Article (Scientific journals)
Efficiency of T Cell Triggering by Anti-Cd3 Monoclonal Antibodies (Mab) with Potential Usefulness in Bispecific Mab Generation
Jacobs, Nathalie; Mazzoni, A.; Mezzanzanica, D. et al.
1997In Cancer Immunology, Immunotherapy, 44 (5), p. 257-64
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Keywords :
Bispecific antibody; immunotherapy; anti-CD3; T-cell receptor; cytotoxicity
Abstract :
[en] T cell triggering can be achieved by monoclonal antibodies (mAbs) specific for the CD3/TcR complex. In the presence of appropriate costimulation and/or progression factors, such triggering permits the generation of effector cells for immunotherapy protocols involving the redirection of T cell lysis against tumor cells by mAbs bispecific for anti-CD3/anti-tumor cells (bs-mAbs). Focusing our analysis on the clinically relevant bs-mAb OC/TR, we found that bs-mAbs generated with the same anti tumor specificity, but two other anti-CD3 mAbs, TR66 and OKT3, have the same and a significantly lower lytic potential, respectively, compared with that of OC/TR. To evaluate the relevance of the anti-CD3 component, we examined several anti-CD3 mAbs with respect to binding parameters and the ability to trigger T lymphocytes. Competitive binding assays suggested that all anti-CD3 mAbs recognized the same or overlapping epitopes, although mAbs BMA030 and OC/TR bound with lower avidity than did alpha CD3 (the bivalent anti-CD3 mAb produced by the hybrid hybridoma OC/TR). TR66 and OKT3, as determined by measurement of the affinity constants. In all lymphocyte populations examined, which included resting peripheral blood mononuclear cells (PBMC), activated PBMC and T cell clones, OKT3, BMA033 and OC/TR failed to mobilize Ca2+ without cross-linking, whereas alpha CD3, in both murine and murine-human chimeric versions, TR66 and BMA030, did not require cross-linking. The ability to induce CD3 modulation was associated in part with the induction of Ca2+ fluxes. Despite the differences in the behavior of these mAbs in triggering the events that precede proliferation, all of them ultimately led to expression of the IL-2 receptor and to proliferation in T cells in the presence of accessory cells. Our data suggest that anti-CD3 mAbs that bind more rapidly (strong Ca2+ mobilizers) and more tightly under physiological conditions are good candidates for retargeting T cells in the bs-mAb clinical application.
Disciplines :
Immunology & infectious disease
Oncology
Author, co-author :
Jacobs, Nathalie  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Anatomie et cytologie pathologiques
Mazzoni, A.
Mezzanzanica, D.
Negri, D. R.
Valota, O.
Colnaghi, M. I.
MOUTSCHEN, Michel  ;  Centre Hospitalier Universitaire de Liège - CHU > Département de médecine interne > Service des maladies infectieuses - médecine interne
Boniver, Jacques ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Anatomie et cytologie pathologiques
Canevari, Silvana;  Fondazione IRCCS Istituto Nazionale dei Tumori > Experimental Oncology Department
Language :
English
Title :
Efficiency of T Cell Triggering by Anti-Cd3 Monoclonal Antibodies (Mab) with Potential Usefulness in Bispecific Mab Generation
Publication date :
July 1997
Journal title :
Cancer Immunology, Immunotherapy
ISSN :
0340-7004
eISSN :
1432-0851
Publisher :
Springer Verlag
Volume :
44
Issue :
5
Pages :
257-64
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 03 September 2009

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