Linked Life Data

21146587

Source:http://linkedlifedata.com/resource/pubmed/id/21146587

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2011-1-10
pubmed:abstractText
Although prenatal morphine exposure experimentally induces seizures in rat offspring, underlying mechanisms remain unclear. This study addresses whether prenatal morphine exposure altered subunit compositions of ?-aminobutyric acid receptor subtype A (GABA(A)R) in the hippocampal CA1 area and temporal cortex and increased seizure susceptibility of young rat offspring, at a representative age (postneonatal days 14; P14). Therapeutic efficacy of dextromethorphan (a noncompetitive antagonist of N-methyl-d-aspartate receptors (NMDARs)), in such offspring was also evaluated. From P7 to 14, Sprague-Dawley rat offspring were intraperitoneally (ip) injected a representative dose of dextromethorphan (3mg/kg) twice a day. At P14, some offspring were ip injected pentylenetetrazol to estimate seizure susceptibility, while the others were studied for GABA(A)R subunit (?1, ?2, ?2) expression. Prenatal morphine exposure caused the up-regulated ?1 subunit and down-regulated ?2/?2 subunit expression of GABA(A)R within hippocampus and temporal cortex in rat offspring associated to increase seizure susceptibility. The magnitudes of upregulated ?1 subunit and downregulated ?2 subunit expression in the hippocampus were greater than which in the temporal cortex. The use of dextromethorphan markedly reversed the prenatal morphine-induced alterations, indicating the possible therapeutic actions of dextromethorphan. These results suggest that the altered subunit compositions (?1, ?2, ?2) of GABA(A)R in the hippocampal CA1 area and temporal cortex may contribute, at least in part, to the increased seizure susceptibility of rat offspring subjected to prenatal morphine exposure. More importantly, dextromethorphan may be a promising clinical agent acting against these alterations.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1872-7972
pubmed:author
pubmed:copyrightInfo
Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
1
pubmed:volume
489
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5-9
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Differential alterations of GABA(A) receptor (?1, ?2, ?2 subunit) expression and increased seizure susceptibility in rat offspring from morphine-addicted mothers: beneficial effect of dextromethorphan.
pubmed:affiliation
Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't