Journal of the Society for Gynecologic Investigation

 

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Journal of the Society for Gynecologic Investigation, Vol. 11, No. 1, 36-41 (2004)
DOI: 10.1016/j.jsgi.2003.06.001

Influence of Maternal Diabetes on Placental Fibroblast Growth Factor-2 Expression, Proliferation, and Apoptosis

D. W. Burleigh, PhD

K. Stewart, MD

K. M. Grindle

H. H. Kay, MD

Wisconsin National Primate Research Center, and Department of Obstetrics and Gynecology, University of Wisconsin, Madison, Wisconsin; Edward Hospital, Naperville, Illinois

T. G. Golos, PhD

Wisconsin National Primate Research Center, and Department of Obstetrics and Gynecology, University of Wisconsin, Madison, Wisconsin; Edward Hospital, Naperville, Illinois; golos{at}primate.wisc.edu

Objective: Type I diabetes mellitus during pregnancy is associated with dysregulation of the oxygen and glucose metabolic pathways, both of which affect placental villous growth and function. Alteration of placental development in women with diabetes may contribute to the increased risk of preeclampsia, macrosomia, or fetal growth restriction.

Methods: To evaluate placental growth in the setting of maternal diabetes, immunohistochemical techniques were used to examine fibroblast growth factor-2 (FGF-2) expression, cell proliferations (Ki67), and apoptosis (Apo-Tag) in placentas from diabetic and nondiabetic patients.

Results: Immunostaining for FGF-2 in placentas from diabetic women demonstrated an increase in intensity within the villous stroma and syncytiotrophoblast (P < .05). Associated with these changes in FGF-2 expression, placentas from diabetic women showed no change in villous mitotic activity but did show decreased stromal compartment apoptosis. When expressed as a ratio of Ki67-positive: Apo-Tag-positive nuclei as an index of relative cell turnover, the stromal compartment showed a significant trend towards decreased nucleic turnover (P < .05), suggesting relative tissue growth in diabetic patients.

Conclusion: Increased FGF-2 expression and decreased stromal cell compartment turnover in the diabetic placenta might be a compensatory mechanism in response to the altered physiologic milieu of maternal diabetes on placental function.

Key Words: Apoptosis • FGF-2 • hyperglycemia • placenta • proliferation


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