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Serum vitamin C concentration is influenced by haptoglobin polymorphism and iron status in Chinese. | LitMetric

AI Article Synopsis

Article Abstract

Background: Vitamin C is a powerful antioxidant (free radical scavenger). Apart from the diet, other factors regulating its catabolism may affect its serum concentration. Haptoglobin (Hp) is a plasma protein participating in iron metabolism. It shows a genetic polymorphism which shows marked geographical differences. We investigated the relationship between vitamin C, iron status and haptoglobin polymorphism in Chinese men and women.

Methods: Iron status markers were compared according to Hp phenotypes determined by chemiluminescence detection in 110 healthy Chinese subjects. The concentration of haptoglobin was determined using an immunoturbidimetric method. Serum vitamin C was tested by a 2,4-dinitrophenylhydrazine based method.

Results: In Chinese, the haptoglobin phenotype distribution was 10.0% Hp 1-1, 33.6% Hp 2-1, and 56.4% Hp 2-2. In the study group, serum vitamin C concentration was associated with haptoglobin type, showing lowest values in serum from Hp 2-2 subjects in males (p=0.028, ANOVA). In contrast to Hp phenotype, Hp concentration did not affect vitamin C concentration. Hp 2-2 shows higher haptoglobin (p=0.002 (ANOVA)) than individuals with the other types. Furthermore, vitamin C was influenced by (log)ferritin levels. In Chinese, vitamin C is influenced by haptoglobin polymorphism and iron status.

Conclusion: The present findings support the role of non-nutritional factors in vitamin C status.

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Source
http://dx.doi.org/10.1016/j.cca.2005.09.015DOI Listing

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