title: Effects of an anion channel blocker, 4, 4'-diisothiocyano-2,2'-disulfonic acid stilbene (DIDS), on human neutrophil function.
abstract: We investigated the capacity of DIDS to influence degranulation and superoxide anion (O-2) generation by human neutrophils exposed to soluble, surface-active stimuli. DIDS caused a concentration-related (25-200 microM) inhibition of myeloperoxidase (MPO) release from N-formyl-methionyl-leucyl-phenylalanine (FMLP), 5(S), 12(R)-dihydroxy-6, 14-cis-8, 10-trans-eicosatetraenoic acid (LTB4), 1-0-hexadecyl/octadecyl-2-0-acetyl-sn-glyceryl-3-phosphorylcholine (AGEPC) and phorbol myristate acetate (PMA)-stimulated neutrophils. In contrast, DIDS had no effect on O-2 production by FMLP and PMA activated cells, whereas it enhanced LTB4 and AGEPC-elicited O-2 generation. The respective effects of DIDS on these neutrophil activities were reversed by washing the cells prior to exposure to stimulus. Thus, DIDS represents a useful pharmacologic probe for investigating the role(s) of anions in the mechanisms of neutrophil activation with structurally and chemically dissimilar stimuli.
mesh_terms: D017878:4,4'-Diisothiocyanostilbene-2,2'-Disulfonic Acid; D012856:4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic Acid / Q000031:analogs & derivatives / Q000494:pharmacology*; D002462:Cell Membrane / Q000187:drug effects / Q000378:metabolism; D002463:Cell Membrane Permeability / Q000187:drug effects; D003571:Cytochalasin B / Q000494:pharmacology; D003594:Cytoplasmic Granules / Q000187:drug effects / Q000201:enzymology; D005089:Exocytosis / Q000187:drug effects; D006801:Humans; D066298:In Vitro Techniques; D007700:Kinetics; D009240:N-Formylmethionine Leucyl-Phenylalanine / Q000494:pharmacology; D009504:Neutrophils / Q000187:drug effects* / Q000378:metabolism; D010972:Platelet Activating Factor / Q000494:pharmacology; D013267:Stilbenes / Q000494:pharmacology*; D013481:Superoxides / Q000097:blood
chemical_list: D010972:Platelet Activating Factor; D013267:Stilbenes; D013481:Superoxides; D012856:4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic Acid; D003571:Cytochalasin B; D009240:N-Formylmethionine Leucyl-Phenylalanine; D017878:4,4'-Diisothiocyanostilbene-2,2'-Disulfonic Acid