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Priming differentially regulates neutrophil adhesion molecule expression/function
Author(s) -
CONDLIFFE A. M.,
CHILVERS E. R.,
HASLETT C.,
DRANSFIELD I.
Publication year - 1996
Publication title -
immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.297
H-Index - 133
eISSN - 1365-2567
pISSN - 0019-2805
DOI - 10.1046/j.1365-2567.1996.d01-711.x
Subject(s) - integrin alpha m , priming (agriculture) , immunology , lipopolysaccharide , biology , respiratory burst , microbiology and biotechnology , cd11a , cell adhesion molecule , cd11c , cd18 , immune system , biochemistry , phenotype , botany , germination , gene
Lung injury in a variety of disease states is critically dependent on neutrophil‐mediated inflammatory responses. Neutrophil recruitment to sites of infection or tissue damage requires co‐ordinated regulation of neutrophil adhesion and activation status. We have examined the effects of treatment of human peripheral blood neutrophils with priming agents [lipopolysaccharide (LPS), tumour necrosis factor‐α (TNF‐α) and platelet‐activating factor (PAF)] upon expression of CD11a, CD11b, CD11c, CD35 and CD62‐L and CD11b function to assess whether subtle regulation of neutrophil adhesion potential accompanies augmented formyl‐methionyl‐leucyl‐phenylalanine‐stimulated superoxide production. We have found that there are differential effects of ‘priming’ concentrations of these agents. For LPS, CD62L loss occurs in the absence of changes in CD11b, whereas for PAF, CD11b up‐regulation occurs in the absence of detectable loss of CD62‐L. However, for TNF‐α, decreased expression of CD62‐L occurs concomitantly with increased expression of CD11b. In addition, we have shown that priming agents augment CD11b functional activity in a manner that parallels the priming of the respiratory burst. Thus, priming agents may differentially regulate neutrophil adhesive capacity and data presented in this manuscript suggest that the increased effector cell function observed in primed cells may be associated with a distinct repertoire of potential adhesive interactions.