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The Journal of Immunology, Vol 133, Issue 1 495-501, Copyright © 1984 by American Association of Immunologists

ARTICLES

Strategies for production of monoclonal anti-idiotype antibodies against human B cell lymphomas

K Thielemans, DG Maloney, T Meeker, J Fujimoto, C Doss, RA Warnke, J Bindl, J Gralow, RA Miller and R Levy

Murine monoclonal antibodies (MAB) against the idiotype (Id) of B lymphocyte malignancies are powerful reagents for the study of these diseases, and are potentially useful for treatment. Different strategies for the production of these anti-Id MAB have been compared. Initially, the Id Ig from nonsecreting B cell tumors was "rescued" by human X mouse or human X human hybridization. These somatic cell hybridizations resulted in the secretion of human Ig in 10 and 100% of the fusions, respectively. In a second step, anti-Id MAB were produced by using the "rescued" Id Ig as immunogen. A more streamlined approach is based on a one-step procedure in which the tumor cell suspension is used as immunogen. This method of immunization, coupled with a four- layer ELISA, results in the detection of anti-Id MAB in a frequency of approximately 1% of the total hybrids. By using a pool of 10 different anti-Id MAB, each reactive with the tumor of one patient, we searched for idiotypic relatedness among a panel of 50 additional tumors. No cross-reactions were found, indicating that our current strategy results in the identification of unique idiotypic determinants among human B cell tumors. Idiotypic Ig can be found in the serum of patients with B cell tumors. Among groups of patients, there is a wide spectrum of serum Id levels, ranging from less than 0.01 microgram/ml to greater than 500 micrograms/ml.


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