Seafood Selenium in Relation to Assessments of Methylmercury Exposure Risks
Seafood Selenium in Relation to Assessments of Methylmercury Exposure Risks
复制标题
海鲜硒与甲基汞暴露风险评估的关系
DOI:
10.1007/978-1-4614-1025-6_31
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发表时间:
2011
期刊:
影响因子:
6.9
通讯作者:
N. Ralston
中科院分区:
文献类型:
--
作者:
L. Raymond;L. Seale;N. Ralston
Selenium, an important nutrient present in many foods and especially abundant in ocean fish, is known to counteract mercury toxicity. This effect has been attributed to the high-binding affinities between mercury and selenium, whereby selenium was assumed to sequester mercury and thus prevent its harmful effects. However, recent research indicates that methylmercury is a highly specific irreversible inhibitor of selenium-dependent enzymes (selenoenzymes). Therefore, selenium may not act as a “tonic” that sequesters mercury, but may instead be the “target” of mercury binding which inhibits essential selenoenzyme functions. Since methylmercury readily crosses the placental and blood–brain barriers, its affinity for selenium enables it to impair synthesis and activities of selenoenzymes that are required for healthy fetal brain development. Effects of high methylmercury exposures depend on dietary selenium intakes and selenium status.
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影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
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