The PI3K p110alpha isoform regulates endothelial adherens junctions via Pyk2 and Rac1.
The PI3K p110alpha isoform regulates endothelial adherens junctions via Pyk2 and Rac1.
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DOI:
10.1083/jcb.200907135
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发表时间:
2010-03-22
期刊:
影响因子:
--
通讯作者:
Ridley AJ
中科院分区:
文献类型:
--
作者:
Cain RJ;Vanhaesebroeck B;Ridley AJ
Only the p110α isoform of PI3K mediates the association of VE-cadherin with Pyk2, a Rac GEF and the p85 PI3K regulatory subunit, to reduce junctional integrity in response to TNF. Endothelial cell–cell junctions control efflux of small molecules and leukocyte transendothelial migration (TEM) between blood and tissues. Inhibitors of phosphoinositide 3-kinases (PI3Ks) increase endothelial barrier function, but the roles of different PI3K isoforms have not been addressed. In this study, we determine the contribution of each of the four class I PI3K isoforms (p110α, -β, -γ, and -δ) to endothelial permeability and leukocyte TEM. We find that depletion of p110α but not other p110 isoforms decreases TNF-induced endothelial permeability, Tyr phosphorylation of the adherens junction protein vascular endothelial cadherin (VE-cadherin), and leukocyte TEM. p110α selectively mediates activation of the Tyr kinase Pyk2 and GTPase Rac1 to regulate barrier function. Additionally, p110α mediates the association of VE-cadherin with Pyk2, the Rac guanine nucleotide exchange factor Tiam-1 and the p85 regulatory subunit of PI3K. We propose that p110α regulates endothelial barrier function by inducing the formation of a VE-cadherin–associated protein complex that coordinates changes to adherens junctions with the actin cytoskeleton.
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DOI:
10.1111/j.1538-7836.2008.03087.x
发表时间:
2008-09
期刊:
Journal of thrombosis and haemostasis : JTH
影响因子:
--
作者:
Aghajanian A;Wittchen ES;Allingham MJ;Garrett TA;Burridge K
通讯作者:
Burridge K
影响因子:
4
作者:
Dejana, Elisabetta;Orsenigo, Fabrizio;Lampugnani, Maria Grazia
通讯作者:
Lampugnani, Maria Grazia
影响因子:
4.8
作者:
Hudry-Clergeon, H;Stengel, D;Vilgrain, I
通讯作者:
Vilgrain, I
DOI:
10.1083/jcb.200112126
发表时间:
2002-06-24
期刊:
The Journal of cell biology
影响因子:
--
作者:
Barreiro O;Yanez-Mo M;Serrador JM;Montoya MC;Vicente-Manzanares M;Tejedor R;Furthmayr H;Sanchez-Madrid F
通讯作者:
Sanchez-Madrid F
影响因子:
4.8
作者:
Basile, John R.;Gavard, Julie;Gutkind, J. Silvio
通讯作者:
Gutkind, J. Silvio