MMP1 and idiopathic pulmonary fibrosis: Moreover, supernatants from healthy donor (Figure 4C) and IPF (Figure 4D) myeloid cells showed an overall statistically significant reduction in the sCD163, IFN-α2, IFN-γ, IL-2, IL-10, IL-12p40, and MMP-1 production by IPF myeloid cells, but not by healthy donor myeloid cells.