In Vitro Effect of Copper Chloride Exposure on Reactive Oxygen Species Generation and Respiratory Chain Complex Activities of Mitochondria Isolated from Broiler Liver

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• 作者：Rongsheng Su (1)
  Rongmei Wang (2)
  Shining Guo (1)
  Huabin Cao (3)
  Jiaqiang Pan (1)
  Chengmei Li (1)
  Dayou Shi (1)
  Zhaoxin Tang (1)
  
• 关键词：Copper chloride (CuCl2) ; Reactive oxygen species ; Respiratory chain complexes ; Free radicals ; Membrane potential
• 刊名：Biological Trace Element Research
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：144
• 期：1-3
• 页码：668-677
• 全文大小：132KB
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• 作者单位：Rongsheng Su (1)
  Rongmei Wang (2)
  Shining Guo (1)
  Huabin Cao (3)
  Jiaqiang Pan (1)
  Chengmei Li (1)
  Dayou Shi (1)
  Zhaoxin Tang (1)
  
  1. College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
  2. College of Ying Dong Bioengineering, Shaoguan University, Shaoguan, 510042, China
  3. College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, 330045, China
  

文摘

This study is to examine if Cu2+ can act directly on mitochondria or indirectly by producing reactive oxygen species (ROS), isolated broiler hepatic mitochondria were exposed to different concentrations of Cu2+ (10, 30, 50?μM). Respiratory chain complex activities, ROS generation, respiratory control ratio (RCR) and mitochondrial membrane potential were investigated. Dose-dependent inhibition of respiratory chain complexes and induction of ROS were observed, which coincided with decreasing RCR both with glutamate-?malate or succinate. Further investigation indicated that the membrane potential determined by rhodamine 123 release decreased after CuCl2 exposure at 30 and 50?μM. In addition, the effects of the antioxidants NAC (200?μM) and GSH (200?μM) were studied at 50?μM Cu2+. The results indicate that Cu can induce mitochondrial dysfunction in excessive dose and the effect of Cu2+ exposure on respiratory chain is not site-specific, and antioxidants can protect the mitochondrial function by reducing the formation of free radicals.