The repressive effect of miR-148a on TGF beta-SMADs signal pathway is involved in the glabridin-induced inhibition of the cancer stem cells-like properties in hepatocellular carcinoma cells.

The repressive effect of miR-148a on TGF beta-SMADs signal pathway is involved in the glabridin-induced inhibition of the cancer stem cells-like properties in hepatocellular carcinoma cells.
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DOI:
10.1371/journal.pone.0096698
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Li Y
Li Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Jiang F;Mu J;Wang X;Ye X;Si L;Ning S;Li Z;Li Y

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肝细胞癌(HCC)是全球癌症相关死亡的第三大原因。由于癌症干细胞 (CSC) 介导的术后复发,目前治疗 HCC 的标准做法不太令人满意。因此,靶向CSCs或具有CSCs样特性的癌细胞已成为治疗HCC的新方法。 GLA 具有抗肿瘤作用,可减弱人类癌细胞的增殖、迁移、侵袭和血管生成。然而,GLA 在调节 HCC 细胞中 CSC 样特性中的功能及其潜在的分子机制仍不清楚。在这里,我们发现 GLA 通过 microRNA-148a (miR-148a) 介导的对 HCC 细胞系(HepG2、Huh-7 和 MHCC97H)中转化生长因子 β (TGF-β)/SMAD2 信号通路的抑制来减弱 CSC 样特性。事实上,GLA 抑制 TGFβ 诱导的和内源性 SMAD2 的激活/表达。此外,GLA 以剂量/时间依赖性方式改善 miR-148a 的表达。 MiR-148a 靶向 SMAD2-3'UTR,降低 SMAD2 的表达和功能。 miR-148a 的敲低消除了 GLA 诱导的对 TGF-β/SMAD2 信号通路的抑制以及 HCC 细胞中的 CSC 样特性。我们的研究发现了一种新机制,即 GLA 通过 miR-148a 介导的 TGF-β/SMAD2 信号通路抑制来抑制 HCC 细胞的 CSC 样特性,这可能有助于确定 HCC 治疗的潜在靶点。
Hepatocellular carcinoma (HCC) is the third leading cause of cancer-related mortality worldwide. Current standard practices for treatment of HCC are less than satisfactory because of cancer stem cells (CSCs)-mediated post-surgical recurrence. For this reason, targeting the CSCs or the cancer cells with CSCs-like properties has become a new approach for the treatment of HCC. GLA exhibits anti-tumor effects in that it attenuates the proliferation, migration, invasion, and angiogenesis of human cancer cells. However, the functions of GLA in the regulation of CSCs-like properties in HCC cells, and the molecular mechanisms underlying in remain obscure. Here we found that GLA attenuated the CSCs-like properties by the microRNA-148a (miR-148a)-mediated inhibition of transforming growth factor beta (TGF-β)/SMAD2 signal pathway in HCC cell lines (HepG2, Huh-7, and MHCC97H). Indeed, GLA inhibited the activations/expressions of both TGFβ-induced and the endogenous SMAD2. Further, GLA improved the expression of miR-148a in a dose/time-dependent manner. MiR-148a, which targeted the SMAD2-3′UTR, decreased the expression and function of SMAD2. Knockdown of miR-148a abolished the GLA-induced inhibition of TGF-β/SMAD2 signal pathway and the CSCs-like properties in HCC cells. Our study found a novel mechanism that GLA inhibits the CSCs-like properties of HCC cells by miR-148a-mediated inhibition of TGF-β/SMAD2 signal pathway, which may help to identify potential targets for the therapies of HCC.
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发表时间: 2013-04
期刊: Hepatology (Baltimore, Md.)
影响因子: --
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期刊: HEPATOLOGY
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影响因子: 5.2
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发表时间: 2011-12-01
影响因子: 2.9
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DOI: 10.1053/j.seminoncol.2012.05.011
发表时间: 2012-08
影响因子: 4
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