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Onnis C, Muscogiuri G, Cademartiri F, Fanni D, Faa G, Gerosa C, Mannelli L, Suri JS, Sironi S, Montisci R, Saba L. Non-invasive coronary imaging in elderly population. Eur J Radiol 2023; 162:110794. [PMID: 37001255 DOI: 10.1016/j.ejrad.2023.110794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/16/2023] [Accepted: 03/20/2023] [Indexed: 03/29/2023]
Abstract
Age is a non-modifiable cardiovascular risk factor, which leads to development and progression of chronic conditions, such as coronary artery disease, by promoting atherosclerosis. Aging is responsible for morphological structure changes of the coronary arteries and specific atherosclerotic plaque features, which can be studied with non-invasive coronary imaging techniques, particularly coronary CT angiography. The aim of this review is to evaluate current knowledge on this technique applied to the elderly population, and to describe CAD manifestation and plaque features of coronary atherosclerosis in this particular set of patients. We also discuss the clinical implication of frailty assessment and customization of diagnostic strategies in order to shift the approach from disease-centered to patient-centered care.
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Chen J, Liu G, Sun W, Zheng Y, Jin J, Chen S, Yuan J, Gong H, Luo Q, Yang X. Three-dimensional visualization of heart-wide myocardial architecture and vascular network simultaneously at single-cell resolution. Front Cardiovasc Med 2022; 9:945198. [PMID: 35990991 PMCID: PMC9386161 DOI: 10.3389/fcvm.2022.945198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 07/18/2022] [Indexed: 11/13/2022] Open
Abstract
Obtaining various structures of the entire mature heart at single-cell resolution is highly desired in cardiac studies; however, effective methodologies are still lacking. Here, we propose a pipeline for labeling and imaging myocardial and vascular structures. In this pipeline, the myocardium is counterstained using fluorescent dyes and the cardiovasculature is labeled using transgenic markers. High-definition dual-color fluorescence micro-optical sectioning tomography is used to perform heart-wide tissue imaging, enabling the acquisition of whole-heart data at a voxel resolution of 0.32 × 0.32 × 1 μm3. Obtained structural data demonstrated the superiority of the pipeline. In particular, the three-dimensional morphology and spatial arrangement of reconstructed cardiomyocytes were revealed, and high-resolution vascular data helped determine differences in the features of endothelial cells and complex coiled capillaries. Our pipeline can be used in cardiac studies for examining the structures of the entire heart at the single-cell level.
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Affiliation(s)
- Jianwei Chen
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China,HUST-Suzhou Institute for Brainsmatics, Jiangsu Industrial Technology Research Institute (JITRI), Suzhou, China
| | - Guangcai Liu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
| | - Wen Sun
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
| | - Yuanfang Zheng
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Jin
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
| | - Siqi Chen
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Yuan
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China,HUST-Suzhou Institute for Brainsmatics, Jiangsu Industrial Technology Research Institute (JITRI), Suzhou, China
| | - Hui Gong
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China,HUST-Suzhou Institute for Brainsmatics, Jiangsu Industrial Technology Research Institute (JITRI), Suzhou, China,CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Science, Shanghai, China
| | - Qingming Luo
- School of Biomedical Engineering, Hainan University, Haikou, China
| | - Xiaoquan Yang
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China,HUST-Suzhou Institute for Brainsmatics, Jiangsu Industrial Technology Research Institute (JITRI), Suzhou, China,*Correspondence: Xiaoquan Yang
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3
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Karagiannidis E, Papazoglou AS, Sofidis G, Chatzinikolaou E, Keklikoglou K, Panteris E, Kartas A, Stalikas N, Zegkos T, Girtovitis F, Moysidis DV, Stefanopoulos L, Koupidis K, Hadjimiltiades S, Giannakoulas G, Arvanitidis C, Michaelson JS, Karvounis H, Sianos G. Micro-CT-Based Quantification of Extracted Thrombus Burden Characteristics and Association With Angiographic Outcomes in Patients With ST-Elevation Myocardial Infarction: The QUEST-STEMI Study. Front Cardiovasc Med 2021; 8:646064. [PMID: 33969012 PMCID: PMC8096895 DOI: 10.3389/fcvm.2021.646064] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 02/22/2021] [Indexed: 01/10/2023] Open
Abstract
Background: Angiographic detection of thrombus in STEMI is associated with adverse outcomes. However, routine thrombus aspiration failed to demonstrate the anticipated benefit. Hence, management of high coronary thrombus burden remains challenging. We sought to assess for the first time extracted thrombotic material characteristics utilizing micro-computed tomography (micro-CT). Methods: One hundred thirteen STEMI patients undergoing thrombus aspiration were enrolled. Micro-CT was undertaken to quantify retrieved thrombus volume, surface, and density. Correlation of these indices with angiographic and electrocardiographic outcomes was performed. Results: Mean aspirated thrombus volume, surface, and density (±standard deviation) were 15.71 ± 20.10 mm3, 302.89 ± 692.54 mm2, and 3139.04 ± 901.88 Hounsfield units, respectively. Aspirated volume and surface were significantly higher (p < 0.001) in patients with higher angiographic thrombus burden. After multivariable analysis, independent predictors for thrombus volume were reference vessel diameter (RVD) (p = 0.011), right coronary artery (RCA) (p = 0.039), and smoking (p = 0.027), whereas RVD (p = 0.018) and RCA (p = 0.019) were predictive for thrombus surface. Thrombus volume and surface were independently associated with distal embolization (p = 0.007 and p = 0.028, respectively), no-reflow phenomenon (p = 0.002 and p = 0.006, respectively), and angiographically evident residual thrombus (p = 0.007 and p = 0.002, respectively). Higher thrombus density was correlated with worse pre-procedural TIMI flow (p < 0.001). Patients with higher aspirated volume and surface developed less ST resolution (p = 0.042 and p = 0.023, respectively). Conclusions: Angiographic outcomes linked with worse prognosis were more frequent among patients with larger extracted thrombus. Despite retrieving larger thrombus load in these patients, current thrombectomy devices fail to deal with thrombotic material adequately. Further studies of novel thrombus aspiration technologies are warranted to improve patient outcomes. Clinical Trial Registration: QUEST-STEMI trial ClinicalTrials.gov number: NCT03429608 Date of registration: February 12, 2018. The study was prospectively registered.
