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Psychiatry Investig > Volume 15(2); 2018 > Article
Psychiatry Investigation 2018;15(2):200-204.
DOI:    Published online October 17, 2017.
Association of G-Protein β3 Subunit C825T Polymorphism with Seasonal Variations in Mood and Behavior
Yoon-Ju Nam1, Chul-Hyun Cho1,2, Leen Kim1,2, Heon-Jeong Lee1,2,3
1Department of Psychiatry, Korea University College of Medicine, Seoul, Republic of Korea
2Korea University Chronobiology Institute, Seoul, Republic of Korea
3Department of Biomedical Science, Korea University College of Medicine, Seoul, Republic of Korea
Correspondence  Heon-Jeong Lee ,Tel: +82-2-920-5815, Fax: +82-2-929-7679, Email:
Received: September 11, 2017   Accepted: September 21, 2017   Published online: October 17, 2017
Seasonal affective disorder and seasonal changes in mood and behavior are associated with several genes that regulate circadian rhythms. In this study, we investigated the relationship between the C825T polymorphism of the G-protein β3 subunit and seasonal variations in mood and behavior in a young healthy Korean population.
A total of 507 young Korean participants were recruited through a newspaper advertisement, and their seasonality was evaluated by the Korean version of the Seasonal Pattern Assessment Questionnaire to assess the global seasonality score (GSS). We analyzed the CC, CT, and TT genotypes and their association with the GSS score and subscales.
T allele carriers of the GNB3 C825T polymorphism were more likely to score higher on body weight and GSS. In the female group, the T allele carriers obtained significantly high total GSS and its subscale scores for mood, body weight, energy level, and appetite; however, differences in genotypes and allele carriers were also observed in the male participants.
These results suggested that GNB3 C825T polymorphism plays a role in seasonal variations in mood, body weight, energy level, and appetite in a Korean population, particularly in females.
Keywords: Seasonality, GNB3, Seasonal affective disorder, Genetic association


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