Impact of carbamylation on type I collagen conformational structure and its ability to activate human polymorphonuclear neutrophils.
Fiche publication
Date publication
février 2006
Auteurs
Membres identifiés du Cancéropôle Est :
Pr SOCKALINGUM Ganesh
Tous les auteurs :
Jaisson S, Lorimier S, Ricard-Blum S, Sockalingum GD, Delevallee-Forte C, Kegelaer G, Manfait M, Garnotel R, Gillery P
Lien Pubmed
Résumé
Carbamylation by urea-derived cyanate is a posttranslational modification of proteins increasing during chronic renal insufficiency, which alters structural and functional properties of proteins and modifies their interactions with cells. We report here the major structural alterations of type I collagen induced by carbamylation. Biophysical methods revealed that carbamylated collagen retained its triple-helical structure, but that slight changes destabilized some regions within the triple helix and decreased its ability to polymerize into normal fibrils. These changes were associated with the incapacity of carbamylated collagen to stimulate polymorphonuclear neutrophil oxidative functions. This process involved their interaction with LFA-1 integrin, but no subsequent p(125)FAK phosphorylation. Carbamylation of collagen might alter interactions between collagen and inflammatory cells in vivo and interfere with the normal remodeling of extracellular matrix, thus participating in the pathophysiological processes occurring during renal insufficiency.
Référence
Chem Biol. 2006 Feb;13(2):149-59.