MiR-373 targeting of the Rab22a oncogene suppresses tumor invasion and metastasis in ovarian cancer.

MiR-373 targeting of the Rab22a oncogene suppresses tumor invasion and metastasis in ovarian cancer.
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MiR-373靶向Rab22a癌基因抑制卵巢癌的肿瘤侵袭和转移

DOI:
10.18632/oncotarget.2577
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发表时间:
2014-12-15
期刊:
影响因子:
--
通讯作者:
Zhang S
Zhang S
中科院分区:
其他
文献类型:
--
作者:
Zhang Y;Zhao FJ;Chen LL;Wang LQ;Nephew KP;Wu YL;Zhang S

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转移是卵巢癌患者死亡的主要原因。miR-373已被证明在肿瘤发生和转移中起关键作用;然而,miR-373在卵巢癌中的作用尚未研究。在这项研究中,我们发现miR-373在人类上皮性卵巢癌(EOC)中表达下调,并与临床分期和组织学分级呈负相关。miR-373在人EOC细胞中的异位过表达抑制了体外细胞侵袭和体内转移以及上皮-间质转化过程。沉默miR-373的表达导致EOC细胞的迁移和侵袭增加。利用整合的生物信息学分析、基因表达阵列和荧光素酶测定,我们鉴定Rab 22 a为EOC细胞中miR-373的直接和功能性靶点。在人EOC组织中,miR-373的表达水平与Rab 22 a蛋白水平呈负相关。Rab 22 a基因敲低可抑制EOC细胞的侵袭和迁移,增加E-cadherin的表达,抑制N-cadherin的表达。此外,Rab 22 a的过表达废除了miR-373诱导的EOC细胞的侵袭和迁移。综上所述,这些结果表明,miR-373通过直接靶向Rab 22 a基因抑制EOC侵袭和转移,Rab 22 a基因是EOC的一个新的潜在治疗靶点。
Metastasis is major cause of mortality in patients with ovarian cancer. MiR-373 has been shown to play pivotal roles in tumorigenesis and metastasis; however, a role for miR-373 in ovarian cancer has not been investigated. In this study, we show that the miR-373 expression is down-regulated in human epithelial ovarian cancer (EOC) and inversely correlated with clinical stage and histological grade. Ectopic overexpression of miR-373 in human EOC cells suppressed cell invasion in vitro and metastasis in vivo, and the epithelial–mesenchymal transition process. Silencing the expression of miR-373 resulted in an increased migration and invasion of EOC cells. Using integrated bioinformatics analysis, gene expression arrays, and luciferase assay, we identified Rab22a as a direct and functional target of miR-373 in EOC cells. Expression levels of miR-373 were inversely correlated with Rab22a protein levels in human EOC tissues. Rab22a knockdown inhibited invasion and migration of EOC cells, increased E-cadherin expression, and suppressed the expression of N-cadherin. Moreover, overexpression of Rab22a abrogated miR-373-induced invasion and migration of EOC cells. Taken together, these results demonstrate that miR-373 suppresses EOC invasion and metastasis by directly targeting Rab22a gene, a new potential therapeutic target in EOC.
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