Vitamin C and E intake is associated with increased paraoxonase activity

Area of Science:

• Biochemistry
• Cardiovascular Science
• Nutritional Science

Background:

• Paraoxonase (PON1) is an enzyme linked to high-density lipoprotein (HDL) that protects against low-density lipoprotein (LDL) oxidation.
• PON1 activity is largely genetically determined but can be modified by environmental factors and predicts vascular disease risk.
• Dietary antioxidants like vitamins C and E may influence PON1 activity by scavenging free radicals.

Purpose of the Study:

• To investigate the relationship between dietary intake of vitamins C and E and PON1 activity.
• To understand environmental influences on PON1 activity beyond genetic control.

Main Methods:

• A food frequency survey was used to estimate vitamin C and E intake in 189 male subjects.
• Linear regression analysis was employed to determine predictors of PON1 activity.
• Covariates, smoking status, and statin use were analyzed as independent variables.

Main Results:

• Vitamin C and E intake were significant positive predictors of PON1 activity for both paraoxon and diazoxon hydrolysis.
• Smoking and statin use were identified as independent predictors of PON1 activity.
• These findings suggest environmental factors significantly modulate PON1 activity.

Conclusions:

• PON1 activity is influenced by genotype, antioxidant vitamin intake, smoking, and statin use.
• Environmental factors play a crucial role in modulating PON1 activity.
• Further research into environmental influences and genetic variants of PON1 is warranted due to its predictive value for vascular disease.