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Related Experiment Video

Updated: Aug 1, 2025

Moderate Prenatal Alcohol Exposure and Quantification of Social Behavior in Adult Rats
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Longitudinal Evaluation Using Preclinical 7T-Magnetic Resonance Imaging/Spectroscopy on Prenatally Dose-Dependent

Tensei Nakano1, Tomohiro Natsuyama2, Naoki Tsuji2

  • 1Department of Medical Physics and Engineering, Division of Health Sciences, Osaka University Graduate School of Medicine, Suita, Osaka 560-0871, Japan.

Metabolites
|April 28, 2023
PubMed
Summary
This summary is machine-generated.

Prenatal alcohol exposure in a rat model led to reduced brain volume and lower taurine levels, indicating persistent fetal alcohol spectrum disorder (FASD) effects into adulthood.

Keywords:
fetal alcohol spectrum disorderpreclinical 7T-MRI/MRSprenatally alcohol-exposed

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Area of Science:

  • Neuroscience
  • Toxicology
  • Developmental Biology

Background:

  • Prenatal alcohol exposure is a leading cause of birth defects, collectively termed fetal alcohol spectrum disorders (FASD).
  • Understanding the long-term neurological consequences of FASD is crucial for developing effective interventions.
  • Animal models are essential for studying the mechanisms and effects of FASD.

Purpose of the Study:

  • To evaluate a novel rat model of FASD using progressively increasing doses of alcohol during late pregnancy.
  • To assess the impact of prenatal alcohol exposure on brain volume and metabolites over time using preclinical MRI and MRS.
  • To investigate the persistence of alcohol-induced effects into adulthood in the FASD model.

Main Methods:

  • Wistar rats were administered varying doses of ethanol during gestational day 15 to create FASD models.
  • Magnetic resonance imaging (MRI) and MR spectroscopy (MRS) were performed at 4 and 8 weeks of age.
  • Brain region volumes and specific metabolite ratios (Taurine/Cr) were quantified and compared between control and FASD groups.

Main Results:

  • FASD model rats exhibited significantly reduced body weight and cortex volume at 4 weeks of age compared to controls.
  • Lower Taurine/Creatine (Cr) ratios were observed in the highest dose FASD group at 4 weeks, persisting at 8 weeks of age.
  • These findings suggest that prenatal alcohol exposure leads to lasting reductions in brain volume and taurine levels.

Conclusions:

  • This study establishes a rat model for FASD, demonstrating persistent neurodevelopmental deficits.
  • Preclinical MRI and MRS revealed significant decreases in brain volume and taurine levels, extending into adulthood.
  • The findings highlight the long-term impact of prenatal alcohol exposure on brain structure and function.