上睑下垂
癌症研究
胰腺癌
癌症
生物
肺癌
癌细胞
程序性细胞死亡
医学
免疫学
细胞凋亡
肿瘤科
遗传学
生物化学
作者
Lili Su,Yitian Chen,Cheng Huang,Sangqing Wu,Xiaojuan Wang,Xu Zhao,Qiuping Xu,Ruipu Sun,Xiangbin Kong,Xue Jiang,Xiaoyi Qiu,Xiaoming Huang,Minghui Wang,Ping-Pui Wong
出处
期刊:Science Translational Medicine
[American Association for the Advancement of Science (AAAS)]
日期:2023-01-11
卷期号:15 (678)
被引量:24
标识
DOI:10.1126/scitranslmed.abl7895
摘要
Pancreatic and lung cancers frequently develop resistance to chemotherapy-induced cell apoptosis during the treatment, indicating that targeting nonapoptotic-related pathways, such as pyroptosis, can be an alternative cancer treatment strategy. Pyroptosis is a gasdermin-driven lytic programmed cell death triggered by inflammatory caspases when initiated by canonical or noncanonical pathways that has been recently seen as a potential therapeutic target in cancer treatment. However, overcoming chemoresistance in cancers by modulating pyroptosis has not been explored. Here, we demonstrate that β5-integrin represses chemotherapy-induced canonical pyroptosis to confer cancer chemoresistance through ASAH2-driven sphingolipid metabolic reprogramming. Clinically, high β5-integrin expression associates with poor patient prognosis and chemotherapeutic responses in cancers. In addition, chemoresistant cells in vitro fail to undergo chemotherapy-induced pyroptosis, which is controlled by β5-integrin. Mechanistically, proteomic and lipidomic analyses indicate that β5-integrin up-regulates sphingolipid metabolic enzyme ceramidase (ASAH2) expression through Src-signal transducer and activator of transcription 3 (STAT3) signaling, which then reduces the metabolite ceramide concentration and subsequent ROS production to prohibit chemotherapy-induced canonical pyroptosis. Using cancer cell lines, patient-derived tumor organoids, and orthotopic lung and pancreatic animal models, we show that administration of a Src or ceramidase inhibitor rescues the response of chemoresistant pancreatic and lung cancer cells to chemotherapy by reactivating pyroptosis in vitro and in vivo. Overall, our results suggest that pyroptosis-based therapy is a means to improve cancer treatment and warrants further investigation.
科研通智能强力驱动
Strongly Powered by AbleSci AI