apoE4 allele and the natural history of cardiovascular risk factors

Area of Science:

• Cardiovascular Science
• Genetics
• Aging Research

Background:

• Cardiovascular disease (CVD) risk is influenced by genetic factors.
• The apolipoprotein E4 (apoE4) allele is a known genetic risk factor for CVD.
• Longitudinal changes in cardiovascular risk factors are crucial for understanding disease progression.

Purpose of the Study:

• To compare longitudinal changes in cardiovascular risk factors between men with and without the apoE4 allele.
• To investigate the impact of the apoE4 allele on traditional cardiovascular risk factors over time.
• To explore the relationship between apoE4 and age-related changes in metabolic and hemodynamic parameters.

Main Methods:

• Analysis of data from 306 men in the Baltimore Longitudinal Study of Aging (BLSA).
• Repeated measurements of cardiovascular risk factors (blood pressure, BMI, lipids, glucose) over a median follow-up of 7 years.
• Linear mixed-effects models used to analyze longitudinal changes and the effect of the apoE4 allele.

Main Results:

• The prevalence of the apoE4 allele was 25.5% in the study cohort.
• The apoE4 allele was significantly associated with accelerated longitudinal increases in fasting plasma glucose (+9.5% over 10 years in the 6th decade).
• No significant association was found between apoE4 and longitudinal changes in blood pressure, BMI, total/HDL-cholesterol, or triglycerides.

Conclusions:

• The apoE4 genotype significantly influences longitudinal changes in fasting plasma glucose.
• Accelerated glucose changes associated with apoE4 may contribute to the elevated CVD risk observed in carriers.
• Further research is warranted to elucidate the mechanisms linking apoE4, glucose metabolism, and cardiovascular outcomes.