Abstract: MAGE-A1 specific T cell receptors (TCRs) are provided. Accordingly, there is provided a TCR comprising a TCR ? chain as set forth in SEQ ID NO: 1 having at least one mutation at an amino acid position selected from the group consisting of S189, G125, W55 and Y56; and/or a TCR ? chain as set forth in SEQ ID NO: 2 having at least one mutation at an amino acid position selected from the group consisting of S32, S109 and T63, the TCR binds a MAGE-A1 peptide as set forth in SEQ ID NO: 25. Also provided are polynucleotides encoding the TCR and T cells expressing same and methods of use thereof.

Abstract: The present invention relates to methods and systems for increasing the affinity of a T cell receptor (TCR) to its ligand by subjecting the TCR gene to somatic hypermutation. The present invention further relates to use of affinity maturated TCRs to create T cells reactive against a selected antigen.

Abstract: The present invention relates to methods and systems for increasing the affinity of a T cell receptor (TCR) to its ligand by subjecting the TCR gene to somatic hypermutation. The present invention further relates to use of affinity maturated TCRs to create T cells reactive against a selected antigen.

Abstract: The present invention pertains to a novel cell based tumor vaccine platform. The invention provides a method for modifying antigen presenting cells (APCs) to present both MHC class I and/or MHC class II peptides in context of improved peptide presentation protein complexes in order to increase activation of a patient's immune response. In this invention, an MHC II mRNA dendritic cell based vaccine platform was developed to activate CD4+T cells in patients and to enhance the anti-tumor response. The invariant chain (Ii) was modified and the semi-peptide CLIP was replaced with an MHCII binding peptide sequences of tumor associated antigens. These chimeric MHC II constructs are presented by APCs and induce proliferation of tumor specific CD4+T cells. The invention provides the constructs, proteins, nucleic acids, recombinant cells, as well as medical applications of these products.

Abstract: The present invention relates to methods and systems for increasing the affinity of a T cell receptor (TCR) to its ligand by subjecting the TCR gene to somatic hypermutation. The present invention further relates to use of affinity maturated TCRs to create T cells reactive against a selected antigen.