title: Immunopharmacological actions of the new antiallergic drug butyl 3'-(1H-tetrazol-5-yl)oxanilate. 2nd communication: inhibitory effects on histamine release from rat mast cells and lung fragments.
abstract: The effects of butyl 3'-(1H-tetrazol-5-yl)oxanilate (WP-833), a new antiallergic drug, on its ability to inhibit histamine release from both peritoneal mast cells and lung fragments of rats were investigated. WP-833 inhibited in a dose-dependent fashion immunoglobulin E (IgE)-mediated histamine release from mast cells. Such potent inhibition was observed in glucose-free as well as complete Tyrode's solution but neither in Ca2+-free nor D2O-supplemented Tyrode's solution. In addition, WP-833 significantly increased intracellular cyclic adenosine monophosphate (AMP) levels in purified mast cells. On the other hand, WP-833 inhibited compound 48/80-but not calcium ionophore A23187-induced histamine release from normal mast cells. Also both IgE- and IgG-mediated histamine release from lung fragments were inhibited by WP-833. WP-833 showed non-competitive inhibition of cyclic AMP-dependent phosphodiesterase derived from lung preparations.
mesh_terms: D015105:3',5'-Cyclic-AMP Phosphodiesterases / Q000378:metabolism; D000818:Animals; D001393:Azoles / Q000494:pharmacology*; D000001:Calcimycin / Q000494:pharmacology; D000242:Cyclic AMP / Q000378:metabolism; D004140:Dinitrophenols / Q000276:immunology; D006636:Histamine Release / Q000187:drug effects*; D007073:Immunoglobulin E / Q000276:immunology; D008168:Lung / Q000187:drug effects / Q000276:immunology / Q000378:metabolism*; D008297:Male; D008407:Mast Cells / Q000187:drug effects / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D013777:Tetrazoles / Q000494:pharmacology*; D003189:p-Methoxy-N-methylphenethylamine / Q000494:pharmacology
chemical_list: D001393:Azoles; D004140:Dinitrophenols; D013777:Tetrazoles; C036097:butyl 3-(1H-tetrazol-5-yl)oxanilate; D007073:Immunoglobulin E; D000001:Calcimycin; D003189:p-Methoxy-N-methylphenethylamine; D000242:Cyclic AMP; D015105:3',5'-Cyclic-AMP Phosphodiesterases