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Monoclonal antibodies to ros 17/2.8 cells recognize antigens, some of which are restricted to osteoblasts and chondrocytes
Author(s) -
Perry Judith,
Gilligan Moira,
Green Elaine,
Docherty Hilary,
Heath David
Publication year - 1990
Publication title -
journal of bone and mineral research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.882
H-Index - 241
eISSN - 1523-4681
pISSN - 0884-0431
DOI - 10.1002/jbmr.5650050213
Subject(s) - antigen , population , bone marrow , monoclonal antibody , microbiology and biotechnology , osteoblast , biology , chemistry , cell culture , antibody , in vitro , pathology , immunology , medicine , biochemistry , genetics , environmental health
We have raised a panel of 15 monoclonal antibodies (MAbs) recognizing cell surface antigens of the rat osteoblast‐like cell line ROS 17/2.8. The MAbs were selected on the basis of preferential binding to ROS 17/2.8 cells compared to ROS 25/1 cells. Immunohistochemical studies of antigen localization on cryostat sections of rat calvaria, long bone, and soft tissues demonstrated that five of these MAbs, UBIM 1, 2, 3, 12, and 17, recognize antigens that are restricted to normal rat osteoblasts and chondrocytes. The antigens appear to be localized to the cell surface of the osteoblast, with no apparent staining of bone matrix in either undecalcified or decalcified sections. In vitro, these MAbs recognize cell surface antigens present on two additional cell lines, ROS 24/1 and Rat 2 cells, and on the adherent cell population cultured from rat long bone marrow. Of these MAbs, three (UBIM 1, 2, and 3) recognize high‐molecular‐weight antigens of M r 200,000‐225,000. This study has also identified cell surface antigens of ROS 17/2.8 cells that are not expressed by osteoblasts in vivo. MAbs UBIM 9 and 21 bind to marrow cells in long bone sections, to the 7‐day‐old nonadherent cell population from cultured marrow, and to lymphoid tissue in sections of spleen. Another four MAbs (UBIM 10, 11, 14, and 22) bind to a variety of cells and tissues both in vitro and in vivo. Studies of the interactions of this panel of MAbs with osteogenic tissues and cell lines may have an important impact on the understanding of osteoblast physiology