Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (5): 2126-2133.doi: 10.11843/j.issn.0366-6964.2023.05.033

• BASIC VETERINARY MEDICINE • Previous Articles     Next Articles

Preliminary Study on the Location and Function of XRCC1 in Oocyte and Early Embryos

ZHU Jiaqiao1,2,3*, CHENG Laiyang2, CAO Jiangqin2, ZHU Min2, LI Junwei2, JU Huimin2,3, LIU Zongping2,3   

  1. 1. Guangling College of Yangzhou University, Yangzhou 225009, China;
    2. College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China;
    3. Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, China
  • Received:2022-10-14 Online:2023-05-23 Published:2023-05-20

Abstract: XRCC1 is a molecular scaffold protein that plays a central role in the base excision repair pathway. Here, we examined the subcellular localization of XRCC1 and investigated its effects on meiotic maturation of oocytes, subsequent embryonic development, and global DNA methylation in mice. XRCC1 was found to be localized mainly in the nuclei during oocyte maturation and subsequent embryonic development. Blocking XRCC1 by microinjection with antibodies partly reduced oocyte germinal vesicle breakdown (GVBD) and embryo cleavage, and also disrupts DNA demethylation in the 2-cell embryos. The results indicates that XRCC1 is mainly located in the nuclei at the interphase of cell cycle, and XRCC1 with normal function contributes to the maintenance of the quality of mouse oocytes during meiosis and the normal development of early embryos.

Key words: XRCC1, mouse embryo, DNA demethylation, oocyte

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