CXCL8 and asthma: In all asthma patients, serum sTNF RI levels correlated with miRNA-106a (r = − 0.51, p < 0.001) and miRNA-126a (r = − 0.48, p = 0.004), while in EA, miRNA -126a was negatively correlated with TNF α (r = − 0.54, p = 0.005) and miRNA-146a was positively correlated with IL-8 (r = 0.45, p = 0.03).