Linked Life Data

11270139

Source:http://linkedlifedata.com/resource/pubmed/id/11270139

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2001-3-28
pubmed:abstractText
The potential interaction between the immune system and the autonomic nervous system was examined in the cardiac ganglia of guinea pigs. Intracellular voltage recordings were used to determine the effects of mast cell degranulation on the membrane properties of parasympathetic neurons in animals actively sensitized to ovalbumin. Stimulation of mast cell degranulation by perfusion with ovalbumin (10 micrograms/ml) produced a depolarization and increase in the excitability of intracardiac neurons. These effects could be mimicked by histamine application, either by perfusion (10 microM) or by local pressure application (100 microM, 1-2 s application). In either case, histamine application resulted in a similar membrane depolarization and increase in excitability. Immunohistochemical experiments demonstrated that histamine-immunoreactive mast cells are located in close proximity to parasympathetic postganglionic neurons. The histamine response was not due to release of other neurotransmitters from adjacent nerve terminals and both the depolarization and increase in excitability were inhibited by the H1 antagonist, pyrilamine (300 nM), and were unaffected by the H2 antagonist cimetidine (5 microM). Incubation of cardiac ganglion preparations from sensitized animals with pyrilamine prior to ovalbumin perfusion resulted in the inhibition of both the depolarization and increase in excitability. These results demonstrate that mast cell degranulation, and the subsequent release of histamine, results in the stimulation of intracardiac neurons via the activation of H1 receptors. Thus, local inflammatory reactions in the cardiac tissue can lead to the rapid activation of parasympathetic neurons, thereby altering cardiac function.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1566-0702
pubmed:author
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
87
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
37-45
pubmed:dateRevised
2009-8-12
pubmed:meshHeading
pubmed-meshheading:11270139-Action Potentials, pubmed-meshheading:11270139-Animals, pubmed-meshheading:11270139-Cimetidine, pubmed-meshheading:11270139-Female, pubmed-meshheading:11270139-Ganglia, Parasympathetic, pubmed-meshheading:11270139-Guinea Pigs, pubmed-meshheading:11270139-Heart, pubmed-meshheading:11270139-Histamine, pubmed-meshheading:11270139-Histamine H1 Antagonists, pubmed-meshheading:11270139-Histamine H2 Antagonists, pubmed-meshheading:11270139-Immunohistochemistry, pubmed-meshheading:11270139-Male, pubmed-meshheading:11270139-Mast Cells, pubmed-meshheading:11270139-Microtubule-Associated Proteins, pubmed-meshheading:11270139-Neurons, pubmed-meshheading:11270139-Ovalbumin, pubmed-meshheading:11270139-Pyrilamine, pubmed-meshheading:11270139-Receptors, Histamine, pubmed-meshheading:11270139-Vagus Nerve
pubmed:year
2001
pubmed:articleTitle
Regulation of parasympathetic neurons by mast cells and histamine in the guinea pig heart.
pubmed:affiliation
Department of Biology, Ithaca College, Ithaca, NY 14850, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.