Glutathione Dynamics in Oocyte Maturation and Embryo Development
Summary
Glutathione, the principal intracellular non‐protein thiol, plays a pivotal role in safeguarding developing oocytes and early embryos against oxidative stress. During oocyte maturation, the intracellular concentration of reduced glutathione increases markedly, contributing to redox homeostasis, regulation of meiotic progression and prevention of DNA damage. In the transition to the preimplantation embryo, dynamic fluctuations in glutathione levels modulate reactive oxygen species (ROS) signalling, support mitochondrial function and influence apoptotic pathways via regulation of pro‐ and anti‐apoptotic gene expression. Adequate glutathione reserves are critical for successful fertilisation, cleavage and blastocyst formation, and are especially important in assisted reproduction where in vitro culture and cryopreservation impose additional oxidative challenges. Understanding glutathione synthesis, uptake and recycling in the oocyte–embryo continuum underlies improvements in culture media formulation, antioxidant supplementation and cryotolerance strategies, with direct implications for fertility treatment outcomes and livestock breeding programmes.
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Glutathione Dynamics in Oocyte Maturation and Embryo Development publication trend
The graph below shows the total number of articles in glutathione dynamics in oocyte maturation and embryo development across all publications each year (not limited to Nature Index journals).
Technical terms
Glutathione (GSH): A tripeptide antioxidant that protects cells from oxidative damage and maintains redox balance.
Oocyte: A female germ cell that undergoes maturation to become a fertilisable egg.
Vitrification: An ultra‐rapid freezing technique used to cryopreserve cells or tissues without ice crystal formation.
Reactive oxygen species (ROS): Chemically reactive molecules containing oxygen that can damage cellular components if unregulated.
Blastocyst: A stage of embryo development characterised by a fluid‐filled cavity, inner cell mass and trophectoderm, crucial for implantation.
References
- Exogenous L-Glutathione Improves Vitrification Outcomes in Murine Preimplantation Embryos. Antioxidants (2022).
- Resveratrol Reduces ROS by Increasing GSH in Vitrified Sheep Embryos. Animals (2023).
- Improved developmental potential of mouse vitrified‐warmed oocytes achieved by culturing in recovery medium with glutathione ethyl ester (GSH‐OEt). Reproductive Medicine and Biology (2021).
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