Inhibition of the EGFR/STAT3/CEBPD Axis reverses cisplatin cross-resistance with paclitaxel in the urothelial carcinoma of the urinary bladder

Wei Jan Wang, Chien Feng Li, Yu Yi Chu, Yu Hui Wang, Tzyh Chyuan Hour, Chia Jui Yen, Wen Chang Chang, Ju Ming Wang

研究成果: 雜誌貢獻文章

14 引文 斯高帕斯(Scopus)

摘要

Purpose: Cisplatin (CDDP) is frequently used in combination chemotherapy with paclitaxel for treating urothelial carcinoma of the urinary bladder (UCUB). CDDP cross-resistance has been suggested to develop with paclitaxel, thus hindering successful UCUB treatment. Therefore, elucidating the mechanisms underlying CDDP-induced anticancer drug resistance is imperative and may provide an insight in developing novel therapeutic strategy. Experimental Design: Loss-of-function assays were performed to elucidate the role of the EGFR and STAT3 in CDDP-induced CCAAT/enhancer-binding protein delta (CEBPD) expression in UCUB cells. Reporter and in vivo DNA-binding assays were employed to determine whether CEBPD directly regulates ATP binding cassette subfamily B member 1 (ABCB1) and ATP binding cassette subfamily C member 2 (ABCC2) activation. Finally, a xenograft animal assay was used to examine the abilities of gefitinib and S3I-201 (a STAT3 inhibitor) to reverse CDDP and paclitaxel sensitivity. Results: CEBPD expression was maintained in postoperative chemotherapy patients, and this expression was induced by CDDP even in CDDP-resistant UCUB cells. Upon CDDP treatment, CEBPD activated ABCB1 and ABCC2. Furthermore, the EGFR/STAT3 pathway contributed to CDDP-induced CEBPD expression in UCUB cells. Gefitinib and S3I-201 treatment significantly reduced the expression of CEBPD and enhanced the sensitivity of CDDP-resistant UCUB cells to CDDP and paclitaxel. Conclusions: Our results revealed the risk of CEBPD activation in CDDP-resistant UCUB cells and suggested a therapeutic strategy for patients with UCUB or UCUB resisted to CDDP and paclitaxel by combination with either gefitinib or S3I-201.

原文英語
頁(從 - 到)503-513
頁數11
期刊Clinical Cancer Research
23
發行號2
DOIs
出版狀態已發佈 - 一月 15 2017

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

指紋 深入研究「Inhibition of the EGFR/STAT3/CEBPD Axis reverses cisplatin cross-resistance with paclitaxel in the urothelial carcinoma of the urinary bladder」主題。共同形成了獨特的指紋。

  • 引用此