides initial evidence suggesting histotripsy's potential for noninvasive pancreas ablation and warrants further evaluation in more comprehensive studies.
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Affiliation(s)
- Jessica Gannon
- Department of Biomedical Engineering and Mechanics, VA Tech, Blacksburg, VA, USA
| | - Khan Mohammad Imran
- Department of Biomedical Sciences and Pathobiology, Virginia-MD College of Veterinary Medicine, Blacksburg, VA, USA
- Graduate Program in Translational Biology, Medicine and Health, Virginia Tech, Roanoke, VA, USA
| | - Alissa Hendricks-Wenger
- Department of Biomedical Engineering and Mechanics, VA Tech, Blacksburg, VA, USA
- Department of Biomedical Sciences and Pathobiology, Virginia-MD College of Veterinary Medicine, Blacksburg, VA, USA
- Graduate Program in Translational Biology, Medicine and Health, Virginia Tech, Roanoke, VA, USA
- DeBusk College of Osteopathic Medicine, Lincoln Memorial University, Knoxville, TN, USA
| | - Michael Edwards
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, US
| | - Hannah Covell
- Department of Biomedical Engineering and Mechanics, VA Tech, Blacksburg, VA, USA
| | - Lauren Ruger
- Department of Biomedical Engineering and Mechanics, VA Tech, Blacksburg, VA, USA
| | - Neha Singh
- Department of Basic Science Education, Virginia Tech Carilion School of Medicine, Roanoke, VA, USA
| | - Margaret Nagai-Singer
- Department of Biomedical Sciences and Pathobiology, Virginia-MD College of Veterinary Medicine, Blacksburg, VA, USA
| | - Benjamin Tintera
- Department of Basic Science Education, Virginia Tech Carilion School of Medicine, Roanoke, VA, USA
| | - Kristin Eden
- Department of Basic Science Education, Virginia Tech Carilion School of Medicine, Roanoke, VA, USA
| | | | - Joan Vidal-Jove
- Interventional Oncology Institute Khuab, Comprehensive Tumor Center, Barcelona, Spain
| | - David Luyimbazi
- Department of Basic Science Education, Virginia Tech Carilion School of Medicine, Roanoke, VA, USA
- Department of Surgery, Carilion Clinic, Roanoke, VA, USA
| | - Martha Larson
- Department of Large Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, USA
| | - Sherrie Clark-Deener
- Department of Large Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, USA
| | - Sheryl Coutermarsh-Ott
- Department of Biomedical Sciences and Pathobiology, Virginia-MD College of Veterinary Medicine, Blacksburg, VA, USA
| | - Irving C. Allen
- Department of Biomedical Sciences and Pathobiology, Virginia-MD College of Veterinary Medicine, Blacksburg, VA, USA
- Graduate Program in Translational Biology, Medicine and Health, Virginia Tech, Roanoke, VA, USA
- Department of Basic Science Education, Virginia Tech Carilion School of Medicine, Roanoke, VA, USA
- ICTAS Center for Engineering Health, Virginia Tech, Blacksburg, VA
| | - Eli Vlaisavljevich
- Department of Biomedical Engineering and Mechanics, VA Tech, Blacksburg, VA, USA
- Graduate Program in Translational Biology, Medicine and Health, Virginia Tech, Roanoke, VA, USA
- ICTAS Center for Engineering Health, Virginia Tech, Blacksburg, VA
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29
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Tanaka S, Nishinaka T, Umeki A, Fujii M, Imaoka S, Kobayashi F, Inatomi A, Katagiri N, Tsukiya T, Mizuno T, Ono M. Coronary microembolization sheep model by adjusting the number of microspheres based on coronary blood flow. Artif Organs 2023; 47:138-147. [PMID: 35962546 DOI: 10.1111/aor.14385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND A heart failure (HF) model using coronary microembolization in large animals is indispensable for medical research. However, the heterogeneity of myocardial response to microembolization is a limitation. We hypothesized that adjusting the number of injected microspheres according to coronary blood flow could stabilize the severity of HF. This study aimed to evaluate the effect of microsphere injection based on the left coronary artery blood flow in an animal model. METHODS Microembolization was induced by injecting different numbers of microspheres (polystyrene, diameter: 90 μm) into the left descending coronary artery of the two groups of sheep (400 and 600 times coronary blood flow [ml/min]). Hemodynamic parameters, the pressure-volume loop of the left ventricle, and echocardiography findings were examined at 0.5, 1.5, 3.5, and 6.5 h after microembolization. RESULTS End-diastolic pressure and normalized heart rate increased over time, and were significantly higher in 600 × coronary blood flow group than those in 400 × coronary blood flow group (p = 0.04 and p < 0.01, respectively). The maximum rate of left-ventricular pressure rise and normalized stroke volume decreased over time, and were significantly lower in 600 × coronary blood flow group than those in 400 × coronary blood flow group (p < 0.01 and p < 0.01, respectively). The number of microspheres per coronary blood flow was significantly correlated with the decrease in stroke volume and the maximum rate of left ventricular pressure rise in 6.5 h (r = 0.74, p = 0.01 and r = 0.71, p = 0.02, respectively). CONCLUSIONS Adjusting the number of injected microspheres based on the coronary blood flow enabled the creation of HF models with different degrees of severity.
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Affiliation(s)
- Shun Tanaka
- Department of Artificial Organs, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Tomohiro Nishinaka
- Department of Artificial Organs, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Akihide Umeki
- Department of Artificial Organs, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Masahiko Fujii
- Department of Artificial Organs, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Shusuke Imaoka
- Department of Artificial Organs, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Futoshi Kobayashi
- Department of Artificial Organs, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Ayako Inatomi
- Department of Artificial Organs, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Nobumasa Katagiri
- Department of Artificial Organs, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Tomonori Tsukiya
- Department of Artificial Organs, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Toshihide Mizuno
- Department of Artificial Organs, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Minoru Ono
- Department of Cardiac Surgery, The University of Tokyo, Tokyo, Japan
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30
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Taghian T, Gallagher J, Batcho E, Pullan C, Kuchel T, Denney T, Perumal R, Moore S, Muirhead R, Herde P, Johns D, Christou C, Taylor A, Passler T, Pulaparthi S, Hall E, Chandra S, O’Neill CA, Gray-Edwards H. Brain Alterations in Aged OVT73 Sheep Model of Huntington's Disease: An MRI Based Approach. J Huntingtons Dis 2022; 11:391-406. [PMID: 36189602 PMCID: PMC9837686 DOI: 10.3233/jhd-220526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Huntington's disease (HD) is a fatal neurodegenerative autosomal dominant disorder with prevalence of 1 : 20000 that has no effective treatment to date. Translatability of candidate therapeutics could be enhanced by additional testing in large animal models because of similarities in brain anatomy, size, and immunophysiology. These features enable realistic pre-clinical studies of biodistribution, efficacy, and toxicity. OBJECTIVE AND METHODS Here we non-invasively characterized alterations in brain white matter microstructure, neurochemistry, neurological status, and mutant Huntingtin protein (mHTT) levels in cerebrospinal fluid (CSF) of aged OVT73 HD sheep. RESULTS Similar to HD patients, CSF mHTT differentiates HD from normal sheep. Our results are indicative of a decline in neurological status, and alterations in brain white matter diffusion and spectroscopy metric that are more severe in aged female HD sheep. Longitudinal analysis of aged female HD sheep suggests that the decline is detectable over the course of a year. In line with reports of HD human studies, white matter alterations in corpus callosum correlates with a decline in gait of HD sheep. Moreover, alterations in the occipital cortex white matter correlates with a decline in clinical rating score. In addition, the marker of energy metabolism in striatum of aged HD sheep, shows a correlation with decline of clinical rating score and eye coordination. CONCLUSION This data suggests that OVT73 HD sheep can serve as a pre-manifest large animal model of HD providing a platform for pre-clinical testing of HD therapeutics and non-invasive tracking of the efficacy of the therapy.
