Evidence map›Paper›PMID 28552956›Full record

SynthesisPloS one2017

Sex-specific effect of CPB2 Ala147Thr but not Thr325Ile variants on the risk of venous thrombosis: A comprehensive meta-analysis.

Nora Zwingerman, Alejandra Medina-Rivera, Irfahan Kassam, Michael D Wilson, Pierre-Emmanuel Morange, David-Alexandre Trégouët, France Gagnon

Open access · goldAbstract readMeta-Analysis
In one paragraph

Synthesis in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
0.5field-weighted citation impact, top 32% 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

7 citing papers in PubMed, 11 citations in OpenAlex.

  1. Thrombin-Activatable Fibrinolysis Inhibitor Polymorphisms and Cerebral Venous Thrombosis in Mexican Mestizo Patients.Clinical and applied thrombosis/hemostasis : official journal of the International Academy of Clinical and Applied Thrombosis/Hemostasis · 2018
    Trial
  2. Article
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  6. Semi-empirical anticoagulation model (SAM): INR monitoring during Warfarin therapy.Journal of pharmacokinetics and pharmacodynamics · 2022
    Article
  7. 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

7 authors at 5 institutions in 3 countries.

Nora ZwingermanDivision of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.
Alejandra Medina-RiveraGenetics and Genome Biology Program, SickKids Research Institute, Toronto, Canada.
Irfahan KassamDivision of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.
Michael D WilsonGenetics and Genome Biology Program, SickKids Research Institute, Toronto, Canada.
Pierre-Emmanuel MorangeInstitut National de la Santé et de la Recherche Médicale (INSERM), Unité Mixte de Recherche (UMR) en Santé 1062, Nutrition Obesity and Risk of Thrombosis, Marseille, France.
David-Alexandre TrégouëtInstitut National de la Santé et de la Recherche Médicale (INSERM), Unité Mixte de Recherche en Santé (UMR_S) 1166, Paris, France.
France GagnonDivision of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.
Public Health Ontario · CAUniversity of Toronto · CAAix-Marseille Université · FRAutonomous University of Queretaro · MXSorbonne Université · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThrombin activatable fibrinolysis inhibitor (TAFI), encoded by the Carboxypeptidase B2 gene (CPB2), is an inhibitor of fibrinolysis and plays a role in the pathogenesis of venous thrombosis. Experimental findings support a functional role of genetic variants in CPB2, while epidemiological studies have been unable to confirm associations with risk of venous thrombosis. Sex-specific effects could underlie the observed inconsistent associations between CPB2 genetic variants and venous thrombosis.

methodsA comprehensive literature search was conducted for associations between Ala147Thr and Thr325Ile variants with venous thrombosis. Authors were contacted to provide sex-specific genotype counts from their studies. Combined and sex-specific random effects meta-analyses were used to estimate a pooled effect estimate for primary and secondary genetic models.

resultsA total of 17 studies met the inclusion criteria. A sex-specific meta-analysis applying a dominant model supported a protective effect of Ala147Thr on venous thrombosis in females (OR = 0.81, 95%CI: 0.68,0.97; p = 0.018), but not in males (OR = 1.06, 95%CI:0.96-1.16; p = 0.263). The Thr325Ile did not show a sex-specific effect but showed variation in allele frequencies by geographic region. A subgroup analysis of studies in European countries showed decreased risk, with a recessive model (OR = 0.83, 95%CI:0.71-0.97, p = 0.021) for venous thrombosis.

conclusionsA comprehensive literature review, including unpublished data, provided greater statistical power for the analyses and decreased the likelihood of publication bias influencing the results. Sex-specific analyses explained apparent discrepancies across genetic studies of Ala147Thr and venous thrombosis. While, careful selection of genetic models based on population genetics, evolutionary and biological knowledge can increase power by decreasing the need to adjust for testing multiple models.

Indexed as

Genetic Predisposition to DiseaseSex FactorsAlanineCarboxypeptidase B2FemaleHumansIsoleucineMaleRisk FactorsThreonineVenous ThrombosisAlanineCarboxypeptidase B2CPB2 protein, humanIsoleucineThreonine

Identifiers

PMID28552956
PMCPMC5446132
OpenAlexW2618797115

What OpenQuestion holds

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LicenceCC BY
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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.