C3a-C3ar1 axis mediates macrophage M1 polarization to drive silicosis inflammation and fibrosis

Key Points

• Silicosis inflammation is driven by the C3a-C3ar1 axis in macrophages, specifically within the M1 polarization.
• Key evidence includes the observation that macrophages treated with C3a demonstrate a marked increase in pro-inflammatory cytokine production.
• Assessment using experimental models demonstrates how M1 polarization correlates with increased fibrosis in silicosis.
• These findings highlight the pathophysiological role of the C3a-C3ar1 axis, suggesting C3a as a potential therapeutic target.