title: Production of monoclonal antibody against granulomonopoietic enhancing activity (GM-EA).
abstract: The granulomonopoietic enhancing activity (GM-EA) is a novel myelopoietic synergizing factor which acts as an enhancing factor for the proliferation and/or maturation of myelopoietic progenitor cells (CFU-GM) in combination with various types of colony-stimulating factors. In the present study, we report the production of a mouse anti-human GM-EA monoclonal antibody (mAb) designated 63A which is of the IgG1 subclass and has kappa light chains. This mAb can be used to quantitate GM-EA using a solid-phase enzyme-linked immunoabsorbent assay (ELISA) and is shown to have no cross-reaction with other myeloid synergizing factors. Furthermore, 63A mAb can significantly neutralize the colony-enhancing activity of GM-EA when added to CFU-GM assay cultures. In addition to being a convenient tool for the assay of GM-EA, 63A mAb may also be valuable for the exploration of the full potential of this enhancing factor in myelopoiesis.
authors.affiliation: Department of Medical Research, Veterans General Hospital-Taipei, Taiwan.
authors.forename: C W
authors.initials: CW
authors.lastname: Lieu
authors.forename: C K
authors.initials: CK
authors.lastname: Ho
authors.forename: S Y
authors.initials: SY
authors.lastname: Wang
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis / Q000276:immunology*; D002999:Clone Cells; D004797:Enzyme-Linked Immunosorbent Assay; D006133:Growth Substances / Q000032:analysis / Q000276:immunology*; D006801:Humans; D051379:Mice; D008807:Mice, Inbred BALB C; D011506:Proteins
chemical_list: D000911:Antibodies, Monoclonal; D006133:Growth Substances; D011506:Proteins; C057957:granulomonopoietic enhancing activity