title: Effects of thalidomide on neutrophil respiratory burst, chemotaxis, and transmigration of cytokine- and endotoxin-activated endothelium.
abstract: Vascular endothelium activated by endotoxin and cytokines plays an important role in organ inflammation and blood leukocyte recruitment. Neutrophils, which are a homogeneous population of effector cells, are rapidly attracted in large numbers to sites of inflammation where they form an early response to infection or injury. Excessive production of various interleukins, TNF, arachidonic acid metabolites, and other substances by neutrophils and macrophages results in systemic endothelial cell injury, a fundamental problem. In the present study, we investigated in vitro the effects of thalidomide (THD) on activation of endothelial cells for enhanced transmigration of neutrophils by lipopolysaccharide (LPS), tumor necrosis factor-alpha (TNF), and interleukin-1 (IL-1). Modulation of endotoxin- and cytokine-induced neutrophil chemotaxis and respiratory burst by THD were also studied. Treatment of HUVEC with THD in combination with LPS, TNF, and IL-1, respectively, antagonized LPS-activated transmigration of neutrophils but stimulated the effects of TNF and IL-1. All of the agents used-THD, LPS, TNF, and IL-1-inhibited neutrophil chemotaxis. Addition of THD to the neutrophils had no effect on LPS-inhibited chemotaxis whereas the TNF- and IL-1-induced chemotaxis was modulated in a bimodal manner. However, THD failed to influence neutrophil respiratory burst activity. Results demonstrate that THD differentially affects mediator-induced activation of HUVEC and neutrophils.
authors.affiliation: Universitätsklinik für Innere Medizin, Innsbruck, Austria.
authors.forename: S
authors.initials: S
authors.lastname: Dunzendorfer
authors.forename: P
authors.initials: P
authors.lastname: Schratzberger
authors.forename: N
authors.initials: N
authors.lastname: Reinisch
authors.forename: C M
authors.initials: CM
authors.lastname: Kähler
authors.forename: C J
authors.initials: CJ
authors.lastname: Wiedermann
mesh_terms: D002478:Cells, Cultured; D002633:Chemotaxis / Q000187:drug effects*; D016207:Cytokines / Q000502:physiology; D004347:Drug Interactions; D004730:Endothelium, Vascular / Q000187:drug effects* / Q000378:metabolism; D006801:Humans; D008070:Lipopolysaccharides / Q000494:pharmacology; D009504:Neutrophils / Q000187:drug effects* / Q000378:metabolism; D016897:Respiratory Burst / Q000187:drug effects*; D013723:Teratogens / Q000494:pharmacology*; D013792:Thalidomide / Q000494:pharmacology*
chemical_list: D016207:Cytokines; D008070:Lipopolysaccharides; D013723:Teratogens; D013792:Thalidomide