Linked Life Data

2774496

Source:http://linkedlifedata.com/resource/pubmed/id/2774496

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1989-10-12
pubmed:abstractText
Abnormal involuntary movements complicate the management of a majority of patients with advanced Parkinson's disease. The ability of levodopa to induce dyskinesias and alleviate parkinsonism has generally been considered a continuous dose-dependent pharmacological spectrum. In this study, the acute dose-response profile of intravenously administered levodopa for both inducing dyskinesia and alleviating parkinsonism, and its duration of action on these motor manifestations were evaluated in 52 parkinsonian patients. The minimum dose of levodopa required to produce mild dyskinetic movements was significantly lower in patients with fluctuations in motor response compared with those who had a stable response to standard oral therapy; the minimum dose for antiparkinsonian benefit, however, failed to show significant differences. The rate of disappearance of dyskinetic movements was faster than the rate of reappearance of parkinsonian signs following withdrawal of a steady-state infusion of levodopa. The dissociation of the pharmacodynamic profile of the two major motor effects of levodopa suggests their mediation through two different central pharmacological mechanisms, perhaps involving the two classes of dopamine receptors or other transmitter systems, and could have important implications for the design of future antiparkinsonian agents.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0364-5134
pubmed:author
pubmed:issnType
Print
pubmed:volume
25
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
523-6
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Pathogenesis of dyskinesias in Parkinson's disease.
pubmed:affiliation
Experimental Therapeutics Branch, National Institute of Neurological and Communicative Disorders and Stroke, Bethesda, MD 20892.
pubmed:publicationType
Journal Article