title: Monoclonal antibodies to Ki-67 protein suitable for immunohistochemical analysis.
abstract: Detection of cell proliferation index is widely used in experimental and clinical research. Earlier it was shown that nuclear Ki-67 protein expression is strictly related to cell proliferation. It was revealed during all active phases of the cell cycle in mammals but was absent in G0 phase, so Ki-67 presence in cell nuclei reflects a potential growth fraction of whole cell population. The main area of Ki-67 antibody application is in immunocytochemical and immunohistochemical analyses. The aim of our work was to generate mouse monoclonal antibodies for Ki-67 antigen detection in mammalian tissues and in cultured cells. His-tagged fragment of Ki-67 expressed in bacteria was used as an antigen. Antibody-producing hybridoma cells were generated by standard procedure by fusing SP2/0 myeloma cells with splenocytes of immunized mice. Monoclonal antibodies were analyzed using paraffin-embedded human melanoma tissue samples and breast cancer cell line MCF-7. It was shown that generated anti-Ki-67 antibodies revealed proliferating cells in MCF-7 culture and after heat-induced epitope retrieval on paraffin sections of human melanoma tissue. In summary, generated antibodies could be useful for detection of proliferating cells in immunohistochemical and immunofluorescence studies of mammalian cells and tissues.
authors.affiliation: Department of Cell Signalling, Institute of Molecular Biology and Genetics, NAS of Ukraine, Kyiv, Ukraine.
authors.forename: Antonina
authors.initials: A
authors.lastname: Khoruzhenko
authors.forename: Viktoriya
authors.initials: V
authors.lastname: Kukharchuk
authors.forename: Olga
authors.initials: O
authors.lastname: Cherednyk
authors.forename: Iryna
authors.initials: I
authors.lastname: Tykhonkova
authors.forename: Galina
authors.initials: G
authors.lastname: Ovcharenko
authors.forename: Oksana
authors.initials: O
authors.lastname: Malanchuk
authors.forename: Valeriy
authors.initials: V
authors.lastname: Filonenko
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D001943:Breast Neoplasms / Q000276:immunology* / Q000378:metabolism / Q000473:pathology; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D006825:Hybridomas; D007124:Immunoenzyme Techniques; D019394:Ki-67 Antigen / Q000276:immunology*; D051379:Mice; D011994:Recombinant Proteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D014407:Tumor Cells, Cultured
chemical_list: D000911:Antibodies, Monoclonal; D019394:Ki-67 Antigen; D011994:Recombinant Proteins