Very late antigen-4 in CD18-independent neutrophil emigration during acute bacterial pneumonia in mice

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This study tested the hypothesis that very late antigen (VLA)-4 mediates CD18-independent neutrophil emigration into the air-spaces induced by either Streptococcus pneumoniae, a stimulus that induces primarily CD18-independent neutrophil emigration, or Escherichia coli, toward which only 20-30% of the total number of neutrophils emigrate through CD18-independent pathways. In wild-type (WT) mice, VLA-4 expression was less on neutrophils that emigrated into the airspaces than on circulating neutrophils. Vascular cell adhesion molecule-1 (VCAM-1) mRNA, the major endothelial...
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