Abstract
Selectins mediate leukocyte rolling and prime leukocytes for integrin-mediated leukocyte adhesion. However, neither the in vivo importance of nor the signaling pathway by which selectin-mediated integrin activation occurs has been determined. We report here that P-selectin-deficient mice manifested impaired leukocyte adhesion, which was 'rescued' by soluble P-selectin. Mechanistically, the cytoplasmic domain of P-selectin glycoprotein ligand 1 formed a constitutive complex with Nef-associated factor 1. After binding of P-selectin, Src kinases phosphorylated Nef-associated factor 1, which recruited the phosphoinositide-3-OH kinase p85-p110δ heterodimer and resulted in activation of leukocyte integrins. Inhibition of this signal-transduction pathway diminished the adhesion of leukocytes to capillary venules and suppressed peritoneal infiltration of leukocytes. Our data demonstrate the functional importance of this newly identified signaling pathway mediated by P-selectin glycoprotein ligand 1.
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Change history
13 November 2013
In the version of this article initially published, in Figure 4b the row labeled 'IB: α-PSGL-1 monomer' is incorrect; it is a duplicate of the row above. The error has been corrected in the HTML and PDF versions of the article.
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Acknowledgements
We thank B. Vanhaesebroeck (Ludwig Institute for Cancer Research) for p110δ-mutant mice; J. Downward (Imperial Cancer Research Fund) for the plasmid encoding p85; and L. Li (Shanghai Institutes for Biological Sciences) for the plasmid encoding PTEN. Supported by the National Science Foundation of China (30370694, 30421005, 30623003, 30400245 and 30630036), the Ministry of Science and Technology of China (2002CB513006, 2006CB943902 and 2006AA02Z169), the Chinese Academy of Sciences (KSCX2-YW-R-67 and KJCX2-YW-H08), the Shanghai Municipal Commission for Science and Technology (04JC14078, 06DZ22032, 55407035 and 058014578) and the National Institutes of Health (RO1AI064743 and P50HL081011).
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H.-B.W., J.-T.W., L.Z., Z.H.G., W.-L.X. and T.X. did the research and analyzed the data; Y.H., X.Z., E.F.P., M.C. and J.-G.G. designed the research; and J.-G.G. wrote the manuscript.
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The authors have applied for a patent in China based on this work (application 200710041403.0).
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Wang, HB., Wang, JT., Zhang, L. et al. P-selectin primes leukocyte integrin activation during inflammation. Nat Immunol 8, 882–892 (2007). https://doi.org/10.1038/ni1491
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DOI: https://doi.org/10.1038/ni1491