Stem cell proliferation factor

摘要

The present invention is directed to an autocrine growth factor isolated from a human germ cell tumor line. In particular, it relates to the production, purification and uses of stem cell proliferation factor (SCPF). The protein of the invention exists in two forms, a soluble form and a membrane bound form which is detectable on the surface of a small percentage of human bone marrow cells and stimulates the proliferation of these cells. Therefore, SCPF may have a wide range of applications including but not limited to augmenting the growth of hematopoietic stem cells. Further, removal of the protein by an antibody may be useful in controlling tumor cell growth.