Evidence map›Paper›PMID 29362385›Full record

SynthesisScientific reports2018

A systematic review and meta-analysis: Association between MGMT hypermethylation and the clinicopathological characteristics of non-small-cell lung carcinoma.

Lin Chen, Yong Wang, Fen Liu, Liyao Xu, Feifei Peng, Ning Zhao, Biqi Fu, Zijie Zhu, Yu Shi, Jiansheng Liu and 4 more

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
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  11. Article
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  13. Review
  14. Article
  15. A highlight on Sonic hedgehog pathway.Cell communication and signaling : CCS · 2018
    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

14 authors.

Lin ChenDepartment of Internal Neurology, The Affiliated Ganzhou Hospital of Nanchang University (Ganzhou People's Hospital), Ganzhou, Jiangxi, 341000, China.
Yong WangDepartment of Medical Oncology, The Affiliated Ganzhou Hospital of Nanchang University (Ganzhou People's Hospital), Ganzhou, Jiangxi, 341000, China.
Fen LiuCritical Care Medicine, The First Affiliated Hospital of Nanchang University, Nanchan, Jiangxi, 330000, China.
Liyao XuDepartment of Medical Oncology, The First Affiliated Hospital of Nanchang University, Nanchan, Jiangxi, 330000, China.
Feifei PengCritical Care Medicine, The First Affiliated Hospital of Nanchang University, Nanchan, Jiangxi, 330000, China.
Ning ZhaoCritical Care Medicine, The First Affiliated Hospital of Nanchang University, Nanchan, Jiangxi, 330000, China.
Biqi FuDepartment of Rheumatology, The First Affiliated Hospital of Nanchang University, Nanchan, Jiangxi, 330000, China.
Zijie ZhuDepartment of Medical Oncology, The First Affiliated Hospital of Nanchang University, Nanchan, Jiangxi, 330000, China.
Yu ShiDepartment of Medical Oncology, The First Affiliated Hospital of Nanchang University, Nanchan, Jiangxi, 330000, China.
Jiansheng LiuDepartment of Medical Oncology, The Affiliated Ganzhou Hospital of Nanchang University (Ganzhou People's Hospital), Ganzhou, Jiangxi, 341000, China.
Renrui WuDepartment of Internal Neurology, The Affiliated Ganzhou Hospital of Nanchang University (Ganzhou People's Hospital), Ganzhou, Jiangxi, 341000, China.
Chen WangDepartment of Internal Neurology, The Affiliated Ganzhou Hospital of Nanchang University (Ganzhou People's Hospital), Ganzhou, Jiangxi, 341000, China.
Shengmin YaoDepartment of Internal Neurology, The Affiliated Ganzhou Hospital of Nanchang University (Ganzhou People's Hospital), Ganzhou, Jiangxi, 341000, China.
Yong LiDepartment of Medical Oncology, The First Affiliated Hospital of Nanchang University, Nanchan, Jiangxi, 330000, China. liyongcsco@gmail.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The relationship between O-6-methylguanine-DNA methyltransferase (MGMT) promoter methylation and clinicopathological characteristics of non-small-cell lung carcinoma (NSCLC) has remained controversial and unclear. Therefore, in this study we have undertaken a systematic review and meta-analysis of relevant studies to quantitatively investigate this association. We identified 30 eligible studies investigating 2714 NSCLC patients. The relationship between MGMT hypermethylation and NSCLC was identified based on 20 studies, including 1539 NSCLC patient tissue and 1052 normal and adjacent tissue samples (OR = 4.60, 95% CI = 3.46~6.11, p < 0.00001). MGMT methylation varied with ethnicity (caucasian: OR = 4.56, 95% CI = 2.63~7.92, p < 0.00001; asian: OR = 5.18, 95% CI = 2.03~13.22, p = 0.0006) and control style (autologous: OR = 4.44, 95% CI = 3.32~5.92, p < 0.00001; heterogeneous: OR = 9.05, 95% CI = 1.79~45.71, p = 0.008). In addition, MGMT methylation was observed to be specifically associated with NSCLC clinical stage, and not with age, sex, smoking, pathological types, and differentiation status. Also MGMT methylation did not impact NSCLC patients survival (HR = 1.32, 95% CI = 0.77~2.28, p = 0.31). Our study provided clear evidence about the association of MGMT hypermethylation with increased risk of NSCLC.

Indexed as

DNA MethylationCarcinoma, Non-Small-Cell LungDNA Modification MethylasesDNA Repair EnzymesFemaleGenetic Association StudiesHumansLung NeoplasmsMaleNeoplasm StagingPromoter Regions, GeneticTumor Suppressor ProteinsDNA Modification MethylasesDNA Repair EnzymesMGMT protein, humanTumor Suppressor Proteins

Identifiers

PMID29362385
PMCPMC5780517

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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.