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Hypertension is the leading contributor to cardiovascular disease worldwide; the prevalence of hypertension is higher among black adults than other racial/ethnic groups. One of the cellular defense mechanisms against reactive oxygen species are the antioxidants, such as the enzyme superoxide dismutase (SOD). Therefore, this study aimed to analyze the influence of the SNP Val16Ala of the SOD2 gene on oxidative stress and hypertension in a community population of self-declared black individuals in southern Brazil. The 158 participants declared themselves black (black/brown) regarding their skin color, being 89 (56.3%) self-declared black and 69 (43.7%) brown. A real-time polymerase chain reaction determined the MnSOD Ala16Val polymorphism, and oxidative stress marker levels were significant, in addition to differences in the hypertensive group regarding the levels of carbonyl ( p  = .016), thiobarbituric acid reactive substances ( p  = .040), ischemia-modified albumin ( p  = .046), total antioxidant capacity ( p  = .011), and Nitric oxide metabolites ( p  = .029). The SOD Val/Val genotype was considered a risk factor regardless of the other variables for hypertension ( p  = .034). The Val16Ala polymorphism of the MnSOD gene presented an association with hypertension

The Val16Ala MnSOD gene polymorphism is associated with hypertension in self-declared black individuals