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Acetylation of H4K12 in porcine oocytes during in vitro aging: potential role of ooplasmic reactive oxygen species

文献类型： 外文期刊

作者： Cui, Mao-Sheng 1 ; Wang, Xian-Long 1 ; Tang, Da-Wei 1 ; Zhang, Jing 1 ; Liu, Yan 2 ; Zeng, Shen-Ming 1 ;

作者机构： 1.China Agr Univ, Lab Anim Embryon Biotechnol, Coll Anim Sci & Technol, Beijing 100193, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Anim Husb & Vet Med, Beijing 100097, Peoples R China

关键词： hydrogen peroxide: 7722-84-1;messenger RNA: mRNA;reactive oxygen species: ROS;7782-44-7;carbonyl cyanide 3-chlorophenylhydrazone: CCCP;555-60-2;histone H4: H4K12;acetylation;lysine 12;oocyte aging;mitochondria' membrane potential

期刊名称：THERIOGENOLOGY （ 影响因子：2.74； 五年影响因子：2.93 ）

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收录情况： SCI

摘要： Deterioration in the quality of mammalian mature oocytes during metaphase-II (M-II) arrest is called "oocyte aging". Although histone acetylation may affect the progression of aging in murine oocytes, the mechanism is unknown. The objective was to determine the role of ooplasmic reactive oxygen species (ROS) in acetylation of histone H4 at lysine 12 (acH4K12) in porcine aged oocytes in vitro. Based on immunostaining with a specific antibody, acetylation of H4K12 in porcine oocytes increased during in vitro aging, which coincided with changing patterns of ooplasmic ROS content. Furthermore, both hydrogen peroxide (H2O2), and the mitochondrial membrane potential disrupter, carbonyl cyanide 3-chlorophenylhydrazone (CCCP), which can moderately elevate oocyte ROS content, significantly increased acetylation levels of H4K12 in porcine oocytes. It was noteworthy that acetylation in the CCCP group was decreased when ROS was counteracted by cysteine, a common antioxidant. In addition, the intracellular mRNA abundance of acetyltransferase gene HAT1 in aged and H2O2 treated oocytes was higher than in M-II phase oocytes, suggesting that HAT I was involved in this reaction. After parthenogenetic activation, a lower proportion of oocytes developed to the blastocyst stage after CCCP or H2O2 treatment when compared with M-II phase oocytes (20 and 0% for CCCP and H2O2 groups, respectively, versus 42% for the M-II group, P < 0.05). In conclusion, elevated levels of H4K12 acetylation were attributed to increased ooplasmic ROS content during porcine oocyte aging in vitro

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