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- W3029126839 abstract "目的 探讨转转化生长因子-β(TGF-β)基因的骨髓基质干细胞(BMSCs)在RGD多肽表面修饰的聚乳酸-羟基乙酸(PLGA)材料上的增殖、黏附、分化情况,以研究TGF-β基因和RGD多肽在调控种子细胞生物学行为方面的作用. 方法将GRGDSPC多肽共价结合到改性PLGA支架材料上,把TGF-β基因转入BMSCs,以单纯PLGA支架材料、单纯BMSCs作为对照,分别将单纯BMSCs和转TGF-β基因BMSCs两组细胞种植于两种材料上,培养1、2、3 d后,计数细胞密度以反映细胞增殖情况:接种后4、12 h,沉淀法定量检测黏附的细胞数;培养24 h后用FITC连接的鬼笔环肽对细胞骨架染色,观察细胞骨架的组织情况;用成骨性培养基培养7、14、21 d,检测细胞中碱性磷酸酶(ALP)活性来了解BMSCs分化情况. 结果转TGF-β基因细胞密度显著增大,且在各时间点有较高的ALP活性.RGD多肽修饰的PLGA材料上细胞黏附率高,并有较高的荧光素密度及较粗大的细胞骨架,且在第14天时表现出高的ALP活性.结论 TGF-β基因和RGD多肽同时应用有利于BMSCs黏附到支架材料上,并能促进其增殖和向成骨细胞方向分化。" @default.
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- W3029126839 date "2008-01-15" @default.
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- W3029126839 title "Growth of mesenchymal stem cells transfected by transforming growth factor β gene on PLGA scaffold modified with RGD peptide" @default.
- W3029126839 doi "https://doi.org/10.3760/cma.j.issn.1671-7600.2008.01.014" @default.
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