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静磁场对镉毒性的影响:大鼠组织中氧化应激和DNA损伤的研究。

Influence of static magnetic field on cadmium toxicity: study of oxidative stress and DNA damage in rat tissues.

作者信息

Amara Salem, Abdelmelek Hafedh, Garrel Catherine, Guiraud Pascale, Douki Thierry, Ravanat Jean-Luc, Favier Alain, Sakly Mohsen, Ben Rhouma Khémais

机构信息

Laboratoire de Physiologie Intégrée Faculté des Sciences de Bizerte, 7021 Jarzouna, Tunisia.

出版信息

J Trace Elem Med Biol. 2006;20(4):263-9. doi: 10.1016/j.jtemb.2006.07.002. Epub 2006 Sep 28.

Abstract

In the present study, we investigated the effect of co-exposure to static magnetic field (SMF) and cadmium (Cd) on the biochemical parameters, antioxidant enzymes activity and DNA damage in rat tissues. Animals were treated with cadmium (CdCl(2), 40mg/L, per os) in drinking water during 4 weeks. Cd treatment induced an increase of plasma lactate dehydrogenase (LDH) and transaminases levels. Moreover, Cd treatment increased malondialdehyde (MDA) and 8-oxodGuo levels in rat tissues. However, the antioxidant enzymes activity such as the glutathione peroxidase (GPx), catalase (CAT) and the superoxide dismutase (SOD) were decreased in liver and kidney, while we noted a huge increase of hepatic and renal cadmium content. Interestingly, the combined effect of SMF (128mT, 1h/day during 30 consecutive days) and Cd (40mg/L, per os) decreased the GPx and CAT activities in liver compared to cadmium treated group. However, the association between SMF and Cd failed to alter transaminases, MDA and 8-oxodGuo concentration. Cd treatment altered antioxidant enzymes and DNA in liver and kidney of rats. Moreover, SMF associated to Cd disrupt this antioxidant response in liver compared to Cd-treated rats.

摘要

在本研究中,我们调查了同时暴露于静磁场(SMF)和镉(Cd)对大鼠组织生化参数、抗氧化酶活性及DNA损伤的影响。动物在4周内饮用含镉(CdCl₂,40mg/L,经口)的水。镉处理导致血浆乳酸脱氢酶(LDH)和转氨酶水平升高。此外,镉处理使大鼠组织中丙二醛(MDA)和8-氧代脱氧鸟苷(8-oxodGuo)水平增加。然而,肝脏和肾脏中的抗氧化酶活性,如谷胱甘肽过氧化物酶(GPx)、过氧化氢酶(CAT)和超氧化物歧化酶(SOD)降低,同时我们注意到肝脏和肾脏中镉含量大幅增加。有趣的是,与镉处理组相比,静磁场(128mT,连续30天每天1小时)和镉(40mg/L,经口)的联合作用降低了肝脏中的GPx和CAT活性。然而,静磁场与镉的联合作用未能改变转氨酶、MDA和8-oxodGuo的浓度。镉处理改变了大鼠肝脏和肾脏中的抗氧化酶及DNA。此外,与镉处理的大鼠相比,与镉相关的静磁场破坏了肝脏中的这种抗氧化反应。

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