Epigenetic Modification Agents Improve Genomic Methylation Reprogramming in Porcine Cloned Embryos
文献类型: 外文期刊
作者: Huan, Yan Jun 1 ; Zhu, Jiang 2 ; Wang, Hong Mei 1 ; Wu, Zhan Feng 4 ; Zhang, Ji Guang 4 ; Xie, Bing Teng 2 ; Li, Jing 1 ;
作者机构: 1.Shandong Acad Agr Sci, Dairy Cattle Res Ctr, Jinan 250100, Peoples R China
2.Northeast Agr Univ, Coll Life Sci, Haerbin 150030, Peoples R China
3.Shandong Agr Univ, Coll Anim Sci & Vet Med, Tai An 271018, Shandong, Peoples R China
4.Shouguang City Hosp Chinese Med, Weifang 262700, Peoples R China
关键词: DNA methylation;Epigenetic modification agents;Pig;Reprogramming;Somatic cell nuclear transfer
期刊名称:JOURNAL OF REPRODUCTION AND DEVELOPMENT ( 影响因子:2.214; 五年影响因子:2.221 )
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收录情况: SCI
摘要: Incomplete DNA methylation reprogramming in cloned embryos leads to low cloning efficiency. Our previous studies showed that the epigenetic modification agents 5-aza-2'-deoxycytidine (5-aza-dC) or trichostatin A (TSA) could enhance the developmental competence of porcine cloned embryos. Here, we investigated genomic methylation dynamics and specific gene expression levels during early embryonic development in pigs. In this study, our results showed that there was a typical wave of DNA demethylation and remethylation of centromeric satellite repeat (CenRep) in fertilized embryos, whereas in cloned embryos, delayed demethylation and a lack of remethylation were observed. When cloned embryos were treated with 5-aza-dC or TSA, CenRep methylation reprogramming was improved, and this was similar to that detected in fertilized counterparts. Furthermore, we found that the epigenetic modification agents, especially TSA, effectively promoted silencing of tissue specific genes and transcription of early embryo development-related genes in porcine cloned embryos. In conclusion, our results showed that the epigenetic modification agent 5-aza-dC or TSA could improve genomic methylation reprogramming in porcine cloned embryos and regulate the appropriate expression levels of genes related to early embryonic development, thereby resulting in high developmental competence.
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