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Azari F, Robertson AM, Birder LA. GEOMETRIC CHARACTERIZATION OF RAT URINARY BLADDER WALL DURING EX-VIVO FILLING USING MICRO-COMPUTED TOMOGRAPHY (MICRO-CT). ARXIV 2024:arXiv:2405.20454v1. [PMID: 38855550 PMCID: PMC11160870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Current mechanical models of the bladder largely idealize the bladder as spherical with uniform thickness. This present study aims to investigate this idealization using micro-CT to generate 3D reconstructed models of rat bladders at 10-20 micrometer resolution in both voided and filled states. Applied to three rat bladders, this approach identifies shape, volume, and thickness variations under different pressures. These results demonstrate the filling/voiding process is far from the idealized spherical inflation/contraction. However, the geometry idealizations may be reasonable in cases where the filled bladder geometry is of importance, such as in studies of growth and remodeling.
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Affiliation(s)
- Fatemeh Azari
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, 3700 O'Hara Street Benedum Hall of Engineering, Pittsburgh, PA 15261
| | - Anne M Robertson
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, 3700 O'Hara Street Benedum Hall of Engineering, Pittsburgh, PA 15261
- Department of Bioengineering, University of Pittsburgh, 3700 O'Hara Street Benedum Hall of Engineering, Pittsburgh, PA 15261
| | - Lori A Birder
- Department of Medicine, University of Pittsburgh, 3550 Terrace St, Pittsburgh, PA 15213
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, 3550 Terrace St, Pittsburgh, PA 15213
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Gheinani AH, Sack BS, Bigger-Allen A, Thaker H, Atta H, Lambrinos G, Costa K, Doyle C, Gharaee-Kermani M, Patalano S, Piper M, Cotellessa JF, Vitko D, Li H, Prabhakaran MK, Cristofaro V, Froehlich J, Lee RS, Yang W, Sullivan MP, Macoska JA, Adam RM. Integrated omics analysis unveils a DNA damage response to neurogenic injury. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.10.571015. [PMID: 38106029 PMCID: PMC10723451 DOI: 10.1101/2023.12.10.571015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Spinal cord injury (SCI) evokes profound bladder dysfunction. Current treatments are limited by a lack of molecular data to inform novel therapeutic avenues. Previously, we showed systemic inosine treatment improved bladder function following SCI in rats. Here, we applied multi-omics analysis to explore molecular alterations in the bladder and their sensitivity to inosine following SCI. Canonical pathways regulated by SCI included those associated with protein synthesis, neuroplasticity, wound healing, and neurotransmitter degradation. Upstream regulator analysis identified MYC as a key regulator, whereas causal network analysis predicted multiple regulators of DNA damage response signaling following injury, including PARP-1. Staining for both DNA damage (γH2AX) and PARP activity (poly-ADP-ribose) markers in the bladder was increased following SCI, and attenuated in inosine-treated tissues. Proteomics analysis suggested that SCI induced changes in protein synthesis-, neuroplasticity-, and oxidative stress-associated pathways, a subset of which were shown in transcriptomics data to be inosine-sensitive. These findings provide novel insights into the molecular landscape of the bladder following SCI, and highlight a potential role for PARP inhibition to treat neurogenic bladder dysfunction.
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Affiliation(s)
- Ali Hashemi Gheinani
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Functional Urology Research Group, Department for BioMedical Research DBMR, University of Bern, Switzerland
- Department of Urology, Inselspital University Hospital, 3010 Bern, Switzerland
- Department of Surgery, Harvard Medical School, Boston, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Bryan S Sack
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Functional Urology Research Group, Department for BioMedical Research DBMR, University of Bern, Switzerland
| | - Alex Bigger-Allen
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Biological & Biomedical Sciences Graduate Program, Division of Medical Sciences, Harvard Medical School, Boston, MA
| | - Hatim Thaker
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Hussein Atta
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - George Lambrinos
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Kyle Costa
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
| | - Claire Doyle
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | | | | | - Mary Piper
- Harvard Chan Bioinformatics Core, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Justin F Cotellessa
- Departments of Surgery and Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Dijana Vitko
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Haiying Li
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Manubhai Kadayil Prabhakaran
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Vivian Cristofaro
- Division of Urology, VA Boston Healthcare System, Boston, MA, USA
- University of Massachusetts, Boston, MA, USA
| | - John Froehlich
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Richard S Lee
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Wei Yang
- Departments of Surgery and Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Maryrose P Sullivan
- Division of Urology, VA Boston Healthcare System, Boston, MA, USA
- University of Massachusetts, Boston, MA, USA
| | | | - Rosalyn M Adam
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Urology, Inselspital University Hospital, 3010 Bern, Switzerland
- Department of Surgery, Harvard Medical School, Boston, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
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