例如:"lncRNA", "apoptosis", "WRKY"

TRIM13 inhibited cell proliferation and induced cell apoptosis by regulating NF-κB pathway in non-small-cell lung carcinoma cells.

Gene. 2019 Oct 05;715:144015. Epub 2019 Jul 26
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摘要


Tripartite Motif Containing 13 (TRIM13), a member of TRIM proteins, is deleted in multiple tumor types, especially in B-cell chronic lymphocytic leukemia and multiple myeloma. The present study explored the expression and potential role of TRIM13 in non-small-cell lung carcinoma (NSCLC). We found that TRIM13 mRNA and protein expression was reduced in NSCLC tissues and cell lines in comparison to paired non-cancerous tissues and a human normal bronchial epithelial cell line, respectively. Overexpression of TRIM13 in NCI-H1975 and SPC-A-1 cells hampered cell proliferation. Additionally, TRIM13 overexpression increased the levels of cleaved caspase-3. TRIM13-induced NSCLC cell apoptosis was attenuated by a caspase-3 inhibitor Ac-DEVD-CHO, suggesting that TRIM13 induced cell apoptosis partially through a caspase-3-dependent pathway. Moreover, it has been reported that TRIM13 can regulate nuclear factor kappaB (NF-κB) activity. Our data showed that TRIM13 overexpression inactivated NF-κB as indicated by the increased cytosolic NF-κB and decreased nuclear NF-κB. Exposure to an NF-κB inhibitor PDTC significantly blocked the impact of TRIM13 knockdown on cell proliferation and apoptosis, indicating the functions of TRIM13 in NSCLC cells were mediated by the NF-κB pathway. Finally, we demonstrated that TRIM13 overexpression suppressed tumor growth and induced cell apoptosis in vivo by using a xenograft mouse model. Collectively, our results indicate that TRIM13 behaves as a tumor suppressor in NSCLC through regulating NF-κB pathway. Our findings may offer a promising therapeutic target for NSCLC.

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