期刊
JOURNAL OF INFECTIOUS DISEASES
卷 185, 期 9, 页码 1297-1306出版社
UNIV CHICAGO PRESS
DOI: 10.1086/340236
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资金
- NIAID NIH HHS [AI-09504] Funding Source: Medline
The effects of purified toxin A in vitro on the shape and function of polymorphonuclear leukocytes (PMNL) were examined. Toxin A induced changes in adherent PMNL shape from a compact spherical or pyramidal shape to a thin and ropelike shape. This change in shape was accompanied by rearrangement of the F-actin cytoskeleton into aggregates. Toxin A-treated PMNL exhibited increased adherence and expressed less L-selectin and more Mac-1, compared with untreated PMNL. In contrast to these proinflammatory actions, toxin A impaired both directed and nondirected PMNL migration in response to N-formylmethionylleucylphenylalanine. In addition, toxin A decreased the oxidative activity of adherent PMNL stimulated by recombinant human tumor necrosis factor-alpha. These effects could be explained by toxin A-induced glucosylation of the signaling small-size guanine 5'-triphosphate-binding proteins of the Rho family in human PMNL.
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