Unphosphorylated heat shock protein 27 suppresses fibroblast growth factor‑2‑stimulated vascular endothelial growth factor release in osteoblasts

  • Authors:
    • Akira Kondo
    • Haruhiko Tokuda
    • Rie Matsushima-Nishiwaki
    • Kenji  Kato
    • Gen Kuroyanagi
    • Jun Mizutani
    • Muneyoshi Fukuoka
    • Ikuo Wada
    • Osamu Kozawa
    • Takanobu Otsuka
  • View Affiliations

  • Published online on: June 19, 2013     https://doi.org/10.3892/mmr.2013.1533
  • Pages: 691-695
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Abstract

Heat shock protein 27 (HSP27) also known as heat shock protein β1 (HSPB1) is a member of the family of small heat shock proteins ubiquitously expressed in all tissues. It has previously been demonstrated that HSP27 regulated the synthesis of osteocalcin and interleukin‑6 in osteoblast‑like MC3T3‑E1 cells. In the present study, the effect of HSP27 on basic fibroblast growth factor (FGF‑2)‑stimulated vascular endothelial growth factor (VEGF) synthesis in MC3T3‑E1 cells, was observed. The levels of VEGF release stimulated by FGF‑2 in the HSP27‑overexpressing MC3T3‑E1 cells were significantly lower compared with those in the control cells. In addition, the levels of VEGF release stimulated by FGF-2 in the phosphomimic HSP27-overexpressing cells were significantly higher compared with those in the non‑phosphorylatable HSP27‑overexpressing cells. Furthermore, no significant differences were observed in the FGF‑2‑induced phosphorylation levels of p44/p42 mitogen‑activated protein (MAP) kinase, p38 MAP kinase, stress‑activated protein kinase/c‑Jun N‑terminal kinase (SAPK/JNK) or p70 S6 kinase among the four types of transfected cells. These results suggested that unphosphorylated HSP27 attenuated the FGF‑2‑stimulated VEGF synthesis in osteoblasts.

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August 2013
Volume 8 Issue 2

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Copy and paste a formatted citation
APA
Kondo, A., Tokuda, H., Matsushima-Nishiwaki, R., Kato, K., Kuroyanagi, G., Mizutani, J. ... Otsuka, T. (2013). Unphosphorylated heat shock protein 27 suppresses fibroblast growth factor‑2‑stimulated vascular endothelial growth factor release in osteoblasts. Molecular Medicine Reports, 8, 691-695. https://doi.org/10.3892/mmr.2013.1533
MLA
Kondo, A., Tokuda, H., Matsushima-Nishiwaki, R., Kato, K., Kuroyanagi, G., Mizutani, J., Fukuoka, M., Wada, I., Kozawa, O., Otsuka, T."Unphosphorylated heat shock protein 27 suppresses fibroblast growth factor‑2‑stimulated vascular endothelial growth factor release in osteoblasts". Molecular Medicine Reports 8.2 (2013): 691-695.
Chicago
Kondo, A., Tokuda, H., Matsushima-Nishiwaki, R., Kato, K., Kuroyanagi, G., Mizutani, J., Fukuoka, M., Wada, I., Kozawa, O., Otsuka, T."Unphosphorylated heat shock protein 27 suppresses fibroblast growth factor‑2‑stimulated vascular endothelial growth factor release in osteoblasts". Molecular Medicine Reports 8, no. 2 (2013): 691-695. https://doi.org/10.3892/mmr.2013.1533