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Bioenergetic Profile Experiment using C2C12 Myoblast Cells
07:20

Bioenergetic Profile Experiment using C2C12 Myoblast Cells

Published on: December 6, 2010

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SOCS2 inhibited mitochondria biogenesis via inhibiting p38 MAPK/ATF2 pathway in C2C12 cells

Lu Gan1, Zhenjiang Liu, Zhenzhen Zhang

  • 1College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, Shaanxi, China.

Molecular Biology Reports
|December 20, 2013
PubMed

Insights

Suppressor of cytokine signaling 2 (SOCS2) inhibits myotube formation and mitochondrial biogenesis by suppressing the p38 MAPK pathway. SOCS2 overexpression reduced mitochondrial potential and cytochrome c, while interference had opposite effects.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Muscle Physiology

Background:

  • Mitochondrial biogenesis is crucial for cellular energy production and muscle function.
  • The role of Suppressor of Cytokine Signaling 2 (SOCS2) in regulating mitochondrial biogenesis and muscle differentiation requires further elucidation.

Purpose of the Study:

  • To investigate the mechanism by which SOCS2 influences mitochondrial biogenesis and myogenesis in C2C12 cells.
  • To determine the effect of SOCS2 on key markers of muscle differentiation and mitochondrial function.

Main Methods:

  • Transfection of C2C12 cells with SOCS2 over-expression and RNA interference vectors.
  • Analysis of muscle differentiation markers (MyHC, MyoD, MyoG), MSTN, and mitochondrial biogenesis regulators (PGC-1α, MDH, CPT-1, UCP1).
  • Assessment of mitochondrial membrane potential (JC-1 dyeing), cytochrome c expression, and p38 MAPK/ATF2 phosphorylation.

Main Results:

  • SOCS2 over-expression inhibited C2C12 cell differentiation and reduced MyHC, MyoD, and MyoG expression, while increasing MSTN.
  • RNA interference of SOCS2 elevated PGC-1α, MDH, and CPT-1 expression, whereas SOCS2 over-expression decreased them. UCP1 expression remained unchanged.
  • SOCS2 over-expression decreased mitochondrial membrane potential and increased cytochrome c, while SOCS2 interference showed opposite effects. SOCS2 modulated p38 MAPK and ATF2 phosphorylation.

Conclusions:

  • SOCS2 suppresses myotube formation and acts as an anti-regulator of mitochondrial biogenesis.
  • The inhibitory effect of SOCS2 on mitochondrial biogenesis is mediated through the p38 MAPK signaling pathway.

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