Linked Life Data

9518635

Source:http://linkedlifedata.com/resource/pubmed/id/9518635

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1998-7-10
pubmed:abstractText
The mechanism of adenosine-induced inhibition of ganglionic transmission was investigated in the isolated superior cervical ganglion (SCG) of the rat. The inhibitory effect of adenosine on the postganglionic compound action potential (CAP) was antagonized by pretreatment of ganglia with forskolin, isoproterenol (IPNE), arginine vasopressin (AVP), or papaverine, all of which are known to increase tissue cAMP level by different mechanisms. Furthermore, pretreatment of ganglia with the adenylate cyclase inhibitor SQ 22, 536, or the phosphodiesterase activator imidazole reversed the effects of IPNE and forskolin. Pretreatment with 8-bromo-cAMP, resulted in a marked antagonism of the adenosine-induced inhibition. By themselves, none of these drugs had any significant effect on the CAP. Adenosine slightly but significantly decreased the basal level of cAMP in untreated ganglia. Formation of cAMP induced by IPNE was markedly reduced by adenosine. This was largely reversed in the presence of the adenosine A1 receptor antagonist 8-cyclopentyl-1, 3-dipropylxanthine (DPCPX) but not the A2 receptor antagonist 3, 7-dimethyl-1-propargylxanthine (DPMX). We conclude that the inhibition of ganglionic transmission by adenosine involves reduction of cAMP formation through activation of A1 receptors.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0006-8993
pubmed:author
pubmed:copyrightInfo
Copyright 1998 Elsevier Science B.V.
pubmed:issnType
Print
pubmed:day
23
pubmed:volume
787
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
242-7
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Cyclic AMP antagonizes adenosine-induced inhibition of ganglionic transmission.
pubmed:affiliation
Department of Biology, Texas Southern University, Houston, TX 77004, USA.
pubmed:publicationType
Journal Article, In Vitro, Research Support, U.S. Gov't, P.H.S.