间充质干细胞通过旁分泌效应激活心脏干细胞迁移(英文)

被引:4
作者
计流 [1 ,2 ,3 ]
徐夏 [1 ,2 ,3 ]
王家镜 [1 ,2 ,3 ]
张世强 [1 ,2 ,3 ]
刘书林 [1 ,2 ,3 ]
李茜 [1 ,2 ,3 ]
唐俊明 [1 ,2 ]
王家宁 [1 ]
杨建业 [1 ]
张蕾 [1 ]
郑飞 [1 ]
孔霞 [1 ]
郭凌郧 [1 ]
黄永章 [1 ]
陈世友 [4 ]
机构
[1] 湖北医药学院附属人民医院临床医学研究所及心内科
[2] 湖北医药学院生理学教研室及胚胎干细胞研究湖北省重点实验室
[3] 湖北医药学院药护学院
[4] 佐治亚大学生理及药理学系
关键词
心肌梗死; 间充质干细胞; 心脏干细胞; 迁移; 旁分泌;
D O I
暂无
中图分类号
R542.22 [];
学科分类号
1002 ; 100201 ;
摘要
目的:探索移植到心梗部位的间充质干细胞是否通过其旁分泌效应促进心脏干细胞迁移至心梗部位。方法:间充质干细胞(MSC)特征经流式细胞术鉴定其表面标志物特征及多向诱导分化实验确认其干性。经体外Transwell分析心脏干细胞迁移特征,利用VEGF,HGF及SDF-1α等受体特异阻断剂观察其在心脏干细胞迁移中的作用。在体利用左冠状动脉前降之结扎法复制心肌梗死模型。心梗后7 d,植入MSC到心梗及周边部位。细胞移植7 d后,流式细胞术分析其外周血中c-kit阳性的干细胞含量,免疫荧光组织化学技术分析心梗部位c-kit阳性的干细胞数目,同时行Western Blot分析心脏VEGF,HGF及SDF-1α的表达,一月后心导管技术测量心功能及胶原染色和HE染色确定梗死面积。结果:移植的MSC增加了心梗部位VEGF,HGF及SDF-1α的表达,并动员c-kit阳性的干细胞迁移至心梗部位。与对照组相比,MSC移植组明显降低了心梗面积,显著增加了血管密度,明显改善了左室心脏功能。体外迁移实验发现MSC条件培养基能够诱导心脏干细胞迁移,这个过程能被VEGFR、CXCR4及c-Met等受体特异阻断剂所阻断,且c-Met可能起主要作用。结论:移植的MSC通过其旁分泌效应激活c-kit阳性的干细胞迁移至心梗部位修复受损的心脏。
引用
收藏
页码:277 / 284+258 +258
页数:9
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