Evidence map›Paper›PMID 34651448›Full record

SynthesisThoracic cancer2021

MGMT gene promoter methylation in humoral tissue as biomarker for lung cancer diagnosis: An update meta-analysis.

Bizheng Chen, Xiaozhen Ying, Liming Bao

Open access · goldAbstract readMeta-Analysis
In one paragraph

Synthesis in Thoracic cancer, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 2 pooled it
0.6field-weighted citation impact, top 35% 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

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

  1. Biomarkers Suitable for Early Detection of Intrathoracic Cancers in Primary Care: A Systematic Review.Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology · 2025
    Pooled it
  2. Pooled it
  3. Hallmarks of the ageing lung: 10 years later.The European respiratory journal · 2026
    Review
  4. High-Penetrance Rare Variants Underlying Familial Lung Cancer Risk: Insights From Genetic Epidemiology of Lung Cancer Consortium.Journal of thoracic oncology : official publication of the International Association for the Study of Lung Cancer · 2026
    Article
  5. Review
  6. Article
  7. Review
  8. Review
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  10. 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

3 authors at 1 institution in 1 country.

Bizheng ChenDepartment of Radiotherapy, Lishui Central Hospital, Lishui, Zhejiang Province, China.ORCID 0000-0001-5540-1678
Xiaozhen YingDepartment of Radiotherapy, Lishui Central Hospital, Lishui, Zhejiang Province, China.
Liming BaoDepartment of Radiotherapy, Lishui Central Hospital, Lishui, Zhejiang Province, China.
Lishui Central Hospital · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo investigate O-6-methylguanine-DNA methyltransferase (MGMT) gene promoter methylation in humoral tissue as biomarker for lung cancer diagnosis by pooling relevant open published data.

methodsClinical studies relevant to MGMT gene promoter methylation and lung cancer were systematic electronic searched in the databases of Medline, EMBASE, Ovid, Web of Science, and CNKI. Data of true positive (tp), false positive (fp), false negative (fn), and true negative (tn) were extracted from the included studies and made combination. The diagnostic sensitivity, specificity, diagnostic odds ratio (DOR) and summary receiver operating characteristic (SROC) of MGMT gene methylation for lung cancer diagnosis were pooled.

resultsTwelve studies were included in the meta-analysis. The diagnostic sensitivity, specificity, DOR were 0.39 (95% CI = 0.31-0.49) 0.92 (95% CI = 0.77-0.97), and 4.20 (95% CI = 2.09-8.44), respectively under random effect model. The SROC of MGMT gene methylation for lung cancer diagnosis was 0.58 (95% CI = 0.53-0.62).

conclusionMGMT methylation rate was higher in plasma and bronchoalveolar lavage fluid (BLAF) of lung cancer cases compared to controls. High diagnostic specificity indicated that MGMT methylation in plasma and BLAF can be applied as lung cancer confirmation test.

Indexed as

Biomarkers, TumorCarcinoma, Non-Small-Cell LungDNA MethylationDNA Modification MethylasesDNA Repair EnzymesHumansLung NeoplasmsPromoter Regions, GeneticTumor Suppressor ProteinsBiomarkers, TumorDNA Modification MethylasesDNA Repair EnzymesMGMT protein, humanTumor Suppressor Proteinsbiomarkerlung cancer diagnosismeta-analysisMGMT genepromoter methylation

Identifiers

PMID34651448
PMCPMC8636218
OpenAlexW3207084412

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.