Abstract:
BACKGROUND:β3 containing γ-aminobutyric acid type A receptors (GABA(A)-Rs) mediate behavioral end points of IV anesthetics such as immobility and hypnosis. A knockout mouse with targeted forebrain deletion of the β3 subunit of the GABA(A)-R shows reduced sensitivity to the hypnotic effect of etomidate, as measured by the loss of righting reflex. The end points of amnesia and immobility produced by an inhaled anesthetic have yet to be evaluated in this conditional knockout. METHODS:We assessed forebrain selective β3 conditional knockout mice and their littermate controls for conditional fear to evaluate amnesia and MAC, the minimum alveolar concentration of inhaled anesthetic necessary to produce immobility in response to noxious stimulation, to assess immobility. Suppression of conditional fear was assessed for etomidate and isoflurane, and MAC was assessed for isoflurane. RESULTS:Etomidate equally suppressed conditional fear for both genotypes. The knockout showed resistance to the suppression of conditional fear produced by isoflurane in comparison with control littermates. Controls and knockouts did not differ in isoflurane MAC values. CONCLUSIONS:These results suggest that β3 containing GABA(A)-Rs in the forebrain contribute to hippocampal-dependent memory suppressed by isoflurane, but not etomidate.
journal_name
Anesth Analgjournal_title
Anesthesia and analgesiaauthors
Rau V,Oh I,Liao M,Bodarky C,Fanselow MS,Homanics GE,Sonner JM,Eger EI 2nddoi
10.1213/ANE.0b013e3182273affsubject
Has Abstractpub_date
2011-09-01 00:00:00pages
500-4issue
3eissn
0003-2999issn
1526-7598pii
ANE.0b013e3182273affjournal_volume
113pub_type
杂志文章abstract:BACKGROUND:Postoperative delirium is a major debilitating complication for patients and is associated with poor outcomes. Previous studies have suggested that excessive general anesthesia may lead to postoperative delirium. Electroencephalography (EEG)-based monitors have been administered in clinical practice in an at...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,meta分析
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journal_title:Anesthesia and analgesia
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journal_title:Anesthesia and analgesia
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journal_title:Anesthesia and analgesia
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journal_title:Anesthesia and analgesia
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journal_title:Anesthesia and analgesia
pub_type: 杂志文章
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