Overexpression of CSN6 promotes the epithelial-mesenchymal transition and predicts poor prognosis in hepatocellular carcinoma - 20/06/20
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Highlights |
• | Upregulation of CSN6 expression was significantly associated with the progression and poor survival in HCC patients. |
• | CSN6 promotes proliferation, invasion and migration of HCC cells. |
• | CSN6 led to the metastasis and EMT activation through MEK/ERK pathway. |
Summary |
Background and aim |
CSN6, as a critical subunit of the constitutive photomorphogenesis 9 (COP9) signalosome (CSN), has been previously reported to be increased in various cancers; however, its effect in hepatocellular carcinoma (HCC) remains unknown, which is the aim of present study, in terms of its explore the expression and role of CSN6 in HCC.
Methods |
QRT-PCR, Western blot and immunohistochemistry (IHC) were used to examine the expression of CSN6. Kaplan-Meier survival analysis and univariate and multivariate Cox analyses were used to investigate the clinical and prognostic significance of CSN6 expression in HCC patients. Furthermore, the biological function of CSN6 on HCC cell proliferation and migration was investigated through CCK-8, transwell migration and invasion assays. Besides, the associations between CSN6 and epithelial-mesenchymal transition (EMT) were determined.
Results |
CSN6 was increased in HCC tissues, and its overexpression was found to be associated with a poor prognoses for HCC patients. Overexpression of CSN6 promoted processes of HCC cell proliferation, migration, and invasion, while these processes were inhibited when CSN6 was silenced. Additionally, CSN6 was found to promote EMT by inhibiting E-cadherin, which were significantly mitigated via upregulation of Snail as a result of MEK/ERK pathway activation.
Conclusions |
CSN6 up-regulation may play a contributory role in HCC metastasis and poor prognosis via activation of EMT, and may serve as an independent predictor for HCC prognosis.
El texto completo de este artículo está disponible en PDF.Keywords : CSN6, Hepatocellular carcinoma, Prognosis, Epithelial-mesenchymal transition
Esquema
Vol 44 - N° 3
P. 340-348 - juin 2020 Regresar al número
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