Related Experiment Videos
PGE2 prevents anomalies induced by hyperglycemia or diabetic serum in mouse embryos
M P Goto1, A S Goldman, M R Uhing
1Department of Pediatrics, University of Illinois College of Medicine, Chicago 60680.
Abstract:
Both a high level of D-glucose in the medium and serum from a diabetic rat can induce neural-tube fusion defects and growth retardation in cultured mouse and rat embryos. To test our hypothesis that a deficiency of PGs may be involved in the mechanism of hyperglycemia- and diabetic serum-induced teratogenesis and growth retardation, we added PGE2 to the medium of a whole mouse embryo culture containing either normal rat serum and 52.7 mM D-glucose (hyperglycemic) or diabetic rat serum and 22.2 mM D-glucose (diabetic). After a 24-h culture, 94% of hyperglycemic embryos and 81% of diabetic embryos had neural-tube fusion defects; in addition, the number of somites, the morphological score, and the protein content of the embryos were significantly lower than those of controls. Supplementing the medium with PGE2 at concentrations of 0.028-28.4 nM (hyperglycemic) or 28.4 nM (diabetic) significantly reduced the incidence of neural-tube defects and increased the number of somites, the morphological score, and the protein content. These results strongly support the hypothesis that the teratogenicity of diabetic serum, as well as the teratogenic action of hyperglycemic culture, are mediated through a deficiency of PGs.
Insights
High glucose levels and diabetic serum cause birth defects in embryos. Supplementing with prostaglandin E2 (PGE2) significantly reduced these neural-tube fusion defects, suggesting a PG deficiency is involved.
Area of Science:
- Developmental biology
- Teratology
- Endocrinology
Background:
- Hyperglycemia and diabetic serum are known teratogens, inducing neural-tube fusion defects and growth retardation in embryonic development.
- The precise mechanisms underlying hyperglycemia-induced teratogenesis remain incompletely understood, with potential involvement of signaling pathway disruptions.
Purpose of the Study:
- To investigate the hypothesis that a deficiency in prostaglandins (PGs) mediates the teratogenic effects of hyperglycemia and diabetic serum.
- To determine if exogenous prostaglandin E2 (PGE2) can prevent or ameliorate these developmental abnormalities.
Main Methods:
- Whole mouse embryo culture was utilized under hyperglycemic (high D-glucose) and diabetic (diabetic rat serum) conditions.
- Embryos were cultured with or without varying concentrations of PGE2.
- Developmental parameters including neural-tube fusion, somite number, morphological score, and protein content were assessed after 24 hours.
Main Results:
- Hyperglycemic and diabetic serum conditions significantly increased neural-tube fusion defects and reduced embryonic growth and protein content.
- Supplementation with PGE2 markedly reduced the incidence of neural-tube defects in both hyperglycemic and diabetic culture conditions.
- PGE2 treatment also significantly improved somite number, morphological score, and protein content in treated embryos.
Conclusions:
- The findings strongly support the hypothesis that prostaglandin deficiency is a key mechanism in hyperglycemia- and diabetic serum-induced teratogenesis.
- Exogenous PGE2 can effectively counteract the detrimental effects of high glucose and diabetic serum on embryonic development.
- These results highlight the critical role of PGs in preventing developmental abnormalities associated with metabolic disturbances.