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Affiliation(s)
- Efstratios Karagiannidis
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Andreas S Papazoglou
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Georgios Sofidis
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Evangelia Chatzinikolaou
- Hellenic Centre for Marine Research, Institute of Marine Biology, Biotechnology, and Aquaculture, Heraklion, Greece
| | - Kleoniki Keklikoglou
- Hellenic Centre for Marine Research, Institute of Marine Biology, Biotechnology, and Aquaculture, Heraklion, Greece.,Biology Department, University of Crete, Heraklion, Greece
| | - Eleftherios Panteris
- Laboratory of Forensic Medicine and Toxicology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Anastasios Kartas
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Nikolaos Stalikas
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Thomas Zegkos
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Dimitrios V Moysidis
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Leandros Stefanopoulos
- Lab of Computing, Medical Informatics, and Biomedical Imaging Technologies, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Kleanthis Koupidis
- School of Mathematics, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Stavros Hadjimiltiades
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - George Giannakoulas
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Christos Arvanitidis
- Hellenic Centre for Marine Research, Institute of Marine Biology, Biotechnology, and Aquaculture, Heraklion, Greece.,LifeWatch ERIC, Sector II-II, Seville, Spain
| | - James S Michaelson
- Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Haralambos Karvounis
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Georgios Sianos
- First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Willemink MJ, Varga-Szemes A, Schoepf UJ, Codari M, Nieman K, Fleischmann D, Mastrodicasa D. Emerging methods for the characterization of ischemic heart disease: ultrafast Doppler angiography, micro-CT, photon-counting CT, novel MRI and PET techniques, and artificial intelligence. Eur Radiol Exp 2021; 5:12. [PMID: 33763754 PMCID: PMC7991013 DOI: 10.1186/s41747-021-00207-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 01/22/2021] [Indexed: 12/24/2022] Open
Abstract
After an ischemic event, disruptive changes in the healthy myocardium may gradually develop and may ultimately turn into fibrotic scar. While these structural changes have been described by conventional imaging modalities mostly on a macroscopic scale-i.e., late gadolinium enhancement at magnetic resonance imaging (MRI)-in recent years, novel imaging methods have shown the potential to unveil an even more detailed picture of the postischemic myocardial phenomena. These new methods may bring advances in the understanding of ischemic heart disease with potential major changes in the current clinical practice. In this review article, we provide an overview of the emerging methods for the non-invasive characterization of ischemic heart disease, including coronary ultrafast Doppler angiography, photon-counting computed tomography (CT), micro-CT (for preclinical studies), low-field and ultrahigh-field MRI, and 11C-methionine positron emission tomography. In addition, we discuss new opportunities brought by artificial intelligence, while addressing promising future scenarios and the challenges for the application of artificial intelligence in the field of cardiac imaging.
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Affiliation(s)
- Martin J. Willemink
- grid.168010.e0000000419368956Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94035 USA
| | - Akos Varga-Szemes
- grid.259828.c0000 0001 2189 3475Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC USA
| | - U. Joseph Schoepf
- grid.259828.c0000 0001 2189 3475Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC USA
| | - Marina Codari
- grid.168010.e0000000419368956Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94035 USA
| | - Koen Nieman
- grid.168010.e0000000419368956Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA USA ,Stanford Cardiovascular Institute, Stanford, CA 94305 USA
| | - Dominik Fleischmann
- grid.168010.e0000000419368956Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94035 USA ,Stanford Cardiovascular Institute, Stanford, CA 94305 USA
| | - Domenico Mastrodicasa
- Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA, 94035, USA. .,Stanford Cardiovascular Institute, Stanford, CA, 94305, USA.
