Linked Life Data

2730280

Source:http://linkedlifedata.com/resource/pubmed/id/2730280

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1989-6-30
pubmed:abstractText
Recently, there has been considerable interest in plasma concentrations of homovanillic acid (HVA) in various psychiatric disorders. Homovanillic acid is a weak organic acid, and its excretion probably resembles that of other organic acids (eg, p-aminohippuric acid) that are actively secreted by the kidney. Alterations in renal plasma flow can affect clearance of organic acids, resulting in changes in plasma concentrations. In our study, concentrations of plasma HVA and urinary HVA (from 24-hour urine collections) were measured in 20 prepubescent boys who received 3 weeks of placebo, dextroamphetamine sulfate, and fenfluramine hydrochloride in a randomized, double-blind, counterbalanced study of the treatment of attention-deficit disorder. Plasma HVA concentrations were significantly lower during fenfluramine treatment than during amphetamine treatment. This difference, however, seemed to be caused by alterations in renal clearance of HVA rather than changes in production. Whole-body production of HVA, as indexed by total urinary HVA excretion, was unaffected by the different treatments, while renal clearance of HVA did differ significantly between amphetamine and fenfluramine treatment. It seems that alterations in renal clearance can affect plasma HVA concentrations, which should be taken into account when plasma HVA is studied.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0003-990X
pubmed:author
pubmed:issnType
Print
pubmed:volume
46
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
558-62
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Effects of renal clearance on plasma concentrations of homovanillic acid. Methodologic cautions.
pubmed:affiliation
Section on Clinical Pharmacology, National Institute of Mental Health, Bethesda, Md. 20892.
pubmed:publicationType
Journal Article, Clinical Trial, Randomized Controlled Trial