Linked Life Data

11408389

Source:http://linkedlifedata.com/resource/pubmed/id/11408389

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2001-6-15
pubmed:abstractText
Studies have indicated a complex functional interaction between angiotensin (Ang) II and NO in the heart. The purpose of the present study was to examine the protein expression and tissue distribution of NO synthases 1 (NOS1) and 3 (NOS3) in the myocardium of rats that underwent continuous infusion of Ang II at 2 different rates (10 and 40 ng. kg(-1). min(-1)) for 6 days. Mean arterial pressure increased by approximately 15 mm Hg in rats infused with Ang II at 40 ng. kg(-1). min(-1), but it remained close to the values observed in saline-infused rats ( approximately 110 mm Hg) when Ang II was infused at 10 ng. kg(-1). min(-1). The protein expression of a 160-kDa NOS1 and a 135-kDa NOS3 were found to increase ( approximately 200%) in the myocardium of rats infused with both subpressor and pressor doses of Ang II. Immunohistochemistry studies showed that NOS1 and NOS3 are differentially expressed in myocardial cells. NOS1 was detected in cardiac myocytes and in smooth muscle cells of small and large coronary arteries, whereas NOS3 was detected in the endothelium and in perivascular and interstitial tissues, but NOS3 was not detected in cardiac or smooth muscle cells. Ang II infusion enhanced the tissue immunoreactivity of both isoforms in their specific locations but did not change the distribution throughout the myocardium. Myocardium staining with anti-angiotensin type 1 (AT(1)) receptor antibody indicated that AT(1) receptor is expressed in cardiac myocytes, coronary smooth muscle cells, and interstitial and perivascular tissues. Ang II infusion did not change the protein expression and distribution of AT(1) receptor in the myocardium. These results indicate that long-term increases in the circulating levels of Ang II modulate the protein expression of NOS1 and NOS3 and, consequently, the function of the local myocardial NO system.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1524-4563
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
37
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1423-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:11408389-Angiotensin II, pubmed-meshheading:11408389-Animals, pubmed-meshheading:11408389-Blood Pressure, pubmed-meshheading:11408389-Coronary Vessels, pubmed-meshheading:11408389-Endothelium, Vascular, pubmed-meshheading:11408389-Heart Ventricles, pubmed-meshheading:11408389-Infusions, Intravenous, pubmed-meshheading:11408389-Male, pubmed-meshheading:11408389-Muscle, Smooth, Vascular, pubmed-meshheading:11408389-Myocardium, pubmed-meshheading:11408389-Nitric Oxide Synthase, pubmed-meshheading:11408389-Nitric Oxide Synthase Type I, pubmed-meshheading:11408389-Nitric Oxide Synthase Type III, pubmed-meshheading:11408389-Rats, pubmed-meshheading:11408389-Rats, Wistar, pubmed-meshheading:11408389-Receptor, Angiotensin, Type 1, pubmed-meshheading:11408389-Receptor, Angiotensin, Type 2, pubmed-meshheading:11408389-Receptors, Angiotensin, pubmed-meshheading:11408389-Vasoconstrictor Agents
pubmed:year
2001
pubmed:articleTitle
Expression and distribution of NOS1 and NOS3 in the myocardium of angiotensin II-infused rats.
pubmed:affiliation
Department of Internal Medicine, School of Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't