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Maternal diabetes and oocyte quality
1Department of Obstetrics and Gynecology, Washington University School of Medicine, St Louis, MO 63110, USA.
Abstract:
Maternal diabetes has been demonstrated to adversely affect preimplantation embryo development and pregnancy outcomes. Emerging evidence has implicated that these effects are associated with compromised oocyte competence. Several developmental defects during oocyte maturation in diabetic mice have been reported over past decades. Most recently, we further identified the structural, spatial and metabolic dysfunction of mitochondria in oocytes from diabetic mice, suggesting the impaired oocyte quality. These defects in the oocyte may be maternally transmitted to the embryo and then manifested later as developmental abnormalities in preimplantation embryo, congenital malformations, and even metabolic disease in the offspring. In this paper, we briefly review the effects of maternal diabetes on oocyte quality, with a particular emphasis on the mitochondrial dysfunction. The possible connection between dysfunctional oocyte mitochondria and reproductive failure of diabetic females, and the mechanism(s) by which maternal diabetes exerts its effects on the oocyte are also discussed.
Insights
Maternal diabetes impairs oocyte quality by causing mitochondrial dysfunction. This can lead to developmental issues in embryos and offspring, impacting reproductive success in diabetic females.
Area of Science:
- Reproductive biology
- Endocrinology
- Developmental toxicology
Background:
- Maternal diabetes negatively impacts embryo development and pregnancy outcomes.
- Compromised oocyte competence is increasingly linked to these adverse effects.
- Previous studies noted oocyte maturation defects in diabetic models.
Purpose of the Study:
- To review the impact of maternal diabetes on oocyte quality.
- To emphasize the role of mitochondrial dysfunction in diabetic oocytes.
- To discuss the link between oocyte mitochondrial defects and reproductive failure.
Main Methods:
- Review of existing literature on maternal diabetes and oocyte quality.
- Focus on studies investigating mitochondrial structure, function, and metabolism in oocytes.
- Analysis of evidence connecting oocyte defects to embryo and offspring development.
Main Results:
- Maternal diabetes causes structural, spatial, and metabolic mitochondrial dysfunction in oocytes.
- These oocyte defects are potentially transmitted to the embryo, causing developmental abnormalities.
- Impaired oocyte quality contributes to reproductive failure in diabetic females.
Conclusions:
- Maternal diabetes-induced mitochondrial dysfunction in oocytes is a key factor in reproductive issues.
- Understanding these mechanisms is crucial for addressing infertility in diabetic women.
- Further research is needed to elucidate the precise pathways involved.
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