Abstract
In this report the use of surface-linkage to expand the potential experimental and therapeutic applications of single chain antibody (scFv) constructs is reviewed. A strategy for the generation and functional characterization of surface-linked scFvs that bind selectively to the T-cell proteins CD3ε, CD28, and CD152 (CTLA-4) is described in detail. Experimental examples are provided of the use of these constructs to study the positive and negative regulation of T-cell activation and to manipulate the in vivo immunogenicity of tumor cells. In addition, a novel system for Simultaneous T-cell Activation and Retroviral Transduction (START) is described in which retroviral packaging cells are rendered mitogenic for T lymphocytes by combined expression of surface-linked scFvs. Finally, the use of random mutagenesis and yeast surface display to increase the affinity and functional efficacy of scFv constructs is demonstrated.
Original language | English (US) |
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Pages (from-to) | 77-90 |
Number of pages | 14 |
Journal | Journal of Immunological Methods |
Volume | 248 |
Issue number | 1-2 |
DOIs | |
State | Published - Feb 1 2001 |
Keywords
- CD152
- CD28
- CD3
- Co-stimulation
- Immunological tolerance
- Immunomodulation
- Monoclonal antibodies
- Neoplasia
- Protein engineering
- Retroviral gene transfer
- T-cell
- Transplantation
ASJC Scopus subject areas
- Immunology and Allergy
- Immunology