Control of adhesion-dependent cell survival by focal adhesion kinase.

Control of adhesion-dependent cell survival by focal adhesion kinase.
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DOI:
10.1083/jcb.134.3.793
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发表时间:
1996-08
影响因子:
7.8
通讯作者:
ChanHui, PY
ChanHui, PY
中科院分区:
生物学1区
文献类型:
--
作者:
Frisch, SM;Vuori, K;Ruoslahti, E;ChanHui, PY

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整合素与细胞外基质蛋白的相互作用可以激活粘着斑激酶(FAK)并抑制正常上皮和内皮细胞的凋亡;这种凋亡亚型被称为“失巢凋亡”。“在这里,我们证明FAK在抑制失巢凋亡中发挥作用。组成性激活形式的FAK拯救了两个已建立的上皮细胞系的失巢凋亡。主要的自磷酸化位点(Y397)和FAK激酶活性的关键位点(K454)都是这种作用所必需的。活化的FAK也转化MDCK细胞,通过在裸鼠中的锚定非依赖性生长和肿瘤形成的标准。我们提供的证据表明,这种转变主要是由于细胞的抗失巢凋亡,而不是从生长因子反应途径的激活。这些结果表明FAK可以调节失巢凋亡,并且赋予失巢凋亡抗性可能足以转化某些上皮细胞。
The interactions of integrins with extracellular matrix proteins can activate focal adhesion kinase (FAK) and suppress apoptosis in normal epithelial and endothelial cells; this subset of apoptosis has been termed "anoikis." Here, we demonstrate that FAK plays a role in the suppression of anoikis. Constitutively activated forms of FAK rescued two established epithelial cell lines from anoikis. Both the major autophosphorylation site (Y397) and a site critical to the kinase activity (K454) of FAK were required for this effect. Activated FAK also transformed MDCK cells, by the criteria of anchorage-independent growth and tumor formation in nude mice. We provide evidence that this transformation resulted primarily from the cells' resistance to anoikis rather than from the activation of growth factor response pathways. These results indicate that FAK can regulate anoikis and that the conferral of anoikis resistance may suffice to transform certain epithelial cells.
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