Objective： Bupropion is an antidepressant with proven efficacy for smoking cessation, however the response rate is some limited. With this background, the authors investigated the difference of early bupropion response in smoking cessation according to individual genetic polymorphism and temperamental characteristics.
Method： Subjects were 113 Korean male volunteers who were nicotine dependent and wanted to quit smoking. Authors compared 6 candidate genes (DRD₂, DRD₄, dopamine transporter, norepinephrine transporter, serotonin transporter, COMT), and Temperament Character Inventory (TCI) between response group and non-response group after 3 weeks bupropion treatment.
Result： Among 6 candidate genes, DRD₂ homozygotes (A2/A2+A1/A1), COMT H/H genotype and H allele carriers showed high rate of smoking cessation by bupropion. NET-8 GG genotype and G allele carriers showed low rate of smoking cessation by bupropion. Persistence score in TCI was significant between two groups.
Conclusion：DRD₂, COMT, NET-8 genetic polymorphisms and some temperamental characteristics could predict success of smoking cessation by early treatment response of bupropion. (Korean J Psychopharmacol 2006;17(2):219-228)
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