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Lambrinos G, Cristofaro V, Pelton K, Bigger-Allen A, Doyle C, Vasquez E, Bielenberg DR, Sullivan MP, Adam RM. Neuropilin 2 Is a Novel Regulator of Distal Colon Contractility. THE AMERICAN JOURNAL OF PATHOLOGY 2022; 192:1592-1603. [PMID: 35985479 PMCID: PMC9667714 DOI: 10.1016/j.ajpath.2022.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 06/20/2022] [Accepted: 07/25/2022] [Indexed: 06/05/2023]
Abstract
Appropriate coordination of smooth muscle contraction and relaxation is essential for normal colonic motility. The impact of perturbed motility ranges from moderate, in conditions such as colitis, to potentially fatal in the case of pseudo-obstruction. The mechanisms underlying aberrant motility and the extent to which they can be targeted pharmacologically are incompletely understood. This study identified colonic smooth muscle as a major site of expression of neuropilin 2 (Nrp2) in mice and humans. Mice with inducible smooth muscle-specific knockout of Nrp2 had an increase in evoked contraction of colonic rings in response to carbachol at 1 and 4 weeks following initiation of deletion. KCl-induced contractions were also increased at 4 weeks. Colonic motility was similarly enhanced, as evidenced by faster bead expulsion in Nrp2-deleted mice versus Nrp2-intact controls. In length-tension analysis of the distal colon, passive tension was similar in Nrp2-deficient and Nrp2-intact mice, but at low strains, active stiffness was greater in Nrp2-deficient animals. Consistent with the findings in conditional Nrp2 mice, Nrp2-null mice showed increased contractility in response to carbachol and KCl. Evaluation of selected proteins implicated in smooth muscle contraction revealed no significant differences in the level of α-smooth muscle actin, myosin light chain, calponin, or RhoA. Together, these findings identify Nrp2 as a novel regulator of colonic contractility that may be targetable in conditions characterized by dysmotility.
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Affiliation(s)
- George Lambrinos
- Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts
| | - Vivian Cristofaro
- Department of Surgery, Harvard Medical School, Boston, Massachusetts; Division of Urology, VA Boston Healthcare System, Boston, Massachusetts
| | - Kristine Pelton
- Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts
| | - Alexander Bigger-Allen
- Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts; Biological and Biomedical Sciences Program, Division of Medical Sciences, Harvard Medical School, Boston, Massachusetts
| | - Claire Doyle
- Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts
| | - Evalynn Vasquez
- Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts
| | - Diane R Bielenberg
- Department of Surgery, Harvard Medical School, Boston, Massachusetts; Vascular Biology Program, Boston Children's Hospital, Boston, Massachusetts
| | - Maryrose P Sullivan
- Department of Surgery, Harvard Medical School, Boston, Massachusetts; Division of Urology, VA Boston Healthcare System, Boston, Massachusetts.
| | - Rosalyn M Adam
- Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts; Department of Surgery, Harvard Medical School, Boston, Massachusetts.
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Astragaloside IV Protects Detrusor from Partial Bladder Outlet Obstruction-Induced Oxidative Stress by Activating Mitophagy through AMPK-ULK1 Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:5757367. [PMID: 35873803 PMCID: PMC9300277 DOI: 10.1155/2022/5757367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/21/2022] [Accepted: 06/27/2022] [Indexed: 11/23/2022]
Abstract
Aims Bladder outlet obstruction (BOO) and the consequent low contractility of detrusor are the leading causes of voiding dysfunction. In this study, we aimed to evaluate the pharmacological activity of astragaloside IV (AS-IV), an antioxidant biomolecule that possess beneficial effect in many organs, on detrusor contractility and bladder wall remodeling process. Methods Partial BOO (pBOO) was created by urethral occlusion in female rats, followed by oral gavage of different dose of AS-IV or vehicle. Cystometric evaluation and contractility test were performed. Bladder wall sections were used in morphology staining, and bladder tissue lysate was used for ELISA assay. Primary smooth muscle cells (SMCs) derived from detrusor were used for mechanism studies. Results Seven weeks after pBOO, the bladder compensatory enlarged, and the contractility in response to electrical or chemical stimuli was reduced, while AS-IV treatment reversed this effect dose-dependently. AS-IV also showed beneficial effect on reversing the bladder wall remodeling process, as well as reducing ROS level. In mechanism study, AS-IV activated mitophagy and alleviated oxidative stress via an AMPK-dependent pathway. Conclusion Out data suggested that AS-IV enhanced the contractility of detrusor and protected the bladder from obstruction induced damage, via enhancing the mitophagy and restoring mitochondria function trough an AMPK-dependent way.
