Augmentation of Oridonin-Induced Apoptosis Observed With Reduced Autophagy

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概要

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• Our previous studies showed that oridonin could induce apoptosis in HeLa cells; and in this study, we further investigated autophagy induced by oridonin in HeLa cells and the relationship between apoptosis and autophagy. HeLa cells were exposed with oridonin after 3-methyladenine (3-MA) pre-culture, and we evaluated the growth inhibitory ratio, morphologic changes, DNA fragmentation, proteins expression as well as autophagic and apoptotic levels. Oridonin inhibited the proliferation of HeLa cells in vitro and induced autophagy. Oligonucleosomal fragementation of DNA as well as increased activities of Bax proteins were induced by oridonin, but the expression of p-Bcl-2 protein was reduced. In the condition of oridonin-treatment, when the inhibitor of phosphoinositide 3-kinase (PI3K), wortmannin, was applied, the autophagic level was significantly decreased, while the apoptotic level was increased, indicating that PI3K is a key regulator of both autophagy and apoptosis. Akt, down-stream factor of PI3K, was activated in autophagic process but suppressed in apoptosis in this study. In addition, when autophagy was blocked by 3-MA, the expression of SIRT-1 was decreased, indicating SIRT-1 contributed to autophagy. Taken together, oridonin simultaneously induced HeLa cell both apoptosis and autophagy in HeLa cells, and inhibition of autophagy contributes to upregulation of apoptosis.

• 社団法人 日本薬理学会の論文
• 2006-07-20

著者

• Tashiro Shin-ichi

  Dep. Of Clinical And Biomedical Sciences Showa Pharmaceutical Univ. Jpn

• TASHIRO Shin-ichi

  Department of Clinical and Biomedical Sciences, Showa Pharmaceutical University

• ONODERA Satoshi

  Department of Clinical and Biomedical Sciences, Showa Pharmaceutical University

• IKEJIMA Takashi

  China-Japan Research Institute of Medical and Pharmaceutical Sciences, Shenyang Pharmaceutical Unive

• Onodera S

  Dep. Of Clinical And Biomedical Sciences Showa Pharmaceutical Univ. Jpn

• Onodera Satoshi

  昭和薬科大学 病態科

• Ikejima Takashi

  China-japan Res. Inst. Of Medical And Pharmaceutical Sciences Shenyang Pharmaceutical Univ. Chn

• CUI Qiao

  China-Japan Research Institute of Medical Pharmaceutical Sciences, Shenyang Pharmaceutical Universit

• Tashiro Shin-ichi

  Department Of Clinical And Biomedical Sciences Showa Pharmaceutical University

• Onodera Satoshi

  Department Of Cinical And Biomedical Sciences Showa Pharmaceutical University

• Tashiro Shin-ichi

  Department Of Cinical And Biomedical Sciences Showa Pharmaceutical University

• Cui Qiao

  China-japan Institute Of Medical And Pharmaceutical Sciences Shenyang Pharmaceutical University

• Tashiro S

  Department Of Clinical And Biomedical Sciences Showa Pharmaceutical University

• Onodera S

  Department Of Clinical And Biomedical Sciences Showa Pharmaceutical University

• Ikejima Takashi

  China–Japan Research Institute of Medical and Pharmaceutical Sciences, Shenyang Pharmaceutical University

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