Immunological regulation of synaptic transmission in isolated guinea pig autonomic ganglia

D. Weinreich, B. J. Undem

Research output: Contribution to journalArticle

Abstract

We have attempted to identify a role for mast cells in autonomic ganglia by examining the effects of antigen challenge on mast cell-associated mediator release and synaptic transmission through the superior cervical ganglion isolated from ovalbumin-sensitized guinea pigs. Ovalbumin induced the release of 7.9 ng of histamine, 40 pg of immunoreactive sulfidopeptide-leukotriene, and 140 pg of immunoreactive-PgD2 per ganglion. Ovalbumin produced long-lasting potentiation (51 ± 4%, mean ± SEM, n = 66) of synaptic transmission, the protracted nature of which could not be mimicked by exogenous histamine (10-5 M). Selective histamine H1 antagonists inhibited the antigen-induced potentiation, but did not reverse it when added any time after antigen exposure. These results indicate that immunologic activation of mast cells can directly potentiate neurotransmission in sympathetic ganglia. Histamine appears to be a mediator involved in the induction of antigen-induced potentiation of synaptic transmission, but alone cannot account for the long term nature of this phenomenon.

Original languageEnglish (US)
Pages (from-to)1529-1532
Number of pages4
JournalJournal of Clinical Investigation
Volume79
Issue number5
DOIs
StatePublished - Jan 1 1987
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)

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