Mitochondrial Function in Oocyte and Embryo Development
Summary
Mitochondria are essential organelles in oocytes and early embryos, serving as the principal sites of adenosine triphosphate production and as regulators of redox and calcium homeostasis. During oocyte maturation, mitochondrial DNA copy number increases dramatically and organelle distribution shifts from a dispersed to a clustered pattern, ensuring that energy demands for chromosomal segregation, transcription and translation are met. Maternal inheritance of mitochondria means that oocyte mitochondrial quality directly influences embryonic genome activation, subsequent blastocyst formation and implantation potential. Dysfunctional mitochondria give rise to elevated reactive oxygen species, bioenergetic deficiency and an increased risk of chromosomal anomalies and developmental arrest. These insights underpin global efforts to develop biomarkers of oocyte competence, such as quantification of mitochondrial genomes, and to devise interventions ranging from targeted antioxidants to mitochondrial supplementation. Improved understanding of mitochondrial dynamics in female gametes promises to enhance assisted reproduction, address age-related fertility decline and inform strategies against metabolic disorders that impair reproductive success.
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Mitochondrial Function in Oocyte and Embryo Development publication trend
The graph below shows the total number of articles in mitochondrial function in oocyte and embryo development across all publications each year (not limited to Nature Index journals).
Technical terms
AMP-activated protein kinase (AMPK): A cellular energy sensor that regulates mitochondrial biogenesis and metabolic homeostasis.
Mitochondrial heteroplasmy: Co-existence of different mitochondrial DNA variants within a single cell.
In vitro maturation (IVM): Laboratory technique that matures oocytes outside the ovarian environment.
Reactive oxygen species (ROS): Chemically reactive molecules derived from oxygen that can damage cellular components.
References
- AMPK Suppression Due to Obesity Drives Oocyte mtDNA Heteroplasmy via ATF5‐POLG Axis. Advanced Science (2024).
- Comprehensive atlas of mitochondrial distribution and dynamics during oocyte maturation in mouse models. Biomarker Research (2024).
- Redistribution of mitochondria leads to bursts of ATP production during spontaneous mouse oocyte maturation. Journal of Cellular Physiology (2010).
- Altered Levels of Mitochondrial DNA Are Associated with Female Age, Aneuploidy, and Provide an Independent Measure of Embryonic Implantation Potential. PLOS Genetics (2015).
- The Role of Mitochondria from Mature Oocyte to Viable Blastocyst. Obstetrics and Gynecology International (2013).
- The impact of mitochondrial function/dysfunction on IVF and new treatment possibilities for infertility. Reproductive Biology and Endocrinology (2014).
- Restoration of normal embryogenesis by mitochondrial supplementation in pig oocytes exhibiting mitochondrial DNA deficiency. Scientific Reports (2016).
- The Role of Mitochondria in Oocyte Maturation. Cells (2021).
- Mitochondria: Their relevance during oocyte ageing. Ageing Research Reviews (2021).
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