Evidence map›Paper›PMID 23555617›Full record

SynthesisPloS one2013

MLH1 promoter methylation frequency in colorectal cancer patients and related clinicopathological and molecular features.

Xia Li, Xiaoping Yao, Yibaina Wang, Fulan Hu, Fan Wang, Liying Jiang, Yupeng Liu, Da Wang, Guizhi Sun, Yashuang Zhao

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in PloS one, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed
–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

65 citing papers in PubMed.

  1. Review
  2. Review
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Review
  9. Review
  10. Genes · 2025
    Article
  11. Article
  12. Article
  13. Review
  14. Review
  15. Review
  16. Article
  17. Article
  18. Article
  19. Dynamic changes of DNA methylation induced by benzo(a)pyrene in cancer.Genes and environment : the official journal of the Japanese Environmental Mutagen Society · 2023
    Review
  20. Article

5 more citing papers are in PubMed but not listed here.

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

10 authors.

Xia LiDepartment of Epidemiology, Public Health College, Harbin Medical University, Harbin, Heilongjiang Province, P.R. China.
Xiaoping Yao
Yibaina Wang
Fulan Hu
Fan Wang
Liying Jiang
Yupeng Liu
Da Wang
Guizhi Sun
Yashuang Zhao

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo describe the frequency of MLH1 promoter methylation in colorectal cancer (CRC); to explore the associations between MLH1 promoter methylation and clinicopathological and molecular factors using a systematic review and meta-analysis.

methodsA literature search of the PubMed and Embase databases was conducted to identify relevant articles published up to September 7, 2012 that described the frequency of MLH1 promoter methylation or its associations with clinicopathological and molecular factors in CRC. The pooled frequency, odds ratio (OR) and 95% confidence intervals (95% CI) were calculated.

resultsThe pooled frequency of MLH1 promoter methylation in unselected CRC was 20.3% (95% CI: 16.8-24.1%). They were 18.7% (95% CI: 14.7-23.6%) and 16.4% (95% CI: 11.9-22.0%) in sporadic and Lynch syndrome (LS) CRC, respectively. Significant associations were observed between MLH1 promoter methylation and gender (pooled OR = 1.641, 95% CI: 1.215-2.215; P = 0.001), tumor location (pooled OR = 3.804, 95% CI: 2.715-5.329; P<0.001), tumor differentiation (pooled OR = 2.131, 95% CI: 1.464-3.102; P<0.001), MSI (OR: 27.096, 95% CI: 13.717-53.526; P<0.001). Significant associations were also observed between MLH1 promoter methylation and MLH1 protein expression, BRAF mutation (OR = 14.919 (95% CI: 6.427-34.631; P<0.001) and 9.419 (95% CI: 2.613-33.953; P = 0.001), respectively).

conclusionThe frequency of MLH1 promoter methylation in unselected CRC was 20.3%. They were 18.7% in sporadic CRC and 16.4% in LS CRC, respectively. MLH1 promoter methylation may be significantly associated with gender, tumor location, tumor differentiation, MSI, MLH1 protein expression, and BRAF mutation.

Indexed as

DNA MethylationPromoter Regions, GeneticAdaptor Proteins, Signal TransducingColorectal NeoplasmsFemaleHumansMaleMicrosatellite InstabilityMutationMutL Protein Homolog 1Neoplasm GradingNeoplasm StagingNuclear ProteinsProto-Oncogene Proteins B-rafPublication Biasras ProteinsAdaptor Proteins, Signal TransducingMLH1 protein, humanMutL Protein Homolog 1Nuclear ProteinsProto-Oncogene Proteins B-rafras Proteins

Identifiers

PMID23555617
PMCPMC3612054

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.