CGRP may regulate bone metabolism through stimulating osteoblast differentiation and inhibiting osteoclast formation

  • Authors:
    • Haitao He
    • Jianshen Chai
    • Shengfu Zhang
    • Linlin Ding
    • Peng Yan
    • Wenjun Du
    • Zhenzhou Yang
  • View Affiliations

  • Published online on: March 21, 2016     https://doi.org/10.3892/mmr.2016.5023
  • Pages: 3977-3984
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Abstract

Calcitonin-gene-related peptide (CGRP) is a neuropeptide, which is widely distributed throughout the central and peripheral nervous systems. Numerous mechanisms underlying the action of CGRP in osteoblast-associated cells have been suggested for bone growth and metabolism. The present study was designed to closely investigate the osteoblast‑ and osteoclast-associated mechanisms of the effect of CGRP administration on bone metabolism in primary osteoblasts. Primary osteoblasts were obtained from newborn rabbit calvaria and incubated with different concentrations of human CGRP (hCGRP), hCGRP and hCGRP (8‑37), or without treatment as a control. Intracellular calcium (Ca2+) and cyclic adenosine monophosphate (cAMP) were detected following treatment, as well as the expression levels of osteoblast differentiation markers, including activating transcription factor‑4 (ATF4) and osteocalcin (OC), and receptor activator of nuclear factor κB ligand (RANKL) and osteoprotegerin (OPG). The isolated primary osteoblasts were found to stain positively for ALP. hCGRP treatment had no significant effect on transient intracellular Ca2+ in the osteoblasts. Treatment of the osteoblasts with hCGRP led to elevations in the expression levels of cAMP, ATF4 and OPG, and downregulation in the expression of RANKL, in a dose‑dependent manner. These effects were markedly reversed by the addition of hCGRP (8‑37). The results of the present study demonstrated that CGRP administration not only stimulated osteoblast differentiation, as demonstrated by upregulated expression levels of ATF4 and OC in the hCGRP‑treated osteoblasts, but also inhibited OPG/RANKL‑regulated osteoclastogenesis. CGRP may act as a modulator of bone metabolism through osteoblast and osteoclast-associated mechanisms, which result in osteoblast formation with subsequent activation of bone formation.
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May-2016
Volume 13 Issue 5

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
He H, Chai J, Zhang S, Ding L, Yan P, Du W and Yang Z: CGRP may regulate bone metabolism through stimulating osteoblast differentiation and inhibiting osteoclast formation. Mol Med Rep 13: 3977-3984, 2016.
APA
He, H., Chai, J., Zhang, S., Ding, L., Yan, P., Du, W., & Yang, Z. (2016). CGRP may regulate bone metabolism through stimulating osteoblast differentiation and inhibiting osteoclast formation. Molecular Medicine Reports, 13, 3977-3984. https://doi.org/10.3892/mmr.2016.5023
MLA
He, H., Chai, J., Zhang, S., Ding, L., Yan, P., Du, W., Yang, Z."CGRP may regulate bone metabolism through stimulating osteoblast differentiation and inhibiting osteoclast formation". Molecular Medicine Reports 13.5 (2016): 3977-3984.
Chicago
He, H., Chai, J., Zhang, S., Ding, L., Yan, P., Du, W., Yang, Z."CGRP may regulate bone metabolism through stimulating osteoblast differentiation and inhibiting osteoclast formation". Molecular Medicine Reports 13, no. 5 (2016): 3977-3984. https://doi.org/10.3892/mmr.2016.5023