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5
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Leyssens L, Pestiaux C, Kerckhofs G. A Review of Ex Vivo X-ray Microfocus Computed Tomography-Based Characterization of the Cardiovascular System. Int J Mol Sci 2021; 22:3263. [PMID: 33806852 PMCID: PMC8004599 DOI: 10.3390/ijms22063263] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/17/2021] [Accepted: 03/18/2021] [Indexed: 12/27/2022] Open
Abstract
Cardiovascular malformations and diseases are common but complex and often not yet fully understood. To better understand the effects of structural and microstructural changes of the heart and the vasculature on their proper functioning, a detailed characterization of the microstructure is crucial. In vivo imaging approaches are noninvasive and allow visualizing the heart and the vasculature in 3D. However, their spatial image resolution is often too limited for microstructural analyses, and hence, ex vivo imaging is preferred for this purpose. Ex vivo X-ray microfocus computed tomography (microCT) is a rapidly emerging high-resolution 3D structural imaging technique often used for the assessment of calcified tissues. Contrast-enhanced microCT (CE-CT) or phase-contrast microCT (PC-CT) improve this technique by additionally allowing the distinction of different low X-ray-absorbing soft tissues. In this review, we present the strengths of ex vivo microCT, CE-CT and PC-CT for quantitative 3D imaging of the structure and/or microstructure of the heart, the vasculature and their substructures in healthy and diseased state. We also discuss their current limitations, mainly with regard to the contrasting methods and the tissue preparation.
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Affiliation(s)
- Lisa Leyssens
- Institute of Mechanics, Materials, and Civil Engineering, Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium; (L.L.); (C.P.)
- Institute of Experimental and Clinical Research, Université Catholique de Louvain, 1200 Woluwe-Saint-Lambert, Belgium
| | - Camille Pestiaux
- Institute of Mechanics, Materials, and Civil Engineering, Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium; (L.L.); (C.P.)
- Institute of Experimental and Clinical Research, Université Catholique de Louvain, 1200 Woluwe-Saint-Lambert, Belgium
| | - Greet Kerckhofs
- Institute of Mechanics, Materials, and Civil Engineering, Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium; (L.L.); (C.P.)
- Institute of Experimental and Clinical Research, Université Catholique de Louvain, 1200 Woluwe-Saint-Lambert, Belgium
- Department of Materials Engineering, Katholieke Universiteit Leuven, 3001 Leuven, Belgium
- Prometheus, Division of Skeletal Tissue Engineering, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
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Saffari TM, Mathot F, Thaler R, van Wijnen AJ, Bishop AT, Shin AY. Microcomputed analysis of nerve angioarchitecture after combined stem cell delivery and surgical angiogenesis to nerve allograft. J Plast Reconstr Aesthet Surg 2020; 74:1919-1930. [PMID: 33436338 DOI: 10.1016/j.bjps.2020.12.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 11/17/2020] [Accepted: 12/17/2020] [Indexed: 01/04/2023]
Abstract
INTRODUCTION A detailed three-dimensional (3D) evaluation of microvasculature is evolving to be a powerful tool, providing mechanistic understanding of angiomodulating strategies. The aim of this study was to evaluate the microvascular architecture of nerve allografts after combined stem cell delivery and surgical angiogenesis in a rat sciatic nerve defect model. MATERIALS AND METHODS In 25 Lewis rats, sciatic nerve gaps were repaired with (i) autografts, (ii) allografts, (iii) allografts wrapped in a pedicled superficial inferior epigastric artery fascia (SIEF) flap to provide surgical angiogenesis, combined with (iv) undifferentiated mesenchymal stem cells (MSC) and (v) MSCs differentiated into Schwann cell-like cells. At two weeks, vascular volume was measured using microcomputed tomography, and percentage and volume of vessels at different diameters were evaluated and compared with controls. RESULTS The vascular volume was significantly greatest in allografts treated with undifferentiated MSCs and surgical angiogenesis combined as compared to all experimental groups (P<0.01 as compared to autografts, P<0.0001 to allografts, and P<0.05 to SIEF and SIEF combined with differentiated MSCs, respectively). Volume and diameters of vessel segments in nerve allografts were enhanced by surgical angiogenesis. These distributions were further improved when surgical angiogenesis was combined with stem cells, with greatest increase found when combined with undifferentiated MSCs. CONCLUSIONS The interaction between vascularity and stem cells remains complex, however, this study provides some insight into its synergistic mechanisms. The combination of surgical angiogenesis with undifferentiated MSCs specifically, results in the greatest increase in revascularization, size of vessels, and stimulation of vessels to reach the middle longitudinal third of the nerve allograft.
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Affiliation(s)
- T M Saffari
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States; Department of Plastic-, Reconstructive- and Hand Surgery, Radboud University, Nijmegen, the Netherlands
| | - F Mathot
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States; Department of Plastic-, Reconstructive- and Hand Surgery, Radboud University, Nijmegen, the Netherlands
| | - R Thaler
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States
| | - A J van Wijnen
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States; Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN, United States
| | - A T Bishop
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States
| | - A Y Shin
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States.
