RIG‐I promotes IFN/JAK2 expression and the endoplasmic reticulum stress response to inhibit chemoradiation resistance in nasopharyngeal carcinoma. (28th August 2019)

• Record Type: Journal Article
• Authors: Jing, Di; Zhou, Weibing; Shen, Lin; Zhang, Qian; Xie, Wang‐Ti; Shen, Erdong; Li, Zhi; Shen, Liang‐Fang; Sun, Lun‐Quan
• Is Part Of: Cancer medicine. Volume 8:Number 14(2019:Oct.)
• Page Start: 6344
• Page End: 6357
• Publication Date: 2019-08-28
• Subjects: apoptosis -- endoplasmic reticulum stress -- IFN/JAK2 -- radiotherapy and chemotherapy resistance -- RIG‐I; 616.994005
• DOI: 10.1002/cam4.2501
• Languages: English
• ISSNs: 2045-7634

Abstract

Abstract: RIG‐I is associated with the occurrence and development of many tumors. However, the role of RIG‐I in radiotherapy and chemotherapy in NPC has not been reported to date. In our study, RIG‐I expression was significantly reduced in chemoradiotherapy‐resistant NPC tissues and cells compared with that in therapy‐sensitive tissues and cells. RIG‐I expression increased in nonresistant NPC cells, including CNE1 and CNE2, in a dose‐dependent manner with increasing chemotherapy drug concentration or radiotherapy dose. RIG‐I overexpression promoted radiotherapy and chemotherapy sensitivity in NPC cells, leading to cellular apoptosis and increased expression of the proapoptotic factors BAX and caspase‐3. Similarly, RIG‐I knockdown in NPC cells promoted chemoradiotherapy resistance and reduced apoptosis. Analysis of microarray data indicated that the expression of IFN/JAK2 and endoplasmic reticulum (ER) stress response markers, such as JAK2, STAT1, IRF9, IFNB1, IRF3, p‐IRF3, XBP1, ATF6, IFIT2, and ISG15, was inhibited in chemoradiotherapy‐resistant cells compared with that in sensitive cells. Conversely, activation of IFN/JAK2 and ER stress response pathways in NPC cells reduced paclitaxel resistance and increased apoptosis. RIG‐I promotes IFN/JAK2 and ER stress response‐mediated apoptosis to inhibit chemoradiation resistance in nasopharyngeal carcinoma. Abstract : RIG‐I expression was significantly reduced in chemoradiotherapy‐resistant NPC tissues and cells compared with that in therapy‐sensitive tissues and cells. RIG‐I overexpression promoted radiotherapy and chemotherapy sensitivity in NPC cells, leading to cellular apoptosis and increased expression of the proapoptotic factors BAX and caspase‐3. RIG‐I promotes IFN/JAK2 and ER stress response‐mediated apoptosis to inhibit chemoradiation resistance in nasopharyngeal carcinoma.