Linked Life Data

12075463

Source:http://linkedlifedata.com/resource/pubmed/id/12075463

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2002-6-20
pubmed:abstractText
Effects of serotonin (5-HT) on spontaneous discharges of single hypothalamic arcuate neurons were observed in rat brain slices by extracellular recordings. The results showed that (1) of 149 neurons selected randomly and tested for 5-HT application, 33 (22.2%) were excited, 82 (55.0%) were inhibited, and 34 (22.8%) showed biphasic responses or failed to respond; (2) substitution of low Ca(2+)-high Mg(2+) artificial cerebrospinal fluid (aCSF) for normal aCSF abolished the 5-HT-induced inhibitory effect but failed to affect the 5-HT-induced excitatory effect; (3) cyproheptadine, a non-selective 5-HT receptor antagonist, could block either the 5-HT-induced excitatory or inhibitory effects in all neurons tested; and (4) bicuculline, a GABA(A)-receptor antagonist, blocked the 5-HT-induced inhibitory effect. These results imply (1) 5-HT excites arcuate neurons through a mechanism that is insensitive to the decreased extracellular Ca(2+), suggesting a direct postsynaptic action of 5-HT on the 5-HT-receptors located in the membrane of the neurons recorded; and (2) 5-HT might elicit the inhibitory effect through a Ca(2+)-sensitive release of GABA from intercalated GABAergic local neurons that are excited first by 5-HT.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0371-0874
pubmed:author
pubmed:issnType
Print
pubmed:day
25
pubmed:volume
54
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
189-95
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Serotonin excites arcuate neurons directly but inhibits them through intercalated GABAergic neurons.
pubmed:affiliation
Department of Neurobiology, Shanxi Medical University, Taiyuan, 030001, China. qiaojt@public.ty.sx.cn
pubmed:publicationType
Journal Article, In Vitro