Evidence map›Paper›PMID 26016497›Full record

SynthesisInternational journal of molecular sciences2015

Are MTHFR C677T and MTRR A66G Polymorphisms Associated with Overweight/Obesity Risk? From a Case-Control to a Meta-Analysis of 30,327 Subjects.

Shu-Jun Fan, Bo-Yi Yang, Xue-Yuan Zhi, Miao He, Da Wang, Yan-Xun Wang, Yi-Nuo Wang, Jian Wei, Quan-Mei Zheng, Gui-Fan Sun

Abstract readMeta-Analysis
In one paragraph

Synthesis in International journal of molecular sciences, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

12 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Case report: Rare variants in theFrontiers in psychiatry · 2024
    Article
  3. Review
  4. Article
  5. Article
  6. Association ofFrontiers in psychiatry · 2021
    Article
  7. C677T Polymorphism in theFrontiers in psychiatry · 2020
    Article
  8. Article
  9. Review
  10. Plausible relationship between homocysteine and obesity risk viaDiabetes, metabolic syndrome and obesity : targets and therapy · 2019
    Article
  11. Article
  12. 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

10 authors.

Shu-Jun FanResearch Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110013, China. fanfan0721ykl@163.com.
Bo-Yi YangResearch Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110013, China. boyiyangcmu@163.com.
Xue-Yuan ZhiResearch Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110013, China. zhixy90smile@126.com.
Miao HeResearch Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110013, China. hemiao.cmu@gmail.com.
Da WangResearch Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110013, China. 472594283@163.com.
Yan-Xun WangDivision of Molecular Preventive Medicine, Shanghai Institute of Targeted Therapy and Molecular Medicine, Shanghai 200433, China. wangyanxun@genechina.com.
Yi-Nuo WangDivision of Molecular Preventive Medicine, Shanghai Institute of Targeted Therapy and Molecular Medicine, Shanghai 200433, China. wangyanxun@genechina.com.
Jian WeiBrain Disease Center, Tianjin Dagang Oil Field General Hospital, Tianjin 300280, China. weijiantianjin@163.com.
Quan-Mei ZhengResearch Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110013, China. qmzheng@mail.cmu.edu.cn.
Gui-Fan SunResearch Center of Environment and Non-Communicable Disease, School of Public Health, China Medical University, Shenyang 110013, China. sungf@mail.cmu.edu.cn.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Several studies have examined the associations of methylenetetrahydrofolate reductase (MTHFR) C677T and methionine synthase reductase (MTRR) A66G polymorphisms with being overweight/obesity. However, the results are still controversial. We therefore conducted a case-control study (517 cases and 741 controls) in a Chinese Han population and then performed a meta-analysis by combining previous studies (5431 cases and 24,896 controls). In our case-control study, the MTHFR C677T polymorphism was not significantly associated with being overweight/obesity when examining homozygous codominant, heterozygous codominant, dominant, recessive and allelic genetic models. The following meta-analysis confirmed our case-control results. Heterogeneity was minimal in the overall analysis, and sensitivity analyses and publication bias tests indicated that the meta-analytic results were reliable. Similarly, both the case-control study and meta-analysis found no significant association between the MTRR A66G polymorphism and being overweight/obesity. However, sensitivity analyses showed that the associations between the MTRR A66G polymorphism and being overweight/obesity became significant in the dominant, heterozygous codominant and allelic models after excluding our case-control study. The results from our case-control study and meta-analysis suggest that both of the two polymorphisms are not associated with being overweight/obesity. Further large-scale population-based studies, especially for the MTRR A66G polymorphism, are still needed to confirm or refute our findings.

Indexed as

Polymorphism, Single NucleotideAdultAsian PeopleCase-Control StudiesChinaFemaleFerredoxin-NADP ReductaseGenetic Association StudiesGenetic Predisposition to DiseaseHumansMaleMethylenetetrahydrofolate Reductase (NADPH2)Middle AgedObesityOverweightFerredoxin-NADP Reductasemethionine synthase reductaseMethylenetetrahydrofolate Reductase (NADPH2)MTHFR protein, humanMTHFRMTRRobesityoverweightpolymorphism

Identifiers

PMID26016497
PMCPMC4490418

What OpenQuestion holds

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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.