Linked Life Data

9007850

Source:http://linkedlifedata.com/resource/pubmed/id/9007850

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1997-6-9
pubmed:abstractText
Sex differences in vascular effects of neuropeptide Y (NPY) were investigated in isolated tail artery ring segments from male and female F344 rats. Both pre- and postjunctional effects of NPY appeared to be greater in females. NPY potentiated contractions elicited by transmural adrenergic nerve stimulation (TNS), consistent with an effect on smooth muscle Y1 receptors. The degree of potentiation was significantly greater in arteries from females than males. Ovariectomy of the females resulted in a decrease in potentiation, while orchiectomy of the males resulted in an enhanced NPY effect. When NPY potentiation was measured in the presence of peptidase inhibitors, the effect of exogenous NPY was enhanced; however the enhancement was greater in arteries from females than either males or ovariectomized females. Possible male-female differences in inhibitory prejunctional Y2 receptor function were addressed using the selective agonist NPY13-36. At a low frequency of stimulation (0.5 Hz), NPY13-36 inhibited the response to TNS in arteries from females and castrated males; however, NPY13-36 had no significant effect on responses to TNS in arteries from males or ovariectomized females. Thus gonadal hormones appear to modulate several components involved in NPY neurotransmission, including tissue peptidase activity, postjunctional Y1 and prejunctional Y2 receptors. These effects may contribute to significant differences observed in vascular reactivity between females and males.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0028-1298
pubmed:author
pubmed:issnType
Print
pubmed:volume
355
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
111-8
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Vascular responses to neuropeptide Y are greater in female than male rats.
pubmed:affiliation
Department of Pharmacology, College of Medicine, University of California, Irvine 92697-4625, USA.
pubmed:publicationType
Journal Article, In Vitro, Research Support, U.S. Gov't, P.H.S.