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Male Lower Urinary Tract Dysfunction: An Underrepresented Endpoint in Toxicology Research. TOXICS 2022; 10:toxics10020089. [PMID: 35202275 PMCID: PMC8880407 DOI: 10.3390/toxics10020089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/10/2022] [Accepted: 02/11/2022] [Indexed: 02/04/2023]
Abstract
Lower urinary tract dysfunction (LUTD) is nearly ubiquitous in men of advancing age and exerts substantial physical, mental, social, and financial costs to society. While a large body of research is focused on the molecular, genetic, and epigenetic underpinnings of the disease, little research has been dedicated to the influence of environmental chemicals on disease initiation, progression, or severity. Despite a few recent studies indicating a potential developmental origin of male LUTD linked to chemical exposures in the womb, it remains a grossly understudied endpoint in toxicology research. Therefore, we direct this review to toxicologists who are considering male LUTD as a new aspect of chemical toxicity studies. We focus on the LUTD disease process in men, as well as in the male mouse as a leading research model. To introduce the disease process, we describe the physiology of the male lower urinary tract and the cellular composition of lower urinary tract tissues. We discuss known and suspected mechanisms of male LUTD and examples of environmental chemicals acting through these mechanisms to contribute to LUTD. We also describe mouse models of LUTD and endpoints to diagnose, characterize, and quantify LUTD in men and mice.
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Wang N, Lu L, Cao QF, Qian S, Ding J, Wang C, Duan H, Shen H, Qi J. Partial inhibition of activin receptor-like kinase 4 alleviates bladder fibrosis caused by bladder outlet obstruction. Exp Cell Res 2021; 406:112724. [PMID: 34237300 DOI: 10.1016/j.yexcr.2021.112724] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 06/22/2021] [Accepted: 06/29/2021] [Indexed: 12/17/2022]
Abstract
The bladder undergoes profound structural alterations after bladder outlet obstruction (BOO), characterized by hypertrophy of the bladder wall and accumulation of extracellular matrix (ECM). Transforming growth factor-β (TGF-β) has been found to promote fibrosis of the bladder induced by partial bladder outlet obstruction (pBOO). Activin receptor-like kinase 4 (ALK4) is a downstream receptor of the TGF-β superfamily. However, the role of the ALK4-Smad2/3 pathway in the pathogenesis of bladder fibrosis caused by pBOO remains unknown. This study focused on learning the role of ALK4 in the process of bladder fibrosis caused by pBOO. The pBOO mice models showed that ALK4 expression was found to upregulate in the wild-type bladder 6 weeks after pBOO compared to control group. Then, mice with heterozygous knockout of the ALK4 gene (ALK4+/-) were generated. Histological analysis and Western blot (WB) results showed significant suppression of collagen expression in the bladders of ALK4+/- mice after pBOO compared with WT mice. WB also showed that ALK4+/- mice demonstrated significant suppression of phosphorylated Smad2/3 (p-Smad2/3) expression in the bladder 6 weeks after pBOO but not of phosphorylated extracellular signal-regulated kinase, c-Jun N-terminal kinase or protein 38 (p-ERK, p-JNK, p-P38) expression. This effect might have occurred through partial inactivation of the Smad2/3 signaling pathway. In vitro, ALK4 overexpression promoted collagen production in cultured BSMCs and activated the Smad2/3 signaling pathway. Taken together, our results demonstrated that ALK4 insufficiency alleviated bladder fibrosis in a mouse model of pBOO partly by suppressing Smad2/3 activity.
