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Generation of Mesenchymal Stem Cells from Human Umbilical Cord Tissue and their Differentiation into the Skeletal Muscle Lineage
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[The role of p38 on the differentiation of MSCs to myoblasts]

Jin Wang1, Cheng-Ji Luo, Xin-Ze Ran

  • 1State Key Laboratory of Tranuma, Burns and Combined Injury, Institute of Combined Injury of PLA, College of Preventive Medicine, Third Military Medical University, Chongqing 400038.

Zhongguo Ying Yong Sheng Li Xue Za Zhi = Zhongguo Yingyong Shenglixue Zazhi = Chinese Journal of Applied Physiology
|December 17, 2010
PubMed
Abstract

Insights

Mesenchymal stem cells (MSCs) differentiate into myoblasts using 5-azacytidine (5-Aza-CR), with p38 signaling playing a key role in this process. Myf5 expression and myosin production were observed during differentiation.

Area of Science:

  • Stem cell biology
  • Cell differentiation
  • Molecular signaling

Background:

  • Mesenchymal stem cells (MSCs) are multipotent stromal cells with the potential to differentiate into various cell types.
  • Myoblasts are immature muscle cells that play a crucial role in muscle regeneration and development.
  • Understanding the molecular mechanisms regulating MSC differentiation into myoblasts is essential for regenerative medicine applications.

Purpose of the Study:

  • To investigate the differentiation of MSCs into myoblasts induced by 5-azacytidine (5-Aza-CR).
  • To examine the expression of the myogenic regulatory factor Myf5 during this differentiation process.
  • To elucidate the role of the p38 signal transduction pathway in MSC-to-myoblast differentiation.

Main Methods:

  • Bone marrow-derived MSCs were isolated and purified.
  • MSCs were induced to differentiate into myoblasts using 10 µmol/L 5-Aza-CR.
  • Myf5 gene expression was assessed using RT-PCR.
  • Myosin antigen expression was evaluated by immunohistochemistry.
  • Phosphorylation of p38 was analyzed using Western blot, with and without SB203580 inhibition.

Main Results:

  • MSCs initiated Myf5 expression on day 9 following SB203580 inhibition.
  • Myosin expression was detected in some MSCs by day 7 post-induction.
  • 5-Aza-CR treatment enhanced phosphorylation of p38, which was significantly reduced by SB203580.

Conclusions:

  • 5-Aza-CR effectively induces MSCs to express myogenic regulatory factors and differentiate into myoblasts.
  • The p38 signaling pathway plays a positive role in mediating MSC differentiation into myoblasts.

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