The PLGF/c-MYC/miR-19a axis promotes metastasis and stemness in gallbladder cancer.

The PLGF/c-MYC/miR-19a axis promotes metastasis and stemness in gallbladder cancer.
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PLGF/c-MYC/miR-19a轴促进胆囊癌的转移和干细胞性

DOI:
10.1111/cas.13585
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发表时间:
2018-05
期刊:
影响因子:
5.7
通讯作者:
Liu Y
Liu Y
中科院分区:
医学2区
文献类型:
--
作者:
Li H;Jin Y;Hu Y;Jiang L;Liu F;Zhang Y;Hao Y;Chen S;Wu X;Liu Y

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胆囊癌是胆道系统最常见的恶性肿瘤。上皮-间充质转化(EMT)在肿瘤转移过程中起着至关重要的作用。间充质样细胞可以作为肿瘤干细胞的来源,这可以赋予EMT表型。胎盘生长因子(PLGF)属于血管内皮生长因子家族,在肿瘤发生发展中起重要作用。然而,PLGF影响胆囊癌EMT的分子机制尚不清楚。在这里,我们显示PLGF在胆囊癌组织中的表达水平高于正常的邻近组织,并且与胆囊癌患者的不良预后有关。外源性PLGF促进GBC细胞的迁移、侵袭和肿瘤球体的形成。相反,PLGF基因敲除降低了GBC细胞的侵袭性表型。机制上,外源PLGF通过激活c-myc上调microRNA-19a(miR-19a)的表达。Spearman相关分析显示PLGF、c-myc和miR-19a在胆囊癌组织中的表达呈正相关。综上所述,这些结果表明PLGF通过上调c-myc诱导miR-19a的表达来促进EMT和肿瘤球体的形成。因此,PLGF有望成为治疗胆囊癌的分子靶点。
Gallbladder cancer (GBC) is the most common malignant tumor of the biliary tract system. Epithelial–mesenchymal transition (EMT) plays a vital role in the process of tumor metastasis. Mesenchymal‐like cells can serve as a source of cancer stem cells, which can confer the EMT phenotype. Placental growth factor (PLGF) belongs to the vascular endothelial growth factor family and plays a vital role in cancer. However, the underlying molecular mechanisms about the influence of PLGF on EMT in GBC remain unknown. Here we show that PLGF expression levels were higher in GBC tissues than in normal adjacent tissues and were associated with poor prognosis in GBC patients. Exogenous PLGF enhanced the migration, invasion, and tumorsphere formation of GBC cells. Conversely, knockdown of PLGF decreased the aggressive phenotype of GBC cells. Mechanistically, exogenous PLGF upregulated microRNA‐19a (miR‐19a) expression through the activation of c‐MYC. Moreover, Spearman's correlation analysis showed a positive pairwise correlation among PLGF, c‐MYC, and miR‐19a expression in GBC tissues. Taken together, these results suggest that PLGF promotes EMT and tumorsphere formation through inducing miR‐19a expression by upregulating c‐MYC. Thus, PLGF could be a promising molecular therapeutic target for GBC.
miR-19a 和 miR-19b 在胶质瘤中过度表达
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发表时间: 2013-10-01
影响因子: 2.8
作者:
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DOI: 10.1016/j.canlet.2012.08.014
发表时间: 2013-09-10
期刊: CANCER LETTERS
影响因子: 9.7
作者:
Lundin, Amber;Driscoll, Barbara
通讯作者: Driscoll, Barbara