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Deoxynivalenol-Induced Cytotoxicity and Apoptosis in IPEC-J2 Cells Through the Activation of Autophagy by Inhibiting PI3K-AKT-mTOR Signaling Pathway
ACS Omega ( IF 3.7 ) Pub Date : 2019-10-24 , DOI: 10.1021/acsomega.9b03208
Xiaolian Gu 1 , Wenyan Guo 1 , Yujie Zhao 1 , Gang Liu 1, 2 , Jine Wu 1, 2 , Chao Chang 1, 2
Affiliation  

With the purpose to explore the relationship between deoxynivalenol (DON)-induced apoptosis and autophagy and provide mechanistic explanations for the toxic effects of DON on IPEC-J2 cells, we determined the cell viability, cell morphology, apoptosis, and autophagy by using autophagy inhibitor 3-methyladenine (3-MA), PI3K pathway inhibitor LY294002, and activator 740Y-P. It turned out that 3-MA was able to attenuate the reduction of cell viability induced by DON. Moreover, 3-MA was capable of upregulating the expression of DON-induced autophagic protein p62 and downregulating the expressions of DON-induced autophagic protein LC3-II and apoptotic protein Bax, suggesting that autophagy is a driving mechanism for this apoptotic induction. The results of Annexin V-FITC/PI double staining indicated that DON could induce apoptosis by inhibiting the PI3K-AKT-mTOR signaling pathway. Subsequently, it was further confirmed by Western blot analysis that DON significantly decreased expressions of P-AKT/AKT, p-mTOR/mTOR, and autophagic protein p62, and increased expression of autophagy-related protein LC3-II, suggesting that DON triggered autophagy by inhibiting the PI3K-AKT-mTOR signaling pathway. To conclude, these data reveal that DON may induce cytotoxicity and apoptosis through the activation of autophagy by suppressing the PI3K-AKT-mTOR signaling pathway. This study provides new insights into the mechanisms by which DON incurs cytotoxic effects.

中文翻译:

通过抑制PI3K-AKT-mTOR信号通路的自噬激活脱氧雪腐酚诱导的IPEC-J2细胞的细胞毒性和凋亡。

为了探讨脱氧雪腐酚(DON)诱导的凋亡与自噬之间的关系,并为DON对IPEC-J2细胞的毒性作用提供机理解释,我们使用自噬抑制剂确定了细胞活力,细胞形态,凋亡和自噬3-甲基腺嘌呤(3-MA),PI3K途径抑制剂LY294002和活化剂740Y-P。结果表明3-MA能够减轻由DON诱导的细胞活力的降低。此外,3-MA能够上调DON诱导的自噬蛋白p62的表达,并下调DON诱导的自噬蛋白LC3-II和凋亡蛋白Bax的表达,表明自噬是这种凋亡诱导的驱动机制。Annexin V-FITC / PI双重染色的结果表明,DON可以通过抑制PI3K-AKT-mTOR信号通路来诱导细胞凋亡。随后,通过蛋白质印迹分析进一步证实,DON显着降低了P-AKT / AKT,p-mTOR / mTOR和自噬蛋白p62的表达,并增加了自噬相关蛋白LC3-II的表达,表明DON触发了自噬通过抑制PI3K-AKT-mTOR信号通路。总而言之,这些数据揭示了DON可以通过抑制PI3K-AKT-mTOR信号通路,通过自噬的激活来诱导细胞毒性和凋亡。这项研究为DON引起细胞毒性作用的机制提供了新的见解。Western印迹分析进一步证实,DON显着降低了P-AKT / AKT,p-mTOR / mTOR和自噬蛋白p62的表达,并增加了自噬相关蛋白LC3-II的表达,表明DON通过抑制抑制蛋白来引发自噬。 PI3K-AKT-mTOR信号通路。总而言之,这些数据揭示了DON可以通过抑制PI3K-AKT-mTOR信号通路,通过自噬的激活来诱导细胞毒性和凋亡。这项研究为DON引起细胞毒性作用的机制提供了新的见解。Western印迹分析进一步证实,DON显着降低了P-AKT / AKT,p-mTOR / mTOR和自噬蛋白p62的表达,并增加了自噬相关蛋白LC3-II的表达,表明DON通过抑制抑制蛋白来引发自噬。 PI3K-AKT-mTOR信号通路。总而言之,这些数据揭示了DON可以通过抑制PI3K-AKT-mTOR信号通路,通过自噬的激活来诱导细胞毒性和凋亡。这项研究为DON引起细胞毒性作用的机制提供了新的见解。这些数据表明,DON可以通过抑制PI3K-AKT-mTOR信号转导途径,通过自噬的激活来诱导细胞毒性和凋亡。这项研究为DON引起细胞毒性作用的机制提供了新的见解。这些数据表明,DON可以通过抑制PI3K-AKT-mTOR信号转导途径,通过自噬的激活来诱导细胞毒性和凋亡。这项研究为DON引起细胞毒性作用的机制提供了新的见解。
更新日期:2019-11-05
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