数字农科院2.0

Identification of imprinted genes in the skeletal muscle of newborn piglets by high-throughput sequencing

文献类型： 外文期刊

作者： Hou, Xinhua;Wang, Zishuai;Shi, Liangyu;Wang, Ligang;Zhao, Fuping;Liu, Xin;Gao, Hongmei;Shi, Lijun;Yan, Hua;Wang, Lixian;Zhang, Longchao

作者机构：

关键词： DNA-seq;imprinted gene;pig;RNA-seq;skeletal muscle

期刊名称： ANIMAL GENETICS

ISSN： 0268-9146

年卷期： 2022 年

页码：

收录情况： SCIE（2022版）

摘要： Imprinted genes - exhibiting parent-specific transcription - play essential roles in the process of mammalian development and growth. Skeletal muscle growth is crucial for meat production. To further understand the role of imprinted genes during the porcine skeletal muscle growth, DNA-seq and RNA-seq were used to explore the characteristics of imprinted genes from porcine reciprocal crosses. A total of 584 545 single-nucleotide variations were discovered in the DNA-seq data of F0 parents, heterozygous in two pig breeds (Yorkshire and Min pigs) but homozygous in each breed. These single-nucleotide variations were used to determine the allelic-specific expression in F1 individuals. Finally, eight paternal expression sites and three maternal expression sites were detected, whereas two paternally expressed imprinted genes (NDN and IGF2) and one maternally expressed imprinted gene (H1-3) were validated by Sanger sequencing. DNA methylation regulates the expression of imprinted genes, and all of the identified imprinted genes in this study were predicted to possess CpG islands. PBX1 and YY1 binding motifs were discovered in the promoter regions of all three imprinted genes, which were candidate elements regulating the transcription of imprinted genes. For these identified imprinted genes, IGF2 and NDN promoted muscle growth whereas H1-3 inhibited cell proliferation, corroborating the 'parental conflict' theory that paternally expressed imprinted genes assisted descendants' growth whereas maternally expressed imprinted genes inhibited it. This study discovered porcine imprinted genes in skeletal muscle and was the first to reveal that H1-3 was expressed by the maternal allele to our knowledge. Our findings provided valuable resources for the potential utilization of imprinted genes in pig breeding.

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