Biological characterization of human bone tumors |
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Authors: | A. Roessner J. Vassallo E. Vollmer G. Zwadlo C. Sorg E. Grundmann |
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Affiliation: | (1) Gerhard-Domagk-Institut für Pathologie, Westfälische Wilhelms-Universität Münster, D-4400 Münster, Federal Republic of Germany;(2) Abteilung für Experimentelle Dermatologie der Hautklinik, Westfälische Wilhelms-Universität Münster, D-4400 Münster, Federal Republic of Germany |
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Abstract: | Summary Seven giant cell tumors of bone and four malignant fibrous histiocytomas were studied immunohistochemically with different monoclonal antibodies to the mononuclear phagocyte system (MPS), to HLA-DR antigens, and to a proliferation-associated nuclear antigen (KI-67), in order to clarify the role of macrophages in these tumors. A part of the mononuclear cells stained positive with antibodies against the MPS. Antibody 25-F-9 against mature tissue macrophages showed the strongest reaction. The osteoclast-like giant cells also stained positive with this antibody. Fibroblast-like stromal cells, however, showed negative reactions to all antibodies against MPS cells. A double-labeling immunohistological technique was used to detect the proliferating cell population in these tumors. The fibroblast-like cells that were negative for MPS markers, were positively labeled with the monoclonal antibody Ki-67 against a proliferation-associated nuclear antigen, whereas a negative reaction to Ki-67 was seen in cells positive with antibodies to the MPS. These results support the concept that macrophages are a reactive population in these tumors, whereas the fibroblast-like mesenchymal cells are the proliferating tumor cells.Supported by Deutsche Forschungsgemeinschaft, grant no. 648 1/2 |
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Keywords: | Immunohistological techniques Monoclonal antibodies Mononuclear phagocyte system Malignant fibrous histiocytoma Giant cell tumor of bone |
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