Gene Expression Profiling in the Cortex of Fabp4 Knockout Mice

Area of Science:

• Neuroscience
• Metabolic Regulation
• Epigenetics

Background:

• Fatty acid binding protein 4 (Fabp4) is crucial for peripheral lipid metabolism.
• Its role in brain function is largely unknown.
• Fabp4 knockout (KO) mice exhibit autism-like behaviors.

Purpose of the Study:

• Investigate Fabp4 expression in the adult mouse brain.
• Analyze gene expression changes in Fabp4 KO mice to understand its impact on brain function.

Main Methods:

• In situ hybridization to detect Fabp4 expression in mouse brain regions.
• RNA-sequencing (RNA-seq) for differential gene expression analysis in the prefrontal cortex of Fabp4 KO mice.

Main Results:

• Fabp4 expression was undetectable in the adult mouse brain.
• Fabp4 deficiency led to significant gene expression changes: 31 genes upregulated and 30 downregulated.
• Downregulated genes involved histone methylation and metabolism; upregulated genes related to synaptic organization.

Conclusions:

• Fabp4 is not directly expressed in the brain, but its deficiency impacts brain gene expression.
• Peripheral metabolic pathways and epigenetic regulation likely mediate these effects.
• Findings suggest systemic lipid metabolism influences neurodevelopmental disorders like ASD and highlight epigenetic mechanisms.