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载基因基质材料转染骨髓基质干细胞的实验研究 被引量:5

Transfection and expression of transforming growth factor β1 gene in bone marrow stromal cells by gene activated biomimetic polymer matrix
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摘要 目的 评价载基因仿生基质材料能否转染骨髓基质干细胞 (BMSCs)并表达具有生物学活性的转化生长因子 (TGF) β1。 方法 将配体 /聚赖氨酸 /改性聚 (丙交酯 /乙交酯 )非病毒基因转染体系与TGF β1基因复合 ,制备成载基因仿生基质材料 ,用改良的Friedenstein分层离心法分离培养BMSCs。通过TGF β1敏感细胞株MV1生长抑制法检测。 结果 实验组不同时间点之活化上清均使MV1增殖受到不同程度的抑制 ,其中以第 2、3天为最强 ,与对照组比较差异有显著性(P <0 .0 5 )。结论 这种载基因基质材料既可以作为特异性地针对BMSCs的非病毒基因转染载体 ,又可以作为骨组织工程支架材料 ,可能为具有多重生物学效应的TGF β1的持续高效发挥作用提供一种崭新的方法。 Objective To evaluate whether transforming growth factor β1 (TGF β1) gene could be transfected and expressed in bone marrow stromal cells (BMSCs) by TGF β1 gene activated biomimetic polymer matrix (GAM).Methods TGF β1 GAM,[K] 16 GRGDSPC TGF β1/PLGA [ASP PEG],were manufactured by a new kind of nonviral local gene delivery system,[K] 16 GRGDSPC/PLGA [ASP PEG],and TGF β1 gene.The expression and bioactivity of TGF β1gene in BMSCs were examined by TGF β1 sensitive cell MV1.Results The HCL activated culture medium in the pcDNA3 TGF β1 GAM experiment groups could inhibit the proliferation of MV1 significantly at different time points as compared with that of pcDNA3 GAM control groups ( P < 0.01). Conclusion This new kind of gene activated biomimetic matrix for bone tissue engineering is a new kind of nonviral local gene delivery system which can transfect the multifunctional TGF β1 gene into BMSCs effectively and specifically.
出处 《中华实验外科杂志》 CAS CSCD 北大核心 2004年第12期1520-1521,共2页 Chinese Journal of Experimental Surgery
基金 国家自然科学基金项目 ( 30 4 70 4 83 30 2 0 0 0 63) 湖北省自然科学基金项目 ( 2 0 0 2AB1 34)
关键词 载基因基质材料 细胞转染 骨髓基质干细胞 医学实验 骨组织工程 Bone tissue engineering Biomimetic material Nonviral gene delivery system Transforming growth factr-β1
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