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  • Title: lncRNA CERS6-AS1 as ceRNA promote cell proliferation of breast cancer by sponging miR-125a-5p to upregulate BAP1 expression.
    Author: Yan L, Li K, Feng Z, Zhang Y, Han R, Ma J, Zhang J, Wu X, Liu H, Jiang Y, Zhang Y, Zhu Y.
    Journal: Mol Carcinog; 2020 Oct; 59(10):1199-1208. PubMed ID: 32808708.
    Abstract:
    Long noncoding RNAs (lncRNAs) can act as oncogene and tumor suppressor genes in many types of cancers including breast cancer (BC). Our previous study has indicated microRNA (miR)-125a-5p was downregulated and function as a tumor suppressor in BC. However, its upstream regulation mechanism is still unclear. In this study, we used bioinformatics algorithms, RNA pulldown assay, and dual-luciferase reports assay to predict and confirm lncRNA CERS6-AS1 interacted with miR-125a-5p. Then we found CERS6-AS1 was upregulated in BC tissues. Experimental results of tumor growth in nude mice show that CERS6-AS1 promotes tumor growth. Furthermore, CERS6-AS1 regulated BC susceptibility gene 1-associated protein 1 (BAP1) expression via sponging miR-125a-5p via Western blot analysis and quantitative polymerase chain reaction arrays. Finally, we showed that miR-125a-5p had opposing effects to those of CERS6-AS1 on BC cells, demonstrating that CERS6-AS1 may promote cell proliferation and inhibit cell apoptosis via sponging miR-125a-5p. Our results indicated CERS6-AS1 promote BC cell proliferation and inhibit cell apoptosis via sponging miR-125a-5p to upregulate BAP1 expression.
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