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Affiliation(s)
- Ning Wang
- Department of Urology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, Henan, China; Department of Urology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Lu Lu
- Department of Gastrointestinal Surgery, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, Henan, China
| | - Qi Feng Cao
- Department of Urology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Subo Qian
- Department of Urology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Jie Ding
- Department of Urology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Chen Wang
- Department of Urology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Huangqi Duan
- Department of Urology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Haibo Shen
- Department of Urology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China.
| | - Jun Qi
- Department of Urology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China.
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Harman JL, Sayers J, Chapman C, Pellet-Many C. Emerging Roles for Neuropilin-2 in Cardiovascular Disease. Int J Mol Sci 2020; 21:E5154. [PMID: 32708258 PMCID: PMC7404143 DOI: 10.3390/ijms21145154] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/16/2020] [Accepted: 07/17/2020] [Indexed: 12/26/2022] Open
Abstract
Cardiovascular disease, the leading cause of death worldwide, is predominantly associated with atherosclerosis. Atherosclerosis is a chronic inflammatory disease characterised by the narrowing of large to medium-sized arteries due to a build-up of plaque. Atherosclerotic plaque is comprised of lipids, extracellular matrix, and several cell types, including endothelial, immune, and vascular smooth muscle cells. Such narrowing of the blood vessels can itself restrict blood flow to vital organs but most severe clinical complications, including heart attacks and strokes, occur when lesions rupture, triggering the blood to clot and obstructing blood flow further down the vascular tree. To circumvent such obstructions, percutaneous coronary intervention or bypass grafts are often required; however, re-occlusion of the treated artery frequently occurs. Neuropilins (NRPs), a multifunctional family of cell surface co-receptors, are expressed by endothelial, immune, and vascular smooth muscle cells and are regulators of numerous signalling pathways within the vasculature. Here, we review recent studies implicating NRP2 in the development of occlusive vascular diseases and discuss how NRP2 could be targeted for therapeutic intervention.
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Affiliation(s)
- Jennifer L Harman
- Department of Comparative Biomedical Sciences, Royal Veterinary College, Royal College Street, London NW1 0TU, UK
| | - Jacob Sayers
- University College London, Division of Medicine, Rayne Building, University Street, London WC1E 6JF, UK
| | - Chey Chapman
- Department of Comparative Biomedical Sciences, Royal Veterinary College, Royal College Street, London NW1 0TU, UK
| | - Caroline Pellet-Many
- Department of Comparative Biomedical Sciences, Royal Veterinary College, Royal College Street, London NW1 0TU, UK
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Thangavel C, Gomes CM, Zderic SA, Javed E, Addya S, Singh J, Das S, Birbe R, Den RB, Rattan S, Deshpande DA, Penn RB, Chacko S, Boopathi E. NF-κB and GATA-Binding Factor 6 Repress Transcription of Caveolins in Bladder Smooth Muscle Hypertrophy. THE AMERICAN JOURNAL OF PATHOLOGY 2019; 189:847-867. [PMID: 30707892 DOI: 10.1016/j.ajpath.2018.12.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 12/03/2018] [Accepted: 12/17/2018] [Indexed: 12/26/2022]
Abstract
Caveolins (CAVs) are structural proteins of caveolae that function as signaling platforms to regulate smooth muscle contraction. Loss of CAV protein expression is associated with impaired contraction in obstruction-induced bladder smooth muscle (BSM) hypertrophy. In this study, microarray analysis of bladder RNA revealed down-regulation of CAV1, CAV2, and CAV3 gene transcription in BSM from models of obstructive bladder disease in mice and humans. We identified and characterized regulatory regions responsible for CAV1, CAV2, and CAV3 gene expression in mice with obstruction-induced BSM hypertrophy, and in men with benign prostatic hyperplasia. DNA affinity chromatography and chromatin immunoprecipitation assays revealed a greater increase in binding of GATA-binding factor 6 (GATA-6) and NF-κB to their cognate binding motifs on CAV1, CAV2, and CAV3 promoters in obstructed BSM relative to that observed in control BSM. Knockout of NF-κB subunits, shRNA-mediated knockdown of GATA-6, or pharmacologic inhibition of GATA-6 and NF-κB in BSM increased CAV1, CAV2, and CAV3 transcription and promoter activity. Conversely, overexpression of GATA-6 decreased CAV2 and CAV3 transcription and promoter activity. Collectively, these data provide new insight into the mechanisms by which CAV gene expression is repressed in hypertrophied BSM in obstructive bladder disease.
