Granulocyte-macrophage colony-stimulating factor is also known as Colony-stimulating factor,CSF, Molgramostin and Sargramostim. In humans, it is encoded by the CSF2 gene. It belongs to the GM-CSF family. Granulocyte-macrophage colony-stimulating factor is a cytokine that stimulates the growth and differentiation of hematopoietic precursor cells from various lineages, including granulocytes, macrophages, eosinophils and erythrocytes.