title: Monoclonal anti-thrombopoietin antibodies generated by genetic immunization.
abstract: Thrombopoietin (TPO) is a megakaryocyte growth and differentiation factor that is currently being investigated as a therapeutic for cancer patients undergoing myelosuppressive chemotherapy. We generated monoclonal antibodies (MAbs) specific for human thrombopoietin (hTPO) by genetic immunization using an hTPO expression plasmid and an adjuvant plasmid that encodes mouse granulocyte-macrophage colony-stimulating factor (GM-CSF) and interleukin-4 (IL-4). All genetically immunized mice exhibited a high humoral immune response. Splenocytes from these mice were used to generate hybridomas. Two MAbs, designated 2B9A10 and 4C16B15 (of IgG1 and IgG3 isotypes, respectively), were subsequently selected and produced. They specifically recognized and precipitated recombinant hTPO produced by mammalian cells and were effective in sandwich enzyme-linked immunosorbent assays (ELISAs) for hTPO quantitation. Our results demonstrate that these MAbs should be useful for purification and quantitation of hTPO in clinical and laboratory settings.
authors.affiliation: Research and Development Center, Aprogen Inc., Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejon, South Korea.
authors.forename: Nam-Kyu
authors.initials: NK
authors.lastname: Lim
authors.forename: Jung-Hwan
authors.initials: JH
authors.lastname: Kim
authors.forename: Se-Yeon
authors.initials: SY
authors.lastname: Kim
authors.forename: Hyun-Jung
authors.initials: HJ
authors.lastname: Kang
authors.forename: Keun-Soo
authors.initials: KS
authors.lastname: Kim
authors.forename: Sangyoon
authors.initials: S
authors.lastname: Lee
authors.forename: Hyo Jeong
authors.initials: HJ
authors.lastname: Hong
authors.forename: Kyung-Soo
authors.initials: KS
authors.lastname: Inn
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis* / Q000276:immunology / Q000302:isolation & purification; D000917:Antibody Formation; D016466:CHO Cells; D006224:Cricetinae; D003412:Cricetulus; D004797:Enzyme-Linked Immunosorbent Assay; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000235:genetics; D006801:Humans; D006825:Hybridomas / Q000276:immunology; D007074:Immunoglobulin G / Q000096:biosynthesis / Q000302:isolation & purification; D015847:Interleukin-4 / Q000235:genetics; D051379:Mice; D008807:Mice, Inbred BALB C; D010957:Plasmids / Q000276:immunology; D011994:Recombinant Proteins; D013154:Spleen / Q000166:cytology; D013926:Thrombopoietin / Q000032:analysis / Q000276:immunology*; D014611:Vaccination
chemical_list: D000911:Antibodies, Monoclonal; D007074:Immunoglobulin G; D011994:Recombinant Proteins; D015847:Interleukin-4; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D013926:Thrombopoietin