Evidence map›Paper›PMID 32160860›Full record

ArticleBMC genomics2020

Endogenous circadian time genes expressions in the liver of mice under constant darkness.

Huan Li, Shiyao Zhang, Wenxiang Zhang, Siyu Chen, Anjara Rabearivony, Yujie Shi, Jie Liu, Christopher J Corton, Chang Liu

Open access · goldAbstract read
In one paragraph

Article in BMC genomics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 10% 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

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 36 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Dominant constraints on the evolution of rhythmic gene expression.Computational and structural biotechnology journal · 2023
    Article
  7. Article
  8. Article
  9. Article
  10. Circadian Rhythms, Disease and Chronotherapy.Journal of biological rhythms · 2021
    Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. The circadian clock shapes theThe Journal of biological chemistry · 2020
    Article
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 3 institutions in 2 countries.

Huan LiSchool of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China.
Shiyao ZhangSchool of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China.
Wenxiang ZhangSchool of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China.
Siyu ChenSchool of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China.
Anjara RabearivonySchool of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China.
Yujie ShiSchool of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China.
Jie LiuKey Laboratory of Basic Pharmacology of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China.
Christopher J CortonComputational Toxicology Division, US Environmental Protection Agency, Research Triangle Park, NC, USA.
Chang LiuSchool of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China. changliu@cpu.edu.cn.
China Pharmaceutical University · CNEnvironmental Protection Agency · USResearch Triangle Park Foundation · US

Funding

National Natural Science Foundation of China 311771298National Natural Science Foundation of China 81800512Natural Science Foundation of Ningbo 31800992Postgraduate Research & Practice Innovation Program of Jiangsu Province (CN) KYCX18_0781Postgraduate Research & Practice Innovation Program of Jiangsu Province (CN) KYCX19_0660
6 · The paper itself

Abstract

backgroundThe circadian rhythms regulate physiological functions and metabolism. Circadian Time (CT) is a unit to quantify the rhythm of endogenous circadian clock, independent of light influence. To understand the gene expression changes throughout CT, C57BL/6 J mice were maintained under constant darkness (DD) for 6 weeks, and the liver samples were collected starting at 9:00 AM (CT1), and every 4 h in a 24-h cycle (CT5, CT9, CT13, CT17 and CT21). Total RNA was extracted and subjected to RNA-Seq data (deposited as GSE 133342, L-DD). To compare gene oscillation pattern under normal light-dark condition (LD, GSE114400) and short time (2 days) dark-dark condition (S-DD, GSE70497), these data were retried from GEO database, and the trimmed mean of M-values normalization was used to normalize the three RNA-seq data followed by MetaCycle analysis.

resultsApproximate 12.1% of the genes under L-DD exhibited significant rhythmically expression. The top 5 biological processes enriched in L-DD oscillation genes were mRNA processing, aromatic compound catabolic process, mitochondrion organization, heterocycle catabolic process and cellular nitrogen compound mitotic catabolic process. The endogenous circadian rhythms of clock genes, P450 genes and lipid metabolism genes under L-DD were further compared with LD and S-DD. The oscillation patterns were similar but the period and amplitude of those oscillation genes were slightly altered. RT-qPCR confirmed the selected RNA sequence findings.

conclusionsThis is the first study to profile oscillation gene expressions under L-DD. Our data indicate that clock genes, P450 genes and lipid metabolism genes expressed rhythmically under L-DD. Light was not the necessary factor for persisting circadian rhythm but influenced the period and amplitude of oscillation genes.

Indexed as

AnimalsCircadian RhythmCLOCK ProteinsCytochrome P-450 Enzyme SystemDarknessGene Expression ProfilingGene Expression RegulationLipid MetabolismLiverMiceMice, Inbred C57BLSequence Analysis, RNACLOCK ProteinsCytochrome P-450 Enzyme SystemCircadian timeConstant darknessMetaCycleMouse liverRNA sequenceRT-qPCR

Identifiers

PMID32160860
PMCPMC7066782
OpenAlexW3011857899

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LicenceCC BY
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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.