Abstract
MYO10 is an actin-based motor protein and correlates with cancer metastasis. However, the regulation of MYO10 by tumor microenvironment is unknown. In the current study, we found that the expression of protease activated receptor 2 (PAR2) was highly correlated with that of MYO10 in colorectal carcinoma (CRC) specimens. Both MYO10 and PAR2 were up-regulated in lymph node metastasis group compared with non-metastasis group. Activation of PAR2 significantly induced cell migration through the up-regulation of MYO10, which was mediated by repression of miR-204 in multiple cell lines. Interestingly, it was observed that tryptase was highly expressed in adjacent tissue around primary tumor of CRC. Furthermore, tryptase stimulated cell migration and up-regulated MYO10 expression through a PAR2-dependent manner. Taken together, our findings showed that PAR2 enhanced the expression of MYO10 through the repression of miR-204. PAR2 mediated tryptase-induced cell migration and might contribute to the invasion of cancer cells at the edge of tumor.