Wnt3a协同BMP9调控间充质干细胞成骨分化及机制研究

被引:9
作者
张晓 [1 ]
徐道晶 [2 ]
林良波 [1 ]
梁熙 [1 ]
黄伟 [1 ]
机构
[1] 重庆医科大学附属第一医院骨科
[2] 重庆医科大学临床检验诊断学重点实验室
关键词
骨形态发生蛋白9; Wnt3a; 间充质干细胞; 骨向分化;
D O I
暂无
中图分类号
R329.28 [];
学科分类号
摘要
目的:探讨经典Wnt信号通路与骨形态发生蛋白9(Bone morphogenetic protein 9,BMP9)诱导间充质干细胞(Mes-enchymal stem cells,MSCs)成骨的相互影响及分子机制。方法:以小鼠骨髓来源MSCs C3H10T1/2为目的细胞,用Wnt3a上调经典Wnt信号通路,联合BMP9作用于细胞,通过碱性磷酸酶(Alkaline phosphatase,ALP)活性测定、钙盐沉积实验、real time PCR、免疫细胞化学染色等方法观测BMP9与经典Wnt信号通路联合后对MSCs成骨分化的影响。结果:Wnt3a明显促进了BMP9诱导的ALP活性的增加[F=264.962,P=0.000;t(BMP9+Wnt3a)-BMP9=7.19,P=0.000;t(BMP9+Wnt3a)-Wnt3a=16.36,P=0.000],同时也明显增加了成骨标志物骨钙蛋白(Osteocalcin,OC)[F=3 920.102,P=0.000;t(BMP9+Wnt3a)-BMP9=39.10,P=0.000;t(BMP9+Wnt3a)-Wnt3a=62.56,P=0.000]和骨桥蛋白(Osteopontin,OPN)[F=1 935.824,P=0.000;t(BMP9+Wnt3a)-BMP9=40.88,P=0.000;t(BMP9+Wnt3a)-Wnt3a=56.42,P=0.000]的表达以及Runx2的mR-NA的表达[F=3 635.980,P=0.000;t(BMP9+Wnt3a)-BMP9=79.37,P=0.000;t(BMP9+Wnt3a)-Wnt3a=86.96,P=0.000],并且还促进了钙盐沉积。结论:Wnt3a与BMP9相互协同诱导MSCs的骨向分化,其中成骨转录因子Runx2可能作为二者的交汇点起了重要作用。
引用
收藏
页码:565 / 569
页数:5
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