Synergistic action of statins and nitrogen-containing bisphosphonates in the development of rhabdomyolysis in L6 rat skeletal myoblasts

Sumio Matzno, Tomoko Nishiguchi, Takeshi Akiyoshi, Setsuko Anami, Toshikatsu Nakabayashi, Kenji Matsuyama

研究成果: Article査読

9 被引用数 (Scopus)

抄録

Objectives: Nitrogen-containing bisphosphonates, which are widely used to treat osteoporosis, act as inhibitors of farnesyl pyrophosphate synthase, one of the key enzymes of the mevalonate pathway, and thus may have the potential to enhance the effect of statins (inhibitors of 3-hydroxy-3-methylglutaryl coenzyme A reductase). In this study, we evaluated the synergistic effect of two nitrogen-containing bisphosphonates, alendronate and risedronate, in statin-induced apoptosis in rat skeletal L6 myoblasts. Methods: L6 rat myoblasts were differentiated with drugs. DNA fragmentation was measured and small GTPase was detected by immunoblotting. Key findings: Alendronate and risedronate caused dose-dependent apoptosis of L6 myoblasts. Risedronate induced detachment of rho GTPase from the cell membrane, followed by activation of the caspase-8-related cascade. Risedronate-induced apoptosis was synergistically enhanced with atorvastatin and significantly reduced by addition of geranylgeraniol. By contrast, alendronate did not reduce membrane GTPases and the apoptosis was caspase independent. Conclusions: These results suggest that risedronate-induced apoptosis is related to geranylgeranyl pyrophosphate depletion followed by rho detachment, whereas alendronate affects are independent of rho. Our results suggest a risk of synergistic action between nitrogen-containing bisphosphonates and statins in the development of rhabdomyolysis when treating osteoporosis in women with hyperlipidaemia.

本文言語English
ページ(範囲)781-788
ページ数8
ジャーナルJournal of Pharmacy and Pharmacology
61
6
DOI
出版ステータスPublished - 2009 6月

ASJC Scopus subject areas

  • 薬理学
  • 薬科学

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