Folate-Dependent Cognitive Impairment Associated With Specific Gene Networks in the Adult Mouse Hippocampus

Area of Science:

• Neuroscience
• Nutritional Science
• Genetics

Background:

• Short-term folate deficiency is associated with cognitive impairments.
• Folate is crucial for nucleotide synthesis and DNA/histone methylation, impacting gene expression.
• Altered gene expression may involve specific regulatory networks.

Purpose of the Study:

• To investigate the cognitive effects of folic acid (FA) deficiency in mice.
• To correlate cognitive deficits with genetic alterations in the hippocampus.
• To identify potential molecular targets for memory-related diseases.

Main Methods:

• Mice were fed either folic acid-deficient or replete diets from post-weaning to 18 months.
• Cognitive function was assessed using the novel object recognition test.
• Hippocampal gene expression was analyzed using microarrays, followed by bioinformatics analysis.

Main Results:

• FA-deficient mice exhibited significant memory impairment from 5 to 17 months of age.
• Microarray analysis revealed 363 downregulated and 101 upregulated genes in the hippocampus of deficient mice.
• Enriched binding motifs for MafB and Zfp410 were identified, potentially regulating these differentially expressed genes.

Conclusions:

• Folic acid deficiency significantly impacts cognitive function and hippocampal gene expression in mice.
• Identified gene expression changes and regulatory motifs offer potential therapeutic targets for cognitive decline.
• This study highlights the critical role of folate in maintaining cognitive health and hippocampal function.