THP-1 is a human leukemia monocyte cell line established in the 1980s that can acquire a macrophage-like phenotype after stimulation with phorbol-12-myristate-13-acetate (PMA), 1α, 25-dihydroxyvitamin D3 (vD3) or macrophage colony-stimulating factor (M-CSF)24,25. Here, CSF1 is linked to leukemia.