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Updated: Jul 3, 2025
Author Spotlight: Understanding DNA Damage Response in Mammalian Oocytes and Preimplantation Embryos
Published on: June 23, 2023
Distinct characteristics of the DNA damage response in mammalian oocytes
Jiyeon Leem1, Crystal Lee1, Da Yi Choi1
1Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea.
Abstract:
DNA damage is a critical threat that poses significant challenges to all cells. To address this issue, cells have evolved a sophisticated molecular and cellular process known as the DNA damage response (DDR). Among the various cell types, mammalian oocytes, which remain dormant in the ovary for extended periods, are particularly susceptible to DNA damage. The occurrence of DNA damage in oocytes can result in genetic abnormalities, potentially leading to infertility, birth defects, and even abortion. Therefore, understanding how oocytes detect and repair DNA damage is of paramount importance in maintaining oocyte quality and preserving fertility. Although the fundamental concept of the DDR is conserved across various cell types, an emerging body of evidence reveals striking distinctions in the DDR between mammalian oocytes and somatic cells. In this review, we highlight the distinctive characteristics of the DDR in oocytes and discuss the clinical implications of DNA damage in oocytes.
Insights
Mammalian oocytes face unique DNA damage risks due to dormancy. Understanding their distinct DNA damage response (DDR) is crucial for fertility and preventing genetic abnormalities.
Area of Science:
- Cellular Biology
- Reproductive Biology
- Genetics
Background:
- DNA damage poses a significant threat to cellular integrity.
- The DNA damage response (DDR) is a critical cellular process for maintaining genomic stability.
- Mammalian oocytes are uniquely vulnerable to DNA damage due to prolonged dormancy.
Purpose of the Study:
- To highlight the distinctive characteristics of the DDR in mammalian oocytes.
- To discuss the clinical implications of DNA damage in oocytes.
- To emphasize the importance of understanding oocyte-specific DDR for fertility preservation.
Main Methods:
- Review of existing literature on DNA damage response mechanisms.
- Comparative analysis of DDR in oocytes versus somatic cells.
- Discussion of clinical relevance and potential therapeutic targets.
Main Results:
- Oocytes exhibit unique DDR pathways compared to somatic cells.
- DNA damage in oocytes can lead to infertility and birth defects.
- Specific molecular mechanisms underlying oocyte DDR are being elucidated.
Conclusions:
- The DDR in mammalian oocytes possesses distinct features requiring further investigation.
- Understanding these differences is vital for reproductive health and managing infertility.
- Targeting oocyte-specific DDR pathways may offer new strategies for fertility preservation.
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