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Lipoprotein(a) and prothrombotic effects: Evidence from a genetic association study
Elena Olmastroni1, Julius L Katzmann2, Federica Galimberti3
1Epidemiology and Preventive Pharmacology Service (SEFAP), Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy; IRCCS MultiMedica, Sesto San Giovanni (MI), Italy.
European Journal of Internal Medicine
|February 1, 2025
Summary
Elevated lipoprotein(a) [Lp(a)] is linked to myocardial infarction (MI) risk, but not venous thromboembolism (VTE). This study found no evidence that Lp(a) increases MI risk through prothrombotic effects.
Area of Science:
- Cardiovascular Genetics
- Thrombosis Research
- Lipid Metabolism
Background:
- The role of lipoprotein(a) [Lp(a)] in myocardial infarction (MI) risk is established, yet its prothrombotic contribution remains unclear.
- Investigating the prothrombotic effects of Lp(a) is crucial for understanding its association with cardiovascular disease.
- Lipoprotein(a) is an independent risk factor for atherosclerotic cardiovascular disease.
Purpose of the Study:
- To determine if lipoprotein(a) [Lp(a)] has prothrombotic effects contributing to its association with myocardial infarction (MI) risk.
- To investigate the association of LPA genetic variants and Lp(a) concentrations with venous thromboembolism (VTE) and MI risk.
- To assess whether coagulation pathways modify the relationship between Lp(a) and MI risk.
Main Methods:
- Utilized UK Biobank data from 410,177 participants.
- Examined associations of LPA genetic variants and Lp(a) concentrations with VTE and MI risk.
- Stratified analyses by genetic scores for thrombin (F2/F5) and platelet (GUCY1A3) pathways.
Main Results:
- Neither LPA genetic variants nor Lp(a) concentrations were associated with VTE risk.
- A strong association was observed between higher Lp(a) concentrations and increased MI risk (HR 1.31 per 100 nmol/L).
- The association between Lp(a) and MI risk was not modified by genetic scores influencing coagulation.
Conclusions:
- The link between lipoprotein(a) [Lp(a)] and myocardial infarction (MI) is not mediated by genetically determined coagulation activity.
- Findings do not support a prothrombotic mechanism for Lp(a)-associated MI risk.
- Lp(a) may increase MI risk through non-thrombotic pathways.
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