STK33 promotes the growth and progression of human pancreatic neuroendocrine tumour via activation of the PI3K/AKT/mTOR pathway

Background: Serine/threonine kinase 33 (STK33) has been reported to play an important role in cancer cell proliferation. We investigated the role of STK33 in pancreatic neuroendocrine tumour (PNET) and the underlying mechanisms. Methods: PNET specimens and adjacent non-tumorous pancreatic tissues from 84 patients who underwent curative surgery for PNET were stained by immunochemistry for STK33. The relationships among STK33 expression, clinicopathological parameters and clinical prognosis were statistically analysed. MTT, scratching, transwell and apoptosis assays were employed to detect the effects of STK33 knockdown (siSTK33) or STK33 overexpression (pSTK33) on major oncogenic properties of cells of two PNET cell lines (BON and QGP-1), and real-time PCR and western blot were used to examine the expression of relevant genes. Results: Relative to its expression in normal pancreatic tissue, STK33 was over-expressed in PNET specimens. Furthermore, STK33 expression was significantly associated with WHO classification (P
Source: Neuroendocrinology - Category: Endocrinology Source Type: research