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7
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Co-Registration of Peripheral Atherosclerotic Plaques Assessed by Conventional CT Angiography, MicroCT and Histology in Patients with Chronic Limb Threatening Ischaemia. Eur J Vasc Endovasc Surg 2020; 61:146-154. [PMID: 33187923 DOI: 10.1016/j.ejvs.2020.08.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 06/29/2020] [Accepted: 08/24/2020] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To co-register conventional computed tomography angiography (CTA), with ex vivo micro-computed tomography (microCT) and histology of popliteal atherosclerotic plaques. Improving the non-invasive imaging capabilities may be valuable to advance patient care with peripheral arterial obstructive disease towards lesion and individual based treatment. METHODS In this prospective observational study, 12 popliteal arteries from 11 symptomatic patients who had undergone transfemoral amputations for chronic limb threatening ischaemia and who had pre-operative CTA, were analysed ex vivo by microCT and histology. A total of 353 histological cross sections were co-registered with microCT and CTA, and classified as: lipid rich (LP, n = 26), fibrous (FP, n = 80), or calcific (CP, n = 247) plaques. CTA and microCT plaque density was calculated in 791 regions of interest as Hounsfield units (HU). RESULTS CTA and microCT could identify plaque components that were confirmed by histology such as fibrous tissue (FP), lipid pool/core (LP), and calcification (CP). MicroCT densities were 77.8 HU for FP (IQR 52.8, 129.5 HU), -28.4 HU for LP (IQR -87.1, 13.2 HU), and 3826.0 HU for CP (IQR 2989.0, 4501.0 HU). CTA densities of the three components of the plaque were: 78.0 HU for FP (IQR 59.5, 119.8 HU), 32.5 HU for LP (IQR 15.0, 42 HU), and 641.5 HU for CP (IQR 425.8, 1135 HU). The differences were statistically significant between the HU densitometric characteristics among the three groups (p < .0001) for both imaging modalities. Overall, microCT performed better diagnostically than conventional CTA for the three types of plaques: areas under the receiving operator characteristics curve were greater for microCT than CTA for FP (0.97 vs. 0.90), for LP (0.88 vs. 0.67), and for CP (0.97 vs. 0.90). CONCLUSION CTA and microCT can be used to identify histological atherosclerotic plaque components, with better diagnostic performance for microCT. This study demonstrates the feasibility of using microCT to assess plaque morphology lesions in a manner that approaches histology thus becoming a useful tool for ex vivo assessment of atherosclerosis and towards lesion based treatment.
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8
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Abstract
The quantitative analysis of blood vessel networks is an important component in many animal models of disease. We describe a nondestructive technique for blood vessel imaging that visualizes in situ vasculature in harvested tissues. The method allows for further analysis of the same tissues with histology and other methods that can be performed on fixed tissue. Consequently, it can easily be incorporated upstream to analysis methods to augment these with a three-dimensional reconstruction of the vascular network in the tissues to be analyzed. The method combines iodine-enhanced micro-computed tomography with a deep learning algorithm to segment vasculature within tissues. The procedure is relatively simple and can provide insight into complex changes in the vascular structure in the tissues.
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9
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Deng Y, Rowe KJ, Chaudhary KR, Yang A, Mei SHJ, Stewart DJ. Optimizing imaging of the rat pulmonary microvasculature by micro-computed tomography. Pulm Circ 2019; 9:2045894019883613. [PMID: 31700608 PMCID: PMC6823983 DOI: 10.1177/2045894019883613] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 09/24/2019] [Indexed: 12/14/2022] Open
Abstract
Micro-computed tomography (micro-CT) is used in pre-clinical research to generate high-resolution three-dimensional (3D) images of organs and tissues. When combined with intravascular contrast agents, micro-CT can provide 3D visualization and quantification of vascular networks in many different organs. However, the lungs present a particular challenge for contrast perfusion due to the complexity and fragile nature of the lung microcirculation. The protocol described here has been optimized to achieve consistent lung perfusion of the microvasculature to vessels < 20 microns in both normal and pulmonary arterial hypertension rats. High-resolution 3D micro-CT imaging can be used to better visualize changes in 3D architecture of the lung microcirculation in pulmonary vascular disease and to assess the impact of therapeutic strategies on microvascular structure in animal models of pulmonary arterial hypertension.
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Affiliation(s)
- Yupu Deng
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Canada
| | - Katelynn J Rowe
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Canada
| | - Ketul R Chaudhary
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Canada.,Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Canada
| | - Anli Yang
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Canada
| | - Shirley H J Mei
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Canada
| | - Duncan J Stewart
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Canada.,Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Canada.,Division of Cardiology, Department of Medicine, University of Ottawa, Ottawa, Canada
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10
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Burnett JC, Ma X, McKie PM. Myocardial Aging, the Cardiac Atria, and BNP: What Does it All Mean? J Am Coll Cardiol 2019; 74:1801-1803. [PMID: 31582140 DOI: 10.1016/j.jacc.2019.08.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Accepted: 08/18/2019] [Indexed: 11/16/2022]
Affiliation(s)
- John C Burnett
- Cardiorenal Research Laboratory, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota.
