Nkx2.8 promotes chemosensitivity in bladder urothelial carcinoma via transcriptional repression of MDR1.

Zhaohui Zhou, Longbin Xiong, Zeshen Wu, Lijuan Jiang, Yonghong Li, Zhiyong Li, Yulu Peng, Kang Ning, Xiangpeng Zou, Zefu Liu, Jun Wang, Zhen Li, Fangjian Zhou, Zhuowei Liu, Zhiling Zhang, Chunping Yu

Cell death & disease 2022 May 24

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Multidrug resistance gene 1 (MDR1), a key factor contributing to drug insensitivity, has been associated with treatment failure and poor prognoses in various cancers, including bladder urothelial carcinoma (UC). Here we show that positive Nkx2.8 expression was associated with better prognosis of UC patients received chemotherapy. Patients with positive Nkx2.8 expression had promising prognosis from adjuvant chemotherapy. Enforced expression of Nkx2.8 promotes drug sensitivity of UC cells. Mechanistic investigations showed that Nkx2.8 negatively regulated expression of MDR1 by binds directly to the MDR1 promoter and transcriptionally represses MDR1 expression. P-gp inhibitor reversed chemosensitivity inhibition by Nkx2.8 scilencing. In clinical UC specimens, expression of Nkx2.8 inversely correlated with P-gp expression, and UC patients with Nkx2.8 positivity and low P-gp expression displayed the best prognosis. Our findings uncovered a new mechanism of chemosensitivity in UC cells and proposing Nkx2.8-MDR1 axis as a novel candidate target for therapeutic intervention of UC. © 2022. The Author(s).

Citation

Zhaohui Zhou, Longbin Xiong, Zeshen Wu, Lijuan Jiang, Yonghong Li, Zhiyong Li, Yulu Peng, Kang Ning, Xiangpeng Zou, Zefu Liu, Jun Wang, Zhen Li, Fangjian Zhou, Zhuowei Liu, Zhiling Zhang, Chunping Yu. Nkx2.8 promotes chemosensitivity in bladder urothelial carcinoma via transcriptional repression of MDR1. Cell death & disease. 2022 May 24;13(5):492