CXCL8 and idiopathic pulmonary fibrosis: Seventy-two hours after treatment, neither CpG nor TGFß1 induced consistent IL-8 protein expression and/or secretion by normal lung fibroblasts (Fig. 3i), however, TGFß1 promoted IL-8 protein expression and/or secretion by IPF lung fibroblasts, and this effect was enhanced by Nu7441 treatment (Fig. 3j).