Linked Life Data

12606509

Source:http://linkedlifedata.com/resource/pubmed/id/12606509

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2003-2-27
pubmed:abstractText
The distribution of fat in the body differs between the male and female sexes and is associated with the relative secretion of the two "adiposity" hormones leptin and insulin. We now report that the brains of male and female rats are differentially sensitive to the catabolic actions of small doses of these two hormones. Leptin (1 or 3.5 microg/2 microl) or saline (2 microl) was administered into the third cerebral ventricle of age- and weight-matched male and female rats. Leptin significantly reduced food intake in female and male rats over 4 h; however, leptin reduced 24-h intake in female but not in male rats. When the same rats were administered insulin (1 or 4 mU/2 microl) or saline (2 microl), male but not female rats had a robust reduction in food intake over 24 h. Previous research demonstrates the melanocortins are a central mediator of the effects of both leptin and insulin. However, we found no sex differences in sensitivity to the melanocortin agonist MTII (0.01, 0.1, 0.3, and 1.0 nmol/2 microl). These results suggest that the sex differences in sensitivity to leptin and insulin at the doses that we injected occur upstream of the melanocortin receptors. Because insulin and leptin reflect different fat beds and are differentially distributed in the male and female sexes, the implication is that the male and female sexes regulate adiposity-relevant parameters differently.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0012-1797
pubmed:author
pubmed:issnType
Print
pubmed:volume
52
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
682-7
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Differential sensitivity to central leptin and insulin in male and female rats.
pubmed:affiliation
Department of Psychiatry, University of Cincinnati Medical Center, Cincinnati, OH 45267-0559, USA.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't