Integrin α9 Suppresses Hepatocellular Carcinoma Metastasis by Rho GTPase Signaling.

Integrin α9 Suppresses Hepatocellular Carcinoma Metastasis by Rho GTPase Signaling.
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整合素 α 9 通过 Rho GTPase 信号传导抑制肝细胞癌转移

DOI:
10.1155/2018/4602570
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发表时间:
2018
影响因子:
4.1
通讯作者:
Zhang XL
Zhang XL
中科院分区:
医学3区
文献类型:
--
作者:
Zhang YL;Xing X;Cai LB;Zhu L;Yang XM;Wang YH;Yang Q;Nie HZ;Zhang ZG;Li J;Zhang XL

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整合素α 9亚基(ITGA 9)通过与不同种类的细胞外基质(ECM)成分结合来介导细胞与细胞和细胞与基质的粘附、细胞迁移和侵袭。然而,其在肝细胞癌(HCC)中的潜在作用和潜在的分子机制仍不清楚。我们发现ITGA 9在HCC患者中的表达明显降低,与HCC的生长和转移呈负相关。ITGA 9过表达显著抑制体外细胞增殖和迁移以及体内肿瘤生长和转移。我们的数据表明,ITGA 9对HCC细胞运动的抑制作用与粘着斑激酶(FAK)和c-Src酪氨酸激酶(Src)的磷酸化降低,粘着斑重组中断,Rac 1和RhoA活性降低有关。我们的数据表明,ITGA 9作为HCC的抑制因子,通过FAK/Src-Rac 1/RhoA信号传导阻止肿瘤细胞的迁移和侵袭。
Integrin subunit alpha 9 (ITGA9) mediates cell-cell and cell-matrix adhesion, cell migration, and invasion through binding different kinds of extracellular matrix (ECM) components. However, its potential role and underlying molecular mechanisms remain unclear in hepatocellular carcinoma (HCC). Here, we found that ITGA9 expression was obviously decreased in patients with HCC, which was negatively correlated with HCC growth and metastasis. ITGA9 overexpression significantly inhibited cell proliferation and migration in vitro as well as tumor growth and metastasis in vivo. Our data demonstrated that the inhibitory effect of ITGA9 on HCC cell motility was associated with reduced phosphorylation of focal adhesion kinase (FAK) and c-Src tyrosine kinase (Src), disrupted focal adhesion reorganization, and decreased Rac1 and RhoA activity. Our data suggest ITGA9, as a suppressor of HCC, prevents tumor cell migration and invasiveness through FAK/Src-Rac1/RhoA signaling.
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