Abstract
Two selective H2-histamine agonists, dimaprit and impromidine, have been tested for their action on histamine release from human basophils and rat mast cells.
IgE-mediated basophil histamine release was inhibited by stimulation of histamine H2-receptors. However, differences between the actions of both dimaprit and impromidine were noticed. Both impromidine and dimaprit had no specific effect on 48/80-induced histamine release from rat mast cells, although the latter in higher concentrations either slightly increased spontaneous histamine release or non-specifically inhibited compound 48/80-induced release.
The results are consistent with the view that activation of adenylate cyclase via H2-histamine receptors might be an important regulatory mechanism of histamine release from human basophils but not from rat mast cells.
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Kazimierczak, W., Szczepaniak, K. & Bańkowska, K. A modulation of the anaphylactic basophil histamine release by selective H2 histamine agonists. Agents and Actions 11, 96–98 (1981). https://doi.org/10.1007/BF01991468
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DOI: https://doi.org/10.1007/BF01991468