期刊
MATRIX BIOLOGY
卷 30, 期 3, 页码 207-217出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matbio.2011.03.003
关键词
K-ras; Integrin; MT1-MMP; Syndecan; Invasion; Contraction
资金
- Academy of Finland
- Finnish Cancer Organisations
- EMBO
- ERC
- University of Turku
- Sigrid Juselius Foundation
- Emil Aaltonen Foundation
- Orion and Farmos Research Foundation
- K. Albin Johansson's Foundation
- Instrumentarium Foundation
- Paulo Foundation
- Finnish Cultural Foundation
- Finnish Cultural Varsinais Foundation-Suomi Regional Fund
- Maud Kuistila Foundation
- Waldemar von Frenckell Foundation
- Turku University Foundation
- Turku Graduate School for Biomedical Sciences
Syndecans function as co-receptors for integrins on different matrixes. Recently, syndecan-1 has been shown to be important for alpha 2 beta 1 integrin-mediated adhesion to collagen in tumor cells by regulating cell adhesion and migration on two-dimensional collagen. However, the function of syndecans in supporting alpha 2 beta 1 integrin interactions with three-dimensional (3D) collagen is less well studied. Using loss-of-function and overexpression experiments we show that in 3D collagen syndecan-4 supports alpha 2 beta 1-mediated collagen matrix contraction. Cell invasion through type I collagen containing 3D extracellular matrix (ECM) is driven by alpha 2 beta 1 integrin and membrane type-1 matrix metalloproteinase (MT1-MMP). Here we show that mutational activation of K-ras correlates with increased expression of alpha 2 beta 1 integrin, MT1-MMP, syndecan-1, and syndecan-4. While K-ras-induced alpha 2 beta 1 integrin and MT1-MMP are positive regulators of invasion, silencing and overexpression of syndecans demonstrate that these proteins inhibit cell invasion into collagen. Taken together, these data demonstrate the existence of a complex interplay between integrin alpha 2 beta 1, MT1-MMP, and syndecans in the invasion of K-ras mutant cells in 3D collagen that may represent a mechanism by which tumor cells become more invasive and metastatic. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据