Changes in expression of GABAA alpha4 subunit mRNA in the brain under anesthesia induced by volatile and intravenous anesthetics

We investigated changes in levels of GABAA receptor alpha4 subunit mRNA in the mouse brain after administration of volatile or i.v. anesthetic, by performing quantitative RT-PCR. We also performed immunohistochemical assays for c-fos-like protein. During deep anesthesia (which was estimated by loss...

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Bibliographic Details
Published in:Neurochemical research 2006-03, Vol.31 (3), p.439-448
Main Authors: Sekine, Shusuke, Matsumoto, Shohei, Issiki, Atsushi, Kitamura, Taiko, Yamada, Jinzo, Watanabe, Yasuo
Format: Article
Language:English
Subjects:
Anesthesia
Anesthetics, Inhalation - pharmacology
Anesthetics, Intravenous - pharmacology
Animals
Brain - anatomy & histology
Brain - drug effects
Brain - metabolism
Immunohistochemistry
Male
Mice
Mice, Inbred C57BL
Proto-Oncogene Proteins c-fos - metabolism
Receptors, GABA-A - biosynthesis
Receptors, GABA-A - genetics
Reverse Transcriptase Polymerase Chain Reaction
RNA, Messenger - biosynthesis
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Summary:We investigated changes in levels of GABAA receptor alpha4 subunit mRNA in the mouse brain after administration of volatile or i.v. anesthetic, by performing quantitative RT-PCR. We also performed immunohistochemical assays for c-fos-like protein. During deep anesthesia (which was estimated by loss of righting reflex) after administration of propofol, levels of GABAA receptor alpha4 subunit mRNA in the hippocampus, striatum and diencephalons were significantly greater than those observed after administration of pentobarbital, midazolam or GOI (5.0% isoflurane and 70% nitrous oxide in oxygen). Under incomplete anesthesia, levels of GABAA receptor alpha4 subunit mRNA were significantly increased by midazolam in all brain regions, and were significantly increased by pentobarbital in the posterior cortex and striatum. Expression of GABAA receptor alpha4 subunit mRNA closely correlated with expression of c-fos-like protein. These results indicate that the GABAA receptor alpha4 subunit plays an important role in regulating the anesthetic stage of i.v. anesthetics.
ISSN:0364-3190
1573-6903