American Association for Cancer Research
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Figure S6 from Nkx2.8 Inhibits Epithelial–Mesenchymal Transition in Bladder Urothelial Carcinoma via Transcriptional Repression of Twist1

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posted on 2023-03-31, 00:04 authored by Chunping Yu, Zhuowei Liu, Qiuhong Chen, Yonghong Li, Lijuan Jiang, Zhiling Zhang, Fangjian Zhou

Typical pictures of orthotopic xenograft bladder cancer model with 5637/Nkx2.8 RNAi and 5637/Nkx2.8 RNAi/Twist1 RNAi cells


National Natural Science Foundation of China

Natural Science Foundation of Guangdong Province



Epithelial-to-mesenchymal transition (EMT) promotes metastasis, which is the main cause of bladder urothelial carcinoma–related death. Loss of the candidate tumor-suppressor gene Nkx2.8 has been associated with urothelial carcinoma lymph node metastasis. Here, we show that enforced expression of Nkx2.8 is sufficient to inhibit EMT, reduce motility, and blunt invasiveness of urothelial carcinoma cells. Mechanistic investigations showed that Nkx2.8 negatively regulated expression of the EMT inducer Twist1 in urothelial carcinoma cells, at both the level of mRNA and protein accumulation. Nkx2.8 bound directly to the promoter region of this gene and transcriptionally repressed its expression. Twist1 upregulation reversed EMT inhibition by Nkx2.8, restoring the invasive phenotype of urothelial carcinoma cells. In clinical urothelial carcinoma specimens, expression of Nkx2.8 inversely correlated with Twist1 expression, and urothelial carcinoma patients with Nkx2.8 positivity and low Twist1 expression displayed the best prognosis. Our findings highlight the Nkx2.8–Twist1 axis as candidate target for therapeutic intervention in advanced urothelial carcinoma.Significance: These findings highlight a novel EMT signaling axis as a candidate target for therapeutic intervention in advanced urothelial carcinomas. Cancer Res; 78(5); 1241–52. ©2018 AACR.