Repression of IGF-I-induced osteoblast migration by (-)-epigallocatechin gallate through p44/p42 MAP kinase signaling

  • Authors:
    • Tetsu Kawabata
    • Haruhiko Tokuda
    • Go Sakai
    • Kazuhiko Fujita
    • Rie Matsushima-Nishiwaki
    • Takanobu Otsuka
    • Osamu Kozawa
  • View Affiliations

  • Published online on: August 8, 2018     https://doi.org/10.3892/br.2018.1140
  • Pages: 318-326
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Abstract

Polyphenolic compounds in beverages may have benefits in the prevention of osteoporosis. It has been demonstrated previously that insulin-like growth factor‑I (IGF-I) could stimulate the migration of osteoblasts. In the present study, it was investigated whether chlorogenic acid, a major polyphenol in coffee, and (-)-epigallocatechin gallate (EGCG), a major polyphenol in green tea, could affect this IGF-I‑stimulated migration of osteoblast-like MC3T3-E1 cells. The IGF-I‑stimulated osteoblast migration, evaluated by Transwell cell migration and wound-healing assays, was inhibited by EGCG but not chlorogenic acid. IGF-I induced the phosphorylation of p44/p42 mitogen-activated protein (MAP) kinase, p70 S6 kinase and Akt. The IGF-I-induced migration was suppressed by PD98059, a MAP kinase kinase 1/2 inhibitor, and deguelin, an Akt inhibitor, but not rapamycin, an inhibitor of the upstream kinase of p70 S6 kinase (mammalian target of rapamycin). EGCG attenuated the IGF-I-induced phosphorylation of p44/p42 MAP kinase but not Akt. Taken together, the present results suggest that EGCG inhibits IGF-I‑induced osteoblast migration via p44/p42 MAP kinase.
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October-2018
Volume 9 Issue 4

Print ISSN: 2049-9434
Online ISSN:2049-9442

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Spandidos Publications style
Kawabata T, Tokuda H, Sakai G, Fujita K, Matsushima-Nishiwaki R, Otsuka T and Kozawa O: Repression of IGF-I-induced osteoblast migration by (-)-epigallocatechin gallate through p44/p42 MAP kinase signaling. Biomed Rep 9: 318-326, 2018
APA
Kawabata, T., Tokuda, H., Sakai, G., Fujita, K., Matsushima-Nishiwaki, R., Otsuka, T., & Kozawa, O. (2018). Repression of IGF-I-induced osteoblast migration by (-)-epigallocatechin gallate through p44/p42 MAP kinase signaling. Biomedical Reports, 9, 318-326. https://doi.org/10.3892/br.2018.1140
MLA
Kawabata, T., Tokuda, H., Sakai, G., Fujita, K., Matsushima-Nishiwaki, R., Otsuka, T., Kozawa, O."Repression of IGF-I-induced osteoblast migration by (-)-epigallocatechin gallate through p44/p42 MAP kinase signaling". Biomedical Reports 9.4 (2018): 318-326.
Chicago
Kawabata, T., Tokuda, H., Sakai, G., Fujita, K., Matsushima-Nishiwaki, R., Otsuka, T., Kozawa, O."Repression of IGF-I-induced osteoblast migration by (-)-epigallocatechin gallate through p44/p42 MAP kinase signaling". Biomedical Reports 9, no. 4 (2018): 318-326. https://doi.org/10.3892/br.2018.1140