Gene Variants Associated With Venous Thrombosis: A Replication Study in a Brazilian Multicentre Study
Anna Virgínia Calazans Romano1, Aline Barnabé1, Telma Barbosa Gadelha2
1Hematology and Hemotherapy Center, 28132University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil.
This study investigated single nucleotide polymorphisms (SNPs) linked to venous thromboembolism (VTE) risk in Brazil. Despite adequate sample power, no replicated VTE-associated SNPs were found, suggesting population admixture influences genetic association studies.
Area of Science:
- Genetics
- Epidemiology
- Medical Science
Background:
- Single nucleotide polymorphisms (SNPs) associated with venous thromboembolism (VTE) risk are known in European and American populations.
- Replication studies are crucial to validate genetic associations across diverse populations.
Purpose of the Study:
- To replicate previously identified VTE-associated SNPs in a Brazilian multicenter case-control study.
- To investigate the influence of population genetic structure on VTE risk association studies in Brazil.
Main Methods:
- A multicenter case-control study was conducted in Brazil's Southeast region.
- 29 VTE-associated SNPs and 90 additional SNPs for stratification were genotyped in 436 cases and 430 controls.
- Logistic regression and AMOVA were used for association and genetic structure analyses, with Bonferroni correction.
Main Results:
- The study achieved 79.4% statistical power to detect genetic associations.
- Analysis of 29 SNPs revealed no significant association with VTE in the Brazilian population.
- AMOVA indicated 0.0% genetic variability between cases and controls, with 100% within groups.
Conclusions:
- This Brazilian study failed to replicate known VTE-associated SNPs.
- High population admixture in Brazil may obscure or alter genetic associations observed in other populations.
- Population-specific genetic structures are critical considerations for genetic association studies.
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