Evidence map›Paper›PMID 30278485›Full record

SynthesisMedicine2018

Association of CYP2E1 gene polymorphisms with bladder cancer risk: A systematic review and meta-analysis.

Xiangrui Yin, Wei Xiong, You Wang, Wei Tang, Wang Xi, Shengqiang Qian, Yu Guo

Open access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Medicine, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 25% 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

16 citing papers in PubMed, 1 synthesis or guideline pooled it, 26 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Solvent Exposure, Genetic Susceptibility, and Risk of Bladder Cancer.Cancer prevention research (Philadelphia, Pa.) · 2025
    Article
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  16. Analysis of Cumulative Cancer Risk Associated with Disinfection Byproducts in United States Drinking Water.International journal of environmental research and public health · 2020
    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

7 authors at 1 institution in 1 country.

Xiangrui YinDepartment of Urology, Chongqing Hospital of Traditional Chinese Medicine.
Wei XiongDepartment of Urology, Chongqing Hospital of Traditional Chinese Medicine.
You WangDepartment of Urology, Chongqing Hospital of Traditional Chinese Medicine.
Wei TangDepartment of Urology, First Affiliated Hospital, Medical University of Chongqing, Chongqing, China.
Wang XiDepartment of Urology, Chongqing Hospital of Traditional Chinese Medicine.
Shengqiang QianDepartment of Urology, Chongqing Hospital of Traditional Chinese Medicine.
Yu GuoDepartment of Urology, Chongqing Hospital of Traditional Chinese Medicine.
First People's Hospital of Chongqing · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHuman cytochrome P450 (CYP) is an enzyme responsible for the metabolic activation of many carcinogens, including nitrosamines. CYP2E1 represents a major CYP isoform and is expressed in the human urothelial cells. Recent studies have investigated the association of CYP2E1 gene polymorphisms with bladder cancer risk but have shown contradictory results. Hence, we performed a systematic literature review and meta-analysis to assess the association between CYP2E1 gene polymorphisms and bladder cancer.

methodsSystematic literature searches were conducted with PubMed, Excerpt Medica Database, Science Direct/Elsevier, China National Knowledge Infrastructure, and the Cochrane Library up to January 2018 for studies that involved the association of CYP2E1 gene polymorphisms with bladder cancer risk. A meta-analysis was performed with Review Manager and Stata software. Combined odds ratios (ORs) were identified with 95% confidence intervals (CIs) in a random or fixed effects model. ETHICS: The protocol was approved by the institutional review board of each study center. Written informed consent will be obtained from all patients before registration, in accordance with the Declaration of Helsinki.

resultsEight studies were identified, including 1733 cases of bladder cancer and 1814 normal controls. Our results illustrated that there are significant associations between CYP2E1 gene polymorphisms and bladder cancer in all genetic models (P < .05). The combined ORs and 95% CIs were as follows for each model: additive model [OR 0.56; 95% CI (0.38-0.82)]; dominant model [OR 0.79; 95% CI (0.67-0.93)]; recessive model [OR 0.61; 95% CI (0.41-0.89)]; codominant model [OR 0.80; 95% CI (0.67-0.96)]; allele model [OR 0.75; 95% CI (0.59-0.95)]. A subgroup study showed that there are also significant associations between CYP2E1 gene polymorphisms and bladder cancer in Asian people. However, there are no significant associations between CYP2E1 gene polymorphisms and bladder cancer in Caucasian populations.

conclusionsThe present study provides evidence for an association between CYP2E1 gene polymorphisms and bladder cancer progression, and suggests that CYP2E1 gene polymorphisms might be a protective factor against bladder cancer in Asian people. However, studies with larger sample sizes are needed to confirm the correlation between CYP2E1 gene polymorphisms and bladder cancer.

Indexed as

Cytochrome P-450 CYP2E1Disease ProgressionGenetic Predisposition to DiseaseHumansPolymorphism, GeneticUrinary BladderUrinary Bladder NeoplasmsCytochrome P-450 CYP2E1

Identifiers

PMID30278485
PMCPMC6181476
OpenAlexW2894980056

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.