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
复制
发表时间:
2011
期刊:
影响因子:
6.9
通讯作者:
N. Ralston
N. Ralston
中科院分区:
医学2区
文献类型:
--
作者:
L. Raymond;L. Seale;N. Ralston

文献摘要

参考文献

被引文献

相似文献

硒是许多食物中的一种重要营养素,特别是在海鱼中含量丰富,众所周知,它可以抵消汞毒性。这种效应归因于汞和硒之间的高结合亲和力,即认为硒可以隔离汞,从而防止其有害影响。然而,最近的研究表明,甲基汞是一种高度特异的硒依赖酶(硒酶)的不可逆抑制物。因此,硒可能不会起到隔离汞的“补药”的作用,而可能是汞结合的“靶子”,而汞结合会抑制基本的硒酶功能。由于甲基汞很容易穿过胎盘和血脑屏障,它对硒的亲和力使其能够损害胎儿大脑健康发育所需的硒酶的合成和活性。高甲基汞暴露的影响取决于膳食中的硒摄入量和硒的状况。
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.
妊娠期甲基汞和硒暴露:对成年期空间歧视逆转的影响。
DOI: 10.1016/j.neuro.2006.03.022
发表时间: 2006
期刊: Neurotoxicology
影响因子: 3.4
作者:
Reed,MirandaN;Paletz,ElliottM;Newland,MChristopher
通讯作者: Newland,MChristopher
DOI: 10.1016/j.bbagen.2006.08.010
发表时间: 2006-12-01
影响因子: 3
作者:
Burk, Raymond F.;Hill, Kristina E.;Norsworthy, Brooke K.
通讯作者: Norsworthy, Brooke K.
DOI: 10.1210/edrv.23.1.0455
发表时间: 2002-02
期刊: Endocrine reviews
影响因子: 20.3
作者:
A. Bianco;D. Salvatore;B. Gereben;Marla J. Berry;P. Larsen
通讯作者: A. Bianco;D. Salvatore;B. Gereben;Marla J. Berry;P. Larsen
DOI: 10.1016/j.bbagen.2009.03.026
发表时间: 2009-11
影响因子: 3
作者:
Burk, Raymond F.;Hill, Kristina E.
通讯作者: Hill, Kristina E.
DOI: 10.1016/j.ntt.2007.10.003
发表时间: 2008
影响因子: 2.9
作者:
Reed,MirandaN;Banna,KellyM;Donlin,WendyD;Newland,MChristopher
通讯作者: Newland,MChristopher