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TGF-β1 通过上调 DDR1 和交联胶原 I 促进肝癌细胞线性侵入小体的形成。

TGF-β1 promotes linear invadosome formation in hepatocellular carcinoma cells, through DDR1 up-regulation and collagen I cross-linking.

机构信息

Mohammed 6 University of health Sciences (UM6SS), Faculty of Medicine, National Laboratory of Reference, Casablanca, Morocco.

INSERM, U1053 Bordeaux Research In Translational Oncology, BaRITOn, F-33000 Bordeaux, France; Univ. Bordeaux, U1053 Bordeaux Research In Translational Oncology, BaRITOn, F-33000 Bordeaux, France.

出版信息

Eur J Cell Biol. 2016 Nov;95(11):503-512. doi: 10.1016/j.ejcb.2016.09.003. Epub 2016 Oct 4.

Abstract

Transforming growth factor-β1 (TGF-β1) is an important player in chronic liver diseases inducing fibrogenesis and hepatocellular carcinoma (HCC) development. TGF-β1 promotes pleiotropic modifications at the cellular and matrix microenvironment levels. TGF-β1 was described to enhance production of type I collagen and its associated cross-linking enzyme, the lysyl oxidase-like2 (LOXL2). In addition, TGF-β1 and type I collagen are potent inducers of invadosomes. Indeed, type I collagen fibers induce the formation of active linear invadosomes through the discoidin domain receptor 1 (DDR1). The goal of our study was to address the role of TGF-β1 in collagen cross-linking and its impact on the formation of linear invadosomes in liver cancer cells. We first report a significant correlation between expressions of TGF-β1, and type I collagen, LOXL2, DDR1 and MT1-MMP in human HCCs. We demonstrate that TGF-β1 promotes a Smad4-dependent up-regulation of DDR1, together with LOXL2, in cultured HCC cells. Moreover, we show that LOXL2-induced collagen cross-linking enhances linear invadosome formation. Altogether, our data demonstrate that TGF-β1 favors linear invadosome formation through the expressions of both the inducers, such as collagen and LOXL2, and the components such as DDR1 and MT1-MMP of linear invadosomes in cancer cells. Meanwhile, our data uncover a new TGF-β1-dependent regulation of DDR1 expression.

摘要

转化生长因子-β1(TGF-β1)是一种在慢性肝脏疾病中诱导纤维化和肝细胞癌(HCC)发展的重要因子。TGF-β1 在细胞和基质微环境水平上促进多效性修饰。TGF-β1 被描述为增强 I 型胶原及其相关交联酶赖氨酰氧化酶样 2(LOXL2)的产生。此外,TGF-β1 和 I 型胶原是侵袭小体的有效诱导剂。事实上,I 型胶原纤维通过 discoidin 域受体 1(DDR1)诱导活性线性侵袭小体的形成。我们研究的目的是探讨 TGF-β1 在胶原交联中的作用及其对肝癌细胞中线性侵袭小体形成的影响。我们首先报告了 TGF-β1 与 I 型胶原、LOXL2、DDR1 和 MT1-MMP 在人 HCC 中的表达之间存在显著相关性。我们证明 TGF-β1 在培养的 HCC 细胞中促进 Smad4 依赖性上调 DDR1,以及 LOXL2。此外,我们表明 LOXL2 诱导的胶原交联增强了线性侵袭小体的形成。总之,我们的数据表明,TGF-β1 通过诱导物(如胶原和 LOXL2)和线性侵袭小体的成分(如 DDR1 和 MT1-MMP)的表达,促进癌细胞中线性侵袭小体的形成。同时,我们的数据揭示了 TGF-β1 对 DDR1 表达的一种新的依赖性调节。

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