Expression of activating transcription factor 4 in osteogenic induction of bone marrow mesenchymal stem cells
10.3969/j.issn.2095-4344.2014.01.004
- VernacularTitle:骨髓间充质干细胞诱导成骨细胞模型中活化转录因子4基因的表达
- Author:
Dan WU
;
Suling LI
;
Lu WANG
;
Ling XU
;
Huaju XIANG
- Publication Type:Journal Article
- Keywords:
stem cells;
mesenchymal stem cells;
osteoblasts;
activating transcription factor 4
- From:
Chinese Journal of Tissue Engineering Research
2014;(1):21-26
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND:Activating transcription factor 4 is found as an activating factor that can regulate osteogenic differentiation and function, and plays a critical role in the osteogenic differentiation.
OBJECTIVE:To investigate the expression and significance of activating transcription factor 4 in the osteogenic differentiation of bone marrow mesenchymal stem cells from Sprague-Dawley rats.
METHODS:Bone marrow mesenchymal stem cells from Sprague-Dawley rats were cultured using the whole bone marrow adherence method, and ossification revulsant was added to induce passage 3 cells. cells with no osteogenic induction served as controls. RT-PCR and western blot assay were employed to dynamical y monitor expression of activating transcription factor 4.
RESULTS AND CONCLUSION:RT-PCR results showed that activating transcription factor 4 mRNA expression increased with the increasing osteogenic differentiation, and peaked at day 16. Western blot analysis showed that the protein expression of activating transcription factor 4 tended to increase with the increasing osteogenic differentiation, peaked at day 16 and stil maintained at a higher level at day 19. Compared with the uninduced cells, activating transcription factor 4 in the induced cells exhibited a higher expression at mRNA and protein levels (P<0.05). These findings indicate that activating transcription factor 4 expression is elevated during osteogenic differentiation, showing a positive correlation with osteogenic ability of bone marrow mesenchymal stem cells.
