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Genetic risk factors in acute coronary disease
1Center of Thrombosis, Haemostasis and Vascular Biology, Molecular Biology Unit, Department of Transfusion Medicine and Blood Bank, Hospital S. João, Porto, Portugal. sih@ip.pt
Insights
Common genetic factors like Factor V Leiden and MTHFR mutations do not appear to increase acute coronary disease risk in Portuguese patients. However, the PI(A2) polymorphism may play a role in disease development.
Area of Science:
- Cardiovascular Genetics
- Thrombophilia
Background:
- Acute coronary disease (ACD) encompasses myocardial infarction and unstable angina, significant causes of morbidity and mortality.
- Genetic predisposition is increasingly recognized as a contributing factor in thrombotic disorders and cardiovascular diseases.
Purpose of the Study:
- To investigate the association between specific genetic variants (HPA-1, Factor V Leiden, Prothrombin 20210 variant, and MTHFR mutation) and the risk of acute coronary disease in a Portuguese population.
- To explore the potential role of the PI(A2) polymorphism in the pathogenesis of ACD.
Main Methods:
- A case-control study involving 100 blood donors (controls) and 52 patients diagnosed with myocardial infarction or unstable angina.
- Genotyping for HPA-1, Factor V Leiden, Prothrombin 20210 variant, and MTHFR mutation was performed on all participants.
Main Results:
- Prevalence of Factor V Leiden, Prothrombin 20210 variant, and MTHFR mutation was similar in both controls and patients, suggesting they are not significant risk factors for ACD.
- A statistically significant difference in the PI(A2) polymorphism frequency was observed between controls and patients, particularly in those under 60 years old.
- The study suggests that the PI(A2) polymorphism might be associated with the pathogenesis of acute coronary disease.
Conclusions:
- Factor V Leiden, Prothrombin 20210 variant, and MTHFR mutations do not appear to be independent risk factors for acute coronary disease in the studied Portuguese cohort.
- The PI(A2) polymorphism warrants further investigation for its potential role in ACD development.
- The cumulative effect of multiple genetic factors may influence the incidence and outcomes of myocardial infarction and unstable angina, necessitating larger studies for comprehensive understanding.
Objective:
We investigate whether each of the following: HPA-1, Factor V Leiden, prothrombin gene variant and the methylene tetrahydrofolate reductase gene (MTHFR) mutation, are risk factors for acute coronary disease in Portuguese patients.
Material And Methods:
100 blood donors and 52 patients with an established diagnosis of myocardial infarction or unstable angina were evaluated for genetic risk factors, by determining HPA-1 genotype, Factor V Leiden, Prothrombin 20210 variant and MTHFR mutation.
Results:
We found a prevalence of 2.0% for Factor V Leiden, 5.0% for the Prothrombin 20210 variant and 66% for the MTHFR mutation in blood donors. These values are similar to those found in the patients (1.9, 3.8 and 58%, respectively). We found that 28/100 controls had the PI(A2) polymorphism, a frequency statistically different from that in the patients (23/52). This difference was even more pronounced in patients less than 60 years old (27/96 vs. 13/24).
Conclusion:
Factor V Leiden, Prothrombin 20210 variant and MTHFR mutation do not seem to represent risk factors for acute coronary disease. However, the PI(A2) polymorphism could have a role in the pathogenesis of this disease. The presence of multiple genetic factors, more than single ones, could influence the development and outcome of myocardial infarction and unstable angina. Larger studies are needed in order to have a better insight into the pathophysiological mechanisms of this disease, along with its prevention and the development of new treatments.