Gene expression analysis of the profibrotic cytokine transforming growth factor β (TGFB1) revealed a significant reduction in laryngotracheal stenosis (LTS)–derived fibroblasts treated with interferon-γ (INF-γ) compared with untreated fibroblasts in all 6 patient samples. Gene expression is described in the legend of Figure 2. There was no significant difference in the gene expression of TGFB1, MMP1, FN1, or ACTA2. Gene expression is described in the legend of Figure 2. Error bars indicate 95% CIs.
aP = .03 compared with untreated fibroblasts.