例如:"lncRNA", "apoptosis", "WRKY"

E2F6-mediated lncRNA CASC2 down-regulation predicts poor prognosis and promotes progression in gastric carcinoma.

Life Sci.2019 Sep 01;232:116649. Epub 2019 Jul 10
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摘要


AIMS:To investigate the potential biological role of E2F6 and its underlying molecular mechanism in gastric carcinoma (GC) progression. MAIN METHODS:The expressions of cancer susceptibility candidate 2 (CASC2), E2F6 and matrix metalloprotein-2 (MMP-2) were measured by quantitative real-time polymerase chain reaction and western blotting. The inhibitory effect of E2F6 on CASC2 was evaluated using luciferase reporter assay. Cell growth was assessed by colony formation assay and cell counting kit-8. Cell invasion and apoptosis were measured by transwell assay and flow cytometry assay, respectively. In vivo tumorigenicity was assessed by tumor xenografts in nude mice. KEY FINDINGS:Our data revealed that CASC2 was downregulated while E2F6 was upregulated in GC tissues and cell lines. Remarkably, lower expression of CASC2 was associated with poor survival in GC patients. E2F6 inhibited the expression of CASC2. Subsequently, reliable data showed that downregulation of E2F6 suppressed the proliferation and invasion, and promoted the apoptosis of GC cells. Furthermore, downregulation of E2F6 decreased the expression of MMP-2 and increased the activity of caspase-3. However, these changes triggered by E2F6 knockdown could be reversed by inhibition of CASC2. Moreover, we also proved that downregulation of CASC2 reverses the effect of E2F6 knockdown on tumor growth in vivo. SIGNIFICANCE:Our data demonstrated that E2F6 could regulate the proliferation, invasion and apoptosis of GC cells via inhibiting the expression of CASC2, suggesting that E2F6/CASC2 axis is another regulator of GC progression.

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