PROC, PROCR and PROS1 polymorphisms, plasma anticoagulant phenotypes, and risk of cardiovascular disease and mortality in older adults: the Cardiovascular Health Study
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Published on: May 23, 2025
A P Reiner1, C L Carty, N S Jenny
1Department of Epidemiology, University of Washington, Seattle, WA 98195, USA. apreiner@u.washington.edu
Insights
A common PROCR gene variant is linked to reduced healthy survival in older adults, but not directly to heart disease or stroke risk. Further research is needed to understand its role in aging and vascular disorders.
Area of Science:
- Genetics and Molecular Biology
- Cardiovascular Disease Research
- Aging Research
Background:
- Genes regulating protein C anticoagulant pathways are implicated in aging-related disorders and atherothrombosis.
- Understanding genetic contributions to these pathways is crucial for disease prevention and treatment.
Purpose of the Study:
- To investigate the association between common polymorphisms in PROC, PROS1, and PROCR genes and protein C, protein S, and soluble EPCR levels.
- To examine the relationship between these genetic variants and the risk of incident coronary heart disease, stroke, and mortality.
Main Methods:
- Utilized a tagSNP approach with data from the Cardiovascular Health Study (CHS).
- Assessed associations between polymorphisms and plasma levels of protein C, protein S, and soluble EPCR in 336 participants.
- Evaluated associations with incident clinical outcomes (CHD, stroke, mortality) in 4547 participants.
Main Results:
- The PROCR Ser219Gly polymorphism (rs867186) strongly correlated with higher soluble EPCR and protein C antigen levels.
- An IL10 polymorphism was linked to increased free protein S levels.
- A different PROCR tagSNP (rs2069948) was associated with increased stroke risk, mortality, and decreased healthy survival.
Conclusions:
- A common PROCR variant may be associated with reduced healthy survival in older adults.
- The PROCR Ser219Gly variant did not show an association with CHD, stroke, or mortality risk.
- Further investigation into PROCR variants is warranted for their role in ischemic and aging-related disorders.
Background And Objectives:
Genes encoding protein C anticoagulant pathways are candidates for atherothrombotic and other aging-related disorders.
Methods:
Using a tagSNP approach, and data from the Cardiovascular Health Study (CHS), we assessed associations of common polymorphisms of PROC, PROS1 and PROCR with: (i) plasma protein C, soluble protein C endothelial receptor (sEPCR) and protein S levels measured in a subsample of 336 participants at study entry; and (ii) risk of incident clinical outcomes [coronary heart disease (CHD), stroke, and mortality] in 4547 participants during follow-up. Secondarily, we explored associations between plasma protein C, protein S and sEPCR levels and other candidate genes involved in thrombosis, inflammation, and aging.
Results:
The PROCR Ser219Gly polymorphism (rs867186) was strongly associated with higher sEPCR levels, explaining 75% of the phenotypic variation. The PROCR Ser219Gly variant was also associated with higher levels of circulating protein C antigen. An IL10 polymorphism was associated with higher free protein S levels. The minor alleles of PROC rs2069901 and PROS1 rs4857343 were weakly associated with lower protein C and free protein S levels, respectively. There was no association between PROCR Ser219Gly and risk of CHD, stroke, or mortality. The minor allele of another common PROCR tagSNP, rs2069948, was associated with lymphoid PROCR mRNA expression and with increased risk of incident stroke and all-cause mortality, and decreased healthy survival during follow-up.
Conclusions:
A common PROCR variant may be associated with decreased healthy survival in older adults. Additional studies are warranted to establish the role of PROCR variants in ischemic and aging-related disorders.
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