IL1B and neoplasm: Although all six types of macrophages showed increased phagocytosis of tumor cells in the presence of TTI-621, M(-), M(IL-4) and M(HAGG+IL-1β) macrophages exhibited slightly lower phagocytic capabilities compared to the M(IFN-γ), M(IFN-γ + LPS) and M(IL-10 + TGFβ) subsets (Fig 1).