Abstract
Protein tyrosine phosphatases (PTPs) are involved in malignant transformation and metastasis. According to one of our previous studies, Slingshot homolog 1 (SSH1), a member of PTPs, is significantly associated with the survival of intrahepatic cholangiocarcinoma (iCCA) patients. However, the underlying mechanisms of SSH1 in iCCA remain largely elusive. Here, the expression and clinical significance of SSH1 were assessed using the iCCA patient samples. The results showed that SSH1 was dramatically up-regulated in iCCA tissues and elevated SSH1 expression was associated with worse overall survival of iCCA patients. Overexpression of SSH1 accelerated the proliferation, migration, and invasion of iCCA cells, and also inhibited cell apoptosis. Furthermore, the downstream signaling pathway of SSH1 in iCCA was explored and it was revealed that the increased expression of SSH1 could activate the p38 mitogen-activated protein kinase (MAPK) pathway and enhance the expression of C-X-C motif chemokine ligand 8 (CXCL8). Notably, the high correlation of SSH1 with CXCL8 jointly indicated the poor prognosis in iCCA patients. Thus, our study suggests SSH1 as a potentially promising target for iCCA, which promoted iCCA progression through a potential p38 MAPK-CXCL8 axis.
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