Osteocalcin promotes proliferation, differentiation, and survival of PC12 cells

Eika Ando, Sen Higashi, Akiko Mizokami, Seiji Watanabe, Masato Hirata, Hiroshi Takeuchi

Research output: Contribution to journalArticlepeer-review

Abstract

Involvement of the bone matrix protein osteocalcin (OC) in the development of learning and memory, and the prevention of anxiety-like behaviors in mice. However, the direct effects of OC on neurons are still unknown comparing to the mechanism how OC affects systemic energy expenditure and glucose homeostasis. In this study, we investigated the effect of OC on proliferation, differentiation, and survival of neurons using the rat pheochromocytoma cell line PC12. RT-PCR analysis for OC receptor candidates revealed that Gpr158, but not Gprc6a, mRNA was expressed in PC12 cells. The growth of PC12 cells cultured in the presence of 5–50 ng/mL of either uncarboxylated (GluOC) or carboxylated (GlaOC) OC was increased compared to cells cultured in the absence of OC. In addition, NGF-induced neurite outgrowth was enhanced by OC, and H2O2-induced cell death was suppressed by pretreatment with OC. All of these results were observed for both GluOC and GlaOC at comparable levels, suggesting that OC may directly affect cell proliferation, differentiation, and survival by binding to its candidate receptor, GPR158.

Original languageEnglish
Pages (from-to)174-179
Number of pages6
JournalBiochemical and Biophysical Research Communications
Volume557
DOIs
Publication statusPublished - Jun 11 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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