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Affiliation(s)
- Toloo Taghian
- Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA, USA,
Department of Radiology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Jillian Gallagher
- Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA, USA
| | - Erin Batcho
- Department of Electrical and Computer Engineering, Auburn University, Auburn, AL, USA
| | - Caitlin Pullan
- South Australian Health and Medical Research Institute, Gillies Plains, SA, Australia
| | - Tim Kuchel
- South Australian Health and Medical Research Institute, Gillies Plains, SA, Australia
| | - Thomas Denney
- Department of Electrical and Computer Engineering, Auburn University, Auburn, AL, USA
| | - Raj Perumal
- South Australian Health and Medical Research Institute, Gillies Plains, SA, Australia
| | - Shamika Moore
- South Australian Health and Medical Research Institute, Gillies Plains, SA, Australia
| | - Robb Muirhead
- South Australian Health and Medical Research Institute, Gillies Plains, SA, Australia
| | - Paul Herde
- South Australian Health and Medical Research Institute, Gillies Plains, SA, Australia
| | - Daniel Johns
- South Australian Health and Medical Research Institute, Gillies Plains, SA, Australia
| | - Chris Christou
- South Australian Health and Medical Research Institute, Gillies Plains, SA, Australia
| | - Amanda Taylor
- Department of Clinical Sciences, Auburn University, Auburn, AL, USA
| | - Thomas Passler
- Department of Electrical and Computer Engineering, Auburn University, Auburn, AL, USA
| | - Sanjana Pulaparthi
- Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA, USA
| | - Erin Hall
- Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA, USA
| | - Sundeep Chandra
- Sana Biotechnology, South San Francisco, CA, USA,Bio Marin Pharmaceutical Inc., San Rafael, CA, USA
| | | | - Heather Gray-Edwards
- Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA, USA,
Department of Radiology, University of Massachusetts Medical School, Worcester, MA, USA,Correspondence to: Heather L. Gray-Edwards, DVM, PhD, University of Massachusetts Medical School, Department of Radiology and Horae Gene Therapy Center, 368 Plantation Street, ASC6-2055, Worcester, MA 01605, USA. Tel.: +1 508 856 4051; Fax: +1 508 856 1552; E-mail:
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31
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Shi X, Zhu S, Liu M, Stone SS, Rong Y, Mao K, Xu X, Ma C, Jiang Z, Zha Y, Yan C, Yu X, Wu D, Liu G, Mi J, Zhao J, Li Y, Ding Y, Wang X, Zhang YB, Ji X. Single-Cell RNA-Seq Reveals a Population of Smooth Muscle Cells Responsible for Atherogenesis. Aging Dis 2022; 13:1939-1953. [PMID: 36465170 PMCID: PMC9662277 DOI: 10.14336/ad.2022.0313] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 03/13/2022] [Indexed: 01/30/2024] Open
Abstract
Understanding the regional propensity differences of atherosclerosis (AS) development is hindered by the lack of animal models suitable for the study of the disease process. In this paper, we used 3S-ASCVD dogs, an ideal large animal human-like models for AS, to interrogate the heterogeneity of AS-prone and AS-resistant arteries; and at the single-cell level, identify the dominant cells involved in AS development. Here we present data from 3S-ASCVD dogs which reliably mimic human AS pathophysiology, predilection for lesion sites, and endpoint events. Our analysis combined bulk RNA-seq with single-cell RNA-seq to depict the transcriptomic profiles and cellular atlas of AS-prone and AS-resistant arteries in 3S-ASCVD dogs. Our results revealed the integral role of smooth muscle cells (SMCs) in regional propensity for AS. Notably, TNC+ SMCs were major contributors to AS development in 3S-ASCVD dogs, indicating enhanced extracellular matrix remodeling and transition to myofibroblasts during the AS process. Moreover, TNC+ SMCs were also present in human AS-prone carotid plaques, suggesting a potential origin of myofibroblasts and supporting the relevance of our findings. Our study provides a promising large animal model for pre-clinical studies of ASCVD and add novel insights surrounding the regional propensity of AS development in humans, which may lead to interventions that delay or prevent lesion progression and adverse clinical events.
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Affiliation(s)
- Xiaofeng Shi
- School of Engineering Medicine, Beihang University, Beijing, China.
- Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China.
| | - Shangming Zhu
- School of Engineering Medicine, Beihang University, Beijing, China.
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
| | - Meijing Liu
- School of Engineering Medicine, Beihang University, Beijing, China.
| | - Sara Saymuah Stone
- Department of Neurosurgery, Wayne State University School of Medicine, Detroit, MI, USA.
| | - Yao Rong
- School of Engineering Medicine, Beihang University, Beijing, China.
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
| | - Ke Mao
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
| | - Xiaopeng Xu
- School of Engineering Medicine, Beihang University, Beijing, China.
| | - Chao Ma
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
| | - Zhuoyuan Jiang
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
| | - Yan Zha
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
| | - Chun Yan
- School of Engineering Medicine, Beihang University, Beijing, China.
| | - Xiaofan Yu
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
| | - Di Wu
- Department of Neurology and China-America Institute of Neuroscience, Xuanwu Hospital, Capital Medical University, Beijing, China.
| | - Guiyou Liu
- Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China.
| | - Jidong Mi
- Beijing SINOGENE Biotechnology Co., Ltd, Beijing, China.
| | - Jianping Zhao
- Beijing SINOGENE Biotechnology Co., Ltd, Beijing, China.
| | - Yuan Li
- Beijing SINOGENE Biotechnology Co., Ltd, Beijing, China.
| | - Yuchuan Ding
- Department of Neurosurgery, Wayne State University School of Medicine, Detroit, MI, USA.
| | - Xiaogang Wang
- School of Engineering Medicine, Beihang University, Beijing, China.
- Key Laboratory of Big Data-Based Precision Medicine (Beihang University) Ministry of Industry and Information Technology, Beijing, China.
| | - Yong-Biao Zhang
- School of Engineering Medicine, Beihang University, Beijing, China.
- Key Laboratory of Big Data-Based Precision Medicine (Beihang University) Ministry of Industry and Information Technology, Beijing, China.
| | - Xunming Ji
- Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China.
- Department of Neurology and China-America Institute of Neuroscience, Xuanwu Hospital, Capital Medical University, Beijing, China.
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Berndt M, Buttenberg M, Graw JA. Large Animal Models for Simulating Physiology of Transfusion of Red Cell Concentrates-A Scoping Review of The Literature. Medicina (Kaunas) 2022; 58:medicina58121735. [PMID: 36556937 PMCID: PMC9787038 DOI: 10.3390/medicina58121735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 11/15/2022] [Indexed: 11/29/2022]
Abstract
Background and Objectives: Transfusion of red cell concentrates is a key component of medical therapy. To investigate the complex transfusion-associated biochemical and physiological processes as well as potential risks for human recipients, animal models are of particular importance. This scoping review summarizes existing large animal transfusion models for their ability to model the physiology associated with the storage of erythrocyte concentrates. Materials and Methods: The electronic databases PubMed, EMBASE, and Web of Science were systematically searched for original studies providing information on the intravenous application of erythrocyte concentrates in porcine, ovine, and canine animal models. Results: A total of 36 studies were included in the analysis. The majority of porcine studies evaluated hemorrhagic shock conditions. Pig models showed high physiological similarities with regard to red cell physiology during early storage. Ovine and canine studies were found to model typical aspects of human red cell storage at 42 days. Only four studies provided data on 24 h in vivo survival of red cells. Conclusions: While ovine and canine models can mimic typical human erythrocyte storage for up to 42 days, porcine models stand out for reliably simulating double-hit pathologies such as hemorrhagic shock. Large animal models remain an important area of translational research since they have an impact on testing new pharmacological or biophysical interventions to attenuate storage-related adverse effects and allow, in a controlled environment, to study background and interventions in dynamic and severe disease conditions.