| | - Xiao Ma
- Cardiorenal Research Laboratory, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Paul M McKie
- Cardiorenal Research Laboratory, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
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11
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Kolesová H, Bartoš M, Hsieh WC, Olejníčková V, Sedmera D. Novel approaches to study coronary vasculature development in mice. Dev Dyn 2018; 247:1018-1027. [DOI: 10.1002/dvdy.24637] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 05/04/2018] [Accepted: 05/08/2018] [Indexed: 12/19/2022] Open
Affiliation(s)
- Hana Kolesová
- Institute of Anatomy, First Faculty of Medicine; Charles University in Prague; Czech Republic
- Institute of Physiology; Czech Academy of Sciences; Prague Czech Republic
| | - Martin Bartoš
- Institute of Anatomy, First Faculty of Medicine; Charles University in Prague; Czech Republic
- Institute of Dental Medicine, First Faculty of Medicine; Charles University in Prague; Czech Republic
| | - Wan Chin Hsieh
- Institute of Anatomy, First Faculty of Medicine; Charles University in Prague; Czech Republic
| | - Veronika Olejníčková
- Institute of Anatomy, First Faculty of Medicine; Charles University in Prague; Czech Republic
- Institute of Physiology; Czech Academy of Sciences; Prague Czech Republic
| | - David Sedmera
- Institute of Anatomy, First Faculty of Medicine; Charles University in Prague; Czech Republic
- Institute of Physiology; Czech Academy of Sciences; Prague Czech Republic
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12
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Wei T, Huang G, Gao J, Huang C, Sun M, Wu J, Bu J, Shen W. Sirtuin 3 Deficiency Accelerates Hypertensive Cardiac Remodeling by Impairing Angiogenesis. J Am Heart Assoc 2017; 6:JAHA.117.006114. [PMID: 28862956 PMCID: PMC5586452 DOI: 10.1161/jaha.117.006114] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Background Emerging evidence indicates that impaired angiogenesis may contribute to hypertension‐induced cardiac remodeling. The nicotinamide adenine dinucleotide–dependent deacetylase Sirtuin 3 (SIRT3) has the potential to modulate angiogenesis, but this has not been confirmed. As such, the aim of this study was to examine the relationship between SIRT3‐mediated angiogenesis and cardiac remodeling. Methods and Results Our experiments were performed on SIRT3 knockout and age‐matched wild‐type mice infused with angiotensin II (1400 ng/kg per minute) or saline for 14 days. After angiotensin II infusion, SIRT3 knockout mice developed more severe microvascular rarefaction and functional hypoxia in cardiac tissues compared with wild‐type mice. These events were concomitant with mitochondrial dysfunction and enhanced collagen I and collagen III expression, leading to cardiac fibrosis. Silencing SIRT3 facilitated angiotensin II–induced aberrant Pink/Parkin acetylation and impaired mitophagy, while excessive mitochondrial reactive oxygen species generation limited angiogenic capacity in primary mouse cardiac microvascular endothelial cells. Moreover, SIRT3 overexpression in cardiac microvascular endothelial cells enhanced Pink/Parkin‐mediated mitophagy, attenuated mitochondrial reactive oxygen species generation, and restored vessel sprouting and tube formation. In parallel, endothelial cell–specific SIRT3 transgenic mice showed decreased fibrosis, as well as improved cardiac function and microvascular network, compared with wild‐type mice with similar stimuli. Conclusions Collectively, these findings suggest that SIRT3 could promote angiogenesis through attenuating mitochondrial dysfunction caused by defective mitophagy.
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Affiliation(s)
- Tong Wei
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Department of Hypertension Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Gaojian Huang
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Department of Hypertension Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jing Gao
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Department of Hypertension Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Chenglin Huang
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Department of Hypertension Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Mengwei Sun
- Key Laboratory of State General Administration of Sport, Shanghai Research Institute of Sports Science, Shanghai, China
| | - Jian Wu
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Juan Bu
- Department of Macromolecular Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, China
| | - Weili Shen
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Department of Hypertension Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Correlative Imaging of the Murine Hind Limb Vasculature and Muscle Tissue by MicroCT and Light Microscopy. Sci Rep 2017; 7:41842. [PMID: 28169309 PMCID: PMC5294414 DOI: 10.1038/srep41842] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 12/22/2016] [Indexed: 12/20/2022] Open
Abstract
A detailed vascular visualization and adequate quantification is essential for the proper assessment of novel angiomodulating strategies. Here, we introduce an ex vivo micro-computed tomography (microCT)-based imaging approach for the 3D visualization of the entire vasculature down to the capillary level and rapid estimation of the vascular volume and vessel size distribution. After perfusion with μAngiofil®, a novel polymerizing contrast agent, low- and high-resolution scans (voxel side length: 2.58–0.66 μm) of the entire vasculature were acquired. Based on the microCT data, sites of interest were defined and samples further processed for correlative morphology. The solidified, autofluorescent μAngiofil® remained in the vasculature and allowed co-registering of the histological sections with the corresponding microCT-stack. The perfusion efficiency of μAngiofil® was validated based on lectin-stained histological sections: 98 ± 0.5% of the blood vessels were μAngiofil®-positive, whereas 93 ± 2.6% were lectin-positive. By applying this approach we analyzed the angiogenesis induced by the cell-based delivery of a controlled VEGF dose. Vascular density increased by 426% mainly through the augmentation of medium-sized vessels (20–40 μm). The introduced correlative and quantitative imaging approach is highly reproducible and allows a detailed 3D characterization of the vasculature and muscle tissue. Combined with histology, a broad range of complementary structural information can be obtained.
