Menadione-induced cytotoxicity to rat osteoblasts

J. S. Sun, Y. H. Tsuang, W. C. Huang, L. T. Chen, Y. S. Hang, F. J. Lu

研究成果: 雜誌貢獻文章同行評審

18 引文 斯高帕斯(Scopus)


Oxygen-derived free radical injury has been associated with several cytopathic conditions. Oxygen radicals produced by chondrocytes is an important mechanism by which chondrocytes induce matrix degradation. In the present study, we extend these observations by studying oxidative processes against osteoblasts. Osteoblasts were mixed in in vitro culture with 200 μM menadione. The cytotoxic effect of menadione-induced oxidative stress was monitored by lucigenin- or luminol-amplified chemiluminescence,tetrazolium assay and immunocytochemical study. Results showed that adding menadione induces an oxidative stress on osteoblasts, via superoxide and hydrogen peroxide production, that can be eradicated by superoxide dismutase (SOD) and catalase in a dose-dependent manner. Catalase and the appropriate concentration of dimethyl sulfoxide have a protective effect on cytotoxicity induced by menadione, whereas SOD does not. Menadione-treated osteoblasts have a strong affinity for annexin V, and the nuclei are strongly stained by TUNEL (TdT-mediated dUTP nick-end labelling). The results suggest that menadione-triggered production of reactive oxygen species leads to apoptosis of osteoblasts.

頁(從 - 到)967-976
期刊Cellular and Molecular Life Sciences
出版狀態已發佈 - 1997

ASJC Scopus subject areas

  • 分子醫學
  • 分子生物學
  • 藥理
  • 細胞與分子神經科學
  • 細胞生物學


深入研究「Menadione-induced cytotoxicity to rat osteoblasts」主題。共同形成了獨特的指紋。