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Affiliation(s)
- Melanie Berndt
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany
| | - Maximilian Buttenberg
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany
- Correspondence:
| | - Jan A. Graw
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany
- Department of Anesthesiology and Intensive Care Medicine, Ulm University, 89081 Ulm, Germany
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Burdzinska A, Galanty M, Więcek S, Dabrowski FA, Lotfy A, Sadkowski T. The Intersection of Human and Veterinary Medicine-A Possible Direction towards the Improvement of Cell Therapy Protocols in the Treatment of Perianal Fistulas. Int J Mol Sci 2022; 23. [PMID: 36430390 DOI: 10.3390/ijms232213917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/31/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
The effective treatment of perianal fistulizing Crohn's disease is still a challenge. Local administration of mesenchymal stromal cells (MSCs) is becoming a part of accepted treatment options. However, as a fledgling technique, it still can be optimized. A new trend in translational research, which is in line with "One Health" approach, bases on exploiting parallels between naturally occurring diseases affecting humans and companion animals. Canine anal furunculosis (AF) has been indicated as condition analogous to human perianal Crohn's disease (pCD). This narrative review provides the first comprehensive comparative analysis of these two diseases based on the published data. The paper also outlines the molecular mechanisms of action of MSCs which are likely to have a role in modulating the perianal fistula niche in humans, and refers them to the current knowledge on the immunomodulatory properties of canine MSCs. Generally, the pathogenesis of both diseases shares main determinants such as the presence of genetic predispositions, dysregulation of immune response and the relation to intestine microbiota. However, we also identified many aspects which should be further specified, such as determining the frequency of true fistulas formation in AF patients, elucidating the role of TNF and Th17 pathway in the pathogenesis of AF, or clarifying the role of epithelial-to-mesenchymal transition phenomenon in the formation of canine fistulae. Nevertheless, the available data support the hypothesis that the results from testing cell therapies in dogs with anal furunculosis have a significant translational value in optimizing MSC transplants procedures in pCD patients.
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Vientós-Plotts AI, Ericsson AC, McAdams ZL, Rindt H, Reinero CR. Respiratory dysbiosis in cats with spontaneous allergic asthma. Front Vet Sci 2022; 9:930385. [PMID: 36157187 PMCID: PMC9492960 DOI: 10.3389/fvets.2022.930385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 07/04/2022] [Indexed: 12/31/2022] Open
Abstract
Deviations from a core airway microbiota have been associated with the development and progression of asthma as well as disease severity. Pet cats represent a large animal model for allergic asthma, as they spontaneously develop a disease similar to atopic childhood asthma. This study aimed to describe the lower airway microbiota of asthmatic pet cats and compare it to healthy cats to document respiratory dysbiosis occurring with airway inflammation. We hypothesized that asthmatic cats would have lower airway dysbiosis characterized by a decrease in richness, diversity, and alterations in microbial community composition including identification of possible pathobionts. In the current study, a significant difference in airway microbiota composition was documented between spontaneously asthmatic pet cats and healthy research cats mirroring the finding of dysbiosis in asthmatic humans. Filobacterium and Acinetobacter spp. were identified as predominant taxa in asthmatic cats without documented infection based on standard culture and could represent pathobionts in the lower airways of cats. Mycoplasma felis, a known lower airway pathogen of cats, was identified in 35% of asthmatic but not healthy cats. This article has been published alongside "Temporal changes of the respiratory microbiota as cats transition from health to experimental acute and chronic allergic asthma" (1).
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Affiliation(s)
- Aida I. Vientós-Plotts
- College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- Comparative Internal Medicine Laboratory, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
| | - Aaron C. Ericsson
- College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- University of Missouri Metagenomics Center, University of Missouri, Columbia, MO, United States
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
| | - Zachary L. McAdams
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
| | - Hansjorg Rindt
- College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- Comparative Internal Medicine Laboratory, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
| | - Carol R. Reinero
- College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- Comparative Internal Medicine Laboratory, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
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Vientós-Plotts AI, Ericsson AC, McAdams ZL, Rindt H, Reinero CR. Temporal changes of the respiratory microbiota as cats transition from health to experimental acute and chronic allergic asthma. Front Vet Sci 2022; 9:983375. [PMID: 36090168 PMCID: PMC9453837 DOI: 10.3389/fvets.2022.983375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/08/2022] [Indexed: 01/04/2023] Open
Abstract
In humans, deviation from a core airway microbiota may predispose to development, exacerbation, or progression of asthma. We proposed to describe microbiota changes using 16 rRNA sequencing in samples from the upper and lower airways, and rectal swabs of 8 cats after experimental induction of asthma using Bermuda grass allergen, in acute (6 weeks) and chronic (36 weeks) stages. We hypothesized that asthma induction would decrease richness and diversity and alter microbiota composition and structure in the lower airways, without significantly impacting other sites. After asthma induction, richness decreased in rectal (p = 0.014) and lower airway (p = 0.016) samples. B diversity was significantly different between health and chronic asthma in all sites, and between all time points for lower airways. In healthy lower airways Pseudomonadaceae comprised 80.4 ± 1.3% whereas Sphingobacteriaceae and Xanthobacteraceae predominated (52.4 ± 2.2% and 33.5 ± 2.1%, respectively), and Pseudomonadaceae was absent, in 6/8 cats with chronic asthma. This study provides evidence that experimental induction of asthma leads to dysbiosis in the airways and distant sites in both the acute and chronic stages of disease. This article has been published alongside "Respiratory dysbiosis in cats with spontaneous allergic asthma" (1).
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Affiliation(s)
- Aida I. Vientós-Plotts
- College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- Comparative Internal Medicine Laboratory, University of Missouri, Columbia, MO, United States
| | - Aaron C. Ericsson
- College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- University of Missouri Metagenomics Center, University of Missouri, Columbia, MO, United States
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
| | - Zachary L. McAdams
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
| | - Hansjorg Rindt
- College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- Comparative Internal Medicine Laboratory, University of Missouri, Columbia, MO, United States
| | - Carol R. Reinero
- College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, United States
- Comparative Internal Medicine Laboratory, University of Missouri, Columbia, MO, United States
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Eaton SL, Murdoch F, Rzechorzek NM, Thompson G, Hartley C, Blacklock BT, Proudfoot C, Lillico SG, Tennant P, Ritchie A, Nixon J, Brennan PM, Guido S, Mitchell NL, Palmer DN, Whitelaw CBA, Cooper JD, Wishart TM. Modelling Neurological Diseases in Large Animals: Criteria for Model Selection and Clinical Assessment. Cells 2022; 11:cells11172641. [PMID: 36078049 PMCID: PMC9454934 DOI: 10.3390/cells11172641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/19/2022] [Accepted: 08/22/2022] [Indexed: 11/16/2022] Open
Abstract
Issue: The impact of neurological disorders is recognised globally, with one in six people affected in their lifetime and few treatments to slow or halt disease progression. This is due in part to the increasing ageing population, and is confounded by the high failure rate of translation from rodent-derived therapeutics to clinically effective human neurological interventions. Improved translation is demonstrated using higher order mammals with more complex/comparable neuroanatomy. These animals effectually span this translational disparity and increase confidence in factors including routes of administration/dosing and ability to scale, such that potential therapeutics will have successful outcomes when moving to patients. Coupled with advancements in genetic engineering to produce genetically tailored models, livestock are increasingly being used to bridge this translational gap. Approach: In order to aid in standardising characterisation of such models, we provide comprehensive neurological assessment protocols designed to inform on neuroanatomical dysfunction and/or lesion(s) for large animal species. We also describe the applicability of these exams in different large animals to help provide a better understanding of the practicalities of cross species neurological disease modelling. Recommendation: We would encourage the use of these assessments as a reference framework to help standardise neurological clinical scoring of large animal models.
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Affiliation(s)
- Samantha L. Eaton
- Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
- Correspondence: (S.L.E.); (T.M.W.); Tel.: +44-(0)-131-651-9125 (S.L.E.); +44-(0)-131-651-9233 (T.M.W.)
| | - Fraser Murdoch
- Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
| | - Nina M. Rzechorzek
- Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Gerard Thompson
- Centre for Clinical Brain Sciences, University of Edinburgh, Chancellor’s Building, 49 Little France Crescent, Edinburgh EH16 4SB, UK
- Department of Clinical Neurosciences, NHS Lothian, 50 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Claudia Hartley
- Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
| | - Benjamin Thomas Blacklock
- Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
| | - Chris Proudfoot
- The Large Animal Research & Imaging Facility, Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
| | - Simon G. Lillico
- Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
| | - Peter Tennant
- The Large Animal Research & Imaging Facility, Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
| | - Adrian Ritchie
- The Large Animal Research & Imaging Facility, Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
| | - James Nixon
- The Large Animal Research & Imaging Facility, Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
| | - Paul M. Brennan
- Translational Neurosurgery, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh EH16 4SB, UK
| | - Stefano Guido
- Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
- Bioresearch & Veterinary Services, University of Edinburgh, Chancellor’s Building, 49 Little France Crescent, Edinburgh EH16 4SB, UK
| | - Nadia L. Mitchell
- Faculty of Agriculture and Life Sciences, Lincoln University, P.O. Box 85084, Lincoln 7647, New Zealand
| | - David N. Palmer
- Faculty of Agriculture and Life Sciences, Lincoln University, P.O. Box 85084, Lincoln 7647, New Zealand
| | - C. Bruce A. Whitelaw
- Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
| | - Jonathan D. Cooper
- Departments of Pediatrics, Genetics, and Neurology, Washington University School of Medicine in St. Louis, 660 S Euclid Ave, St. Louis, MO 63110, USA
| | - Thomas M. Wishart
- Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, UK
- Correspondence: (S.L.E.); (T.M.W.); Tel.: +44-(0)-131-651-9125 (S.L.E.); +44-(0)-131-651-9233 (T.M.W.)
