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Cortisol responses to emotional stress in men: Association with a functional polymorphism in the 5HTR2C gene

机译:皮质醇对男性情绪压力的反应:与5HTR2C基因功能多态性的关联

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摘要

The serotonin 5HTR2C receptor has been shown to mediate HPA axis activation during stress. We hypothesized that a functional polymorphism (rs6318) of the 5HTR2C gene would be associated with HPA axis response to a laboratory stress protocol. The present sample consisted of 41 men (22 African Americans, 19 Caucasians). We found that at rest men with the more active rs6318 Ser23 C allele had similar cortisol values compared to those with the less active Cys23 G allele. During laboratory stress, however, men with the Ser23 C allele exhibited the predicted significantly higher cortisol levels (p< 0.001), as well as larger increases in anger (p= 0.08) and depressive mood (p= 0.006) ratings, compared to the Cys23 G carriers. The increase in cortisol was significantly related to the increases in ratings of anger and depression assessed before and after the emotion induction, and these correlations became nonsignificant when rs6318 genotype was covaried. We conclude that genetic variation in 5HTR2C may be associated with HPA axis activation and stimulated by emotional stress, and also with both psychological and physiological endophenotypes that increase the risk of cardiovascular disease and type-2 diabetes.
机译:血清素5HTR2C受体已显示在压力下介导HPA轴激活。我们假设5HTR2C基因的功能多态性(rs6318)将与对实验室压力协议的HPA轴反应相关。本样本包括41名男性(22名非洲裔美国人,19名白种人)。我们发现,与具有较低活性的Cys23 G等位基因的男性相比,具有较高活性rs6318 Ser23 C等位基因的男性的皮质醇值相似。然而,在实验室压力下,与Ser23 C等位基因相比,男性的皮质醇水平显着提高(p <0.001),愤怒指数(p = 0.08)和抑郁情绪(p = 0.006)升高幅度更大。 Cys23 G载体。皮质醇的增加与情绪诱导前后评估的愤怒和抑郁的等级增加显着相关,并且当rs6318基因型发生共变时,这些相关性变得不显着。我们得出的结论是5HTR2C的遗传变异可能与HPA轴激活和情绪压力刺激有关,也与心理和生理内表型有关,它们增加了患心血管疾病和2型糖尿病的风险。

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