PPARG and interstitial lung disease: As shown by keyword clustering analysis (Figure 5), recent fibrosis research has expanded beyond liver and lung involvement, encompassing renal fibrosis (#0), interstitial lung disease (#1), liver fibrosis (#2), cardiac fibrosis (#3), cystic fibrosis (#4), and exploring emerging mechanisms such as extracellular vesicle signaling, PPARγ modulation, oxidative stress, and immune regulation.