Abstract
The increased rate of embryonic dysmorphogenesis in diabetic pregnancy is correlated with the severity and duration of the concurrent hyperglycemia during early gestation. Whole embryo culture was used to investigate a possible association of hyperglycemia-induced disturbances of embryo development with tissue levels of the three alpha-oxoaldehydes: glyoxal, methylglyoxal, and 3-deoxyglucosone (3-DG). Rat embryos exposed to high glucose levels in vitro showed severe dysmorphogenesis and a 17-fold increased concentration of 3-DG compared with control embryos cultured in a low glucose concentration. Exogenous 3-DG (100 micromol/l) added to the medium of control cultures yielded an increased embryonic malformation rate and a 3-DG concentration similar to that of embryos cultured in high glucose. Addition of superoxide dismutase (SOD) to the culture medium decreased the malformation rates of embryos exposed to either high glucose or high 3-DG levels, but it did not decrease the high embryonic 3-DG concentrations caused by either agent. Our results implicate the potent glycating agent 3-DG as a teratogenic factor in diabetic embryopathy. In addition, the anti-teratogenic effect of SOD administration appears to occur downstream of 3-DG formation, suggesting that 3-DG accumulation leads to superoxide-mediated embryopathy.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
