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-independent T-Cell Activation against Hodgkin's Lymphoma Cells in the Presence of Soluble CD301
Klinik 1 für Innere Medizin, Labor Tumorgenetik, Universität zu Köln, D-50924 Köln [A. H., C. H., R. S., T. T., V. D., H. A.], and Evangelisches Krankenhaus Köln-Kalk, D-51103 Köln [C. P.], Germany
Hodgkin's lymphoma patients fail to establish an efficient cellular response against CD30+ Hodgkin/Reed-Sternberg cells. An impaired T-cell receptor/CD3-
-mediated activation of T cells is thought to be involved in this situation. We here present a chimeric anti-CD30 receptor that mediates MHC and T-cell receptor/CD3-
-independent T-cell activation against CD30+ lymphoma cells even in the presence of soluble CD30. The receptor consists of the binding domain of the monoclonal antibody HRS3 and the signaling unit of the Fc
RI-receptor
-chain. After expression in MD45 T cells, receptor cross-linking with immobilized anti-idiotypic monoclonal antibody and CD30+ cells, respectively, results in increased interleukin 2 secretion and specific cytolysis of CD30+ Hodgkin's lymphoma cells. Soluble CD30 in concentrations up to 6000 units/ml did not interfere with cellular activation induced by membrane-bound antigen. This demonstrates the feasibility of the chimeric anti-CD30-scFv-
receptor in CD30+ lymphoma cell targeting, even in the presence of as high concentrations of soluble CD30 as are found in patients during progression of the disease.
1 This study was supported by grants from the Deutsche Forschungsgemeinschaft through SFB502.
2 To whom requests for reprints should be addressed, at Klinik I für Innere Medizin, Labor für Tumorgenetik, Universität zu Köln, Josef-Stelzmann-Strasse 9, D-50924 Köln, Germany. Phone: 49-221-478-4130; Fax: 49-221-478-6383; E-mail: hinrich.abken@medizin.uni-koeln.de.
Received 11/ 7/97. Accepted 1/26/98.
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