N(6)-methyladenosine (m(6)A)-mediated lncRNA DLGAP1-AS1enhances breast canceradriamycin resistance through miR-299-3p/WTAP feedback loop.

N(6)-methyladenosine (m(6)A)-mediated lncRNA DLGAP1-AS1enhances breast canceradriamycin resistance through miR-299-3p/WTAP feedback loop.
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DOI:
10.1080/21655979.2021.2000198
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发表时间:
2021-12
期刊:
影响因子:
4.9
通讯作者:
Wang M
Wang M
中科院分区:
生物学2区
文献类型:
--
作者:
Huang T;Cao L;Feng N;Xu B;Dong Y;Wang M

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化疗耐药被认为是乳腺癌治疗的障碍,此外,越来越多的证据表明,长非编码RNA(LncRNAs)参与了乳腺癌阿霉素(ADR)耐药的调节。在这里,我们的工作表明,在耐药BC细胞(MCF-7/ADR)中,lncRNA DLGAP1反义RNA 1(DLGAP1-AS1)表达上调。临床上,DLGAP1-AS1高表达与临床预后不良密切相关。结果表明,DLGAP1-AS1对ADR的IC50有促进作用,并能促进耐药细胞的增殖。此外,N6-甲基腺苷(M6A)甲基转移酶WT1相关蛋白(WTAP)与DLGAP1-AS1的m6A修饰位点结合并促进其稳定性。机制上,DLGAP1-AS1通过3个ʹ-非翻译区(3ʹ-UtR)结合海绵miR-299-3p,从而解除对WTAP的抑制,从而上调WTAP的表达。综上所述,上述研究结果表明,LncRNA DLGAP1-AS1通过WTAP/DLGAP1-AS1/miR-299-3p反馈环促进Bc对ADR的抗性。
Chemotherapy resistance is identified as an obstacle for breast cancer (BC) therapy, and, besides, increasing evidence indicates that long-noncoding RNAs (lncRNAs) participate in the regulation of BC adriamycin (ADR) resistance. Here, our work shows that lncRNA DLGAP1 antisense RNA 1 (DLGAP1-AS1) is up-regulated in ADR-resistant BC cells (MCF-7/ADR). Clinically, higher DLGAP1-AS1 expression was closely correlated to poorer clinical prognosis. Results showed that DLGAP1-AS1 promoted the ADR IC50 and proliferation of ADR-resistant cells. Moreover, N6-methyladenosine (m6A) methyltransferase WT1 associated protein (WTAP) binds to the m6A modified site of DLGAP1-AS1 and motivates its stability. Mechanistically, DLGAP1-AS1 sponged miR-299-3p through 3ʹ-untranslated region (3ʹ-UTR) binding, which in turn relieved the repression of WTAP and thus upregulated WTAP expression. In conclusion, above findings conclude that lncRNA DLGAP1-AS1 promotes BC ADR-resistance through WTAP/DLGAP1-AS1/miR-299-3p feedback loop.
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