Evidence map›Paper›PMID 33083827›Full record

ArticleBioscience reports2020

The circadian rhythm and core gene Period2 regulate the chemotherapy effect and multidrug resistance of ovarian cancer through the PI3K signaling pathway.

Zhaoxia Wang, Honghong Wang, Hongrui Guo, Fengyan Li, Weiwei Wu, Sanyuan Zhang, Tong Wang

Open access · goldAbstract read
In one paragraph

Article in Bioscience reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
1.0field-weighted citation impact, top 28% 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

15 citing papers in PubMed, 19 citations in OpenAlex.

  1. Review
  2. Review
  3. Chemoresistance in Ovarian Cancer and Association with Circadian Rhythm.Reproductive sciences (Thousand Oaks, Calif.) · 2026
    Review
  4. Review
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  10. Biological clock regulation by theFrontiers in cell and developmental biology · 2024
    Review
  11. Review
  12. Article
  13. Review
  14. Article
  15. New Insights Into Cancer Chronotherapies.Frontiers in pharmacology · 2021
    Review
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

7 authors at 3 institutions in 1 country.

Zhaoxia WangDepartment of Obstetrics and Gynecology, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China.
Honghong WangDepartment of Obstetrics and Gynecology, Women Health Center of Shanxi, Taiyuan, Shanxi, China.
Hongrui GuoDepartment of Gynecology and Obstetrics, Yuncheng Central Hospital, Yuncheng, Shanxi, China.
Fengyan LiDepartment of Obstetrics and Gynecology, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China.
Weiwei WuSchool of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China.
Sanyuan ZhangDepartment of Obstetrics and Gynecology, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China.
Tong WangSchool of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China.
Shanxi Medical University · CNShanxi Cardiovascular Hospital · CNYuncheng University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundOvarian cancer is the most lethal cancer in the female reproductive system. It has been shown that 'time chemotherapy' of ovarian cancer has an important impact on the chemotherapy effect and prognosis of patients, but the specific mechanism is not known.

methodsWe designed a case-control study in strict accordance with epidemiological principles. We collected resection samples of ovarian cancer patients who worked night-shifts and those who did not, and analyzed the differences in protein expression. Through construction of a normal/circadian-rhythm disorder model of ovarian cancer in nude mice, we explored the molecular mechanism of a 'biological clock' rhythm on treatment of ovarian cancer.

resultsExpression of interleukin (IL)-6, programmed cell death receptor-1 (PD-1) and programmed death ligand 1 (PD-L1) increased, and expression of tumor necrosis factor (TNF)-α, Period 1 (Per1) and Period 2 (Per2) decreased in the night-shift group. Methylation of CpG islands in the promoter of Per2 could result in its decreased expression in SKOV3/DDP (Cisplatin) cells. Dysrhythmia of the circadian clock: (i) had a negative effect on the chemotherapy effect against ovarian cancer; (ii) affected expression of immune factors and the phosphoinositide 3-kinase/protein kinase B (PI3K/Akt) signaling pathway.

conclusionThe Per2 gene can affect the drug resistance of ovarian cancer by inhibiting the PI3K/Akt signaling pathway and then acting on its downstream drug-resistance factors, thereby providing a new target for ovarian cancer treatment.

Indexed as

Circadian RhythmDrug Resistance, MultipleDrug Resistance, NeoplasmShift Work ScheduleAnimalsAntineoplastic AgentsCase-Control StudiesCell Line, TumorCisplatinCpG IslandsDNA MethylationFemaleHumansMice, Inbred BALB CMice, NudeOvarian NeoplasmsAntineoplastic AgentsCisplatinPER2 protein, humanPeriod Circadian ProteinsPhosphatidylinositol 3-KinaseProto-Oncogene Proteins c-aktcircadian rhythmmultidrug resistanceOvarian cancerPeriod2 gene

Identifiers

PMID33083827
PMCPMC7607197
OpenAlexW3093559111

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Registered trials

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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.