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Abstract
Transmembrane protease serine 4 (TMPRSS4), a type-II transmembrane serine protease, is involved in the development and progression of wide range of tumors. However, the biological role of TMPRSS4 in prostate cancer remains obscure. Here, we investigated the effect of TMPRSS4 on proliferation and migration in prostate cancer and potential mechanisms. Our findings demonstrated over-expression of TMPRSS4 promoted the PC3 prostate cancer cells migration, which could be reversed by TMPRSS4 silencing. TMPRSS4 induced TWIST1 expression and followed progression of EMT along with upregulation of N-cadherin and downregulation of E-cadherin via STAT3 phosphorylation. Silencing TWIST1 significantly attenuated TMPRSS4-induced PC3 migration. Moreover, knockdown of STAT3 effectively attenuated TMPRSS4-induced TWIST1 expression and TWIST1 promoter activity. Taken together, we demonstrated a mechanistic cascade of TMPRSS4 up-regulating STAT3 activation and subsequent TWIST1 expression, leading to prostate cancer migration.
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