Abstract
Serum carotenoids, tocopherols and retinol were analyzed in patients with sickle cell anemia (SCA) and in control subjects. The data show the following: the serum levels of the major carotenoids, alpha and beta carotene, cryptoxanthin, lycopene lutein, alpha tocopherol and retinol were significantly lower in SCA patients. These findings reflect an additional abnormality of the antioxidant system in SCA patients. Gamma tocopherol, on the other hand, was significantly elevated, consistent with the previously reported reciprocal relationship between serum alpha and gamma tocopherols. Thus, these data taken together with the earlier findings on the lower levels of plasma alpha tocopherol and ascorbic acid suggest that the entire antioxidant system may be compromised in SCA patients. This may contribute in part to the phenotypic expression of the condition.
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