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曹衍淼; 王美萍;曹 丛 ;纪林芹; 张文新
(山东师范大学心理学院, 济南 250014)
The interaction between dopamine D2 receptor gene TaqIA polymorphim and peer victimization on early adolescent depression
CAO Yanmiao; WANG Meiping; CAO Cong; JI Linqin; ZHANG Wenxin
(School of Psychology, Shandong Normal University, Jinan 250014, China)
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本研究运用问卷法与DNA分型技术, 对1063名青少年(初次测评年龄为12.32 ± 0.47岁, 50.3%女生)进行间隔2年的追踪调查, 考察DRD2基因TaqIA多态性与同伴身体侵害和关系侵害对青少年早期抑郁的交互作用及其性别差异。结果发现, TaqIA多态性与身体侵害、关系侵害均对男青少年抑郁存在显著的交互作用。在携带A2A2基因型的男生中, 身体侵害和关系侵害可以显著正向预测其抑郁水平, 而在携带A1等位基因的男生中, 同伴侵害对抑郁无预测作用。此外, TaqIA多态性与身体侵害、关系侵害对女生抑郁均无显著交互作用。研究结果提示, 同伴侵害是一种重要的候选环境指标, 与TaqIA多态性交互影响青少年早期抑郁, 并且性别在这一基因×环境交互作用中起到重要的调节效应。

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关键词 DRD2基因TaqIA多态性 同伴侵害 抑郁 性别差异    

The majority of studies on the gene by environment interaction have focused on family factors and stressful life events as environments, while research including peer contexts as environmental factors is rare. However, whether and how peer environments interact with gene on adolescent depression are less well understood, especially during early adolescence, a crucial period for examining the role of peer experiences in psychosocial adjustment. Peer victimization experience may result in negative self-evaluations, and in turn lead to anxiety and depression. However, the genetic makeup involved in the dopaminergic pathway could determine the degree to which a person is influenced by the peer environment. In this study, one of the most widely studied functional polymorphism (TaqIA) in the dopamine receptor D2 (DRD2) gene was used to test whether DRD2 gene moderates the effect of peer victimization on depression. Despite the extensive evidence supporting DRD2 by environment interaction on depression, the actual patterns of gender differences observed are inconsistent across studies. It also remains unknown whether gender moderates the way that TaqIA polymorphism interacts with peer environments. One thousand and sixty three adolescents of grade 6 (mean age 12.32 ± 0.49 years old at the first time point) from 40 classes of 14 primary schools in Jinan were assessed twice with an interval of two years. During each assessment, the participants completed self-reported questionnaires on experience of peer victimization and on depressive symptoms. All measures showed good reliability. DNA was extracted from saliva. Genotyping at TaqIA polymorphism in the DRD2 gene was performed for each participant in real time with MassARRAY RT software version and analyzed using the MassARRAY Typer software version 3.4 (Sequenom). To examine whether TaqIA polymorphism moderates the effects of peer victimizations on adolescent depressive symptoms and whether this potential moderating effect differs between boys and girls, hierarchical regression analyses were conducted on males and females separately. Scores on physical and relational victimization and depressive symptoms were square-root transformed to eliminate skew before analysis. We also tested above questions by recoding peer victimizations into categorical variables (individuals had never experienced any victimization vs. individuals had experienced victimization) and conducted ANOVA analyses within each gender. The findings indicated that the two forms of victimization (physical and relational victimization) had no main effect on later depressive symptoms after controlling for social economic status and previous depressive symptoms. No main effect of DRD2 on depressive symptoms was found. The TaqIA polymorphism interacted with both forms of peer victimization in predicting male adolescent depression at age 14. Specifically, male adolescents with A2A2 genotype exhibited higher levels of depression when encountered with peer physical and relational victimization, compared to their counterparts with at least one A1 allele. However, such an interactive effect was not observed among females. In addition, the results of analyses of ANOVA replicated the associations among TaqIA polymorphism, peer victimizations and early adolescent depressive symptoms. These findings highlight the importance of investigating the moderating effect of peer context in the association between gene and depressive symptoms, especially during early adolescence. Besides, the associations among TaqIA genotype, peer physical and relational victimization and depressive symptoms in community populations differ substantially by gender.

Key wordsDRD2 gene TaqIA polymorphism    peer victimization    depression    gender difference
收稿日期: 2016-04-11      出版日期: 2017-01-25

国家自然科学基金项目(31271105、31671156)、高等学校博士学科点专项科研基金项目(博导类 20133704110001)。

通讯作者: 张文新, E-mail:   
曹衍淼;王美萍;曹丛;纪林芹;张文新. DRD2基因TaqIA多态性与同伴侵害对青少年早期抑郁的交互作用[J]. 心理学报, 10.3724/SP.J.1041.2017.00028.
CAO Yanmiao; WANG Meiping; CAO Cong; JI Linqin; ZHANG Wenxin. The interaction between dopamine D2 receptor gene TaqIA polymorphim and peer victimization on early adolescent depression. Acta Psychologica Sinica, 2017, 49(1): 28-39.
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