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Effect of long-term Se deficiency on the antioxidant capacities of rat vascular tissue

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Abstract

Selenium (Se) is an essential micronutrient in human health and Se deficiency has been incriminated in the etiology of cardiovascular diseases. However, the effect of long-term Se deficiency on the antioxidant capacities of vascular tissue has not been elucidated. This study was to determine whether long-term Se deficiency might affect the antioxidant capacity of rat vascular tissue and whether the diet Se might affect the activities of glutathione peroxidase (GPx) and thioredoxin reductase (TR) in rat vascular tissue. Weanling male Wister rats were fed Se-deficient and Se-adequate diets for 12 mo. Se was supplemented in drinking water (1 µg Se/mL) for 1 mo. The arterial walls isolated from various groups were used in the assay. In comparison with the control, Se-deficient rats exhibited significant decreases of GPx activity and total antioxidant capacity in the arterial wall. Similar decreases appeared in the heart, liver, and kidney. The superoxide dismutase activity was also decreased in the Se-deficient rat’s arterial wall. Followed by Se supplementation, they were restored to different extent. TR activity was decreased in the heart, liver, and kidney, but increased in the arterial wall. The content of malondialdehyde was increased markedly in Se-deficient rats. In conclusion, a positive correlation exists between dietary Se and antioxidant capacity of rat vascular tissue except TR. It seems that the activities of GPx and TR in the rat arterial wall were mediated in different pathways by the Se status.

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  1. Department of Chemistry, Huazhong University of Science and Technology, 430074, Wuhan, Hubei, People’s Republic of China

    Qingzhi Wu & Kaixun Huang

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  1. Qingzhi Wu
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  2. Kaixun Huang
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Wu, Q., Huang, K. Effect of long-term Se deficiency on the antioxidant capacities of rat vascular tissue. Biol Trace Elem Res 98, 73–84 (2004). https://doi.org/10.1385/BTER:98:1:73

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  • DOI: https://doi.org/10.1385/BTER:98:1:73

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