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Woloszyk A, Liccardo D, Mitsiadis TA. Three-Dimensional Imaging of the Developing Vasculature within Stem Cell-Seeded Scaffolds Cultured in ovo. Front Physiol 2016; 7:146. [PMID: 27148081 PMCID: PMC4838783 DOI: 10.3389/fphys.2016.00146] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 04/04/2016] [Indexed: 11/16/2022] Open
Abstract
Successful tissue engineering requires functional vascularization of the three-dimensional constructs with the aim to serve as implants for tissue replacement and regeneration. The survival of the implant is only possible if the supply of oxygen and nutrients by developing capillaries from the host is established. The chorioallantoic membrane (CAM) assay is a valuable tool to study the ingrowth and distribution of vessels into scaffolds composed by appropriate biomaterials and stem cell populations that are used in cell-based regenerative approaches. The developing vasculature of chicken embryos within cell-seeded scaffolds can be visualized with microcomputed tomography after intravenous injection of MicroFil®, which is a radiopaque contrast agent. Here, we provide a step-by-step protocol for the seeding of stem cells into silk fibroin scaffolds, the CAM culture conditions, the procedure of MicroFil® perfusion, and finally the microcomputed tomography scanning. Three-dimensional imaging of the vascularized tissue engineered constructs provides an important analytical tool for studying the potential of cell seeded scaffolds to attract vessels and form vascular networks, as well as for analyzing the number, density, length, branching, and diameter of vessels. This in ovo method can greatly help to screen implants that will be used for tissue regeneration purposes before their in vivo testing, thereby reducing the amount of animals needed for pre-clinical studies.
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Affiliation(s)
- Anna Woloszyk
- Orofacial Development and Regeneration, Centre for Dental Medicine, Institute of Oral Biology, University of Zurich Zurich, Switzerland
| | - Davide Liccardo
- Section of Biotechnology and Medical Histology and Embryology, Department of Experimental Medicine, Second University of Naples Naples, Italy
| | - Thimios A Mitsiadis
- Orofacial Development and Regeneration, Centre for Dental Medicine, Institute of Oral Biology, University of Zurich Zurich, Switzerland
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Sangaralingham SJ, Wang BH, Huang L, Kumfu S, Ichiki T, Krum H, Burnett JC. Cardiorenal fibrosis and dysfunction in aging: Imbalance in mediators and regulators of collagen. Peptides 2016; 76:108-14. [PMID: 26774586 PMCID: PMC4754975 DOI: 10.1016/j.peptides.2016.01.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 12/19/2015] [Accepted: 01/08/2016] [Indexed: 01/01/2023]
Abstract
Cardiorenal fibrosis is a biological process that increases with age and contributes to dysfunction of the heart and kidney. While numerous circulating and tissue hormones, cytokines and enzymes have been identified in the development of cardiorenal fibrosis, several reports have suggested that the anti-fibrotic natriuretic peptide system (NPS), pro-fibrotic renin-angiotensin-aldosterone system (RAAS), transforming growth factor-beta 1 (TGF-β1), matrix metalloproteinases (MMPs) and tissue inhibitor of metalloproteinases (TIMPs) are fundamental regulators and mediators of this process. However, the simultaneous assessment of these components in the development of age-mediated cardiorenal fibrotic remodeling is not completely understood. Thus, we assessed cardiorenal structure and function, the circulating NPS and RAAS and the cardiorenal tissue gene expression of collagen (Col) I, Col III, TGF-β1, MMP-9 and TIMP-1 in 2 and 20 month old Fischer rats. Our studies determined that aging was characterized by an increase in cardiorenal fibrosis that was accompanied with cardiorenal dysfunction. These alterations were associated with lower circulating atrial and C-type natriuretic peptides and higher angiotensin II and aldosterone levels in the aged rats. Moreover, we observed a decrease in Col I and III and an increase in TIMP- mRNA expressions in the aged heart and kidney, while TGF-β1 expression increased and MMP-9 decreased only in the aged kidney. We conclude that the age-mediated alterations in these fibrotic regulator and mediator profiles favors collagen accumulation due to an imbalance between the NPS and RAAS as well as a decline in the degradative pathway, thus suggesting a therapeutic opportunity to target these components.
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Affiliation(s)
- S Jeson Sangaralingham
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA.
