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Type: Journal article
Title: Chronic maternal fluoxetine infusion in pregnant sheep: effects on the maternal and fetal hypothalamic-pituitary-adrenal axes
Author: Morrison, J.
Riggs, K.
Chien, C.
Gruber, N.
McMillen, I.
Rurak, D.
Citation: Pediatric Research, 2004; 56(1):40-46
Publisher: Int Pediatric Research Foundation Inc
Issue Date: 2004
ISSN: 0031-3998
Statement of
Janna L. Morrison, K. Wayne Riggs, Caly Chien, Nancy Gruber, I. Caroline McMillen and Dan W. Rurak
Abstract: Depression during pregnancy is frequently treated with the selective serotonin reuptake inhibitor, fluoxetine (FX). FX increases serotonergic neurotransmission and serotonin plays a role in the regulation of the hypothalamic-pituitary-adrenal (HPA) axis. We have therefore investigated the effect of chronic administration of FX to the pregnant ewe on the maternal and fetal HPA axes. Nineteen late-gestation sheep were surgically prepared for chronic study of the fetus. FX (n = 7, 98.5 µg/kg/d) or sterile water (control, n _ 8) was administered to the ewe for 8 d by constant rate i.v. infusion with an initial FX bolus dose of 70 mg. Maternal and fetal plasma ACTH and cortisol concentrations were determined at 0700 h each day. Maternal plasma ACTH concentrations fell on infusion d 2, but no changes were observed in maternal plasma cortisol concentrations. Fetal plasma ACTH concentrations increased on infusion d 7, and fetal plasma cortisol concentrations increased on infusion d 6, 7, and 8 in the FX group. In addition, the regression coefficient for the relationship between fetal ACTH and cortisol levels was significantly greater in the FX group compared with the control group. Thus, maternal FX treatment increased fetal plasma cortisol concentration. These results are of particular interest in the context that exposure of the fetus to excess glucocorticoids at critical windows during development has been shown to increase the risk of poor health outcomes in later life.
Keywords: Pituitary-Adrenal System; Hypothalamo-Hypophyseal System; Fetus; Animals; Sheep; Carbon Dioxide; Oxygen; Fluoxetine; Hydrocortisone; Antidepressive Agents, Second-Generation; Gestational Age; Pregnancy; Female; Adrenocorticotropic Hormone
Rights: Copyright © 2004 International Pediatric Research Foundation, Inc.
RMID: 0020040636
DOI: 10.1203/01.PDR.0000128981.38670.28
Appears in Collections:Molecular and Biomedical Science publications

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