Correlation between serum retinol and alpha-tocopherol levels in centenarians.

Area of Science:

• Gerontology
• Nutritional Science
• Biochemistry

Background:

• Longevity is associated with robust defense mechanisms against oxidative stress and disease.
• Centenarians exemplify successful aging, offering insights into maintaining health in extreme old age.
• Vitamins A and E are key nonenzymatic antioxidants crucial for cellular protection.

Purpose of the Study:

• To assess serum levels of vitamin A (retinol) and vitamin E (alpha-tocopherol) in healthy centenarians.
• To investigate the correlation between serum vitamin A and vitamin E concentrations in centenarians.
• To compare these findings with younger and older control groups.

Main Methods:

• Serum samples were collected from 16 healthy centenarians and two control groups.
• Concentrations of retinol and alpha-tocopherol were measured using standard laboratory assays.
• Statistical analysis, including correlation (Rho) and significance (p-value), was performed.

Main Results:

• Centenarians exhibited normal serum levels of retinol (450.9 +/- 240.3 ng/mL) and alpha-tocopherol (9220.2 +/- 3410.9 ng/mL).
• A significant direct correlation was found between vitamin A and vitamin E in centenarians (Rho = 0.715, p = 0.0056).
• This correlation was also significant in younger controls but absent in older controls.

Conclusions:

• Preserved normal levels of vitamins A and E may contribute to protection against oxidative stress in centenarians.
• The observed correlation between these vitamins in centenarians suggests a synergistic role in maintaining health.
• These findings support the hypothesis that adequate antioxidant status is vital for achieving extreme longevity.