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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Tetraspanin CD151 regulates α6β1 integrin adhesion strengthening
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Tetraspanin CD151 regulates α6β1 integrin adhesion strengthening

机译:四跨素CD151调节α6β1整联蛋白的粘附增强

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摘要

The tetraspanin CD151 molecule associates specifically with laminin-binding integrins, including α6β1, To probe strength of α6β1-dependent adhesion to laminin-1, defined forces (0-1.5 nN) were applied to magnetic laminin-coated microbeads bound to NIH 3T3 cells. For NIH 3T3 cells bearing wild-type CD151, adhesion strengthening was observed, as bead detachment became more difficult over time. In contrast, mutant CD151 (with the C-terminal region replaced) showed impaired adhesion strengthening. Static cell adhesion to laminin-1, and detachment of beads coated with fibronectin or anti-α6 antibody were all unaffected by CD151 mutation. Hence, CD151 plays a key role in selectively strengthening α6β1 integrin-mediated adhesion to laminin-1.
机译:该四跨膜蛋白CD151分子与层粘连蛋白结合整联蛋白(包括α6β1)特异性缔合。为了探测与层粘连蛋白1的α6β1依赖性粘附强度,向结合到NIH 3T3细胞的层粘连蛋白磁性磁珠施加了确定的力(0-1.5 nN)。对于带有野生型CD151的NIH 3T3细胞,随着时间的推移珠子分离变得更加困难,观察到了粘附增强。相反,突变体CD151(替换了C端区域)显示出粘附增强受损。静态细胞对层粘连蛋白1的粘附以及涂有纤连蛋白或抗α6抗体的珠的分离均不受CD151突变的影响。因此,CD151在选择性增强α6β1整合素介导的层粘连蛋白-1粘附中起关键作用。

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