Typological changes in the level of dopamine, cortisol and thyroid hormones in males of Arkhangelsk in the dynamics of year photoperiods

V. N. Zyabisheva, E. Tipisova, A. Elfimova, I. N. Molodovskaya, V. Alikina
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Abstract

The aim of the study was to consider typological photoperiodic changes in the levels of dopamine, cortisol and thyroid hormones in males of Arkhangelsk.Material and methods. The study sample included 20 young euthyroid males aged 25–44 years, permanently residing in Arkhangelsk. To study the influence of the photoperiodic factor on the functioning of the endocrine system, four months were selected, which are distinguished by the clearest contrast of daylight hours: March (increased daylight hours), June (maximum daylight hours), September (reduced daylight hours) and December (minimum daylight hours). The concentration of dopamine was determined in the blood plasma, and the indicators of the thyroid profile and cortisol level were studied in the serum.Results. Analysis of the data obtained revealed two types of reactions from the dopaminergic system and cortisol content during the period of minimal daylight hours. Along with the seasonal dynamics of dopamine, there is a change in the activity of the pituitary-thyroid system.Conclusions. In males, whose dopamine levels increase from September to December, the concentrations of cortisol and thyroid hormones also increase, that is, several stress systems are simultaneously activated – the adrenal medulla and cortex, the thyroid gland. Thus, there is a more pronounced reaction to the appearance of seasonal stress factors, which may be due to the rather successful adaptation of the respondents to the environment and may indicate that respondents with dopamine levels decreasing or not changing from September to December either have reduced reserve capacity of the body, or hormones are more actively spent on metabolic processes.
阿尔汉格尔斯克男性体内多巴胺、皮质醇和甲状腺激素水平在全年光周期动态中的类型变化
研究的目的是考虑阿尔汉格尔斯克男性体内多巴胺、皮质醇和甲状腺激素水平的类型性周期变化。研究样本包括 20 名常住阿尔汉格尔斯克的 25-44 岁甲状腺功能正常的年轻男性。为了研究光周期因素对内分泌系统功能的影响,选择了日照时间对比最明显的四个月份:三月(日照时间增加)、六月(日照时间最多)、九月(日照时间减少)和十二月(日照时间最少)。对血浆中的多巴胺浓度进行了测定,并对血清中的甲状腺概况指标和皮质醇水平进行了研究。对所获数据的分析表明,在日照时间最短期间,多巴胺能系统和皮质醇含量会出现两种反应。随着多巴胺的季节性变化,垂体-甲状腺系统的活动也发生了变化。男性的多巴胺水平在 9 月至 12 月期间会升高,皮质醇和甲状腺激素的浓度也会升高,也就是说,几个应激系统--肾上腺髓质和皮质、甲状腺--同时被激活。因此,受访者对季节性压力因素的反应更为明显,这可能是由于受访者对环境的适应相当成功,也可能表明,多巴胺水平在 9 月至 12 月期间下降或没有变化的受访者,要么是身体储备能力下降,要么是激素更积极地用于新陈代谢过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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