Roles and mechanism of miR-199a and miR-125b in tumor angiogenesis.
Roles and mechanism of miR-199a and miR-125b in tumor angiogenesis.
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DOI:
10.1371/journal.pone.0056647
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Jiang Y
中科院分区:
文献类型:
--
作者:
He J;Jing Y;Li W;Qian X;Xu Q;Li FS;Liu LZ;Jiang BH;Jiang Y
MicroRNAs (miRNAs) have been shown to be involved in different aspects of cancer biology including tumor angiogenesis. In this study, we identified that two miRNAs, miR-199a and miR-125b were downregulated in ovarian cancer tissues and cell lines. Overexpression of miR-199a and miR-125b inhibited tumor-induced angiogenesis associated with the decrease of HIF-1α and VEGF expression in ovarian cancer cells. Moreover, the levels of miR-199a and miR-125b were negatively correlated with VEGF mRNA levels in ovarian tissues. We further showed that direct targets of miR-199a and miR-125b HER2 and HER3 were functionally relevant. Forced expression of HER2 and HER3 rescued miR-199a- and miR-125b-inhibiting angiogenesis responses and Akt/p70S6K1/HIF-1α pathway. This study provides a rationale for new therapeutic approach to suppress tumor angiogenesis using miR-199a, miR-125b, or their mimics for ovarian cancer treatment in the future.
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