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Horm Metab Res 2006; 38(9): 598-602
DOI: 10.1055/s-2006-951309
Original Clinical

© Georg Thieme Verlag KG Stuttgart · New York

A Study to Determine if Acute Maternal and Fetal Hyperglycemia/Insulinemia Induces Leptin Production during Pregnancy

J. Santolaya-Forgas 1 , S. H. Mehta 2 , V. D. Castracane 3
  • 1Center for Fetal Medicine and Prenatal Genetics, Brigham and Women's Hospital Harvard Medical School, Boston, MA 02115, USA
  • 2Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Hutzel Women's Hospital, Wayne State University, Detroit, Michigan 48201, USA
  • 3Foundation for Blood Research, Scarborough, Maine 04070, USA
Further Information

Publication History

Received 2 January 2006

Accepted after revision 27 April 2006

Publication Date:
18 September 2006 (online)

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Abstract

Background: In pregnant primates, the effect of post-prandial hyperglycemic or insulinemic states on leptin production is not known. Our goal was to conduct a controlled study using an established pregnant baboon model (Papio anubis) to determine whether acute glucose changes would have an effect on maternal or fetal plasma leptin levels. Methods: Two animals were operated on at 138 and 140 days of gestation (term ∼184 days) by placing 4 cannulae in the maternal aorta, inferior vena cava, fetal carotid artery, and the amniotic cavity. At 145 and 150 days, glucose infusions were started via the maternal femoral vein. Animal 1 received 7.5 gm of glucose over a 2-hour period at 145th day. Animal 2 received 20 gm of glucose over a 1-hour period at 150th day. Both animals remained ad libitum throughout the experiments. Maternal and fetal blood samples were obtained from the arterial lines before the glucose infusion and at half hour intervals to include 30 minutes post-infusion. Results: Significant changes from baseline concentrations were observed for maternal and fetal glucose and insulin concentrations in response to both glucose challenges. Maternal and fetal plasma leptin concentrations did not correlate with glucose or insulin changes. Conclusion: This preliminary study demonstrated that in primates, acute changes in circulating maternal or fetal glucose or insulin concentration do not affect maternal or fetal plasma leptin concentrations. These results suggest that alterations in leptin secretion by the maternal-placental-fetal unit may only occur in pathological states.

Key words

Pregnancy - baboon - maternal hyperglycemia - fetal leptin