Loading...
Genipin-Cross-Linked Microencapsulated Human Adipose Stem Cells Augment Transplant Retention Resulting in Attenuation of Chronically Infarcted Rat Heart Fibrosis and Cardiac Dysfunction
Paul, Arghya Chen, Guangyong Khan, Afshan Afsar Rao, Vijayaraghava T. Shum-Tim, Dominique Prakash, Satya
Paul, Arghya
Chen, Guangyong
Khan, Afshan Afsar
Rao, Vijayaraghava T.
Shum-Tim, Dominique
Prakash, Satya
Citations
Altmetric:
Abstract
Stem cell transplantation has been widely acknowledged for their immense potential in regenerative medicine. In these procedures, the implanted cells need to maintain both their viability and functional properties for effective therapeutic outcomes. This has long been a subject of major concern and intensive studies. Microencapsulation of stem cells within polymeric microcapsules can be an efficient approach to achieve this goal, particularly for heart diseases. This study reports the use of biocompatible, fluorogenic genipin-cross-linked alginate chitosan (GCAC) microcapsules in delivery of human adipose stem cells (hASCs) with an aim to increase the implant retention in the infarcted myocardium for maximum clinical benefits. In vitro results show, under hypoxic conditions, the microencapsulated cells overexpressed significantly higher amount of biologically active vascular endothelial growth factor (VEGF). We investigated on the in vivo potential using immunocompetent female rats after induction of myocardial infarction. For this, animal groups (n = 8) received empty control microcapsules, 1.5 × 106 free male hASCs, or 1.5 × 106 microencapsulated male hASCs. Results show significant retention (3.5 times higher) of microencapsulated hASCs compared to free hASCs after 10 weeks of transplantation. Microencapsulated hASCs showed significantly attenuated infarct size compared to free hASCs and empty microcapsule group (21.6% ± 1.1% vs. 27.2% ± 3.1% vs. 33.3% ± 3.2%; p < 0.05), enhanced vasculogenesis, and improved cardiac function (fractional shortening: 24.2% ± 2.1% vs. 19.1% ± 0.5% vs. 12.0% ± 4.0%; p < 0.05). These data suggest that microencapsulated hASCs can contribute significantly to the improvement in cardiac functions. Their greater retentions exhibit reduced fibrosis and cardiac dysfunction in experimental animals. However, further research is needed to fully comprehend the underlying biological and immunological effects of microencapsulated hASCs, which jointly play important roles in cardiac repair.
Description
Date
2012
Journal Title
Journal ISSN
Volume Title
Publisher
Cognizant Communication Corporation
Research Projects
Organizational Units
Journal Issue
Keywords
Adipose stem cell therapy, Cell transplant, Microencapsulation, Myocardial infarction, Regenerative medicine, Tissue engineering
Citation
Paul, Arghya, Guangyong Chen, Afshan Khan, Vijayaraghava T. S. Rao, Dominique Shum-Tim, and Satya Prakash. "Genipin-Cross-Linked Microencapsulated Human Adipose Stem Cells Augment Transplant Retention Resulting in Attenuation of Chronically Infarcted Rat Heart Fibrosis and Cardiac Dysfunction." Cell Transplantation Cell Transplant 21.12 (2012): 2735-751. http://dx.doi.org/10.3727/096368912X637497