MicroRNA-320a inhibits proliferation and invasion of breast cancer cells by targeting RAB11A.

MicroRNA-320a inhibits proliferation and invasion of breast cancer cells by targeting RAB11A.
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MicroRNA-320a 通过靶向 RAB11A 抑制乳腺癌细胞的增殖和侵袭。

DOI:
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发表时间:
2015-08
期刊:
Am J Cancer Res
影响因子:
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通讯作者:
She Chen
She Chen
中科院分区:
其他
文献类型:
--
作者:
Biyun Wang;Ziang Yang;Hong Wang;Zhigang Cao;Yannan Zhao;Chengcheng Gong;Lijie Ma;Xiaoxiao Wang;Xichun Hu;She Chen

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MicroRNA (miRNA) 在包括乳腺癌 (BC) 在内的多种癌症中不受管制。 miR-320a 失调与不同的恶性肿瘤相关,但其预后意义仍不清楚。在这里,我们检查了 miR-320a 在 BC 中的作用并探讨了潜在的机制。我们的结果表明,miR-320a 在 BC 细胞系和组织中显着下调,其异位表达抑制体外细胞增殖、迁移和侵袭以及小鼠异种移植模型中的肿瘤生长。我们确定 Rab11a 是 miR-320a 的直接靶标,并表明其表达在肿瘤样本中上调,并且与 miR-320a 的表达呈负相关。在 BC 细胞中,Rab11a 通过 miR-320a 的下调伴随着 Akt 的失活。 Rab11a 的过表达消除了 miR-320a 诱导的 BC 生长和侵袭抑制。这些结果表明,miR-320a 可能通过涉及调节 Rab11a 表达和激活 Akt 信号通路的机制在 BC 中充当肿瘤抑制因子。因此,miR-320a 可以作为 BC 的生物标志物,其表达的调节可能代表 BC 治疗的一种新的治疗策略。
MicroRNAs (miRNAs) are deregulated in many types of cancer including breast cancer (BC). miR-320a dysregulation has been associated with different malignancies although its prognostic significance remains unclear. Here, we examined the role of miR-320a in BC and explored the underlying mechanisms. Our results showed that miR-320a was significantly downregulated in BC cell lines and tissues, and its ectopic expression inhibited cell proliferation, migration, and invasion in vitro and tumor growth in a mouse xenograft model. We identified Rab11a as a direct target of miR-320a and showed that its expression was upregulated in tumor samples and inversely correlated with the expression of miR-320a. In BC cells, the downregulation of Rab11a through miR-320a was concomitant with the inactivation of Akt. Overexpression of Rab11a abrogated miR-320a-induced inhibition of BC growth and invasion. These results suggest that miR-320a may act as a tumor suppressor in BC through a mechanism involving the modulation of Rab11a expression and the activation of the Akt signaling pathway. miR-320a may therefore serve as a biomarker for BC, and the modulation of its expression may represent a novel therapeutic strategy in BC treatment.
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发表时间: 2015-03-04
期刊: Scientific reports
影响因子: 4.6
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