期刊
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
卷 9, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fcell.2021.678665
关键词
Cu; ROS; oocyte quality; cytoskeleton; mitochondrial function
资金
- Natural Science Foundation of Jiangsu Province [BK20190531]
- Fundamental Research Funds for the Central Universities [KJQN202037]
- China Postdoctoral Science Foundation [2019M651849]
Excessive copper exposure negatively impacts the maturation and organelle functions of porcine oocytes, disrupting spindle structure, altering actin dynamics and cortical granule distribution. It also affects mitochondrial function, leading to increased oxidative stress, DNA damage, and apoptosis in the oocytes, ultimately reducing oocyte quality.
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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