Open Access

Effects of intermedin on proliferation, apoptosis and the expression of OPG/RANKL/M-CSF in the MC3T3-E1 osteoblast cell line

  • Authors:
    • Hongfei Ren
    • Hongyu Ren
    • Xue Li
    • Dongdong Yu
    • Shuai Mu
    • Zhiguang Chen
    • Qin Fu
  • View Affiliations

  • Published online on: September 15, 2015     https://doi.org/10.3892/mmr.2015.4328
  • Pages: 6711-6717
  • Copyright: © Ren et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Bone remodeling is a vital physiological process of healthy bone tissue in humans. It is characterized by the formation of bone by osteoblasts and its resorption by osteoclasts, and the bone resorbed by osteoclasts is replaced through the differentiation and activity of osteoblasts. Imbalances in this vital process lead to pathological conditions, including osteoporosis. Intermedin (IMD) as a newly discovered peptide in the calcitonin (CT) family of peptides, which shares similar functions with CT, calcitonin gene‑related peptide and amylin in bone resorption. However, the mechanism underlying its effect remains to be elucidated. This was investigated in the present study using the osteoblastic MC3T3‑E1 cell line, which was treated with different doses of IMD (0, 1, 10 and 100 nM). Cell proliferation, apoptosis and the expression of receptor activator of NF‑κB ligand (RANKL), osteoprotegerin (OPG) and macrophage colony‑stimulating factor (M‑CSF) were measured following treatment using multiple detection techniques, including an MTT assay, flow cytometry, reverse transcription‑quantitative polymerase chain reaction and western blot analysis. The resulting data demonstrated that IMD significantly inhibited the apoptosis of MC3T3‑E1 cells induced by serum‑free culture and dexamethasone, however, no significant effects on MC3T3‑E1 cell proliferation were observed. IMD had additional functions on the MC3T3‑E1 cells, including inhibition of the expression of RANKL and M‑CSF, and promotion of the expression of OPG. Previous studies have also demonstrated that RANKL and M‑CSF are two vital factor produced by osteoblasts to promote the maturation and differentiation of osteoclasts, and it has been reported that IMD can inhibit the osteoclast formation stimulated by RANKL and M‑CSF. Together with these findings, the present study concluded that IMD reduces bone resorption by inhibiting osteoblast apoptosis, decreasing the RANKL/OPG ratio and the expression of M-CSF, and inhibiting osteoclast maturation and differentiation.
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November-2015
Volume 12 Issue 5

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

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Spandidos Publications style
Ren H, Ren H, Li X, Yu D, Mu S, Chen Z and Fu Q: Effects of intermedin on proliferation, apoptosis and the expression of OPG/RANKL/M-CSF in the MC3T3-E1 osteoblast cell line. Mol Med Rep 12: 6711-6717, 2015.
APA
Ren, H., Ren, H., Li, X., Yu, D., Mu, S., Chen, Z., & Fu, Q. (2015). Effects of intermedin on proliferation, apoptosis and the expression of OPG/RANKL/M-CSF in the MC3T3-E1 osteoblast cell line. Molecular Medicine Reports, 12, 6711-6717. https://doi.org/10.3892/mmr.2015.4328
MLA
Ren, H., Ren, H., Li, X., Yu, D., Mu, S., Chen, Z., Fu, Q."Effects of intermedin on proliferation, apoptosis and the expression of OPG/RANKL/M-CSF in the MC3T3-E1 osteoblast cell line". Molecular Medicine Reports 12.5 (2015): 6711-6717.
Chicago
Ren, H., Ren, H., Li, X., Yu, D., Mu, S., Chen, Z., Fu, Q."Effects of intermedin on proliferation, apoptosis and the expression of OPG/RANKL/M-CSF in the MC3T3-E1 osteoblast cell line". Molecular Medicine Reports 12, no. 5 (2015): 6711-6717. https://doi.org/10.3892/mmr.2015.4328