Related Experiment Videos
Chronic alcohol exposure and lactation: extended observations
1Department of Obstetrics/Gynecology, School of Medicine, Wayne State University, Detroit, MI 48201, USA. sarah.heil@uvm.edu
Alcohol (Fayetteville, N.Y.)
|August 30, 2000
Summary
Chronic alcohol exposure in lactating dams initially inhibits prolactin (PRL) release but shows a rebound effect with extended suckling. Litter growth retardation due to alcohol also resolves after alcohol cessation.
Area of Science:
- Endocrinology
- Reproductive Biology
- Neuroscience
Background:
- Chronic alcohol consumption impacts maternal physiology and offspring development.
- Previous studies showed alcohol inhibits short-term (30 min) suckling-induced prolactin release.
- Alcohol exposure in dams led to litter growth retardation.
Purpose of the Study:
- To investigate the effect of extended suckling (120 min) on prolactin release after chronic alcohol exposure.
- To determine if alcohol-induced litter growth retardation persists after alcohol cessation.
Main Methods:
- Lactating dams received daily alcohol (1.0- or 2.0-g/kg BW) or saline for 8 days.
- Blood alcohol levels (BALs) were maintained for 4 hours daily.
- Suckling-induced prolactin release and litter body weights were assessed.
Main Results:
- Prolactin release was inhibited at 30 min but significantly higher after 120 min of suckling in the 2.0-g/kg alcohol group.
- Litter growth retardation was observed during alcohol exposure (days 8-16).
- Litter body weights recovered and were not different from controls by days 18-20.
Conclusions:
- Chronic alcohol exposure alters prolactin dynamics during lactation, with a delayed but enhanced release during prolonged suckling.
- Alcohol-induced growth deficits in offspring are reversible after the cessation of maternal alcohol exposure.