| | - Bing H Wang
- Centre of Cardiovascular Research and Education in Therapeutics, School of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia
| | - Li Huang
- Centre of Cardiovascular Research and Education in Therapeutics, School of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia
| | - Sirinart Kumfu
- Centre of Cardiovascular Research and Education in Therapeutics, School of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia
| | - Tomoko Ichiki
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Henry Krum
- Centre of Cardiovascular Research and Education in Therapeutics, School of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia
| | - John C Burnett
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
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16
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Guyette JP, Charest JM, Mills RW, Jank BJ, Moser PT, Gilpin SE, Gershlak JR, Okamoto T, Gonzalez G, Milan DJ, Gaudette GR, Ott HC. Bioengineering Human Myocardium on Native Extracellular Matrix. Circ Res 2015; 118:56-72. [PMID: 26503464 DOI: 10.1161/circresaha.115.306874] [Citation(s) in RCA: 237] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 10/26/2015] [Indexed: 12/12/2022]
Abstract
RATIONALE More than 25 million individuals have heart failure worldwide, with ≈4000 patients currently awaiting heart transplantation in the United States. Donor organ shortage and allograft rejection remain major limitations with only ≈2500 hearts transplanted each year. As a theoretical alternative to allotransplantation, patient-derived bioartificial myocardium could provide functional support and ultimately impact the treatment of heart failure. OBJECTIVE The objective of this study is to translate previous work to human scale and clinically relevant cells for the bioengineering of functional myocardial tissue based on the combination of human cardiac matrix and human induced pluripotent stem cell-derived cardiomyocytes. METHODS AND RESULTS To provide a clinically relevant tissue scaffold, we translated perfusion-decellularization to human scale and obtained biocompatible human acellular cardiac scaffolds with preserved extracellular matrix composition, architecture, and perfusable coronary vasculature. We then repopulated this native human cardiac matrix with cardiomyocytes derived from nontransgenic human induced pluripotent stem cells and generated tissues of increasing 3-dimensional complexity. We maintained such cardiac tissue constructs in culture for 120 days to demonstrate definitive sarcomeric structure, cell and matrix deformation, contractile force, and electrical conduction. To show that functional myocardial tissue of human scale can be built on this platform, we then partially recellularized human whole-heart scaffolds with human induced pluripotent stem cell-derived cardiomyocytes. Under biomimetic culture, the seeded constructs developed force-generating human myocardial tissue and showed electrical conductivity, left ventricular pressure development, and metabolic function. CONCLUSIONS Native cardiac extracellular matrix scaffolds maintain matrix components and structure to support the seeding and engraftment of human induced pluripotent stem cell-derived cardiomyocytes and enable the bioengineering of functional human myocardial-like tissue of multiple complexities.
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Affiliation(s)
- Jacques P Guyette
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.)
| | - Jonathan M Charest
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.)
| | - Robert W Mills
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.)
| | - Bernhard J Jank
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.)
| | - Philipp T Moser
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.)
| | - Sarah E Gilpin
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.)
| | - Joshua R Gershlak
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.)
| | - Tatsuya Okamoto
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.)
| | - Gabriel Gonzalez
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.)
| | - David J Milan
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.)
| | - Glenn R Gaudette
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.)
| | - Harald C Ott
- From the Center for Regenerative Medicine (J.P.G., J.M.C., B.J.J., P.T.M., S.E.G., T.O., G.G., H.C.O.), Cardiovascular Research Center (R.W.M., D.J.M.), Division of Cardiology (D.J.M.), and Division of Thoracic Surgery, Department of Surgery (H.C.O.), Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA (J.P.G., B.J.J., P.T.M., S.E.G., G.G., H.C.O.); Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA (J.R.G., G.R.G.); and Harvard Stem Cell Institute, Cambridge, MA (H.C.O.).
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17
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Beliveau P, Cheriet F, Anderson SA, Taylor JL, Arai AE, Hsu LY. Quantitative assessment of myocardial fibrosis in an age-related rat model by ex vivo late gadolinium enhancement magnetic resonance imaging with histopathological correlation. Comput Biol Med 2015; 65:103-13. [PMID: 26313531 DOI: 10.1016/j.compbiomed.2015.07.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 07/28/2015] [Accepted: 07/29/2015] [Indexed: 10/23/2022]
Abstract
Late gadolinium enhanced (LGE) cardiac magnetic resonance (CMR) imaging can detect the presence of myocardial infarction from ischemic cardiomyopathies (ICM). However, it is more challenging to detect diffuse myocardial fibrosis from non-ischemic cardiomyopathy (NICM) with this technique due to more subtle and heterogeneous enhancement of the myocardium. This study investigates whether high-resolution LGE CMR can detect age-related myocardial fibrosis using quantitative texture analysis with histological validation. LGE CMR of twenty-four rat hearts (twelve 6-week-old and twelve 2-year-old) was performed using a 7T MRI scanner. Picrosirius red was used as the histopathology reference for collagen staining. Fibrosis in the myocardium was quantified with standard deviation (SD) threshold methods from the LGE CMR images and 3D contrast texture maps that were computed from gray level co-occurrence matrix of the CMR images. There was a significant increase of collagen fibers in the aged compared to the young rat histology slices (2.60±0.27 %LV vs. 1.24±0.29 %LV, p<0.01). Both LGE CMR and texture images showed a significant increase of myocardial fibrosis in the elderly compared to the young rats. Fibrosis in the LGE CMR images correlated strongly with histology with the 3 SD threshold (r=0.84, y=0.99x+0.00). Similarly, fibrosis in the contrast texture maps correlated with the histology using the 4 SD threshold (r=0.89, y=1.01x+0.00). High resolution ex-vivo LGE CMR can detect the presence of diffuse fibrosis that naturally developed in elderly rat hearts. Our results suggest that texture analysis may improve the assessment of myocardial fibrosis in LGE CMR images.
