Novel therapeutic immunotherapy compositions comprising at least two vectors, each vector encoding a functional CAR, whereby the combination of vectors results in the expression of two or more non-identical binding domains, wherein each vector encoded binding domain(s) are covalently linked to a transmembrane domain and one or more non-identical intracellular signaling motifs are provided herein as well as are methods of use of same in a patient-specific immunotherapy that can be used to treat cancers and other diseases and conditions.

The invention relates to an expression construct for the expression of polypeptides in host cells using alternative splicing. The expression construct can be used for the expression of polypeptides such as antibodies, antibody fragments and bispecific antibodies by expressing the gene products required for protein expression at the ratio leading to the highest titres or the best product quality profile.

The present invention provides a genetically-modified T cell comprising in its genome a modified human T cell receptor alpha gene. The modified T cell receptor alpha gene comprises an exogenous sequence of interest inserted into an intron within the T in cell receptor alpha gene that is positioned 5 upstream of TRAC exon 1. The exogenous sequence of interest can comprise an exogenous splice acceptor site and/or a poly A signal, which disrupts expression of the T cell receptor alpha subunit. The sequence of interest can also include a coding sequence for a polypeptide, such as a chimeric antigen receptor. Additionally, the endogenous splice donor site and the endogenous splice acceptor site flanking the intron are unmodified and/or remain functional. The invention further provides compositions and methods for producing the genetically-modified cell, and populations of the cell, and methods for the treatment of a disease, such as cancer, using such cells.

Cancer immunotherapy using genetically engineered NK cells is enhanced by expression of recombinant co-stimulatory molecules to deliver co-stimulatory signals to a recipient host's immune cells to enhance an immune response.

Methods and compositions are provided for editing the genome of a cell without the use of an exogenously supplied nuclease. Aspects of the methods include contacting a cell with a targeting vector comprising nucleic acid sequence to be integrated into the target locus, where the cell is not also contacted with a nuclease. In addition, reagents, devices and kits thereof that find use in practicing the subject methods are provided.

Cancer immunotherapy using genetically engineered NK cells is enhanced by expression of recombinant co-stimulatory molecules to deliver co-stimulatory signals to a recipient host's immune cells to enhance an immune response.

Disclosed is a new process for the production of recombinant proteins, by transient transfection of suspension-grown human embryonic kidney cells (293 cell line and its genetic variants) with an expression vector, using polyethylenimine (PEI) as a transfection reagent. In a preferred embodiment, the process uses 293E cells expressing the Epstein-Barr virus (EBV) EBNA 1 protein, in combination with an oriP-based episomal expression vector having an improved cytomegalovirus expression cassette comprising the CMV5 promoter. The process combines in a single step the cell growth, transfection and protein expression, is carried out without changing the culture medium, and allows to achieve high expression levels in a short period of time. The process may be carried out in a serum-free, low-protein culture medium, is easily scalable, compatible with continuous production processes, and fully adapted to high-throughput production of milligram quantities of recombinant proteins.

Provided herein are T-cell receptors (TCRs) that when expressed recombinantly on the surface of a T cell are able to recognize the MAGE-B2-derived peptide GVYDGEEHSV (SEQ ID NO: 1) when presented by HLA-A*02:01 sufficiently to activate the recombinant T cell. Certain TCRs provided herein also are able to recognize the MAGE-A4-derived peptide GVYDGREHTV (SEQ ID NO:2) sufficiently to activate the recombinant T cell. Importantly, exemplary TCRs provided herein were thoroughly screened for lack of cross-reactivity with similar peptides that may be presented by normal cells or tissue and for alloreactivity.

The invention relates to an expression system comprising polynucleotides encoding proteins, wherein the expression system comprises a first polynucleotide encoding at least one protein, peptide or variant thereof, which induces a T cell response, and a second polynucleotide encoding at least one protein, peptide or variant thereof, which induces an anti-pathogenic B cell response. The invention further relates to protein mixtures encoded by the expression system and cells comprising the expression system or the protein mixture and pharmaceutical compositions comprising the expression system or the protein mixture.

Novel therapeutic immunotherapy compositions comprising at least two vectors, each vector encoding a functional CAR, whereby the combination of vectors results in the expression of two or more non-identical binding domains, wherein each vector encoded binding domain(s) are covalently linked to a transmembrane domain and one or more non-identical intracellular signaling motifs are provided herein as well as are methods of use of same in a patient-specific immunotherapy that can be used to treat cancers and other diseases and conditions.