Regulation of histamine release from human basophil leucocytes: Role of H1, H2 and H3 receptors

A. Tedeschi, M. Lorini, M. Arquati, A. Miadonna

Research output: Contribution to journalArticlepeer-review

Abstract

A novel class of histamine receptors (H3), controlling histamine synthesis and release, was described in rat and human brain and peripheral nerve endings. The present study was undertaken to evaluate whether H3 receptors contribute to the regulation of histamine release from human basophils. Basophil leucocytes were incubated with a H3 antagonist (thioperamide; concentrations ranging from 1 nM to 10 μM) or with a H3 agonist ((R)αmethyl-histamine; concentrations ranging from 1 to 100 nM), and subsequently were stimulated with optimal doses of anti-IgE and formyl-methionyl-leucyl-phenyl-alanine (f-met peptide). No significant modifications of histamine release were observed after incubation either with the H3 agonist or with the H3 antagonist. By contrast, a H2 antagonist (cimetidine; concentrations ranging from 1 to 100 μM) exerted a dose-dependent enhancing effect on anti-IgE- and, to a lesser extent, on f-met peptide-induced histamine release. A H1 antihistamine (chlorpheniramine; concentrations ranging from 100 nM to 1 μM), at the highest concentration employed, displayed an inhibitory activity on IgE-dependent and IgE-independent histamine release. Exogenous histamine was shown to exert a dose-dependent inhibitory effect on two-staged anti-IgE-induced histamine release. Taken as a whole, these results suggest that H3 receptors are not involved in the regulation of histamine release from human basophils; by contrast, H2 receptors participate in controlling histamine release from human basophils, as previously demonstrated by other authors.

Original languageEnglish
Pages (from-to)626-631
Number of pages6
JournalAllergy: European Journal of Allergy and Clinical Immunology
Volume46
Issue number8
Publication statusPublished - 1991

Keywords

  • basophil leucocytes
  • histamine receptors
  • histamine release

ASJC Scopus subject areas

  • Immunology

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