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© Research
Publication : Immunity

Role for plastin in host defense distinguishes integrin signaling from cell adhesion and spreading

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Immunity - 01 Jul 2003

Chen H, Mocsai A, Zhang H, Ding RX, Morisaki JH, White M, Rothfork JM, Heiser P, Colucci-Guyon E, Lowell CA, Gresham HD, Allen PM, Brown EJ

Link to Pubmed [PMID] – 12871642

Immunity 2003 Jul;19(1):95-104

Integrin ligation activates both cell adhesion and signal transduction, in part through reorganization of the actin cytoskeleton. Plastins (also known as fimbrins) are actin-crosslinking proteins of the cortical cytoskeleton present in all cells and conserved from yeast to mammals. Here we show that plastin-deficient polymorphonuclear neutrophils (PMN) are deficient in killing the bacterial pathogen Staphylococcus aureus in vivo and in vitro, despite normal phagocytosis. Like integrin beta2-deficient PMN, plastin-deficient PMN cannot generate an adhesion-dependent respiratory burst, because of markedly diminished integrin-dependent syk activation. Unlike beta2(-/-) PMN, plastin-deficient PMN adhere and spread normally. Deficiency of plastin thus separates the classical integrin receptor functions of adhesion and spreading from intracellular signal transduction.

http://www.ncbi.nlm.nih.gov/pubmed/12871642