Evidence map›Paper›PMID 29195029›Full record

SynthesisMolecular genetics & genomic medicine2018

Association of MGMT promoter methylation with tumorigenesis features in patients with ovarian cancer: A systematic meta-analysis.

Baoli Qiao, Zhenyu Zhang, Yanfang Li

Open access · goldAbstract readMeta-Analysis
In one paragraph

Synthesis in Molecular genetics & genomic medicine, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 2 pooled it
0.8field-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

12 citing papers in PubMed, 2 syntheses or guidelines pooled it, 15 citations in OpenAlex.

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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

3 authors at 1 institution in 1 country.

Baoli QiaoDepartment of Gynaecology and Obstetrics, Beijing Chao-Yang Hospital Affiliated to Capital Medical University, Beijing, China.
Zhenyu ZhangDepartment of Gynaecology and Obstetrics, Beijing Chao-Yang Hospital Affiliated to Capital Medical University, Beijing, China.ORCID 0000-0001-6399-8523
Yanfang LiDepartment of Gynaecology and Obstetrics, Beijing Chao-Yang Hospital Affiliated to Capital Medical University, Beijing, China.
Capital Medical University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe MGMT is a key tumor suppressor gene and aberrant promoter methylation has been reported in many cancers. However, the relationship between MGMT promoter methylation and ovarian cancer remains controversial. This meta-analysis was first conducted to estimate the clinical significance of MGMT promoter methylation in ovarian carcinoma.

methodsLiterature search was performed in the PubMed, Embase, EBSCO and Cochrane Library databases. The pooled odds ratio (OR) and their corresponding 95% confidence interval (95% CI) were summarized.

resultsFinal 10 studies with 910 ovarian tissue samples were included in this meta-analysis. MGMT promoter methylation was significantly higher in ovarian cancer than in normal ovarian tissues (OR = 4.13, 95% CI = 2.32-7.33, p < .001). The MGMT had a similar methylation status in cancer versus benign lesions and low malignant potential (LMP) samples (OR = 2.01, 95% CI = 0.67-6.04, p = .212; OR = 1.42, 95% CI = 0.46-4.40, p = .543; respectively). MGMT promoter methylation was correlated with pathological types in which it was significantly lower in serous cancer than in nonserous cancer (OR = 0.29, 95% CI = 0.14-0.59, p = .001). The methylation of the MGMT promoter was not associated with clinical stage and tumor grade (OR = 1.46, 95% CI = 0.71-3.02, p = .301; OR = 1.13, 95% CI = 0.51-2.46, p = .767; respectively).

conclusionsMGMT promoter methylation may be correlated with the tumorigenesis of ovarian cancer. It was associated with tumor histotypes, but not correlated with clinical stage and tumor grade. More prospective studies with lager sample sizes are necessary in the future.

Indexed as

AdultAgedCarcinogenesisCell Transformation, NeoplasticDNA MethylationDNA Modification MethylasesDNA Repair EnzymesFemaleHumansMiddle AgedOdds RatioOvarian NeoplasmsPromoter Regions, GeneticProspective StudiesTumor Suppressor ProteinsDNA Modification MethylasesDNA Repair EnzymesMGMT protein, humanTumor Suppressor Proteinsclinical featuresmethylationMGMTovarian cancer

Identifiers

PMID29195029
PMCPMC5823672
OpenAlexW2772144536

What OpenQuestion holds

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LicenceCC BY
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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.