Hypoxia induces adipogenic differentitation of myoblastic cell lines

Yoshiaki Itoigawa, Koshi Kishimoto, Hiroshi Okuno, Hirotaka Sano, Kazuo Kaneko, Eiji Itoi

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Muscle atrophy usually accompanies fat accumulation in the muscle. In such atrophic conditions as back muscles of kyphotic spine and the rotator cuff muscles with torn tendons, blood flow might be diminished. It is known that hypoxia causes trans-differentiation of mesenchymal stem cells derived from bone marrow into adipocytes. However, it has not been elucidated yet if hypoxia turned myoblasts into adipocytes. We investigated adipogenesis in C2C12 and G8 murine myogenic cell line treated by hypoxia. Cells were also treated with the cocktail of insulin, dexamethasone and IBMX (MDI), which has been known to inhibit Wnt signaling and promote adipogenesis. Adipogenic differentiation was seen in both hypoxia and MDI. Adipogenic marker gene expression was assessed in C2C12. CCAAT/enhancer-binding protein (C/EBP) β, α and peroxisome proliferator activating receptor (PPAR) γ were increased by both hypoxia and MDI. The expression profile of Wnt10b was different between hypoxia and MDI. The mechanism for adipogenesis of myoblasts in hypoxia might be regulated by different mechanism than the modification of Wnt signaling.

Original languageEnglish
Pages (from-to)721-726
Number of pages6
JournalBiochemical and biophysical research communications
Volume399
Issue number4
DOIs
Publication statusPublished - 2010 Sep 1

Keywords

  • Adipogenesis
  • C2C12
  • G8
  • Hypoxia
  • Myoblasts
  • Wnt10b

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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