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Exposure to Copper Compromises the Maturational Competency of Porcine Oocytes by Impairing Mitochondrial Function

文献类型： 外文期刊

作者： Chen, Jingyue 1 ; Cui, Zhaokang 1 ; Qiu, Yawei 2 ; Zhang, Xingxing 2 ; Chen, Fang 2 ; Wang, Huili 3 ; Xiong, Bo 1 ; Miao, 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Anim Sci & Technol, Nanjing, Peoples R China

2.Nanjing Agr Univ, Coll Vet Med, Nanjing, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Anim Sci, Nanjing, Peoples R China

关键词： Cu; ROS; oocyte quality; cytoskeleton; mitochondrial function

期刊名称：FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY （ 影响因子：6.684； 五年影响因子：7.219 ）

ISSN： 2296-634X

年卷期： 2021 年 9 卷

页码：

收录情况： SCI

摘要： Copper (Cu) is an essential trace element for animals, and also an important nutritional component for the normal physiology and metabolism of animal reproductive systems. An excess or lack of Cu will directly or indirectly affect animal reproductive activities. However, the effect of Cu, in particular excessive Cu, on the reproductive performance of sows has not been studied. Here, we report that excessive Cu had negative effects on oocyte maturation and organelle functions. We showed that Cu exposure perturbed porcine oocyte meiotic maturation and impaired spindle/chromosome structure, resulting in a defective spindle assembly, as well as the abnormal distribution of actin dynamics and cortical granules. In addition, single-cell transcriptome analysis identified the target effectors of Cu actions in porcine oocytes, further demonstrating that Cu exposure affects the mitochondrial distribution and function, leading to the high levels of reactive oxygen species, DNA damage, and early apoptosis of porcine oocytes. These findings demonstrate that Cu exposure causes abnormalities in the mitochondrial distribution and function, resulting in the increased oxidative stress and levels of reactive oxygen species, DNA damage, and apoptosis, ultimately leading to a decreased porcine oocyte quality.

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