Linked Life Data

2077520

Source:http://linkedlifedata.com/resource/pubmed/id/2077520

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1991-4-25
pubmed:abstractText
Three experiments were performed to study the subchronic effects of treatment with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP, 2 x 40 mg/kg subcutaneously two weeks before testing) in C57 BL/6 mice upon spontaneous motor activity and the reversal of the long-term behavioural changes by acute treatment with L-Dopa. Mice treated with MPTP showed a drastic reduction of striatal dopamine levels (-88%) associated with reductions of all three parameters of spontaneous motor activity, i.e. locomotion, rearing and total activity, during both the initial, exploratory, stage (first 90 min), and later stages of the 3- or 4-hr test periods. L-Dopa (5-80 mg/kg subcutaneously) injected 60 min. after the start of testing dose-dependently improved all three parameters studied in MPTP treated mice with 10 mg/kg being the lowest dose causing a significant effect, while doses above 20 mg/kg caused hyperactivity. During the initial period, rearing activity in MPTP mice was to a variable degree suppressed by the L-Dopa treatment (20-80 mg/kg); these reductions were followed by enormous increases in motor activity by the 40 mg/kg (locomotion) and 80 mg/kg (total activity) L-Dopa groups. Both the degree and duration of the L-Dopa-induced hypoactivity for locomotor behaviour increased dose-dependently in control mice. No suppressive effects of L-Dopa were obtained for total activity in control mice, although the 80 mg/kg L-Dopa doses evoked hyperactivity for up to 90 min. following treatment for both locomotion and total activity.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0901-9928
pubmed:author
pubmed:issnType
Print
pubmed:volume
67
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
295-301
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
MPTP-induced hypoactivity in mice: reversal by L-dopa.
pubmed:affiliation
Department of Psychiatry, Uppsala University, Sweden.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't