IDENTIFICATION OF THE HUMAN ANALOG OF A REGULATOR THAT INDUCES DIFFERENTIATION IN MURINE LEUKEMIC-CELLS

Abstract

We have recently purified murine granulocyte colony-stimulating factor (G-CSF), a regulatory glycoprotein which stimulates granulocyte colony formation from committed murine precursor cells in semi-solid agar cultures. G-CSF is one of a family of colony-stimulating factors that regulate the growth and differentiation of granulocytes and macrophages. While the other murine CSFs (granulocyte-macrophage (GM)-CSF, macrophage (M)-CSF and multi-CSF) show little or no differentiation-inducing activity on murine myelomonocytic leukaemia cell lines, G-CSF (or MGI-2(6)) is able to induce the production of terminally differentiated cells from WEHI-3B and other myeloid leukaemia cell lines. More importa..