Linked Life Data

16909929

Source:http://linkedlifedata.com/resource/pubmed/id/16909929

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2006-8-16
pubmed:abstractText
We investigated the effects of lipopolysaccharide (LPS) administration on plasma nitrite, nitrotyrosine and 6-keto prostaglandin F1alpha, (PGF1alpha) levels and the related resultant changes in function and histochemistry of aorta in rats. Plasma nitrite and PGF1alpha nitrotyrosine levels were analysed after 5 mg/kg intravenous LPS was administered to rats compared with those in non-treated rats. The distribution of nitrotyrosine in the aorta was studied immunohistochemically. The contractile responses of aortic rings to phenylephrine (PE) from both the LPS-treated and control rats were studied in the organ baths. There were increases in plasma nitrite, PGF1alpha, and nitrotyrosine concentrations of LPS-treated rats compared to non-treated rats. Immunoreactivity of nitrotyrosine residues were detected in the endothelial and smooth muscle cells in LPS-treated but not in control rat aorta. The contractile responses to PE of the LPS-treated rat aortic rings were significantly reduced as compared with those of control rat's. Incubation of the aortic rings from LPS-treated rats with cyclooxygenase inhibitor indomethacine or with a combination of indomethacine and nitric oxide synthase inhibitor N(omega)-nitro-L-arginine methyl ester (L-NAME) increased the contractile responses to the levels observed in control rats suggesting that both prostanoids and particularly nitric oxide (NO) are involved in the reduced contractile responses in LPS-treated rats. These results supported the view that LPS might cause an increment in both NO and PGI2 levels. This increase in the NO and PGI2 levels may be responsible from the reduction in responses of aorta to contractile agents in LPS-treated rats. Increased peroxynitrite formation in LPS-treated rats may lead to nitration of the tyrosil residues of the proteins in the aorta.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
http://linkedlifedata.com/resource/pubmed/chemical/3-nitrotyrosine, http://linkedlifedata.com/resource/pubmed/chemical/Enzyme Inhibitors, http://linkedlifedata.com/resource/pubmed/chemical/Indomethacin, http://linkedlifedata.com/resource/pubmed/chemical/Lipopolysaccharides, http://linkedlifedata.com/resource/pubmed/chemical/NG-Nitroarginine Methyl Ester, http://linkedlifedata.com/resource/pubmed/chemical/Nitric Oxide Synthase, http://linkedlifedata.com/resource/pubmed/chemical/Nitrites, http://linkedlifedata.com/resource/pubmed/chemical/Phenylephrine, http://linkedlifedata.com/resource/pubmed/chemical/Prostaglandins F, http://linkedlifedata.com/resource/pubmed/chemical/Tyrosine, http://linkedlifedata.com/resource/pubmed/chemical/lipopolysaccharide, E coli O55-B5, http://linkedlifedata.com/resource/pubmed/chemical/prostaglandin F1
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
1138-7548
pubmed:author
pubmed:issnType
Print
pubmed:volume
62
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
27-34
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Plasma levels of nitrites, PGF1alpha, and nitrotyrosine in LPS-treated rats: functional and histochemical implications in aorta.
pubmed:affiliation
Dept. of Biochemistry, Medical School, Akdeniz Universitesi, Tip Fakültesi, Biyokimya Anabilim Dahli, 07070 Antalya, Turkey.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't