Coenzyme A activates TLR4 and enhances alternative macrophage activation in line with MyD88 agonism.

Coenzyme A activates TLR4 and boosts IL-4-driven macrophage activation via MyD88, revealing a new metabolic pathway influencing immune responses.

• Why it matters: Understanding how metabolites regulate inflammation is crucial for developing therapies for inflammatory diseases, yet the specific pathways remain unclear.
• What they did: The study examined the effects of exogenous CoA on macrophages, demonstrating its role as a weak TLR4 agonist that primes macrophages for enhanced IL-4 responses through MyD88 signaling.
• The result: Findings show CoA influences macrophage function by extrinsically activating TLR4, promoting chromatin changes that increase IL-4 gene transcription, and facilitating inflammation resolution.