Targeted delivery of adipose-derived stem cells via acellular dermal matrix enhances wound repair in diabetic rats.

Published on Mar 1, 2015in Journal of Tissue Engineering and Regenerative Medicine3.078
· DOI :10.1002/TERM.1622
Chunlei Nie6
Estimated H-index: 6
(HMU: Harbin Medical University),
Guoyou Zhang1
Estimated H-index: 1
(University of Lübeck)
+ 4 AuthorsJiewu Zhang2
Estimated H-index: 2
(HMU: Harbin Medical University)
Sources
Abstract
Cell-based therapeutic intervention has emerged as a new approach to accelerate wound closure. Adipose-derived stem cells (ASCs), as a fascinating cell source, have received much attention in tissue repair and regeneration. In this study we evaluated the potential of acellular dermal matrix (ADM) scaffold serving as a carrier for the delivery of ASCs and investigated its therapeutic effects on wound healing. First, ASCs were isolated and characterized for multidifferentiation potential. ASCs–ADM grafts were then prepared, and ADM scaffold was shown to support the in vitro growth and proliferation of ASCs. Next, we analysed paracrine factors in conditioned medium and found that ASCs–ADM grafts secreted various cytokines, including VEGF, HGF, TGFβ and bFGF. Moreover, ASCs–ADM conditioned medium notably stimulated the migration and proliferation of fibroblasts. In vivo, we established an excisional wound model in diabetic rats which received phosphate-buffered saline (PBS), ADM or ASCs–ADM grafts, respectively. Our results demonstrated that implantation of ASCs–ADM significantly enhanced tissue regeneration and increased epithelialization, resulting in accelerated wound closure. Immunofluorescence analysis further indicated that capillary density was evidently increased in the ASCs–ADM group compared with the control or ADM group. In addition, western blot analysis showed that ASCs–ADM significantly increased the expression of angiogenic factors, which was consistent with in vitro data. Taken together, our results suggest that targeted delivery of ASCs via ADM scaffold accelerate diabetic wound healing through a paracrine mechanism, with enhanced granulation tissue formation and increased re-epithelialization and neovascularization. Copyright © 2012 John Wiley & Sons, Ltd.
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