Diabetes, Vol 39, Issue 6 734-739, Copyright © 1990 by American Diabetes Association

ARTICLES

Inheritance of diabetes mellitus as consequence of gestational hyperglycemia in rats

D Gauguier, MT Bihoreau, A Ktorza, MF Berthault and L Picon
Laboratory of Developmental Physiology, University of Paris, France.

Our study investigated whether a deterioration of glucose homeostasis and insulin secretion in adult female rats from hyperglycemic dams could be transmitted to the next generation independent of genetic interferences. Dams (F0) were rendered hyperglycemic by continuous glucose infusion during the last week of pregnancy. Females born of these rats (F1) exhibited glucose intolerance and impaired insulin secretion in vivo at adulthood. When they were 3 mo old, they were matched with males born of control dams. During pregnancy, their glucose tolerance remained impaired compared with that of controls. Consequently, F2 newborns of F1 hyperglycemic dams showed the main features of newborns from diabetic mothers: they were hyperglycemic, hyperinsulinemic, and macrosomic. As adults, they displayed basal hyperglycemia and defective glucose tolerance and insulin secretion. This indicates that the long-range deteriorating effects on glucose homeostasis of gestational hyperglycemia in the F1 generation are transmitted to the F2 generation and suggests that a perturbed fetal metabolic environment contributes to the inheritance of diabetes mellitus.
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