Trefoil factor 3 shows anti-inflammatory effects on activated microglia

Area of Science:

• Neuroscience
• Immunology
• Cell Biology

Background:

• Microglial cells are key players in central nervous system (CNS) inflammation, exhibiting M1 (pro-inflammatory) and M2 (anti-inflammatory) phenotypes.
• Modulating microglial phenotype from M1 to M2 is a potential therapeutic strategy for CNS inflammatory conditions.
• Reducing neuronal damage during inflammation is crucial for neurological health.

Purpose of the Study:

• To investigate the role of trefoil factor 3 (TFF3) in regulating microglial cell responses during CNS inflammation.
• To determine if TFF3 influences the pro-inflammatory or anti-inflammatory phenotype of microglial cells.
• To explore TFF3 as a potential therapeutic target for CNS inflammatory diseases.

Main Methods:

• Assessed TFF3 secretion by astrocytes.
• Quantified TFF3 transcription levels following lipopolysaccharide (LPS) stimulation.
• Cultured microglial cells with TFF3 and stimulated them with LPS.
• Measured pro-inflammatory cytokine expression and secretion in microglial cells.

Main Results:

• Astrocytes secrete the anti-inflammatory protein TFF3.
• LPS stimulation significantly reduced TFF3 transcription in astrocytes.
• TFF3 presence in microglial cultures reduced the expression and secretion of pro-inflammatory cytokines upon LPS stimulation.
• TFF3 appears to promote a shift away from the M1 pro-inflammatory microglial phenotype.

Conclusions:

• Astrocytes produce TFF3, an anti-inflammatory protein.
• TFF3 mitigates LPS-induced pro-inflammatory responses in microglial cells.
• TFF3 represents a promising therapeutic target for managing CNS inflammation and protecting neurons.