There was no difference between COPD monocytes and those from healthy donors with regard to the release of IL-8/CXCL8, IL-6, Gro-α/CXCL1, TNF-α, MDC/CCL22, and TARC/CCL17 (Fig. 7b–g). This evidence concerns the gene CXCL1 and chronic obstructive pulmonary disease.