Role of cell-bound hemolysin as a pathogenicity factor for Serratia infections

作者：Wolfgang König, Y Faltin, Johannes J. C. Scheffer, H Schöffler, V Braun · 发表于：Infection and Immunity · 年份：1987 · DOI：10.1128/iai.55.11.2554-2561.1987 · 被引用次数：62 · 研究领域：Antimicrobial Peptides and Activities、Aquaculture disease management and microbiota、Bacterial biofilms and quorum sensing

The hemolytic activities of clinical isolates of Serratia marcescens, of Serratia liquefaciens, and of Escherichia coli strains containing a cloned hemolysin gene of S. marcescens were determined. Hemolysis was induced only by cells and not by spent media. The hemolytically active bacteria induced the release of the leukotriene C4 and of much less leukotriene B4 from polymorphonuclear leukocytes, the release of histamine from rat mast cells, and chemoluminescence of neutrophils. The hemolytic activity was correlated with the response of the leukocytes, but quantitative differences were recorded with regard to the release of the inflammatory mediators. Therefore, other factors in addition to the hemolysin contribute to the stimulation of leukotriene generation and histamine release. It is concluded that the hemolysin via these inflammatory mediators can increase vascular permeability, edema formation, and granulocyte accumulation and thus contributes to the pathogenicity of Serratia species.