Evidence map›Paper›PMID 32953742›Full record

ArticleAnnals of translational medicine2020

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

Yajun Qiao, Jiubo Zhao, Cen Li, Ming Zhang, Lixin Wei, Xiaoyuan Zhang, Olga Kurskaya, Hongtao Bi, Tingting Gao

Open access · diamondAbstract read
In one paragraph

Article in Annals of translational medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 12% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

34 citing papers in PubMed, 1 synthesis or guideline pooled it, 68 citations in OpenAlex.

  1. Pooled it
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 5 institutions in 2 countries.

Yajun QiaoDepartment of Psychology, School of Public Health, Southern Medical University, Guangzhou, China.
Jiubo ZhaoDepartment of Psychology, School of Public Health, Southern Medical University, Guangzhou, China.
Cen LiQinghai Provincial Key Laboratory of Tibetan Medicine Pharmacology and Safety Evaluation, Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining, China.
Ming ZhangQinghai Provincial Key Laboratory of Tibetan Medicine Pharmacology and Safety Evaluation, Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining, China.
Lixin WeiQinghai Provincial Key Laboratory of Tibetan Medicine Pharmacology and Safety Evaluation, Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining, China.
Xiaoyuan ZhangDepartment of Psychology, School of Public Health, Southern Medical University, Guangzhou, China.
Olga KurskayaDepartment of Experimental Modeling and Pathogenesis of Infectious Diseases, Federal Research Center of Fundamental and Translational Medicine, Novosibirsk, Russia.
Hongtao BiQinghai Provincial Key Laboratory of Tibetan Medicine Pharmacology and Safety Evaluation, Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining, China.
Tingting GaoDepartment of Psychology, School of Public Health, Southern Medical University, Guangzhou, China.
Institute of Tibetan Plateau Research · CNChinese Academy of Sciences · CNZhujiang Hospital · CNFederal Research Center of Fundamental and Translational Medicine · RUSouthern Medical University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMental 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.

methodsThe 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.

resultsOur 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 (5-HT 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.

conclusionsCombined 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.

Indexed as

chronic bondage stresschronic unpredictability mild stresscombined stressDepressionpredictable stress

Identifiers

PMID32953742
PMCPMC7475446
OpenAlexW3048389724

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.