Linked Life Data

16428542

Source:http://linkedlifedata.com/resource/pubmed/id/16428542

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2006-1-23
pubmed:abstractText
We performed the current study in mice lacking individual alpha2-adrenoceptor subtypes to elucidate the contribution of alpha(2)-adrenoceptor subtypes to the neuroprotective properties of dexmedetomidine in a model of perinatal excitotoxic brain injury. On postnatal Day 5, wild-type mice and mice lacking alpha2A-adrenoceptor (alpha2A-KO) or alpha2C-adrenoceptor subtypes (alpha2C-KO) were randomly assigned to receive dexmedetomidine (3 microg/kg) or phosphate-buffered saline intraperitoneally. Thirty minutes after the intraperitoneal injection, the glutamatergic agonist ibotenate (10 microg) was intracerebrally injected, producing transcortical necrosis and white matter lesions that mimic perinatal human hypoxic-like lesions. Quantification of the lesions was performed on postnatal Day 10 by histopathologic examination. Dexmedetomidine reduced mean lesion size in the cortex of wild-type mice and alpha2C-KO mice by 44% and 49%, respectively. Ibotenate-induced white matter lesions were reduced by 71% (wild-type mice) and 75% (alpha2C-KO mice) after pretreatment with dexmedetomidine. In contrast, in alpha2A-KO mice, dexmedetomidine did not protect against the cortical excitotoxic insult, and white matter lesions were even more pronounced (82% increase of mean lesion size). Dexmedetomidine provides potent neuroprotection in a model of perinatal excitotoxic brain damage. This effect was completely abolished in alpha2A-KO mice, suggesting that the neuroprotective effect is mediated via the alpha2A-adrenoceptor subtype.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1526-7598
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
102
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
456-61
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
The effects of dexmedetomidine on perinatal excitotoxic brain injury are mediated by the alpha2A-adrenoceptor subtype.
pubmed:affiliation
Department of Anaesthesiology and Intensive Care Medicine, University Hospital Schleswig-Holstein, Campus Kiel, Germany. paris@anaesthesie.uni-kiel.de
pubmed:publicationType
Journal Article