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Gwon Y, Kim W, Park S, Kim Y, Kim H, Kim M, Kim J. Tissue-engineered tendon nano-constructs for repair of chronic rotator cuff tears in large animal models. Bioeng Transl Med 2022; 8:e10376. [PMID: 36684112 PMCID: PMC9842040 DOI: 10.1002/btm2.10376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 06/13/2022] [Accepted: 06/24/2022] [Indexed: 01/25/2023] Open
Abstract
Chronic rotator cuff tears (RCTs) are one of the most common injuries of shoulder pain. Despite the recent advances in surgical techniques and improved clinical outcomes of arthroscopically repaired rotator cuffs (RCs), complete functional recovery-without retear-of the RC tendon through tendon-to-bone interface (TBI) regeneration remains a key clinical goal to be achieved. Inspired by the highly organized nanostructured extracellular matrix in RC tendon tissue, we propose herein a tissue-engineered tendon nano-construct (TNC) for RC tendon regeneration. When compared with two currently used strategies (i.e., transosseous sutures and stem cell injections), our nano-construct facilitated more significant healing of all parts of the TBI (i.e., tendon, fibrocartilages, and bone) in both rabbit and pig RCT models owing to its enhancements in cell proliferation and differentiation, protein expression, and growth factor secretion. Overall, our findings demonstrate the high potential of this transplantable tendon nano-construct for clinical repair of chronic RCTs.
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Affiliation(s)
- Yonghyun Gwon
- Department of Convergence Biosystems EngineeringChonnam National UniversityGwangjuRepublic of Korea,Department of Rural and Biosystems EngineeringChonnam National UniversityGwangjuRepublic of Korea,Interdisciplinary Program in IT‐Bio Convergence SystemChonnam National UniversityGwangjuRepublic of Korea
| | - Woochan Kim
- Department of Convergence Biosystems EngineeringChonnam National UniversityGwangjuRepublic of Korea,Department of Rural and Biosystems EngineeringChonnam National UniversityGwangjuRepublic of Korea,Interdisciplinary Program in IT‐Bio Convergence SystemChonnam National UniversityGwangjuRepublic of Korea
| | - Sunho Park
- Department of Convergence Biosystems EngineeringChonnam National UniversityGwangjuRepublic of Korea,Department of Rural and Biosystems EngineeringChonnam National UniversityGwangjuRepublic of Korea,Interdisciplinary Program in IT‐Bio Convergence SystemChonnam National UniversityGwangjuRepublic of Korea
| | - Yang‐Kyung Kim
- Department of Physical and Rehabilitation MedicineChonnam National University Medical School & HospitalGwangjuRepublic of Korea
| | - Hyoseong Kim
- Department of Convergence Biosystems EngineeringChonnam National UniversityGwangjuRepublic of Korea,Department of Rural and Biosystems EngineeringChonnam National UniversityGwangjuRepublic of Korea,Interdisciplinary Program in IT‐Bio Convergence SystemChonnam National UniversityGwangjuRepublic of Korea
| | - Myung‐Sun Kim
- Department of Orthopaedic Surgery, Chonnam National University Medical School & HospitalGwangjuRepublic of Korea
| | - Jangho Kim
- Department of Convergence Biosystems EngineeringChonnam National UniversityGwangjuRepublic of Korea,Department of Rural and Biosystems EngineeringChonnam National UniversityGwangjuRepublic of Korea,Interdisciplinary Program in IT‐Bio Convergence SystemChonnam National UniversityGwangjuRepublic of Korea,Institute of Nano‐Stem Cells Therapeutics, NANOBIOSYSTEM Co., LtdGwangjuRepublic of Korea
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Mirkiani S, Roszko DA, O'Sullivan C, Faridi P, Hu DS, Fang D, Everaert DG, Toossi A, Konrad PE, Robinson K, Mushahwar VK. Overground gait kinematics and muscle activation patterns in the Yucatan mini pig. J Neural Eng 2022; 19. [PMID: 35172283 DOI: 10.1088/1741-2552/ac55ac] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 02/16/2022] [Indexed: 11/12/2022]
Abstract
Objective The objectives of this study were to assess gait biomechanics and the effect of overground walking speed on gait parameters, kinematics, and electromyographic (EMG) activity in the hindlimb muscles of Yucatan Minipigs (YMPs). Approach Nine neurologically-intact, adult YMPs were trained to walk overground in a straight line. Whole-body kinematics and EMG activity of hindlimb muscles were recorded and analyzed at 6 different speed ranges (0.4-0.59, 0.6-0.79, 0.8-0.99, 1.0-1.19, 1.2-1.39, and 1.4-1.6 m/s). A MATLAB program was developed to detect strides and gait events automatically from motion-captured data. The kinematics and EMG activity were analyzed for each stride based on the detected events. Main results Significant decreases in stride duration, stance and swing times and an increase in stride length were observed with increasing speed. A transition in gait pattern occurred at the 1.0m/s walking speed. Significant increases in the range of motion of the knee and ankle joints were observed at higher speeds. Also, the points of minimum and maximum joint angles occurred earlier in the gait cycle as the walking speed increased. The onset of EMG activity in the biceps femoris muscle occurred significantly earlier in the gait cycle with increasing speed. Significance YMPs are becoming frequently used as large animal models for preclinical testing and translation of novel interventions to humans. A comprehensive characterization of overground walking in neurologically-intact YMPs is provided in this study. These normative measures set the basis against which the effects of future interventions on locomotor capacity in YMPs can be compared.
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Affiliation(s)
- Soroush Mirkiani
- Neuroscience & Mental Health Institute and Sensory Motor Adaptive Rehabilitation Technology (SMART) Network, University of Alberta, 5005 Katz Building, University of Alberta, Edmonton, Alberta, T6G 2R3, CANADA
| | - David A Roszko
- Neuroscience & Mental Health Institute and Sensory Motor Adaptive Rehabilitation Technology (SMART) Network, University of Alberta, 5005 Katz Building, Edmonton, Alberta, T6G 2R3, CANADA
| | - Carly O'Sullivan
- Neuroscience & Mental Health Institute and Sensory Motor Adaptive Rehabilitation Technology (SMART) Network, University of Alberta, 5005 Katz, Building, Edmonton, Alberta, T6G 2R3, CANADA
| | - Pouria Faridi
- Neuroscience & Mental Health Institute and Sensory Motor Adaptive Rehabilitation Technology (SMART) Network, University of Alberta, 5005 Katz Building, Edmonton, Alberta, T6G 2R3, CANADA
| | - David S Hu
- Department of Medicine and Sensory Motor Adaptive Rehabilitation Technology (SMART) Network, University of Alberta, 5005 Katz Building, Edmonton, Alberta, T6G 2R3, CANADA
| | - Daniel Fang
- Sensory Motor Adaptive Rehabilitation Technology (SMART) Network, University of Alberta, 5005 Katz Building, Edmonton, Alberta, T6G 2R3, CANADA
| | - Dirk G Everaert
- Department of Medicine and Sensory Motor Adaptive Rehabilitation Technology (SMART) Network, University of Alberta, 5005 Katz Building, Edmonton, Alberta, T6G 2R3, CANADA
| | - Amirali Toossi
- Neuroscience & Mental Health Institute and Sensory Motor Adaptive Rehabilitation Technology (SMART) Network, University of Alberta, 5005 Katz Building, Edmonton, Alberta, T6G 2R3, CANADA
| | - Peter E Konrad
- Department of Neurosurgery, West Virginia University, PO Box 9183, Morgantown, West Virginia, 26506, UNITED STATES
| | - Kevin Robinson
- School of Physical Therapy, Belmont University, 341 McWhorter Hall, Nashville, Tennessee, 37212, UNITED STATES
| | - Vivian K Mushahwar
- Department of Medicine and Sensory Motor Adaptive Rehabilitation Technology (SMART) Network, University of Alberta, 5005 Katz Building, University of Alberta, Edmonton, Alberta, T6G 2R3, CANADA
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Xue W, Fu Y, Zhang H, Li G, Cao P, Li Y, Peng Q, Zhong K, Feng S, Gao Y. A novel, simplified, and reproducible porcine model of acute ischemic liver failure with portal vein preservation. Exp Anim 2022; 71:60-70. [PMID: 34497163 PMCID: PMC8828402 DOI: 10.1538/expanim.21-0076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 08/13/2021] [Indexed: 11/25/2022] Open
Abstract
The current ischemic models of liver failure are difficult and usually time-consuming to produce. The aim of this study was to develop a simplified and reproducible porcine model of acute liver failure for use in preclinical research. Eighteen Bama miniature pigs were randomly divided into Groups A, B, and C. The hepatic artery and common bile duct were ligated in all groups. While the portal vein was completely preserved in Group A, it was narrowed by 1/3 and 1/2 in Groups B and C, respectively. Results of biochemical analyses, encephalopathy scores, and survival times were compared among the groups. Results of hematoxylin-eosin staining, terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling, Masson staining, and Ki-67 analyses were recorded. Survival times in Groups B and C were 11.67 ± 1.86 and 2.16 ± 0.75 days, respectively, shorter than that in Group A (>15 days). Following surgery, alanine aminotransferase, aspartate aminotransferase, lactate dehydrogenase, alkaline phosphatase, total bilirubin, and direct bilirubin levels significantly increased relative to baseline values in all groups (P<0.05). Groups B and C exhibited a significant decrease in encephalopathy scores and a significant increase in ammonia levels, which were negatively correlated with one another. Pathological analysis revealed obvious necrosis of liver cells, which correlated closely with the degree of portal vein constriction. Our simple, highly reproducible model effectively mimics the clinical characteristics of acute liver failure in humans and provides a foundation for further research on artificial liver support system development.
