Additional file 1 of Human epididymis protein 4 aggravates airway inflammation and remodeling in chronic obstructive pulmonary disease

Additional file 1. Figure S1. Cell viability in HBE or HPF cells under different treatments. A, B Cell viability was not affected both in HBE cells (n = 4) and HPF cells (n = 4) under different concentrations of CSE for 24 h. C Treatment with various concentrations of H2O2 for 24 h conducted no obvious influence on HBE cell viability (n = 4). Data are expressed as mean ± SEM. P-values were calculated using one-way ANOVA followed by Newman–Keuls test. CSE, cigarette smoke extract; HBE, human bronchial epithelial; HPF, human pulmonary fibroblast.