Maternal choline supplementation in a rat model of periconceptional alcohol exposure: Impacts on the fetus and placenta

Steane, Sarah E., Fielding, Arree M., Kent, Nykola L., Andersen, Isabella, Browne, Daniel J., Tejo, Ellen N., Gårdebjer, Emelie M., Kalisch‐Smith, Jacinta I., Sullivan, Mitchell A., Moritz, Karen M., and Akison, Lisa K. (2021) Maternal choline supplementation in a rat model of periconceptional alcohol exposure: Impacts on the fetus and placenta. Alcohol: Clinical & Experimental Research, 45 (10). pp. 2130-2146.

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Background: Maternal choline supplementation in rats can ameliorate specific neurological and behavioral abnormalities caused by alcohol exposure during pregnancy. We tested whether choline supplementation ameliorates fetal growth restriction and molecular changes in the placenta associated with periconceptional ethanol exposure (PCE) in the rat.

Methods: Sprague Dawley dams were given either 12.5% ethanol (PCE) or 0% ethanol (Con) in a liquid diet from 4 days prior to 4 days after conception. At day 5 of pregnancy, dams were either placed on a standard chow (1.6 g choline/kg chow) or an intermediate chow (2.6 g choline/kg chow). On day 10 of pregnancy, a subset of the intermediate dams were placed on a chow further supplemented with choline (7.2 g choline/kg chow), resulting in 6 groups. Fetuses and placentas were collected on day 20 of pregnancy for analysis.

Results: Choline supplementation resulted in increased fetal weight at late gestation, ameliorating the deficits due to PCE. This was most pronounced in litters on a standard chow during pregnancy. Choline also increased fetal liver weight and decreased fetal brain:liver ratio, independent of alcohol exposure. Placental weight was reduced as choline levels in the chow increased, particularly in female placentas. This resulted in a greater ratio of fetal:placental weight, suggesting increased placental efficiency. Global DNA methylation in the placenta was altered in a sex-specific manner by both PCE and choline. However, the increased glycogen deposition in female placentas, previously reported in this PCE model, was not prevented by choline supplementation.

Conclusions: Our results suggest that choline has the potential to ameliorate fetal growth restriction associated with PCE and improve placental efficiency following prenatal alcohol exposure. Our study highlights the importance of maternal nutrition in moderating the severity of adverse fetal and placental outcomes that may arise from prenatal alcohol exposure around the time of conception.

Item ID: 78771
Item Type: Article (Research - C1)
ISSN: 1530-0277
Copyright Information: © 2021 Research Society on Alcoholism
Funders: National Health and Medical Research Council (NHMRC)
Projects and Grants: NHMRC grant number APP1191217
Date Deposited: 06 Jun 2023 22:32
FoR Codes: 32 BIOMEDICAL AND CLINICAL SCIENCES > 3215 Reproductive medicine > 321501 Foetal development and medicine @ 100%
SEO Codes: 20 HEALTH > 2001 Clinical health > 200104 Prevention of human diseases and conditions @ 100%
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