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

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)781-788
Number of pages8
JournalJournal of Pharmacy and Pharmacology
Volume61
Issue number6
DOIs
Publication statusPublished - 2009 Jan 1

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Skeletal Myoblasts
Hydroxymethylglutaryl-CoA Reductase Inhibitors
Rhabdomyolysis
Diphosphonates
Alendronate
Nitrogen
Apoptosis
Myoblasts
Osteoporosis
Mevalonic Acid
rho GTP-Binding Proteins
Monomeric GTP-Binding Proteins
Caspase 8
GTP Phosphohydrolases
DNA Fragmentation
Caspases
Hyperlipidemias
Immunoblotting
Oxidoreductases
Cell Membrane

Keywords

  • Apoptosis
  • N-containing bisphosphonates
  • Protein prenylation
  • Statins

ASJC Scopus subject areas

  • Pharmacology
  • Pharmaceutical Science

Cite this

Synergistic action of statins and nitrogen-containing bisphosphonates in the development of rhabdomyolysis in L6 rat skeletal myoblasts. / Matzno, Sumio; Nishiguchi, Tomoko; Akiyoshi, Takeshi; Anami, Setsuko; Nakabayashi, Toshikatsu; Matsuyama, Kenji.

In: Journal of Pharmacy and Pharmacology, Vol. 61, No. 6, 01.01.2009, p. 781-788.

Research output: Contribution to journalArticle

Matzno, Sumio ; Nishiguchi, Tomoko ; Akiyoshi, Takeshi ; Anami, Setsuko ; Nakabayashi, Toshikatsu ; Matsuyama, Kenji. / Synergistic action of statins and nitrogen-containing bisphosphonates in the development of rhabdomyolysis in L6 rat skeletal myoblasts. In: Journal of Pharmacy and Pharmacology. 2009 ; Vol. 61, No. 6. pp. 781-788.
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