FABP7 Expression Modulates the Response of Astrocytes to Induced Endotoxemia

Area of Science:

• Neuroscience
• Cell Biology
• Immunology

Background:

• Fatty acid binding proteins (FABPs) are crucial for fatty acid (FA) trafficking.
• FABP7 is highly expressed in adult astrocytes, influencing lipid metabolism and energy homeostasis.
• Upregulated FABP7 in reactive astrocytes contributes to neuroinflammation and neuronal damage in neurodegenerative diseases.

Purpose of the Study:

• To investigate the role of FABP7 in astrocyte inflammatory responses.
• To determine if FABP7 modulates astrocyte-mediated neurotoxicity.
• To assess FABP7 as a potential therapeutic target for neuroinflammation.

Main Methods:

• Silencing FABP7 expression in astrocyte cultures and human iPSC-derived astrocytes.
• Utilizing NF-κB luciferase reporter assays and p65 subunit translocation analysis.
• Co-culturing stimulated astrocytes with motor neurons to assess neurotoxicity.
• In vivo studies involving FABP7 knockdown in mice following LPS administration.
• Whole transcriptome RNA sequencing analysis.

Main Results:

• FABP7 silencing decreased NF-κB reporter activity and p65 nuclear translocation in response to inflammatory stimuli.
• FABP7 knockdown reduced the toxicity of stimulated astrocytes towards motor neurons.
• In vivo FABP7 knockdown attenuated glial activation and NF-κB-dependent gene expression in the cerebral cortex after LPS treatment.
• Transcriptome analysis revealed an attenuated inflammatory profile following FABP7 knockdown.

Conclusions:

• FABP7 plays a significant role in mediating astrocyte inflammatory responses.
• Silencing FABP7 protects neurons from astrocyte-induced toxicity.
• FABP7 is a promising therapeutic target for mitigating neuroinflammation in the central nervous system.