宗兆文,程天民,冉新泽,李楠,董世武,艾国平,粟永萍.移植dMSCs向放创复合伤创面优势分布的机制研究[J].中华放射医学与防护杂志,2006,26(4):313-316
移植dMSCs向放创复合伤创面优势分布的机制研究
Study on mechanisms of preferential distribution of the transplanted dermal multipotent stem cells in rats with combined radiation and wound injury
投稿时间:2006-01-08  
DOI:
中文关键词:  真皮多能干细胞  放创复合伤  分布  基质细胞源性因子-1
英文关键词:Dermal multipotent stem cell  Combined radiation and wound injury  Distribution  Stromal-dereived factor-1
基金项目:国家重点基础研究发展规划(973计划)资助项目(2005CB522605);国家自然科学基金资助项目(30500141);第三军医大学科研基金资助项目(XG200509)
作者单位E-mail
宗兆文 400038重庆, 第三军医大学预防医学院全军复合伤研究所, 创伤、烧伤与复合伤国家重点实验室 suyongping@yahoo.com.cn 
程天民 400038重庆, 第三军医大学预防医学院全军复合伤研究所, 创伤、烧伤与复合伤国家重点实验室  
冉新泽 400038重庆, 第三军医大学预防医学院全军复合伤研究所, 创伤、烧伤与复合伤国家重点实验室  
李楠 400038重庆, 第三军医大学预防医学院全军复合伤研究所, 创伤、烧伤与复合伤国家重点实验室  
董世武 400038重庆, 第三军医大学预防医学院全军复合伤研究所, 创伤、烧伤与复合伤国家重点实验室  
艾国平 400038重庆, 第三军医大学预防医学院全军复合伤研究所, 创伤、烧伤与复合伤国家重点实验室  
粟永萍 400038重庆, 第三军医大学预防医学院全军复合伤研究所, 创伤、烧伤与复合伤国家重点实验室  
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中文摘要:
      目的 探讨静脉输注的真皮多能干细胞(dermal multipotent stemcells,dMSCs)向放创复合伤大鼠创面优势分布的机制。方法 RT-PCR和免疫组织化学检测创面中基质细胞源性细胞因子(stromal-dereivedfactor-1,SDF-1)的表达水平,以及dMSCs中SDF-1受体CXCR4的表达水平。Transwell培养体系中,观察SDF-1对dMSCs的趋化作用。结果 放创复合伤大鼠创面SDF-1的表达水平明显高于正常大鼠,同时dMSCs表达CXCR4。体外趋化实验发现,SDF-1对dMSCs有很强的趋化作用,而使用SDF-1的中和性抗体后,放创复合伤大鼠伤口液对dMSCs的趋化作用明显下降(P<0.05)。结论 放创复合伤大鼠创面上调表达的SDF-1在移植dMSCs向创面的优势分布中有重要作用。
英文摘要:
      Objective To explore the mechanisms of preferential distribution of transplanted dermal multipotent stem cells (dMSCs) to surface of wound in rats with combined radiation and wound injury (CRWI). Methods The expression of stromal-dereived factor-1 (SDF-1) in wounds of rats and the expression of CR4 (the only known receptor of SDF-1) in dMSCs were examined using RT-PCR and immunohistochemistry. The chemotactic effect of SDF-1 on dMSCs was evaluated in Transwell culture system. Results The expression of SDF-1 in wound of CRWI rats was upregulated significantly compared with the normal rats'skin. dMSCs expressed CR4. SDF-1 had a strong chemotactic effect on dMSCs; the chemotactic effect of wound extracts from CRWI rats was significantly reduced (P<0.05) when neutralized antibody to SDF-1 was added. Conclusion The upregulated expression of SDF-1 played an important role in the preferential distribution of transplanted dMSCs to wound in rats with CRWI.
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