Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
17
pubmed:dateCreated
1984-6-27
pubmed:abstractText
C57 BL/6J (C57) mice display a particular pattern of responses following morphine administration, such as a rapid development of tolerance to the pharmacological action of the opiate and an increase in locomotor activity after a single injection of the drug. We have measured met-enkephalin content and the responsiveness of different opiate receptors after repeated administration of morphine and naloxone. Prolonged morphine administration changes neither met-enkephalin levels, nor the density of the opiate receptors in mice brain. In contrast repeated administration of the opiate antagonist naloxone, produced a marked increase in the number of 3H- DHM and 3H- DADLE binding sites in striatum and brainstem without modifying met-enkephalin concentrations. Behavioral studies have indicated that the morphine-induced increase in locomotor activity is enhanced in naloxone pretreated mice, thus suggesting a possible correlation between the behavioral response to morphine in C57 mice and the higher number of opiate receptors in the striatum.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0024-3205
pubmed:author
pubmed:issnType
Print
pubmed:day
23
pubmed:volume
34
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1669-78
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Modulation of opioid system in C57 mice after repeated treatment with morphine and naloxone: biochemical and behavioral correlates.
pubmed:publicationType
Journal Article, Comparative Study