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Affiliation(s)
- Weisong Xue
- General Surgery Center, Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, No. 253, Gongye Road, Haizhu District, Guangzhou 510280, Guangdong Province, P.R. China
| | - Yu Fu
- General Surgery Center, Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, No. 253, Gongye Road, Haizhu District, Guangzhou 510280, Guangdong Province, P.R. China
| | - Haojie Zhang
- General Surgery Center, Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, No. 253, Gongye Road, Haizhu District, Guangzhou 510280, Guangdong Province, P.R. China
| | - Guoping Li
- Beijing Grand Lifescience & technology, Ltd., No. 8, Shengmingyuan Road, Changping District, Beijing 100000, P.R. China
| | - Peihua Cao
- Clinical Research Center, Zhujiang Hospital, Southern Medical University, No. 253, Gongye Road, Haizhu District, Guangzhou 510280, Guangdong Province, P.R. China
| | - Yang Li
- General Surgery Center, Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, No. 253, Gongye Road, Haizhu District, Guangzhou 510280, Guangdong Province, P.R. China
| | - Qing Peng
- General Surgery Center, Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, No. 253, Gongye Road, Haizhu District, Guangzhou 510280, Guangdong Province, P.R. China
| | - Kebo Zhong
- General Surgery Center, Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, No. 253, Gongye Road, Haizhu District, Guangzhou 510280, Guangdong Province, P.R. China
| | - Shuangtang Feng
- Beijing Grand Lifescience & technology, Ltd., No. 8, Shengmingyuan Road, Changping District, Beijing 100000, P.R. China
| | - Yi Gao
- General Surgery Center, Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital, Southern Medical University, No. 253, Gongye Road, Haizhu District, Guangzhou 510280, Guangdong Province, P.R. China
- State Key Laboratory of Organ Failure Research, Southern Medical University, No. 1023, Shatai Road, Baiyun District, Guangzhou 510050, Guangdong Province, P.R. China
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Zhang Y, Li M, Yu B, Lu S, Zhang L, Zhu S, Yu Z, Xia T, Huang H, Jiang W, Zhang S, Sun L, Ye Q, Sun J, Zhu H, Huang P, Hong H, Yu S, Li W, Ai D, Fan J, Li W, Song H, Xu L, Chen X, Chen T, Zhou M, Ou J, Yang J, Li W, Hu Y, Wu W. Cold protection allows local cryotherapy in a clinical-relevant model of traumatic optic neuropathy. eLife 2022; 11:75070. [PMID: 35352678 PMCID: PMC9068221 DOI: 10.7554/elife.75070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 03/29/2022] [Indexed: 11/24/2022] Open
Abstract
Therapeutic hypothermia (TH) is potentially an important therapy for central nervous system (CNS) trauma. However, its clinical application remains controversial, hampered by two major factors: (1) Many of the CNS injury sites, such as the optic nerve (ON), are deeply buried, preventing access for local TH. The alternative is to apply TH systemically, which significantly limits the applicable temperature range. (2) Even with possible access for 'local refrigeration', cold-induced cellular damage offsets the benefit of TH. Here we present a clinically translatable model of traumatic optic neuropathy (TON) by applying clinical trans-nasal endoscopic surgery to goats and non-human primates. This model faithfully recapitulates clinical features of TON such as the injury site (pre-chiasmatic ON), the spatiotemporal pattern of neural degeneration, and the accessibility of local treatments with large operating space. We also developed a computer program to simplify the endoscopic procedure and expand this model to other large animal species. Moreover, applying a cold-protective treatment, inspired by our previous hibernation research, enables us to deliver deep hypothermia (4 °C) locally to mitigate inflammation and metabolic stress (indicated by the transcriptomic changes after injury) without cold-induced cellular damage, and confers prominent neuroprotection both structurally and functionally. Intriguingly, neither treatment alone was effective, demonstrating that in situ deep hypothermia combined with cold protection constitutes a breakthrough for TH as a therapy for TON and other CNS traumas.
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Affiliation(s)
- Yikui Zhang
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Mengyun Li
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Bo Yu
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Shengjian Lu
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Lujie Zhang
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of TechnologyBeijingChina
| | - Senmiao Zhu
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Zhonghao Yu
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Tian Xia
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Haoliang Huang
- Department of Ophthalmology, Stanford University School of MedicinePalo AltoUnited States
| | - WenHao Jiang
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Si Zhang
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Lanfang Sun
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Qian Ye
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Jiaying Sun
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Hui Zhu
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Pingping Huang
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Huifeng Hong
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Shuaishuai Yu
- School of Laboratory Medicine and Life Sciences, Wenzhou Medical UniversityWenzhouChina
| | - Wenjie Li
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of TechnologyBeijingChina
| | - Danni Ai
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of TechnologyBeijingChina
| | - Jingfan Fan
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of TechnologyBeijingChina
| | - Wentao Li
- School of Computer Science & Technology, Beijing Institute of TechnologyBeijingChina
| | - Hong Song
- School of Computer Science & Technology, Beijing Institute of TechnologyBeijingChina
| | - Lei Xu
- Medical Radiology Department, 2nd Affiliated Hospital, Wenzhou Medical UniversityWenzhouChina
| | - Xiwen Chen
- Animal Facility Center, Wenzhou Medical UniversityWenzhouChina
| | - Tongke Chen
- Animal Facility Center, Wenzhou Medical UniversityWenzhouChina
| | - Meng Zhou
- School of Biomedical Engineering, The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
| | - Jingxing Ou
- Department of Hepatic Surgery and Liver Transplantation Center of the Third Affiliated, Hospital, Guangdong Province Engineering Laboratory for Transplantation MedicineGuangzhouChina,Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouChina
| | - Jian Yang
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of TechnologyBeijingChina
| | - Wei Li
- Retinal Neurophysiology Section, National Eye Institute, National Institute of Health, NIHBethesdaUnited States
| | - Yang Hu
- Department of Ophthalmology, Stanford University School of MedicinePalo AltoUnited States
| | - Wencan Wu
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical UniversityWenzhouChina
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Li N, Ferracane J, Andeen N, Lewis S, Woltjer R, Rugonyi S, Jahangiri Y, Uchida B, Farsad K, Kaufman JA, Al-Hakim R. Endovascular Venous Stenosis and Thrombosis Large Animal Model: angiographic, histological, and biomechanical characterization. J Vasc Interv Radiol 2021; 33:255-261.e2. [PMID: 34915165 DOI: 10.1016/j.jvir.2021.10.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 09/20/2021] [Accepted: 10/03/2021] [Indexed: 10/19/2022] Open
Abstract
PURPOSE Characterize an ovine endovascular radiofrequency ablation based venous stenosis and thrombosis model for studying venous biomechanics and response to intervention. MATERIALS AND METHODS Unilateral short-segment (n= 2) or long-segment (n = 6) iliac vein stenoses were created in eight adult sheep using an endovenous radiofrequency (RF) ablation technique. Angiographic assessment was performed at baseline, immediately after venous stenosis creation, and after 2-week (n = 6) or 3-month (n = 2) survival. Stenosed iliac veins and contralateral healthy controls were harvested for histological and biomechanical assessment. RESULTS At follow-up, the short-segment RF ablation group showed stable stenosis without occlusion. The long-segment group showed complete venous occlusion/thrombosis with formation of collateral veins. Stenosed veins showed significant wall thickening (0.28 mm vs 0.16 mm; p = 0.0175) and confluent collagen deposition compared to healthy controls. Subacute non-adherent thrombi were apparent at 2 weeks, which were replaced by fibrous luminal obliteration with channels of recanalization at 3 months. Stenosed veins demonstrated increased longitudinal stiffness (448.5 ± 5.4 kPa vs. 314.6 ± 1.5 kPa, p < 0.0001) and decreased circumferential stiffness (140.8 ± 2.6 kPa vs. 246.0 ± 1.6 kPa, p < 0.0001) compared to healthy controls. CONCLUSION Endovenous radiofrequency ablation is a reliable technique for creating venous stenosis and thrombosis in a large animal model with histological and biomechanical attributes similar to those seen in humans. This platform can facilitate understanding of venous biomechanics and testing of venous specific devices and interventions.