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Affiliation(s)
| | - Cristiano M Gomes
- Division of Urology, University of Sao Paulo School of Medicine, Hospital das Clinicas, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Stephen A Zderic
- Department of Urology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Elham Javed
- Department of Medicine, Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Sankar Addya
- Kimmel Cancer Centre, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Jagmohan Singh
- Division of Gastroenterology and Hepatology, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Sreya Das
- Kimmel Cancer Centre, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Ruth Birbe
- Department of Pathology and Laboratory Medicine, Cooper University Health Care, Camden, New Jersey
| | - Robert B Den
- Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Satish Rattan
- Division of Gastroenterology and Hepatology, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Deepak A Deshpande
- Department of Medicine, Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Raymond B Penn
- Department of Medicine, Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Samuel Chacko
- Division of Urology, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Pathobiology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Ettickan Boopathi
- Department of Medicine, Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania; Division of Urology, University of Pennsylvania, Philadelphia, Pennsylvania.
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Gheinani AH, Köck I, Vasquez E, Baumgartner U, Bigger-Allen A, Sack BS, Burkhard FC, Adam RM, Monastyrskaya K. Concordant miRNA and mRNA expression profiles in humans and mice with bladder outlet obstruction. AMERICAN JOURNAL OF CLINICAL AND EXPERIMENTAL UROLOGY 2018; 6:219-233. [PMID: 30697578 PMCID: PMC6334198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 12/14/2018] [Indexed: 06/09/2023]
Abstract
Bladder outlet obstruction (BOO) leads to lower urinary tract symptoms (LUTS) and urodynamic changes of the bladder function. Previously we identified microRNA (miRNA) and mRNA expression profiles associated with different states of BOO-induced LUTD in human patients. Bladder wall remodeling resulting from obstruction is widely studied in animal models of experimentally-induced partial BOO (pBOO). Here we determined the expression profiles of miRNAs and selected mRNAs in pBOO mice and compared the observed changes to human patients. Similar to results from human patients, we observed a down-regulation of smooth muscle-associated miRNAs mmu-miR-1, mmu-miR-143, mmu-miR-145, mmu-miR-486 and mmu-miR-133a in pBOO mouse bladders. Pro-fibrotic miRNAs mmu-miR-142-3p and mmu-miR-21 were up-regulated, and anti-fibrotic miRNA mmu-miR-29c was down-regulated. Pathway analysis in human BOO patients identified TNF-alpha as the top upstream regulator. Although there was evidence of hypertrophic changes in pBOO mice, contrary to human data, we observed no regulation of TNF-responsive genes in the mouse model. Experimentally-induced pBOO in mice led to significant gene expression changes, including alteration of pro-fibrotic mRNAs and miRNAs resembling human BOO patients. Gene expression changes were also validated in a mouse model of bladder inflammation. Lack of evidence of TNF-alpha-induced miRNA and mRNA regulation might indicate a different pathophysiological mechanism of organ remodeling in pBOO model compared to the human disease.
