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The FASEB Journal, Vol 6, 2990-2995, Copyright © 1992 by The Federation of American Societies for Experimental Biology

RESEARCH COMMUNICATIONS

Production of a monoclonal antibody to an attachment protein derived from human cementum

H Arzate, SW Olson, RC Page, AM Gown and AS Narayanan
Department of Pathology, University of Washington, Seattle 98195.

Cementum is the mineralized structure that covers the surface of the roots of teeth; it serves as the attachment site for collagen fibers of adjacent soft connective tissues. Very little is known about how cementum formation is regulated or how it affects other periodontal structures. We have raised a monoclonal antibody that may aid in studies to determine the biology and function of cementum. Mice were immunized with a 55-kDa attachment protein partially purified from human cementum and a monoclonal antibody, H166, was produced. Incubation of tissue sections with this antibody and fluorescein isothiocyanate-conjugated secondary antibody revealed that it immunostains cementum but not dentin, gingiva, or periodontal ligament. Alveolar bone did not bind the antibody, although a few paravascular cells were positive. Long bones, kidney, liver, skin, and several other tissues were negative. Protein fractions separated from cementum extracts by binding to immobilized H166 column contained 55-, 49-, 39-, 29- to 31-, and 23- to 26-kDa components that cross-reacted with the antibody in Western blots; these components were previously shown to be derived from a common precursor. We conclude that the antibody recognizes a group of proteins related to 55-kDa attachment protein in cementum. Our data show that the antibody could serve as a marker for cementum.


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Copyright © 1992 by The Federation of American Societies for Experimental Biology.