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Affiliation(s)
- Ningcheng Li
- Dotter Interventional Institute, Oregon Health & Science University
| | - Jack Ferracane
- School of Dentistry, Oregon Health & Science University; Biomaterials and Biomechanics, Oregon Health & Science University
| | | | - Steven Lewis
- School of Dentistry, Oregon Health & Science University; Biomaterials and Biomechanics, Oregon Health & Science University
| | | | - Sandra Rugonyi
- Biomedical Engineering, Oregon Health & Science University
| | - Younes Jahangiri
- Dotter Interventional Institute, Oregon Health & Science University
| | - Barry Uchida
- Dotter Interventional Institute, Oregon Health & Science University
| | - Khashayar Farsad
- Dotter Interventional Institute, Oregon Health & Science University
| | - John A Kaufman
- Dotter Interventional Institute, Oregon Health & Science University
| | - Ramsey Al-Hakim
- Dotter Interventional Institute, Oregon Health & Science University.
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42
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Mckean NE, Handley RR, Snell RG. A Review of the Current Mammalian Models of Alzheimer's Disease and Challenges That Need to Be Overcome. Int J Mol Sci 2021; 22:13168. [PMID: 34884970 PMCID: PMC8658123 DOI: 10.3390/ijms222313168] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/30/2021] [Accepted: 12/02/2021] [Indexed: 01/04/2023] Open
Abstract
Alzheimer's disease (AD) is one of the looming health crises of the near future. Increasing lifespans and better medical treatment for other conditions mean that the prevalence of this disease is expected to triple by 2050. The impact of AD includes both the large toll on individuals and their families as well as a large financial cost to society. So far, we have no way to prevent, slow, or cure the disease. Current medications can only alleviate some of the symptoms temporarily. Many animal models of AD have been created, with the first transgenic mouse model in 1995. Mouse models have been beset by challenges, and no mouse model fully captures the symptomatology of AD without multiple genetic mutations and/or transgenes, some of which have never been implicated in human AD. Over 25 years later, many mouse models have been given an AD-like disease and then 'cured' in the lab, only for the treatments to fail in clinical trials. This review argues that small animal models are insufficient for modelling complex disorders such as AD. In order to find effective treatments for AD, we need to create large animal models with brains and lifespan that are closer to humans, and underlying genetics that already predispose them to AD-like phenotypes.
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Affiliation(s)
- Natasha Elizabeth Mckean
- Applied Translational Genetics Group, School of Biological Sciences, University of Auckland, 3a Symonds Street, Auckland 1010, New Zealand; (N.E.M.); (R.R.H.)
- Centre for Brain Research, Faculty of Medical and Health Sciences, University of Auckland, Auckland 1010, New Zealand
| | - Renee Robyn Handley
- Applied Translational Genetics Group, School of Biological Sciences, University of Auckland, 3a Symonds Street, Auckland 1010, New Zealand; (N.E.M.); (R.R.H.)
- Centre for Brain Research, Faculty of Medical and Health Sciences, University of Auckland, Auckland 1010, New Zealand
| | - Russell Grant Snell
- Applied Translational Genetics Group, School of Biological Sciences, University of Auckland, 3a Symonds Street, Auckland 1010, New Zealand; (N.E.M.); (R.R.H.)
- Centre for Brain Research, Faculty of Medical and Health Sciences, University of Auckland, Auckland 1010, New Zealand
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43
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Mason NJ, Chester N, Xiong A, Rotolo A, Wu Y, Yoshimoto S, Glassman P, Gulendran G, Siegel DL. Development of a fully canine anti-canine CTLA4 monoclonal antibody for comparative translational research in dogs with spontaneous tumors. MAbs 2021; 13:2004638. [PMID: 34856888 PMCID: PMC8726733 DOI: 10.1080/19420862.2021.2004638] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The immune checkpoint inhibitor (ICI) ipilimumab has revolutionized the treatment of patients with different cancer histologies, including melanoma, renal cell carcinoma, and non-small cell lung carcinoma. However, only a subset of patients shows dramatic clinical responses to treatment. Despite intense biomarker discovery efforts linked to clinical trials using CTLA4 checkpoint blockade, no single prognostic correlate has emerged as a valid predictor of outcome. Client-owned, immune competent, pet dogs develop spontaneous tumors that exhibit similar features to human cancers, including shared chromosome aberrations, molecular subtypes, immune signatures, tumor heterogeneity, metastatic behavior, and response to chemotherapy. As such, they represent a valuable parallel patient population in which to investigate novel predictive biomarkers and rational therapeutic ICI combinations. However, the lack of validated, non-immunogenic, canine ICIs for preclinical use hinders this comparative approach. To address this, fully canine single-chain variable fragments (scFvs) that bind canine CTLA4 were isolated from a comprehensive canine scFv phage display library. A lead candidate for clinical development was selected based on its subnanomolar binding affinity to canine CTLA4 and its ability to prevent CTLA4 binding to CD80/CD86 and promote T cell proliferation and effector function. In vivo mouse studies revealed pharmacokinetics similar to isotype control IgG with no evidence of short-term adverse effects. This work paves the way for in vivo analysis of the first fully canine, anti-canine CTLA4 antibody to promote anti-tumor immunity in dogs with immune-responsive cancers and provide an important comparative tool to investigate correlative biomarkers of response and mechanisms of resistance to CTLA4 checkpoint inhibition.
