Linked Life Data

9239755

Source:http://linkedlifedata.com/resource/pubmed/id/9239755

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
1997-10-22
pubmed:abstractText
Formation of nitric oxide, and endothelium-derived relaxing factor, can be inhibited by administration of N-nitro-L-arginine methylesther (L-NAME). In the present study, the activity of the sympathoadrenal system in rats with blood pressure (BP) elevation induced by L-NAME was investigated. L-NAME was administered in a dose of 50 mg/kg, i.p. every 12 h for 4 days. Blood samples were collected via chronically inserted arterial catheters in conscious, freely moving rats at rest and during immobilization stress. Plasma epinephrine (EPI), norepinephrine (NE), and dopamine (DA), as well as catecholamine metabolites dihydroxyphenylglycol (DHPG) and dihydroxyphenylacetic acid (DOPAC) were measured by HPLC method. In L-NAME treated animals, which slowed a significant increase in BP, plasma EPI levels were markedly elevated both before and during stress. Plasma NE levels were not significantly increased, however, DHPG levels, which indicate NE turnover and reuptake, were highly elevated. Plasma DA levels were not changed after L-NAME administration but DA metabolite DOPAC showed a significant elevation both under basal conditions and during stress. Thus, the present results indicate that the prolonged blockade of nitric oxide synthesis that causes arterial hypertension is associated with an activation of the sympathoadrenal system.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0364-3190
pubmed:author
pubmed:issnType
Print
pubmed:volume
22
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
995-1001
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Chronic blockade of nitric oxide synthesis elevates plasma levels of catecholamines and their metabolites at rest and during stress in rats.
pubmed:affiliation
Institute of Experimental Endocrinology, Slovak Academy of Sciences, Bratislava, Slovak Republic. kvet@uee.savba.sk
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't