PINK1/Parkin-Mediated Mitophagy Regulation by Reactive Oxygen Species Alleviates Rocaglamide A-Induced Apoptosis in Pancreatic Cancer Cells

PINK1/Parkin-Mediated Mitophagy Regulation by Reactive Oxygen Species Alleviates Rocaglamide A-Induced Apoptosis in Pancreatic Cancer Cells
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活性氧物质介导的 PINK1/Parkin 介导的线粒体自噬调节可减轻 Rocaglamide A 诱导的胰腺癌细胞凋亡

DOI:
10.3389/fphar.2019.00968
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发表时间:
2019-09
影响因子:
5.6
通讯作者:
Qin Renyi
Qin Renyi
中科院分区:
医学2区
文献类型:
--
作者:
Zhao Chunle;He Ruizhi;Shen Ming;Zhu Feng;Wang Min;Liu Yuhui;Chen Hua;Li Xu;Qin Renyi

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胰腺癌(PC)是最致命的疾病之一,并且PC患者的有效治疗仍然是一个巨大的挑战。罗格列胺A(Rocaglamide A,Roc-A)是从植物米仔兰(Aglaia elliptifolia)中提取的生物活性分子,作为多种癌症治疗的治疗选择引起了相当大的关注。然而,Roc-A在PC中的作用和潜在机制仍然知之甚少。在这里,我们发现,Roc-A抑制生长,并通过诱导PC中的线粒体功能障碍刺激细胞凋亡。此外,Roc-A加速自噬体合成并触发涉及PTEN诱导的推定激酶1(PINK 1)/Parkin信号通路的线粒体自噬。我们还证明了自噬/线粒体自噬的抑制可以使PC细胞对Roc-A敏感。最后,Roc-A处理导致活性氧(ROS)的明显积累,用活性氧清除剂N-乙酰半胱氨酸预处理细胞可逆转Roc-A诱导的细胞凋亡和自噬/线粒体自噬。总之,我们的结果阐明了Roc-A的潜在作用机制。我们的研究结果表明,Roc-A作为一个潜在的治疗剂对PC,并建议自噬/线粒体自噬的联合抑制可能是一个有前途的治疗策略在PC。
Pancreatic cancer (PC) is one of the most lethal diseases, and effective treatment of PC patients remains an enormous challenge. Rocaglamide A (Roc-A), a bioactive molecule extracted from the plant Aglaia elliptifolia, has aroused considerable attention as a therapeutic choice for numerous cancer treatments. Nevertheless, the effects and underlying mechanism of Roc-A in PC are still poorly understood. Here, we found that Roc-A inhibited growth and stimulated apoptosis by induction of mitochondria dysfunction in PC. Moreover, Roc-A accelerated autophagosome synthesis and triggered mitophagy involving the PTEN-induced putative kinase 1 (PINK1)/Parkin signal pathway. We also demonstrated that inhibition of autophagy/mitophagy can sensitize PC cells to Roc-A. Finally, Roc-A treatment results in an obvious accumulation of reactive oxygen species (ROS), and pretreatment of cells with the reactive oxygen species scavenger N-acetylcysteine reversed the apoptosis and autophagy/mitophagy induced by Roc-A. Together, our results elucidate the potential mechanisms of action of Roc-A. Our findings indicate Roc-A as a potential therapeutic agent against PC and suggest that combination inhibition of autophagy/mitophagy may be a promising therapeutic strategy in PC.
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