文献类型： 外文期刊

作者： Chen Ying ¹ ; Wu Yangsheng ² ; Lin Jiapeng ² ; Wang Liqin ² ; Li Xiaolin ¹ ; Liu Mingjun ¹ ; Huang Juncheng ² ;

作者机构： 1.Shihezi Univ, Coll Anim Sci & Technol, Shihezi, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Genet Breeding & Reprod Grass Feeding Liv, Urumqi, Peoples R China

3.Key Lab Anim Biotechnol Xinjiang, Urumqi, Peoples R China

4.Xinjiang Acad Anim Sci, Inst Biotechnol, Urumqi, Peoples R China

关键词： competence; in vitro maturation; oocyte; ovine; RNA‐ seq

期刊名称：REPRODUCTION IN DOMESTIC ANIMALS （ 影响因子：2.005； 五年影响因子：2.154 ）

ISSN： 0936-6768

年卷期： 2021 年 56 卷 8 期

页码：

收录情况： SCI

摘要： Pre-pubertal females produce more oocytes than adult individuals, but the ability of oocytes to undergo embryonic development and produce viable offspring is less in pre-pubertal animals than in adult animals. Oocyte quality is associated with abnormal gene expression. To date, the transcriptome profiles of 1-month-old lamb oocytes after in vitro maturation (IVM) are poorly reported. This study aimed to identify differentially expressed genes (DEGs) in lamb oocytes with varying competencies, affecting oocyte competence. Using RNA sequencing (RNA developmental -seq) technology, the transcriptome profiles of 1-month-old lamb oocytes after IVM were assessed, and oocytes from adult sheep large follicles were used as controls. We found 11 up-regulated and 39 down-regulated DEGs in lamb oocytes. Gene Ontology analysis of DEGs showed that molecular functions were clustered in catalytic and binding activities, while biological processes were clustered in metabolic process, cellular process, single-organism process and biological regulation. Kyoto Encyclopedia of Genes and Genomes analysis showed that the DEGs were involved in oxidative phosphorylation, transforming growth factor-beta signalling pathway, or DNA replication. In lamb MII oocytes, down-regulation of oxidative phosphorylation genes (ATP5E, NDUFA7 and COX6C), thiol protease inhibitor (CSTB) and 26S proteasome component (SHFM1) and up-regulation of CUL1, MARCH7 and TRIM17 might cause low competence of lamb embryos. In conclusion, this study provided detailed information on mRNA transcriptomes in lamb oocytes after IVM, which offers insights into the reduced developmental potential of lamb oocytes.