| Literature DB >> 25269472 |
Meihui Xia1, Huimei Yu2, Shuang Gu3, Ye Xu4, Jing Su2, Hongyan Li2, Jinsong Kang2, Manhua Cui1.
Abstract
The mechanisms underlying cisplatin resistance in tumors are not fully understood. Previous studies have reported that cellular resistance to oxidative stress is accompanied by resistance to cisplatin. However, the relationship between the resistance to oxidative stress and cisplatin drug resistance in human ovarian cancer cells (HOCCs) is not clear. Here, we reveal a critical role for the multifunctional protein p62/SQSTM1 in cisplatin resistance in human ovarian cancer cells (HOCCs). p62/SQSTM1 (sequestosome 1) plays important roles in cell differentiation, proliferation and as an antiapoptotic molecule. We found that cisplatin-resistant SKOV3/DDP cells express much higher levels of p62 than do cisplatin-sensitive SKOV3 cells. The protein p62 can activate the Keap1-Nrf2-ARE signaling pathway and induce the expression of antioxidant genes in SKOV3/DDP cells. Knockdown of p62 resensitizes SKOV3/DDP cells to cisplatin. Collectively, our data indicate that cisplatin resistance in HOCCs is partially attributable to their high expression of p62, which plays an important role in preventing ROS stress-induced apoptosis by regulating the Keap1-Nrf2-ARE signaling pathway.Entities:
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Year: 2014 PMID： 25269472 DOI： 10.3892/ijo.2014.2669
Source DB: PubMed Journal: Int J Oncol ISSN： 1019-6439 Impact factor: 5.650