Effect of combined chronic predictable and unpredictable stress on depression-like symptoms in mice

NWIPB OpenIR

	Effect of combined chronic predictable and unpredictable stress on depression-like symptoms in mice
	Qiao, Yajun; Zhao, Jiubo; Li, Cen; Zhang, Ming; Wei, Lixin; Zhang, Xiaoyuan; Kurskaya, Olga; Bi, Hongtao; Gao, Tingting
	2020
发表期刊	ANNALS OF TRANSLATIONAL MEDICINE
卷号	8 期号:15
摘要	Background: Mental stress mainly induces depression, and predictable stress, as well as a constant bombardment of chronic unpredictable micro-stressors, always coexist in daily life. However, the combined effect of predictable and unpredictable stress on depression is still not fully understood. Methods: The chronic restraint stress (CRS) is to restrain the mice for 6 h per day for 3 weeks, and the chronic unpredictable mild stress (CUMS) is to stimulate the mice with 7 different stressors for 3 weeks. We evaluated the combined effect of CRS and CUMS on depression-like symptoms using behavioral tests and investigated the action mechanism through analysis of neurotransmitters, brain-derived factors, inflammatory factors, antioxidants, and intestinal microorganisms. Results: Our data suggested the combined stress of CRS and CUMS caused significant weight loss, food intake reduction, depression-like behaviors-including anhedonia, learned helplessness, and reduction in spontaneous activity-and even atrophy and severe structural damage to the hippocampus in mice. Our pathogenesis study showed that combined stress-induced the reduction of glucocorticoid receptor (GR) levels, loss of oligodendrocytes (NG2 and Olig2 cells), and inhibition of neuron proliferation in the CA1, CA3, and DG regions of the hippocampus, decreased the contents of monoamine neurotransmitters (5HT and NE) and BDNF in the cerebral cortex, caused hyperactivity of the HPA system, led to immune dysfunction, aggravated oxidative stress, and weakened the capacity of antioxidants in mice. Compared with single stress, combined stress gave rise to a more significant diversity change of the gut microbiota. Conclusions: Combined stress caused significant depression-like behaviors, atrophy, and severe structural damage to the hippocampus in mice via monoamine neurotransmitter, BDNF, HPA axis, neurogenesis, and neurodegenerative, immune, oxidative stress and gut-brain axis action pathways.
关键词	Depression predictable stress chronic unpredictability mild stress combined stress chronic bondage stress
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60283
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Qiao, Yajun,Zhao, Jiubo,Li, Cen,et al. Effect of combined chronic predictable and unpredictable stress on depression-like symptoms in mice[J]. ANNALS OF TRANSLATIONAL MEDICINE,2020,8(15).
APA	Qiao, Yajun.,Zhao, Jiubo.,Li, Cen.,Zhang, Ming.,Wei, Lixin.,...&Gao, Tingting.(2020).Effect of combined chronic predictable and unpredictable stress on depression-like symptoms in mice.ANNALS OF TRANSLATIONAL MEDICINE,8(15).
MLA	Qiao, Yajun,et al."Effect of combined chronic predictable and unpredictable stress on depression-like symptoms in mice".ANNALS OF TRANSLATIONAL MEDICINE 8.15(2020).