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This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Rights and Permissions Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Link, B. K. Articles by Weiner, G. J. Search for Related Content PubMed PubMed Citation Articles by Link, B. K. Articles by Weiner, G. J. Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  Production and characterization of a bispecific IgG capable of inducing T-cell-mediated lysis of malignant B cells BK Link and GJ Weiner Department of Internal Medicine, University of Iowa College of Medicine, Iowa City. Bispecific monoclonal antibodies (bsabs) recognizing both CD3 and a tumor antigen can redirect T-cell-mediated cytotoxicity toward cells bearing that antigen. Such bsabs have been shown to be more effective than monospecific monoclonal antibodies (MoAbs) at preventing tumor growth in animal models of B-cell malignancy. The current studies describe the production and preliminary evaluation of a bsab designed to induce the lysis of malignant human B cells by human T cells. The bsab was obtained from a hybrid-hybridoma cell line produced by fusing OKT3-secreting hybridoma cells with hybridoma cells that secrete 1D10. 1D10 is an MoAb that recognizes an antigen found on a majority of malignant human B cells that has not been detected to a significant degree on normal resting or activated lymphocytes. High performance liquid chromatography (HPLC) was used to separate bsab from monospecific antibodies that were also present in the hybrid-hybridoma antibody product. The bsab was then evaluated in vitro for its ability to induce lysis of malignant B cells by activated T cells. The bsab consistently induced extensive lysis in vitro of 1D10 (+) cells, including both cell lines and cells obtained from patients with a variety of B-cell malignancies. No such effect was seen with activated T cells alone or activated T cells with monospecific antibody. No increased lysis was seen with 1D10 (-) cell lines. The bsab also mediated lysis of malignant B cells by autologous T cells. We conclude bsab containing an OKT3 arm and a 1D10 arm can induce T-cell-mediated lysis in a manner that is both potent and specific. This supports further evaluation of this bsab as a potential immunotherapy of B-cell malignancy. Volume 81, Issue 12, pp. 3343-3349, 06/15/1993 Copyright © 1993 by The American Society of Hematology CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: B. Jahrsdörfer, G. Hartmann, E. Racila, W. Jackson, L. Mühlenhoff, G. Meinhardt, S. Endres, B. K. Link, A. M. Krieg, and G. J. Weiner CpG DNA increases primary malignant B cell expression of costimulatory molecules and target antigens J. Leukoc. Biol., January 1, 2001; 69(1): 81 - 88. [Abstract] [Full Text]

	Copyright © 1993 by American Society of Hematology         Online ISSN: 1528-0020