Release of hepatocyte growth factor from mechanically stretched skeletal muscle satellite cells and role of pH and nitric oxide

Ryuichi Tatsumi, Akihito Hattori, Yoshihide Ikeuchi, Judy E. Anderson, Ronald E. Allen

研究成果: Contribution to journalArticle査読

208 被引用数 (Scopus)

抄録

Application of mechanical stretch to cultured adult rat muscle satellite cells results in release of hepatocyte growth factor (HGF) and accelerated entry into the cell cycle. Stretch activation of cultured rat muscle satellite cells was observed only when medium pH was between 7.1 and 7.5, even though activation of satellite cells was accelerated by exogenous HGF over a pH range from 6.9 to 7.8. Furthermore, HGF was only released in stretched cultures when the pH of the medium was between 7.1 and 7.4. Conditioned medium from stretched satellite cell cultures stimulated activation of unstretched satellite cells, and the addition of anti-HGF neutralizing antibodies to stretch-conditioned medium inhibited the stretch activation response. Conditioned medium from satellite cells that were stretched in the presence of nitric-oxide synthase (NOS) inhibitor Nω-nitro-L-arginine methyl ester hydrochloride did not accelerate activation of unstretched control satellite cells, and HGF was not released into the medium. Conditioned medium from unstretched cells that were treated with a nitric oxide donor, sodium nitroprusside dihydrate, was able to accelerate the activation of satellite cells in vitro, and HGF was found in the conditioned medium. Immunoblot analysis indicated that both neuronal and endothelial NOS isoforms were present in satellite cell cultures. Furthermore, assays of NOS activity in stretched satellite cell cultures demonstrated that NOS is stimulated when satellite cells are stretched in vitro. These experiments indicate that stretch triggers an intracellular cascade of events, including nitric oxide synthesis, which results in HGF release and satellite cell activation.

本文言語英語
ページ(範囲)2909-2918
ページ数10
ジャーナルMolecular biology of the cell
13
8
DOI
出版ステータス出版済み - 8 2002
外部発表はい

All Science Journal Classification (ASJC) codes

  • 分子生物学
  • 細胞生物学

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