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Affiliation(s)
- Pascale Beliveau
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA; Institute of Biomedical Engineering, Ecole Polytechnique of Montreal, Montreal, Canada
| | - Farida Cheriet
- Institute of Biomedical Engineering, Ecole Polytechnique of Montreal, Montreal, Canada
| | - Stasia A Anderson
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Joni L Taylor
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Andrew E Arai
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Li-Yueh Hsu
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
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18
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Clark DP, Badea CT. Micro-CT of rodents: state-of-the-art and future perspectives. Phys Med 2014; 30:619-34. [PMID: 24974176 PMCID: PMC4138257 DOI: 10.1016/j.ejmp.2014.05.011] [Citation(s) in RCA: 141] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 05/15/2014] [Accepted: 05/28/2014] [Indexed: 02/06/2023] Open
Abstract
Micron-scale computed tomography (micro-CT) is an essential tool for phenotyping and for elucidating diseases and their therapies. This work is focused on preclinical micro-CT imaging, reviewing relevant principles, technologies, and applications. Commonly, micro-CT provides high-resolution anatomic information, either on its own or in conjunction with lower-resolution functional imaging modalities such as positron emission tomography (PET) and single-photon emission computed tomography (SPECT). More recently, however, advanced applications of micro-CT produce functional information by translating clinical applications to model systems (e.g., measuring cardiac functional metrics) and by pioneering new ones (e.g. measuring tumor vascular permeability with nanoparticle contrast agents). The primary limitations of micro-CT imaging are the associated radiation dose and relatively poor soft tissue contrast. We review several image reconstruction strategies based on iterative, statistical, and gradient sparsity regularization, demonstrating that high image quality is achievable with low radiation dose given ever more powerful computational resources. We also review two contrast mechanisms under intense development. The first is spectral contrast for quantitative material discrimination in combination with passive or actively targeted nanoparticle contrast agents. The second is phase contrast which measures refraction in biological tissues for improved contrast and potentially reduced radiation dose relative to standard absorption imaging. These technological advancements promise to develop micro-CT into a commonplace, functional and even molecular imaging modality.
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Affiliation(s)
- D P Clark
- Center for In Vivo Microscopy, Department of Radiology, Duke University Medical Center, Box 3302, Durham, NC 27710, USA
| | - C T Badea
- Center for In Vivo Microscopy, Department of Radiology, Duke University Medical Center, Box 3302, Durham, NC 27710, USA.
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19
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Circulation: Cardiovascular Imaging
Editors’ Picks. Circ Cardiovasc Imaging 2013. [DOI: 10.1161/circimaging.113.001335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Plein S, Motwani M. Fractional flow reserve as the reference standard for myocardial perfusion studies: fool's gold? Eur Heart J Cardiovasc Imaging 2013; 14:1211-3. [PMID: 23793873 DOI: 10.1093/ehjci/jet110] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- Sven Plein
- Multidisciplinary Cardiovascular Research Centre and The Division of Cardiovascular and Diabetes Research, Leeds Institute of Genetics, Health and Therapeutics, University of Leeds, Clarendon Way, Leeds LS2 9JT, UK
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21
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Cardiac Micro-PET-CT. CURRENT CARDIOVASCULAR IMAGING REPORTS 2013. [DOI: 10.1007/s12410-012-9188-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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22
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Martin FL, Sangaralingham SJ, Huntley BK, McKie PM, Ichiki T, Chen HH, Korinek J, Harders GE, Burnett JC. CD-NP: a novel engineered dual guanylyl cyclase activator with anti-fibrotic actions in the heart. PLoS One 2012; 7:e52422. [PMID: 23272242 PMCID: PMC3525541 DOI: 10.1371/journal.pone.0052422] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Accepted: 11/13/2012] [Indexed: 12/31/2022] Open
Abstract
Natriuretic peptides (NPs) are cardioprotective through the activation of guanylyl cyclase (GC) receptors A and B. CD-NP, also known as cenderitide, is a novel engineered NP that was designed to uniquely serve as a first-in-class dual GC receptor agonist. Recognizing the aldosterone suppressing actions of GC-A activation and the potent inhibitory actions on collagen synthesis and fibroblast proliferation through GC-B activation, the current study was designed to establish the anti-fibrotic actions of CD-NP, administered subcutaneously, in an experimental rat model of early cardiac fibrosis induced by unilateral nephrectomy (UNX). Our results demonstrate that a two week subcutaneous infusion of CD-NP significantly suppresses left ventricular fibrosis and circulating aldosterone, while preserving both systolic and diastolic function, in UNX rats compared to vehicle treated UNX rats. Additionally we also confirmed, in vitro, that CD-NP significantly generates the second messenger, cGMP, through both the GC-A and GC-B receptors. Taken together, this novel dual GC receptor activator may represent an innovative anti-fibrotic therapeutic agent.
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Affiliation(s)
- Fernando L. Martin
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, United States of America
| | - S. Jeson Sangaralingham
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, United States of America
- * E-mail:
| | - Brenda K. Huntley
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Paul M. McKie
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Tomoko Ichiki
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Horng H. Chen
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Josef Korinek
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Gerald E. Harders
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, United States of America
| | - John C. Burnett
- Cardiorenal Research Laboratory, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, United States of America
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