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Senarathna J, Pathak AP. Visualizing the Microcirculation. Microcirculation 2022; 29:e12785. [PMID: 36125801 DOI: 10.1111/micc.12785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Janaka Senarathna
- The Russel H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Arvind P Pathak
- The Russel H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Rowe G, Heng DS, Beare JE, Hodges NA, Tracy EP, Murfee WL, LeBlanc AJ. Stromal Vascular Fraction Reverses the Age-Related Impairment in Revascularization following Injury. J Vasc Res 2022; 59:343-357. [PMID: 36075199 PMCID: PMC9780192 DOI: 10.1159/000526002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 07/06/2022] [Indexed: 12/31/2022] Open
Abstract
Adipose-derived stromal vascular fraction (SVF) has emerged as a potential regenerative therapy, but few studies utilize SVF in a setting of advanced age. Additionally, the specific cell population in SVF providing therapeutic benefit is unknown. We hypothesized that aging would alter the composition of cell populations present in SVF and its ability to promote angiogenesis following injury, a mechanism that is T cell-mediated. SVF isolated from young and old Fischer 344 rats was examined with flow cytometry for cell composition. Mesenteric windows from old rats were isolated following exteriorization-induced (EI) hypoxic injury and intravenous injection of one of four cell therapies: (1) SVF from young or (2) old donors, (3) SVF from old donors depleted of or (4) enriched for T cells. Advancing age increased the SVF T-cell population but reduced revascularization following injury. Both young and aged SVF incorporated throughout the host mesenteric microvessels, but only young SVF significantly increased vascular area following EI. This study highlights the effect of donor age on SVF angiogenic efficacy and demonstrates how the ex vivo mesenteric-window model can be used in conjunction with SVF therapy to investigate its contribution to angiogenesis.
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Affiliation(s)
- Gabrielle Rowe
- Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky, USA,
- Department of Physiology, University of Louisville, Louisville, Kentucky, USA,
| | - David S Heng
- Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky, USA
| | - Jason E Beare
- Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky, USA
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, Kentucky, USA
| | - Nicholas A Hodges
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, USA
| | - Evan P Tracy
- Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky, USA
- Department of Physiology, University of Louisville, Louisville, Kentucky, USA
| | - Walter L Murfee
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, USA
| | - Amanda J LeBlanc
- Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky, USA
- Department of Cardiovascular and Thoracic Surgery, University of Louisville, Louisville, Kentucky, USA
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