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论文类型：期刊论文

发表时间：2016-11-01

发表刊物：INTERNATIONAL IMMUNOPHARMACOLOGY

收录刊物：SCIE、PubMed、Scopus

卷号：40

页面范围：400-409

ISSN号：1567-5769

关键字：SZC015; Apoptosis; Autophagy; Akt/NF-kappa B signaling; Lung cancer cells

摘要：Oleanolic acid (OA) and its several derivatives possess various pharmacological activities, such as antitumor and anti-inflammation. In present study, anticancer effect of SZC015, an OA derivative, and its underlying mechanisms were investigated. We demonstrated that cell viability was significantly decreased in SZC015-treated lung cancer cells, but has less cytotoxicity in human bronchial epithelial cell line. Further investigation verified that apoptosis and autophagy induction and G(0)/G(1) phase arrest were observed in SZC015-treated H322 cells. Mechanically, the level of Akt p-Akt, p-I kappa B alpha, and total p65, the p-p65 in the cytoplasm and nucleus were suppressed by SZC015 in H322 cells, respectively. Inhibition of p65 nuclear translocation was also confirmed by immunofluorescence staining. In addition, co-treatment with chloroquine, an autophagy inhibitor, significantly inhibited SZC015-induced autophagy and enhanced SZC015-induced apoptotic cell death. Intracellular ROS was increased in a concentration-dependent manner, which could be prevented by N-Acetyl L-Cysteine, an ROS scavenger. Moreover, the level of Akt and procaspase-3 were increased, while the ratio of LC3 II/I was decreased. Taken together, our study demonstrates that the inhibitory effect of SZC015 against H322 cells is mediated by excessive ROS generation that could suppress Akt/NF-kappa B signaling pathway, which thereby leads to apoptotic and autophagic cell death. (C) 2016 Published by Elsevier B.V.