VGLL3 activates inflammatory responses by inducing interleukin-1α secretion

Area of Science:

• Molecular Biology
• Immunology
• Cell Biology

Background:

• Vestigial-like family member 3 (VGLL3) is linked to inflammatory diseases, but its mechanisms are unclear.
• Nuclear factor-kappa B (NF-κB) is a key regulator of inflammatory responses.
• Transforming growth factor-beta (TGF-β) signaling pathways influence cellular processes.

Purpose of the Study:

• To investigate the molecular mechanisms linking VGLL3 expression to inflammation.
• To determine the role of VGLL3 in activating NF-κB.
• To elucidate the involvement of TGF-β signaling in VGLL3-mediated inflammation.

Main Methods:

• Analysis of NF-κB activation in VGLL3-expressing cell lines.
• Assessment of interleukin-1 alpha (IL-1α) expression and secretion.
• Investigation of VGLL3 interaction with TEAD transcription factors.
• Evaluation of TGF-β signaling effects on IL-1α and NF-κB.

Main Results:

• Elevated VGLL3 expression activated NF-κB.
• VGLL3 promoted IL-1α expression and secretion, a potent NF-κB activator.
• TGF-β stimulation induced IL-1α secretion and NF-κB activation, involving VGLL3, Smad3, and Smad4.
• VGLL3-dependent IL-1α secretion contributed to NF-κB activation in breast cancer cells.

Conclusions:

• VGLL3 acts as a mediator in inflammatory responses by inducing IL-1α secretion.
• TGF-β signaling pathway synergizes with VGLL3 to activate the inflammatory response.
• VGLL3-IL-1α-NF-κB axis represents a potential therapeutic target for inflammatory diseases.