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Korean Journal of Anesthesiology 2008;55(2):139-144.
DOI: https://doi.org/10.4097/kjae.2008.55.2.139   
The influence of GABAAgamma2 genetic polymorphism on the emergence agitation induced by sevoflurane.
Chang Shin Park, Hye Jin Park, Kyung Nam Kim, Hyo Seok Kang, Su Kyung Lee
1Department of Pharmacology, College of Medicine, Inha University, Incheon, Korea.
2Department of Anesthesia and Pain Medicine, College of Medicine, Eulji University, Seoul, Korea. anesthjin@hanmail.com
Abstract
BACKGROUND
Sevoflurane is one of the most popular anesthetics, used in pediatric anesthesia, but emergence agitation is more common with using sevoflurane as compared to that with using the other inhalation anesthetics. Sevoflurane exerts its effect on gamma-aminobutyric acid (GABA) ergic transmission. This study aimed to investigate if genetic variations at the GABRgamma2 (single nucleotide polymorphism [SNP] 211037 C/T, nucleotide position 3145 in intron A/G) on the 5q33 chromosome were associated with the development of emergence agitation when sevoflurane is used.
METHODS
One hundred fourteen, pre-school aged patients who were to undergo tonsillectomy and adenoidectomy were included in this study. Anesthesia was induced with 5 mg/kg of thiopental sodium, 0.02 mg/kg of atropine and 0.1 mg/kg of vecuronium, and this was maintained with 3% sevoflurane and 50% N2O in oxygen. The incidence of emergence agitation and the emergence agitation scores were assessed at 0 min, 10 min, 20 min and 30 min after arriving at the post anesthetic care unit (PACU). Genomic DNA from peripheral leukocytes was isolated using the QIAamp Blood Minikits and the GABRgamma2 genetic polymorphisms were analyzed by performing polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method.
RESULTS
There were no significant differences of the emergence agitation scores among the genotypes in the GABRgamma2- SNP211037 C/T and GABRgamma2-nucleotide position 3145 in intron A/G. There was a trend in which the AA group in the GABRgamma2- nucleotide position 3145 in intron A/G has a lower incidence of emergence agitation compared with the non-AA group, but this was without statistical significance (P = 0.07).
CONCLUSIONS
There is a possibility that the GABR2 genetic polymorphism may affect the development of emergence agitation when sevoflurane is used in pediatric anesthesia.
Key Words: emergence agitation; GABAgamma2 subunit; genetic polymorphism; sevoflurane


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