Mitochondrial Dysfunction and Oxidative Stress Caused by Cryopreservation in Reproductive Cells

Area of Science:

• Cell Biology
• Reproductive Biology
• Biochemistry

Background:

• Mitochondria are vital for cellular energy and homeostasis, producing reactive oxygen species (ROS).
• Excess ROS leads to oxidative stress (OS), impairing cellular functions, including ATP synthesis and calcium regulation.
• Mitochondrial dysfunction significantly impacts gamete competence and embryo development.

Purpose of the Study:

• To review the roles of mitochondria and ROS in sperm and oocyte function.
• To examine the relationship between mitochondrial damage and ROS during gamete cryopreservation.
• To propose mechanisms of cryopreservation-induced mitochondrial dysfunction and discuss protective strategies.

Main Methods:

• Literature review of studies on mitochondria, ROS, and cryopreservation in gametes and gonadal tissues.
• Analysis of existing hypotheses on cryopreservation-associated mitochondrial dysfunction.
• Discussion of potential roles for antioxidants and other agents.

Main Results:

• Cryopreservation in assisted reproductive technologies (ART) can compromise mitochondrial function.
• Elevated intracellular OS during cryopreservation reduces gamete competence and affects fertilization and embryo development.
• A biunivocal relationship exists between mitochondrial damage and ROS generation in cryopreserved gametes.

Conclusions:

• Mitochondrial dysfunction is a critical factor in reduced reproductive outcomes following gamete cryopreservation.
• Understanding the interplay between mitochondria and ROS is crucial for improving ART success rates.
• Antioxidants and other protective agents show promise in maintaining the viability of cryopreserved reproductive cells and tissues.