Résumé
Objective To investigate the feasibility of Ad-hTGF-β1 transfected bone marrow mesenchymal stem cell(BMSCs) into chondrocytes differentiation and the change of TAZ mRNA. Methods Rats BMSCs were obtained and cultured by whole bone marrow method, and then the third-generation cells were seeded into cell culture plate, and divided into three groups:Ad-hTGF-β1 transfected group,Ad-EGFP transfected group and the control group. The control group was added in common medium without any treatment while the other two groups were respectively added in serum-free medium containing Ad-hTGF-β1 or that containing Ad-EGFP. Seven days later, real-time fluorescent quantitation PCR and Western blot were employed for detecting the expression of TGF-β1 ,while immunohistochemical and Western blot for the expression of collagen Ⅱ , and real-time fluorescent quantitation PCR for the expression of TAZ mRNA. Results Seven days after the transfection, real-time fluorescent quantitation PCR revealed that the average relative expression of TGF-β1 was:Ad-hTGF-β1 group 0.863, Ad-EGFP group 0.183, and the control group 0.180; The average relative expression of TAZ was:Ad-hTGF-β1 group 0.810, Ad-EGFP group 0.416, and the control group 0.366.The expression difference of TGF-β1 and TAZ were statistically significant (P ＜ 0.05). Western blot and immunohistochemical proved strong collagen Ⅱ expression in Ad-hTGF-β1 group while it was detected a little in the other two groups. Conclusion BMSCs could be successfully and stably induced into chondrocytes differentiation by Ad-hTGF-β1. Meanwhile, the mRNA of TAZ is up regulate during the differentiation,so it is suppose that TGF-β1 improve BMSCs into chondrocytes differentiation by TAZ.