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Affiliation(s)
- Ali Hashemi Gheinani
- Department of Urology, Boston Children’s HospitalBoston, MA, USA
- Department of Surgery, Harvard Medical SchoolBoston, MA, USA
| | - Ivonne Köck
- Urology Research Laboratory, Department of Clinical Research, University of BernSwitzerland
| | - Evalynn Vasquez
- Department of Urology, Boston Children’s HospitalBoston, MA, USA
- Department of Surgery, Harvard Medical SchoolBoston, MA, USA
- Division of Urology, Children’s Hospital Los Angeles and Keck School of Medicine of the University of Southern CaliforniaLos Angeles, CA 90027, USA
| | | | - Alexander Bigger-Allen
- Department of Urology, Boston Children’s HospitalBoston, MA, USA
- Biological and Biomedical Sciences PhD Program, Harvard Medical SchoolBoston, MA, USA
| | - Bryan S Sack
- Department of Urology, Boston Children’s HospitalBoston, MA, USA
- Department of Surgery, Harvard Medical SchoolBoston, MA, USA
- Department of Urology, Mott Children’s Hospital and University of MichiganAnn Arbor, MI 48109, USA
| | | | - Rosalyn M Adam
- Department of Urology, Boston Children’s HospitalBoston, MA, USA
- Department of Surgery, Harvard Medical SchoolBoston, MA, USA
| | - Katia Monastyrskaya
- Urology Research Laboratory, Department of Clinical Research, University of BernSwitzerland
- Department of Urology, University HospitalBern, Switzerland
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Tassone NM, Li B, Devine MY, Hausner PM, Patel MS, Gould AD, Kochan KS, Dettman RW, Gong EM. Voided volumes predict degree of partial bladder outlet obstruction in a murine model. AMERICAN JOURNAL OF CLINICAL AND EXPERIMENTAL UROLOGY 2018; 6:189-196. [PMID: 30510971 PMCID: PMC6261872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 10/08/2018] [Indexed: 06/09/2023]
Abstract
The partial bladder outlet obstruction animal model (pBOO) is commonly used as a model for obstructive uropathy. Unfortunately, pBOO demonstrates variable degrees of obstruction requiring bladder weight (BW) or urodynamic studies to determine true obstruction. Our objective is to identify extent of obstruction by correlating early post-operative Void Stains on Paper (VSOP) assays with ultimate BW in mice. pBOO was performed on 32 mice 1- and 4-week VSOPs were quantified for mean voided volume (mVV). At 4 weeks, bladders were harvested and weighed. Correlation was evaluated through bivariate kernel density estimation and a Pearson correlation coefficient (SAS). Single variable histogram of the data established groups based on BWs and mVV. mVV's and bladder weights within group pairings were averaged and plotted to render a non-linear regression model. A significant correlation was found between 1-week mVVs and 4-week BWs upon bivariate analysis with a correlation coefficient of -0.758 (p = 0.0294). A non-linear regression of plotted data defined a statistically significant fit equation correlating 1-week mVV to 4-week BW. We demonstrate a novel method for forecasting degree of obstruction in pBOO based on 1-week post-operative VSOP mVV.
