EXPERIMENTAL DEPRESSION-MODULATED ACTIVATION PATTERN OF THE HYPOTHALAMIC-PITUITARY-ADRENAL AXIS

Author:

,RAZLAN N.A.D.,KAPITONOVA M., ,ALYAUTDIN R.N., , ,TALIP S.B., ,RAMLI N., ,NWE T.M.,

Abstract

Objective: To study the effect of modelled depression not associated with stress on the hypothalamic-pituitary-adrenal system (HPAS) in mice. Methods: The experiment was conducted on the twenty-four C57BL/6 mice weighing 20-25 g, divided into two groups: an experimental one, involving animals with reserpine-induced depression, and a control one, the animals of which were administered normal saline instead of reserpine solution. At the end of the experiment, behavioral tests were performed (open field, sucrose preference, forced swimming), and the corticosterone concentration in blood was measured using ELISA. Image analysis of histological changes in the adrenal gland and thymus was performed. All results were statistically processed using SPSS 27.0.1 software, with p<0.05 indicating the significance of differences. Results: Animals of the experimental group showed a significantly higher level of corticosterone in the blood (p<0.01), significant changes in behavior in the open field test (distance traveled, rearing, frequency of urination and defecation, p<0.01), reduced sucrose preference (p<0.01) and shortened duration of the active phase in the forced swimming test (p<0.01) than the animals of the control group. Besides, in the mice of the experimental group, a significant increase in the volume density of the zona fasciculata of the adrenal cortex was found (p<0.05), as well as the area of its spongiocytes and their nuclei (p<0.05). In the thymus of the experimental animals, a significant decrease in the cortex-medulla ratio was noted (p<0.05); and an increase in the volume density of tingible body macrophages (p<0.05) compared to the control group of mice. Conclusion: Modelled depression, not associated with stress, the depth of which was assessed by behavioral tests, caused activation of the HPAS, manifested by increased corticosterone levels, hyperplasia of the zona fasciculata of the adrenal cortex, hypertrophy of its spongiocytes and their nuclei, as well as changes in the thymus, indicating associated immunosuppression. Thus, the study showed that, along with the well-known phenomenon of the development of depression against the background of chronic stress-associated activation of HPAS, there is an inverse mechanism leading to activation of the HPAS during the development of depression not associated with stress, which must be taken into account when developing the new strategies of treating depression. Keywords: Depression, hypothalamic-pituitary-adrenal system, corticosterone, immune system, mice.

Publisher

Avicenna Tajik State Medical University

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3