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Affiliation(s)
- Nicola J Mason
- Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Center for Cellular Immunotherapy, Department of Pathology and Laboratory Medicine, School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | | | - Ailian Xiong
- Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Antonia Rotolo
- Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Ying Wu
- Department of Immunobiology, Yale University, New Haven, CT, USA
| | - Sho Yoshimoto
- Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Laboratory of Small Animal Surgery, Department of Veterinary Medicine, School of Veterinary Medicine, Azabu University, Kanagawa, Japan
| | - Patrick Glassman
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Gayathri Gulendran
- Department of Pathology and Laboratory Medicine, School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Don L Siegel
- Center for Cellular Immunotherapy, Department of Pathology and Laboratory Medicine, School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Pathology and Laboratory Medicine, School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
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44
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Echigoya Y, Trieu N, Duddy W, Moulton HM, Yin H, Partridge TA, Hoffman EP, Kornegay JN, Rohret FA, Rogers CS, Yokota T. A Dystrophin Exon-52 Deleted Miniature Pig Model of Duchenne Muscular Dystrophy and Evaluation of Exon Skipping. Int J Mol Sci 2021; 22:13065. [PMID: 34884867 DOI: 10.3390/ijms222313065] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/24/2021] [Accepted: 11/25/2021] [Indexed: 12/12/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is a lethal X-linked recessive disorder caused by mutations in the DMD gene and the subsequent lack of dystrophin protein. Recently, phosphorodiamidate morpholino oligomer (PMO)-antisense oligonucleotides (ASOs) targeting exon 51 or 53 to reestablish the DMD reading frame have received regulatory approval as commercially available drugs. However, their applicability and efficacy remain limited to particular patients. Large animal models and exon skipping evaluation are essential to facilitate ASO development together with a deeper understanding of dystrophinopathies. Using recombinant adeno-associated virus-mediated gene targeting and somatic cell nuclear transfer, we generated a Yucatan miniature pig model of DMD with an exon 52 deletion mutation equivalent to one of the most common mutations seen in patients. Exon 52-deleted mRNA expression and dystrophin deficiency were confirmed in the skeletal and cardiac muscles of DMD pigs. Accordingly, dystrophin-associated proteins failed to be recruited to the sarcolemma. The DMD pigs manifested early disease onset with severe bodywide skeletal muscle degeneration and with poor growth accompanied by a physical abnormality, but with no obvious cardiac phenotype. We also demonstrated that in primary DMD pig skeletal muscle cells, the genetically engineered exon-52 deleted pig DMD gene enables the evaluation of exon 51 or 53 skipping with PMO and its advanced technology, peptide-conjugated PMO. The results show that the DMD pigs developed here can be an appropriate large animal model for evaluating in vivo exon skipping efficacy.
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45
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McCook O, Scheuerle A, Denoix N, Kapapa T, Radermacher P, Merz T. Localization of the hydrogen sulfide and oxytocin systems at the depth of the sulci in a porcine model of acute subdural hematoma. Neural Regen Res 2021; 16:2376-2382. [PMID: 33907009 PMCID: PMC8374554 DOI: 10.4103/1673-5374.313018] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 11/17/2020] [Accepted: 12/10/2020] [Indexed: 11/24/2022] Open
Abstract
In the porcine model discussed in this review, the acute subdural hematoma was induced by subdural injection of autologous blood over the left parietal cortex, which led to a transient elevation of the intracerebral pressure, measured by bilateral neuromonitoring. The hematoma-induced brain injury was associated with albumin extravasation, oxidative stress, reactive astrogliosis and microglial activation in the ipsilateral hemisphere. Further proteins and injury markers were validated to be used for immunohistochemistry of porcine brain tissue. The cerebral expression patterns of oxytocin, oxytocin receptor, cystathionine-γ-lyase and cystathionine-β-synthase were particularly interesting: these four proteins all co-localized at the base of the sulci, where pressure-induced brain injury elicits maximum stress. In this context, the pig is a very relevant translational model in contrast to the rodent brain. The structure of the porcine brain is very similar to the human: the presence of gyri and sulci (gyrencephalic brain), white matter to grey matter proportion and tentorium cerebelli. Thus, pressure-induced injury in the porcine brain, unlike in the rodent brain, is reflective of the human pathophysiology.
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Affiliation(s)
- Oscar McCook
- Institute for Anesthesiological Pathophysiology and Process Engineering, Ulm University Medical Center, Ulm, Germany
| | - Angelika Scheuerle
- Department of Neuropathology, Ulm University Medical Center, Günzburg, Germany
| | - Nicole Denoix
- Institute for Anesthesiological Pathophysiology and Process Engineering, Ulm University Medical Center, Ulm, Germany
- Clinic for Psychosomatic Medicine and Psychotherapy, Ulm University Medical Center, Ulm, Germany
| | - Thomas Kapapa
- Department of Neurosurgery, Ulm University Medical Center, Ulm, Germany
| | - Peter Radermacher
- Institute for Anesthesiological Pathophysiology and Process Engineering, Ulm University Medical Center, Ulm, Germany
| | - Tamara Merz
- Institute for Anesthesiological Pathophysiology and Process Engineering, Ulm University Medical Center, Ulm, Germany
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Ramm R, Goecke T, Köhler P, Tudorache I, Cebotari S, Ciubotaru A, Sarikouch S, Höffler K, Bothe F, Petersen B, Haverich A, Niemann H, Hilfiker A. Immunological and functional features of decellularized xenogeneic heart valves after transplantation into GGTA1-KO pigs. Regen Biomater 2021; 8:rbab036. [PMID: 35928180 PMCID: PMC8329474 DOI: 10.1093/rb/rbab036] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 05/27/2021] [Accepted: 06/11/2021] [Indexed: 07/22/2023] Open
Abstract
Decellularization of xenogeneic heart valves might lead to excellent regenerative implants, from which many patients could benefit. However, this material carries various xenogeneic epitopes and thus bears a considerable inherent immunological risk. Here, we investigated the regenerative and immunogenic potential of xenogeneic decellularized heart valve implants using pigs deficient for the galactosyltransferase gene (GGTA1-KO) as novel large animal model. Decellularized aortic and pulmonary heart valves obtained from sheep, wild-type pigs or GGTA1-KO pigs were implanted into GGTA1-KO pigs for 3, or 6 months, respectively. Explants were analyzed histologically, immunhistologically (CD3, CD21 and CD172a) and anti-αGal antibody serum titers were determined by ELISA. Xenogeneic sheep derived implants exhibited a strong immune reaction upon implantation into GGTA1-KO pigs, characterized by massive inflammatory cells infiltrates, presence of foreign body giant cells, a dramatic increase of anti-αGal antibody titers and ultimately destruction of the graft, whereas wild-type porcine grafts induced only a mild reaction in GGTA1-KO pigs. Allogeneic implants, wild-type/wild-type and GGTA1-KO/GGTA1-KO valves did not induce a measurable immune reaction. Thus, GGTA1-KO pigs developed a 'human-like' immune response toward decellularized xenogeneic implants showing that immunogenicity of xenogeneic implants is not sufficiently reduced by decellularization, which detracts from their regenerative potential.
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Affiliation(s)
- Robert Ramm
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
| | - Tobias Goecke
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
| | - Peter Köhler
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Hoeltystr. 10, 31535 Mariensee/Neustadt am Ruebenberge, Germany
| | - Igor Tudorache
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
| | - Serghei Cebotari
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
| | - Anatol Ciubotaru
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
| | - Samir Sarikouch
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
| | - Klaus Höffler
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
| | | | - Björn Petersen
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Hoeltystr. 10, 31535 Mariensee/Neustadt am Ruebenberge, Germany
| | - Axel Haverich
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
| | - Heiner Niemann
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Hoeltystr. 10, 31535 Mariensee/Neustadt am Ruebenberge, Germany
| | - Andres Hilfiker
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg Str. 1, Hannover 30625, Germany
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Bentsen S, Clemmensen A, Loft M, Flethøj M, Debes KP, Ludvigsen TP, Larsen CB, Kirchhoff J, Olsen LH, Møller JE, Andersen TL, Johannesen HH, Jespersen T, Kjaer A. [ 68Ga]Ga-NODAGA-E[(cRGDyK)] 2 Angiogenesis PET/MR in a Porcine Model of Chronic Myocardial Infarction. Diagnostics (Basel) 2021; 11:1807. [PMID: 34679505 DOI: 10.3390/diagnostics11101807] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/23/2021] [Accepted: 09/27/2021] [Indexed: 11/24/2022] Open
Abstract
Angiogenesis is crucial in tissue repair and prevents scar tissue formation following an ischemic event such as myocardial infarction. The ischemia induces formation of new capillaries, which have high expression of integrin αvβ3. [68Ga]Ga-NODAGA-E[(cRGDyK)]2 ([68Ga]Ga-RGD) is a promising PET-radiotracer reflecting angiogenesis by binding to integrin αvβ3. A Göttingen mini-pig underwent transient catheter-induced left anterior descending artery (LAD) occlusion for 120 min, and after 8 weeks was imaged on a Siemens mMR 3T PET/MR system. A large antero-septal infarction was evident by late gadolinium enhancement (LGE) on the short axis and 2–4 chamber views. The infarcted area corresponded to the area with high [68Ga]Ga-RGD uptake on the fused PET/MR images, with no uptake in the healthy myocardium. To support the hypothesis that [68Ga]Ga-RGD uptake reflects angiogenesis, biopsies were sampled from the infarct border and healthy myocardium. Expression of αvβ3 was evaluated using immunohistochemistry. The staining showed higher αvβ3 expression in the capillaries of the infarct border compared to those in the healthy myocardium. These initial data confirm in vivo detection of angiogenesis using [68Ga]Ga-RGD PET in a translational model, which overall support the method applicability when evaluating novel cardio-protective therapies.
