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Over-expression of Sox2 in C3H10T1/2 cells inhibits osteoblast differentiation through Wnt and MAPK signalling

Daofang Ding1, Hao Xu, Qianqian Liang

  • 1Institute of Spine, Shanghai University of Traditional Chinese Medicine, 725 South Wan-Ping Road, Shanghai, 200032, People's Republic of China.

International Orthopaedics
|October 21, 2011
PubMed
Abstract

Insights

Sox2 promotes proliferation but inhibits osteoblast differentiation in C3H10T1/2 cells. This suggests Sox2 plays a role in mesoderm development beyond its known function in ectoderm.

Area of Science:

  • Stem cell biology
  • Developmental biology
  • Molecular biology

Background:

  • Sox proteins are crucial for mesoderm and ectoderm development.
  • Sox2 is vital for self-renewal in embryonic stem cells (ES) and neural stem cells (NSCs).

Purpose of the Study:

  • To investigate Sox2's role in mesoderm development.
  • To determine if Sox2 influences osteoblast differentiation in C3H10T1/2 cells.

Main Methods:

  • Recombinant retrovirus expressing Sox2 was used to infect C3H10T1/2 cells.
  • Analyzed cell proliferation, alkaline phosphatase (ALP) staining, mineralized nodules, osteogenic gene expression, and signaling pathways (Wnt/β-catenin, p38MAPK).

Main Results:

  • Sox2 over-expression increased C3H10T1/2 cell proliferation and activated Wnt/β-catenin and p38MAPK pathways.
  • Osteogenic differentiation was inhibited: reduced ALP and mineralized nodules, down-regulated osteogenic genes, and suppressed Wnt/β-catenin and p38MAPK pathways.

Conclusions:

  • Sox2 over-expression promotes proliferation in C3H10T1/2 cells.
  • Sox2 over-expression inhibits osteoblast differentiation in these cells.
  • These findings indicate Sox2's involvement in mesoderm development.

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