Glycine decreases developmental damage induced by hyperglycaemia in mouse embryos

Area of Science:

• Developmental biology
• Toxicology
• Biochemistry

Background:

• Hyperglycemia is known to cause developmental issues in embryos, including neural tube defects and growth retardation.
• The precise mechanisms by which hyperglycemia induces embryopathy are not fully understood, but oxidative stress is implicated.

Purpose of the Study:

• To investigate whether glycine can prevent or mitigate hyperglycemia-induced embryopathy in cultured mouse embryos.
• To explore the potential role of glycine's antioxidant properties in protecting against developmental abnormalities.

Main Methods:

• Early somite mouse embryos were cultured for 48 hours in media with normal glucose, high glucose (50 mmol/L), or high glucose supplemented with glycine (1 mmol/L).
• Embryo growth, differentiation, morphological scores, DNA content, and lipid peroxidation levels were assessed to evaluate developmental outcomes and malformations.

Main Results:

• Glycine did not affect embryonic development in normal glucose conditions.
• In hyperglycemic conditions, glycine partially prevented telencephalon dysmorphogenesis, reduced DNA content decrease, and improved morphological scores.
• Glycine prevented the increase in lipid peroxidation levels induced by hyperglycemia but did not prevent retarded differentiation of the otic system.

Conclusions:

• Glycine exhibits partial protective effects against hyperglycemia-induced teratogenesis in mouse embryos, primarily through its antioxidant activity.
• The antioxidative effect of glycine contributes to its antiteratogenic properties.
• Further studies are required to elucidate other potential mechanisms, such as antiglycation effects, underlying glycine's protective role.