Chronic Ethanol Consumption by Rats before Mating Affects Working Memory in the Offspring.

Area of Science:

• Neuroscience
• Toxicology
• Developmental Biology

Background:

• Paternal and maternal alcohol consumption prior to conception can impact offspring neurodevelopment.
• Understanding the transgenerational effects of alcohol exposure on cognitive functions is crucial.

Purpose of the Study:

• To investigate the effects of parental (F0) alcohol consumption on non-spatial and spatial memory in their sexually mature offspring (F1).
• To examine potential sex-specific differences in cognitive impairments and underlying neurobiological changes.

Main Methods:

• Outbred rats (F0) were exposed to a 10% ethanol solution for 30 weeks before mating.
• Offspring (F1) underwent behavioral testing, including the novel object recognition test and T-maze for spatial memory assessment.
• Brain-derived neurotrophic factor (BDNF) levels were measured in the hippocampus and prefrontal cortex.

Main Results:

• F1 males showed an increased recognition index in the novel object recognition test, while F1 females showed a decrease.
• F1 males exhibited a decrease in spatial memory in the T-maze, which persisted as a trend.
• Memory impairment in F1 females was associated with reduced BDNF levels in the hippocampus.

Conclusions:

• Parental alcohol consumption before mating significantly impairs long-term working memory in female offspring.
• Cognitive deficits in female offspring were linked to decreased hippocampal BDNF levels.
• Sex-specific effects of prenatal alcohol exposure on cognitive function and neurobiology were observed.