Abstract
General anesthesia, at a minimum, provides amnesia and unresponsiveness. Although anesthetics have many modulatory effects on neuronal ionophore protein complexes, it is not clear that the resulting electrophysiologic changes are the sole mechanisms of clinical anesthetic action. Cells respond to environmental changes in several ways, including alterations in DNA transcription leading to changes in the cell's proteins. We sought to expose the changes in global genomic expression, seeking potential targets involved in the processes of anesthetic-induced amnesia, and persistent long-term side effects of general anesthesia, including nausea and postoperative cognitive decline. Using Affymetrix GeneChips, we surveyed changes in expression across the entire expressed genome of Sprague-Dawley rat (n = 10 baseline, n = 6 isoflurane) basolateral amygdala 6 h after exposure to 15 min of 2% (1.4 MAC) isoflurane. Isoflurane administration was associated with altered expression in 269 unique genes possessing functional annotation. Affected genes were related to DNA transcription, protein synthesis, metabolism, signaling cascades, cytoskeletal structural proteins, and neural-specific proteins, among others. Even brief exposure to isoflurane...Continue Reading
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