Linked Life Data

2545204

Source:http://linkedlifedata.com/resource/pubmed/id/2545204

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
1989-7-28
pubmed:abstractText
The present study examines the influence of potassium and sodium ions on guanine nucleotide regulation of adenylate cyclase in various brain regions, including the locus coeruleus (LC), dorsal raphe (DR), ventral tegmentum (VT), hippocampus (HP), frontal cortex (FC), substantia nigra (SN), neostriatum (NS) and cerebellum (CB). Guanine nucleotide regulation of adenylate cyclase was highest in the LC, DR and VT and lowest in NS and CB. Sodium and potassium ions were found to stimulate basal or GTP-activated adenylate cyclase in NS and SN, whereas the cations were found to specifically inhibit guanine nucleotide-stimulated enzyme activity in all other brain regions with the exception of CB, where there was no effect. With regard to stimulation of adenylate cyclase, lithium was more potent than sodium which was more potent than potassium in SN and NS. With regard to inhibition of the enzyme, potassium was equipotent to lithium which was greater than sodium in the other brain regions examined. Both stimulatory and inhibitory effects of cations in the different regions were significant (P less than 0.05) at 30 mM and were maximal at 90-120 mM. Sodium ion inhibition of GTP-stimulated adenylate cyclase in LC and DR was partially blocked by pertussis toxin treatment, whereas cation stimulation in NS was not affected by the toxin. The results demonstrate marked region-specific effects of sodium and potassium on adenylate cyclase, which could occur at either G-proteins or the catalytic unit of the enzyme. The possibility that ion fluxes alter G-protein function is discussed.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0006-2952
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
38
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1909-14
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Sodium and potassium regulation of guanine nucleotide-stimulated adenylate cyclase in brain.
pubmed:affiliation
Department of Psychiatry, Yale University School of Medicine, New Haven, CT.
pubmed:publicationType
Journal Article, In Vitro