Interestingly, hydrogen peroxide significantly increased CCL28-mediated effects and CXCL8 expression in IPF but not normal MPC cultures (Figure 3, G–N), suggesting that CCR10 ligand promotes the expansion of normal and IPF CCR10+ MPCs and that hydrogen peroxide enhances this effect in IPF, but not normal, MPC cultures. The gene discussed is CXCL8; the disease is idiopathic pulmonary fibrosis.