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CoQ10 improves meiotic maturation of pig oocytes through enhancing mitochondrial function and suppressing oxidative stress
Theriogenology ( IF 2.4 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.theriogenology.2020.10.009
Cai-Xia Yang 1 , Shuai Liu 2 , Jia-Kun Miao 2 , Qiao Mou 2 , Xiao-Man Liu 2 , Pei-Chao Wang 2 , Li-Jun Huo 3 , Zhi-Qiang Du 4
Affiliation  

Coenzyme Q10 (CoQ10) is essential to many fundamental biological processes. However, the effect of CoQ10 on meiotic maturation of pig oocytes still remains elusive. In the present study we aimed to understand the effects of CoQ10 on porcine oocyte maturation, by supplementing different concentrations of CoQ10 (25, 50 and 100 μM) into the maturation medium. We showed that CoQ10 at 50 μM had better capacity to promote the nuclear maturation of pig oocytes derived from both small and large antral follicles. Though the cleavage and blastocyst rates of parthenotes stayed stable, 50 μM CoQ10 treatment could accelerate the development of parthenotes to blastocyst stage, and increase the average cell number of blastocyst. For cumulus-oocyte complexes from large antral follicles categorized by the brilliant cresyl blue (BCB) test, 50 μM CoQ10 treatment could specifically promote the nuclear maturation of poor-quality oocytes in the BCB-negative group. Mitochondrial function of oocytes treated by 50 μM CoQ10 could be boosted, through increasing the levels of mitochondrial membrane potential, ATP production and CoQ6, and changing the pattern of mitochondrial distribution as well. Moreover, 50 μM CoQ10 treatment suppressed the level of reactive oxygen species and reduced the percentage of oocytes with early apoptosis signal. Taken together, CoQ10 could improve the meiotic maturation of pig oocytes, especially for poor-quality oocytes, mainly through enhancing mitochondrial function and suppressing oxidative stress to reduce apoptosis.

中文翻译:

辅酶Q10通过增强线粒体功能和抑制氧化应激来改善猪卵母细胞的减数分裂成熟

辅酶 Q10 (CoQ10) 对许多基本的生物过程至关重要。然而,辅酶Q10对猪卵母细胞减数分裂成熟的影响仍然难以捉摸。在本研究中,我们旨在通过在成熟培养基中补充不同浓度的 CoQ10(25、50 和 100 μM)来了解 CoQ10 对猪卵母细胞成熟的影响。我们发现 50 μM 的 CoQ10 具有更好的能力来促进来自小窦卵泡和大窦卵泡的猪卵母细胞的核成熟。尽管孤雌生殖的卵裂率和囊胚率保持稳定,但 50 μM C​​oQ10 处理可以加速孤雌生殖向囊胚阶段的发展,并增加囊胚的平均细胞数。对于通过亮甲酚蓝 (BCB) 测试分类的大窦卵泡的卵丘-卵母细胞复合物,50 μM C​​oQ10 处理可以特异性促进 BCB 阴性组中劣质卵母细胞的核成熟。50 μM C​​oQ10 处理的卵母细胞的线粒体功能可以通过增加线粒体膜电位、ATP 产生和 CoQ6 的水平以及改变线粒体分布模式来增强。此外,50 μM C​​oQ10 处理抑制了活性氧的水平并降低了具有早期凋亡信号的卵母细胞的百分比。综上所述,辅酶Q10可以促进猪卵母细胞的减数分裂成熟,尤其是劣质卵母细胞,主要是通过增强线粒体功能和抑制氧化应激来减少细胞凋亡。50 μM C​​oQ10 处理的卵母细胞的线粒体功能可以通过增加线粒体膜电位、ATP 产生和 CoQ6 的水平以及改变线粒体分布模式来增强。此外,50 μM C​​oQ10 处理抑制了活性氧的水平并降低了具有早期凋亡信号的卵母细胞的百分比。综上所述,辅酶Q10可以促进猪卵母细胞的减数分裂成熟,尤其是劣质卵母细胞,主要是通过增强线粒体功能和抑制氧化应激来减少细胞凋亡。50 μM C​​oQ10 处理的卵母细胞的线粒体功能可以通过增加线粒体膜电位、ATP 产生和 CoQ6 的水平以及改变线粒体分布模式来增强。此外,50 μM C​​oQ10 处理抑制了活性氧的水平并降低了具有早期凋亡信号的卵母细胞的百分比。综上所述,辅酶Q10可以促进猪卵母细胞的减数分裂成熟,尤其是劣质卵母细胞,主要是通过增强线粒体功能和抑制氧化应激来减少细胞凋亡。50 μM C​​oQ10 处理抑制了活性氧的水平并降低了具有早期凋亡信号的卵母细胞的百分比。综上所述,辅酶Q10可以促进猪卵母细胞的减数分裂成熟,尤其是劣质卵母细胞,主要是通过增强线粒体功能和抑制氧化应激来减少细胞凋亡。50 μM C​​oQ10 处理抑制了活性氧的水平并降低了具有早期凋亡信号的卵母细胞的百分比。综合来看,辅酶Q10可以促进猪卵母细胞的减数分裂成熟,尤其是劣质卵母细胞,主要是通过增强线粒体功能和抑制氧化应激来减少细胞凋亡。
更新日期:2021-01-01
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