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Affiliation(s)
- Nicholas M Tassone
- Department of Pediatric Urology, Ann & Robert H. Lurie Children’s Hospital of Chicago225 E. Chicago Ave., Chicago, IL 60611, USA
| | - Belinda Li
- Department of Pediatric Urology, Ann & Robert H. Lurie Children’s Hospital of Chicago225 E. Chicago Ave., Chicago, IL 60611, USA
- Department of Urology, Loyola University Health System2160 S. First Ave., Maywood, IL 60153, USA
| | - Megan Y Devine
- Department of Pediatric Urology, Ann & Robert H. Lurie Children’s Hospital of Chicago225 E. Chicago Ave., Chicago, IL 60611, USA
| | - Paulette M Hausner
- Department of Pediatric Urology, Ann & Robert H. Lurie Children’s Hospital of Chicago225 E. Chicago Ave., Chicago, IL 60611, USA
- Department of Biology, Loyola University1032 W. Sheridan Rd., Chicago, IL 60660, USA
| | - Mehul S Patel
- Department of Urology, Feinberg School of Medicine, Northwestern University303 E. Chicago Ave., 16-703, Chicago, IL 60611, USA
| | - Andrew D Gould
- Department of Pediatric Urology, Ann & Robert H. Lurie Children’s Hospital of Chicago225 E. Chicago Ave., Chicago, IL 60611, USA
| | - Kirsten S Kochan
- Department of Pediatric Urology, Ann & Robert H. Lurie Children’s Hospital of Chicago225 E. Chicago Ave., Chicago, IL 60611, USA
- Department of Biology, DePaul University1110 W. Belden Ave., Chicago, IL 60614, USA
| | - Robert W Dettman
- Department of Pediatric Urology, Ann & Robert H. Lurie Children’s Hospital of Chicago225 E. Chicago Ave., Chicago, IL 60611, USA
- Department of Urology, Feinberg School of Medicine, Northwestern University303 E. Chicago Ave., 16-703, Chicago, IL 60611, USA
| | - Edward M Gong
- Department of Pediatric Urology, Ann & Robert H. Lurie Children’s Hospital of Chicago225 E. Chicago Ave., Chicago, IL 60611, USA
- Department of Urology, Feinberg School of Medicine, Northwestern University303 E. Chicago Ave., 16-703, Chicago, IL 60611, USA
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Tumor Necrosis Factor-α Initiates miRNA-mRNA Signaling Cascades in Obstruction-Induced Bladder Dysfunction. THE AMERICAN JOURNAL OF PATHOLOGY 2018; 188:1847-1864. [DOI: 10.1016/j.ajpath.2018.05.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 04/03/2018] [Accepted: 05/03/2018] [Indexed: 02/08/2023]
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10
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Schäfer FM, Stehr M. Tissue engineering in pediatric urology - a critical appraisal. Innov Surg Sci 2018; 3:107-118. [PMID: 31579774 PMCID: PMC6604568 DOI: 10.1515/iss-2018-0011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 04/17/2018] [Indexed: 01/01/2023] Open
Abstract
Tissue engineering is defined as the combination of biomaterials and bioengineering principles together with cell transplantation or directed growth of host cells to develop a biological replacement tissue or organ that can be a substitute for normal tissue both in structure and function. Despite early promising preclinical studies, clinical translation of tissue engineering in pediatric urology into humans has been unsuccessful both for cell-seeded and acellular scaffolds. This can be ascribed to various factors, including the use of only non-diseased models that inaccurately describe the structural and functional modifications of diseased tissue. The paper addresses potential future strategies to overcome the limitations experienced in clinical applications so far. This includes the use of stem cells of various origins (mesenchymal stem cells, hematopoietic stem/progenitor cells, urine-derived stem cells, and progenitor cells of the urothelium) as well as the need for a deeper understanding of signaling pathways and directing tissue ingrowth and differentiation through the concept of dynamic reciprocity. The development of smart scaffolds that release trophic factors in a set and timely manner will probably improve regeneration. Modulation of innate immune response as a major contributor to tissue regeneration outcome is also addressed. It is unlikely that only one of these strategies alone will lead to clinically applicable tissue engineering strategies in pediatric urology. In the meanwhile, the fundamental new insights into regenerative processes already obtained in the attempts of tissue engineering of the lower urogenital tract remain our greatest gain.
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Affiliation(s)
- Frank-Mattias Schäfer
- Department of Pediatric Surgery and Pediatric Urology, Cnopfsche Kinderklinik, Nürnberg, Germany
| | - Maximilian Stehr
- Department of Pediatric Surgery and Pediatric Urology, Cnopfsche Kinderklinik, Nürnberg, Germany
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