differentiation of immature myelomonocytic cells causing changes to the macrophage and granulocyte populations. IL-3 signaling is able to give rise to widest array of cell lineages which is why it has been independently named "multi-CSF" in some older literature.

IL-3 also induces various effector functions in both immature and mature cells that more precisely modulate the body's defense against microbial pathogens. IL-3 is