title: A new proliferation-associated nuclear antigen detectable in paraffin-embedded tissues by the monoclonal antibody Ki-S1.
abstract: A monoclonal antibody (Ki-S1) has been raised that reacts with the nuclei of proliferating cells. The antigen recognized is resistant to formalin fixation and can be detected in frozen tissues as well as in routinely processed specimens. In immunohistochemistry, nuclear staining can be seen in those tissues and cellular compartments known to be actively proliferating. Peripheral blood lymphocytes are negative but show a strong increase in antigen expression after mitogen stimulation. Flow cytometric determination of DNA content and antigen expression revealed negativity of G0 cells and positivity of G1 to G2/M cells. A cytoplasmic co-reactivity, not associated with proliferation, was confined to Langerhans islands of the pancreas. The nuclear localized antigen has a molecular mass of 160 kd and therefore seems to be different from all other known immunohistochemical markers of proliferating cells. We conclude that the monoclonal antibody Ki-S1 might provide a useful tool for studying cell proliferation in situ under normal and pathological circumstances.
authors.affiliation: Institute of Pathology and Hematopathology, University of Kiel, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Kreipe
authors.forename: H J
authors.initials: HJ
authors.lastname: Heidebrecht
authors.forename: S
authors.initials: S
authors.lastname: Hansen
authors.forename: W
authors.initials: W
authors.lastname: Röhlk
authors.forename: M
authors.initials: M
authors.lastname: Kubbies
authors.forename: H H
authors.initials: HH
authors.lastname: Wacker
authors.forename: M
authors.initials: M
authors.lastname: Tiemann
authors.forename: H J
authors.initials: HJ
authors.lastname: Radzun
authors.forename: R
authors.initials: R
authors.lastname: Parwaresch
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis; D001324:Autoantigens / Q000032:analysis* / Q000276:immunology; D006801:Humans; D007202:Indicators and Reagents; D008213:Lymphocyte Activation; D051379:Mice; D008970:Molecular Weight; D009687:Nuclear Proteins / Q000032:analysis* / Q000276:immunology; D016612:Paraffin Embedding; D018809:Proliferating Cell Nuclear Antigen
chemical_list: D000911:Antibodies, Monoclonal; D001324:Autoantigens; D007202:Indicators and Reagents; D009687:Nuclear Proteins; D018809:Proliferating Cell Nuclear Antigen