Linked Life Data

8700128

Source:http://linkedlifedata.com/resource/pubmed/id/8700128

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1996-9-3
pubmed:abstractText
We examined the effects of leptin, the product of the obese gene, on synaptic transmission in the arcuate nucleus in rat hypothalamic slices. Both leptin and neuropeptide Y (NPY) reduced the evoked glutamatergic excitatory postsynaptic current in the arcuate nucleus. NPY also depressed the GABAergic inhibitory postsynaptic current, although leptin had no effect. Leptin also decreased the input resistance of arcuate neurons, and this was accompanied by the activation of an outward current at depolarized potentials. Leptin modulated Ca2+ signals in acutely isolated arcuate neurons. In some cells, the intracellular calcium concentration rise produced by 50 mM K+ was decreased, whereas in others it was increased. However, leptin produced no effects on synaptic transmission and little or no effect on Ca2+ signaling in the hypothalamus of Zucker fatty rats that contain mutated leptin receptors. On the other hand, NPY exhibited synaptic modulatory effects in Zucker lean and fatty rats. These data suggest that leptin can produce rapid synaptic modulatory effects in the arcuate nucleus, which may contribute to its effects on food intake.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0026-895X
pubmed:author
pubmed:issnType
Print
pubmed:volume
50
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
230-5
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Leptin, the obese gene product, rapidly modulates synaptic transmission in the hypothalamus.
pubmed:affiliation
Department of Pharmacological and Physiological Sciences, University of Chicago, Illinois 60637, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't