Effect of disodium cromoglycate on activation of human eosinophils and neutrophils following reversed (anti-IgE) anaphylaxis.
Immunological release of histamine and lipid mediators is known to occur when basophils, contained in whole blood human leucocytes, are incubated with anti-IgE (reversed anaphylaxis). In the present study we show that IgE-dependent stimulation of basophils was associated with activation of bystander eosinophils and neutrophils, as assessed by enhanced complement (C3b) and IgG (Fc) rosettes, and increased cytotoxicity for complement-coated schistosomula of Schistosoma mansoni. These changes in eosinophil and neutrophil function were totally inhibited in a dose-dependent fashion by prior incubation with disodium cromoglycate (DSCG). In all in vitro systems examined, complete inhibition of enhancement was observed with concentrations as low as 10(-7) moles/l. In contrast, DSCG had no effect on histamine release, or the percentage of rosettes or cytotoxicity prior to anti-IgE stimulation. These results suggest that DSCG inhibits activation of inflammatory cells consequent to an IgE-dependent stimulus.
Moqbel
R
R
Walsh
G M
GM
Macdonald
A J
AJ
Kay
B
B
D000707:Anaphylaxis / Q000209:etiology; D000888:Antibodies, Anti-Idiotypic / Q000008:administration & dosage* / Q000276:immunology; D002478:Cells, Cultured; D003179:Complement C3b / Q000276:immunology; D004205:Cromolyn Sodium / Q000494:pharmacology*; D003602:Cytotoxicity, Immunologic / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004306:Dose-Response Relationship, Immunologic; D004804:Eosinophils / Q000187:drug effects / Q000276:immunology*; D006098:Granulocytes / Q000187:drug effects; D006636:Histamine Release / Q000187:drug effects; D006801:Humans; D007073:Immunoglobulin E / Q000008:administration & dosage / Q000276:immunology*; D009504:Neutrophils / Q000187:drug effects / Q000276:immunology*; D012397:Rosette Formation
D000888:Antibodies, Anti-Idiotypic; C026408:anti-IgE antibodies; D007073:Immunoglobulin E; D003179:Complement C3b; D004205:Cromolyn Sodium