A ZEB1-miR-375-YAP1 pathway regulates epithelial plasticity in prostate cancer
2017
MicroRNA-375 (
miR-375) is frequently elevated in prostate tumors and cell-free fractions of patient blood, but its role in genesis and progression of prostate cancer is poorly understood. In this study, we demonstrated that
miR-375 is inversely correlated with
epithelial–mesenchymal transitionsignatures (EMT) in clinical samples and can drive
mesenchymal–epithelial transition(MET) in model systems. Indeed,
miR-375 potently inhibited invasion and migration of multiple prostate cancer lines. The transcription factor
YAP1was found to be a direct target of
miR-375 in prostate cancer. Knockdown of
YAP1
phenocopied
miR-375 overexpression, and overexpression of
YAP1rescued anti-invasive effects mediated by
miR-375. Furthermore, transcription of the
miR-375 gene was shown to be directly repressed by the EMT transcription factor, ZEB1. Analysis of multiple patient cohorts provided evidence for this ZEB1-
miR-375-
YAP1
regulatory circuitin clinical samples. Despite its anti-invasive and anti-EMT capacities, plasma
miR-375 was found to be correlated with
circulating tumor cellsin men with metastatic disease. Collectively, this study provides new insight into the function of
miR-375 in prostate cancer, and more broadly identifies a novel pathway controlling epithelial plasticity and tumor cell invasion in this disease.
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