Journal
CELLS TISSUES ORGANS
Volume 197, Issue 2, Pages 103-113Publisher
KARGER
DOI: 10.1159/000342921
Keywords
Wound healing; Stromal cell-derived factor-1; Bone marrow-derived stromal stem cells; Neovascularization
Funding
- Major State Basic Research Development Program of China (973 Program) [2012CB518105]
- Natural Science Foundation Project of CQ CSTC [CSTC-2010BB5036, CSTC-2011AC5035]
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Stromal cell-derived factor-1 (SDF-1) is a potent chemokine for bone marrow-derived stromal stem cells (BMSCs) that express CXCR4, the receptor for SDF-1. SDF-1 is considered to play an important role in the trafficking of BMSCs. We investigated the contribution of SDF-1 to the recruitment of BMSCs to the wound area and its promotion of wound repair and neovascularization. BMSCs were pretreated with or without anti-CXCR4 blocking antibody and combined with CM-Dil label, and injected via the tail vein into mice with full-thickness skin wounds on the dorsum. Simultaneously, anti-SDF-1 antibody was injected into local wounds in another group of mice. The results show that blockade of CXCR4 on either infused BMSCs or SDF-1 in the host wounds (1) dramatically impaired the number of infused BMSCs being recruited to the injured tissue, (2) reduced the expression of growth factors involved in the repair of injured tissue such as vascular endothelial growth factor, basic fibroblast growth factor and transforming growth factor beta 1, (3) decreased the resultant neovascularization, and (4) retarded wound healing. Taken together, the findings indicate that the SDF-1/CXCR4 signal pathway facilitates wound healing through augmenting BMSC recruitment to wound tissues, responsive secretion of growth factors by BMSCs and neovascularization in the wound area. Copyright (c) 2012 S. Karger AG, Basel
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