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玻璃粘连蛋白对大鼠骨髓间充质干细胞成骨分化的影响
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摘要
目的:体外分离纯化培养大鼠骨髓间充质干细胞(rMSC),并进一步研究玻璃粘连蛋白(vitronectin VN)在干细胞向成骨方向分化过程中的作用。方法:贴壁分离培养法分离纯化rMSC,再用以玻璃粘连蛋白包被的培养板培养,定期检测碱性磷酸酶活性,钙结节的形成。结果:经贴壁筛选法分离的rMSC生长曲线呈S型,第3、4、5代细胞排列具有典型的漩涡状结构,表达CD44、CD90,不表达CD34,电镜观察为低分化细胞,用以玻璃粘连蛋白包被的培养板培养12天,碱性磷酸酶染色呈阳性,硝酸银染色显示有钙结节形成。结论:玻璃粘连蛋白有诱导rMSC向成骨方向分化的能力。
Objective:TO isolate, purify and amplify of rat mesenehymal stem cells (rMSCs)in vitro, and further studying the effect of vitronectin (VN)on osteogenic diferentiation of rat mesenchymalstem cells. Methods:RMSCs were isolated and purified by wall adhesion culture procedure and passaged in vitro. The cells of the third passage were cultured in cultureplates coated by vitronectin, and detecting calcifying nodule and alkaline phosphatase (ALP) activity regularly. Rsults:The rMSCs grows the curve reports the S form, and 3rd,4th and 5th generation were very purified and all in the whirlpool-shape through isolation, purification and araplitieation. These cultured cells showed immunoreactivity to CD44 and CD90 but not CD34 and low-differentiation under the electron microscopy. The ALP expression and calcifying nodule were strongly positive of there cells cultured 12 days in cultureplates coated by vitronectin. Conclusion:Vitronectin has the ability of inducing osteogenic diferentiation of rat mesenchymalstem cells.
引文
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