Chaperonin-containing TCP-1 promotes cancer chemoresistance and metastasis through the AKT-GSK3β-β-catenin and xiap-survivin pathways

Yun Xun Chang, Yuan Feng Lin, Chi Long Chen, Ming Shyan Huang, Michael Hsiao, Po Huang Liang

研究成果: 雜誌貢獻文章同行評審

13 引文 斯高帕斯(Scopus)

摘要

Chaperonin-containing TCP-1 (CCT) is a chaperonin composed of eight subunits that participates in intracellular protein folding. Here, we showed that increased levels of subunits of CCT, particularly CCT-β, were significantly correlated with lower survival rates for cancer patients. Endogenously high expression of CCT-β was found in cancer cell lines, such as the triple-negative breast cancer cell line MDA-MB-231 and the highly metastatic non-small-cell lung cancer cell line CL1-5. Knocking down CCT-β in these cancer cells led to decreased levels of anti-apoptotic proteins, such as XIAP, as well as inhibited phosphorylation of Ser473-AKT and GSK3, resulting in decrease of the nucleus-entering form of β-catenin; these changes reduced the chemoresistance and migration/invasion of the cells. Conversely, overexpression of CCT-β recovered the chemoresistance and cell migration/invasion by promoting the AKT-GSK3β-β-catenin and XIAP-Survivin pathways. Coimmunoprecipitation data revealed that the CCT complex might directly bind and stabilize XIAP and β-catenin. This study not only elucidates the roles of CCT in chemoresistance and metastasis, which are two major obstacles for current cancer therapy, but also provides a possible therapeutic strategy against cancers with overexpressed CCT-β.
原文英語
文章編號3865
頁(從 - 到)1-25
頁數25
期刊Cancers
12
發行號12
DOIs
出版狀態已發佈 - 12月 2020

ASJC Scopus subject areas

  • 腫瘤科
  • 癌症研究

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