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Rghei AD, van Lieshout LP, McLeod BM, Pei Y, Lopes JA, Zielinska N, Baracuhy EM, Stevens BAY, Thomas SP, Yates JGE, Warner BM, Kobasa D, Fausther-Bovendo H, Kobinger GP, Karimi K, Thompson B, Bridle BW, Susta L, Wootton SK. Safety and Tolerability of the Adeno-Associated Virus Vector, AAV6.2FF, Expressing a Monoclonal Antibody in Murine and Ovine Animal Models. Biomedicines 2021; 9:biomedicines9091186. [PMID: 34572372 PMCID: PMC8464737 DOI: 10.3390/biomedicines9091186] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/03/2021] [Accepted: 09/07/2021] [Indexed: 12/18/2022] Open
Abstract
Adeno-associated virus (AAV) vector mediated expression of therapeutic monoclonal antibodies is an alternative strategy to traditional vaccination to generate immunity in immunosuppressed or immunosenescent individuals. In this study, we vectorized a human monoclonal antibody (31C2) directed against the spike protein of SARS-CoV-2 and determined the safety profile of this AAV vector in mice and sheep as a large animal model. In both studies, plasma biochemical parameters and hematology were comparable to untreated controls. Except for mild myositis at the site of injection, none of the major organs revealed any signs of toxicity. AAV-mediated human IgG expression increased steadily throughout the 28-day study in sheep, resulting in peak concentrations of 21.4–46.7 µg/ mL, demonstrating practical scale up from rodent to large animal models. This alternative approach to immunity is worth further exploration after this demonstration of safety, tolerability, and scalability in a large animal model.
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Affiliation(s)
- Amira D. Rghei
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Laura P. van Lieshout
- Avamab Pharma Inc., 120, 4838 Richard Road SW, Calgary, AB T3E 6L1, Canada; (L.P.v.L.); (B.T.)
| | - Benjamin M. McLeod
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Yanlong Pei
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Jordyn A. Lopes
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Nicole Zielinska
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Enzo M. Baracuhy
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Brenna A. Y. Stevens
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Sylvia P. Thomas
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Jacob G. E. Yates
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Bryce M. Warner
- Zoonotic Diseases and Special Pathogens, Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada; (B.M.W.); (D.K.)
| | - Darwyn Kobasa
- Zoonotic Diseases and Special Pathogens, Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada; (B.M.W.); (D.K.)
| | - Hugues Fausther-Bovendo
- Département de Microbiologie-Infectiologie et D’immunologie, Université Laval, Quebec City, QC G1V 0A6, Canada; (H.F.-B.); (G.P.K.)
| | - Gary P. Kobinger
- Département de Microbiologie-Infectiologie et D’immunologie, Université Laval, Quebec City, QC G1V 0A6, Canada; (H.F.-B.); (G.P.K.)
| | - Khalil Karimi
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Brad Thompson
- Avamab Pharma Inc., 120, 4838 Richard Road SW, Calgary, AB T3E 6L1, Canada; (L.P.v.L.); (B.T.)
| | - Byram W. Bridle
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Leonardo Susta
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
| | - Sarah K. Wootton
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.D.R.); (B.M.M.); (Y.P.); (J.A.L.); (N.Z.); (E.M.B.); (B.A.Y.S.); (S.P.T.); (J.G.E.Y.); (K.K.); (B.W.B.); (L.S.)
- Correspondence: ; Tel.: +1-519-824-4120 (ext. 54729)
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Matar AJ, Crepeau RL, Mundinger GS, Cetrulo CL, Torabi R. Large Animal Models of Vascularized Composite Allotransplantation: A Review of Immune Strategies to Improve Allograft Outcomes. Front Immunol 2021; 12:664577. [PMID: 34276656 PMCID: PMC8278218 DOI: 10.3389/fimmu.2021.664577] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 06/07/2021] [Indexed: 11/23/2022] Open
Abstract
Over the past twenty years, significant technical strides have been made in the area of vascularized composite tissue allotransplantation (VCA). As in solid organ transplantation, the allogeneic immune response remains a significant barrier to long-term VCA survival and function. Strategies to overcome acute and chronic rejection, minimize immunosuppression and prolong VCA survival have important clinical implications. Historically, large animals have provided a valuable model for testing the clinical translatability of immune modulating approaches in transplantation, including tolerance induction, co-stimulation blockade, cellular therapies, and ex vivo perfusion. Recently, significant advancements have been made in these arenas utilizing large animal VCA models. In this comprehensive review, we highlight recent immune strategies undertaken to improve VCA outcomes with a focus on relevant preclinical large animal models.
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Affiliation(s)
- Abraham J Matar
- Department of Surgery, Emory University School of Medicine, Atlanta, GA, United States
| | - Rebecca L Crepeau
- Department of Surgery, Emory University School of Medicine, Atlanta, GA, United States
| | - Gerhard S Mundinger
- Department of Surgery, Division of Plastic and Reconstructive Surgery, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, LA, United States
| | - Curtis L Cetrulo
- Department of Surgery, Division of Plastic Surgery, Massachusetts General Hospital, Boston, MA, United States.,Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA, United States.,Shriner's Hospital for Children, Department of Plastic and Reconstructive Surgery, Boston, MA, United States
| | - Radbeh Torabi
- Department of Surgery, Division of Plastic and Reconstructive Surgery, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, LA, United States
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50
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Stærk K, Grønnemose RB, Palarasah Y, Kolmos HJ, Lund L, Alm M, Thomsen P, Andersen TE. A Novel Device-Integrated Drug Delivery System for Local Inhibition of Urinary Tract Infection. Front Microbiol 2021; 12:685698. [PMID: 34248906 PMCID: PMC8267894 DOI: 10.3389/fmicb.2021.685698] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/26/2021] [Indexed: 11/29/2022] Open
Abstract
Background: Catheter-associated urinary tract infection (CAUTI) is a frequent community-acquired infection and the most common nosocomial infection. Here, we developed a novel antimicrobial catheter concept that utilizes a silicone-based interpenetrating polymer network (IPN) as balloon material to facilitate a topical slow-release prophylaxis of antibacterial agents across the balloon to the urinary bladder. Methods: The balloon material was achieved by modifying low shore hardness silicone tubes with a hydrogel interpenetrating polymer in supercritical CO2 using the sequential method. Release properties and antibacterial efficacy of the IPN balloon treatment concept was investigated in vitro and in a porcine CAUTI model developed for the study. In the latter, Bactiguard Infection Protection (BIP) Foley catheters were also assessed to enable benchmark with the traditional antimicrobial coating principle. Results: Uropathogenic Escherichia coli was undetectable in urinary bladders and on retrieved catheters in the IPN treatment group as compared to control that revealed significant bacteriuria (>105 colony forming units/ml) as well as catheter-associated biofilm. The BIP catheters failed to prevent E. coli colonization of the bladder but significantly reduced catheter biofilm formation compared to the control. Conclusion: The IPN-catheter concept provides a novel, promising delivery route for local treatment in the urinary tract.
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Affiliation(s)
- Kristian Stærk
- Research Unit of Clinical Microbiology, University of Southern Denmark and Odense University Hospital, Odense, Denmark
| | - Rasmus Birkholm Grønnemose
- Research Unit of Clinical Microbiology, University of Southern Denmark and Odense University Hospital, Odense, Denmark
| | - Yaseelan Palarasah
- Department of Cancer and Inflammation Research, University of Southern Denmark, Odense, Denmark
| | - Hans Jørn Kolmos
- Research Unit of Clinical Microbiology, University of Southern Denmark and Odense University Hospital, Odense, Denmark
| | - Lars Lund
- Research Unit of Urology, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | | | | | - Thomas Emil Andersen
- Research Unit of Clinical Microbiology, University of Southern Denmark and Odense University Hospital, Odense, Denmark
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