Title:Association of Val16Ala Polymorphism of Manganese Superoxide Dismutase
(MnSOD) with Food Intake and Cardiometabolic Risk Factors in
the Elderly in Primary Care in Porto Alegre
Volume: 15
Issue: 1
Author(s): Maria G.V. Gottlieb*, Cristiane A. Borges, Vera E. Closs, Raquel Seibel, Rodolfo H. Schneider, Carla H. Schwanke and Irenio Gomes
Affiliation:
- Graduate Program in Biomedical Gerontology, School of Medicine, Pontifícia Universidade Católica do Rio Grande
do Sul, Porto Alegre, Brazil
Keywords:
Aging, superoxide dismutase, genetic polymorphism, inflammation, food consumption, energy metabolism.
Abstract: Background: The aging process causes physiological changes on its own. The combination
of an unhealthy lifestyle with the presence of genetic polymorphisms, such as the Val16Ala of
the antioxidant enzyme manganese-dependent superoxide dismutase (MnSOD) may contribute to a
greater occurrence of cardiometabolic risk factors.
Objective: This study aimed to verify the association of Val16Ala-MnSOD polymorphism with
food intake, caloric expenditure, and cardiometabolic risk factors in the elderly.
Methods: A cross-sectional study with a sample size of 270 elderly individuals assisted in primary
health care in the city of Porto Alegre, RS, Brazil. Val16Ala polymorphism, glucose, lipid profile,
insulin, HOMA-IR, blood pressure, waist circumference, PCR-us, IL-6, food consumption, and caloric
expenditure were evaluated.
Results: The average age of the elderly was 68.6 ± 7.6 years. There were statistically significant
differences regarding the consumption of two or more servings of fruits and vegetables daily between
the elderly VV versus AV (P=0.017). There were also statistically significant differences regarding
the consumption of two or more daily servings of legumes and eggs between the elderly
AA versus VV (P=0.002). The median of insulin was higher in the elderly AA versus AV
(P=0.025) and the median of HOMA-IR was higher in the elderly VV versus AV (P=0.029). AA
elderly individuals had higher means of high-density lipoprotein (HDL-c), compared to AV
(P=0.029).
Conclusion: The results suggest that Val16Ala -MnSOD polymorphism is associated with the consumption
of fruits, vegetables, legumes, and eggs, as well as with cardiometabolic risk factors in
the elderly.