Figure 1.

MUC1 levels in induced sputum. Induced sputum paired samples were obtained from patients in acute and remission phase of COPD exacerbation. The MUC1 levels in sputum were measured by ELISA with an antibody recognizing the CT domain (A) or EC domain (B) of MUC1 protein. Values are presented as mean ± SEM and analyzed with Mann Whitney U test, **P<0.01 (n=78). MUC1, mucin 1; COPD, chronic obstructive pulmonary disease; CT, cytoplasmic tail; EC, extracellular.