Methods and compounds for conferring site-specific or local immune privilege.

Provided herein are inhibitory chimeric antigen receptor compositions and cells comprising such compositions. Also provided are methods of using inhibitory chimeric antigen receptors and cells.

Provided in the present disclosure are a bifunctional protein which can bind to PD-1 (programmed death receptor-1) and TGF-β (transforming growth factor-β), the medical use of the bifunctional protein, and a preparation method therefor.

Provided is application of chimeric antigen receptor (CAR)-modified T (CART) cells in preparing drugs for cancer treatment, the CART cells contain an artificially-introduced costimulatory signal transduction domain, and the CART cell does not contain an artificially-introduced first signal transduction domain.

The present invention relates to a chimeric costimulatory antigen receptor (CoStAR) useful in adoptive cell therapy (ACT), and cells comprising the CoStAR. The CoStAR can act as a modulator of cellular activity enhancing responses to defined antigens. The present invention also provides CoStAR proteins, nucleic acids encoding the CoStAR and therapeutic uses thereof.

PD1-CD70 fusion proteins are provided. Accordingly, there is provided a PD1-CD70 fusion protein comprising a single amino acid linker between the PD1 and the CD70. Also there is provided a PD1-CD70 fusion protein, wherein the PD1 amino acid is 123-166 amino acids in length and/or wherein the PD1 amino acid sequence comprises SEQ ID NO: 2 and/or wherein the fusion protein is in a form of at least a homo-trimer. Also provided are polynucleotides and nucleic acid constructs encoding the PD1-CD70 fusion protein, host-cells expressing the PD1-CD70 fusion protein and methods of use thereof.

Compositions and methods relating to regulatable chimeric antigen receptors (RCARs), where the intracellular signaling or proliferation of the RCAR can be controlled to optimize the use of an RCAR-expressing cell to provide an immune response, are provided. For example, a RCAR can comprise a dimerization switch that, upon the presence of a dimerization molecule, can couple an intracellular signaling domain to an extracellular recognition element, e.g., an antigen binding domain, an inhibitory counter ligand binding domain, or costimulatory ECD domain. An RCAR can be engineered to include an appropriate antigen binding domain that is specific to a desired antigen target and used in the treatment of a disease.

The present invention provides a chimeric antigen receptor and natural killer cells expressing the same, and particularly, a chimeric antigen receptor (CAR) which includes an intracellular signaling domain including the whole or a portion of an OX40 ligand (CD252), thereby having excellent effects of increasing anticancer activity of immune cells, and immune cells expressing the same.

Disclosed are a natural killer (NK) cell expressing an anti-cotinine chimeric antigen receptor (CAR) specifically binding to cotinine, and a cell therapeutic agent containing the NK cell. The CAR-expressing NK cell which specifically binds cotinine, can effectively move to tumor tissue, regardless of the kind of cancer, depending on the binding substance bound to cotinine. Therefore, the natural killer cell can be usefully employed as a gene therapy exhibiting a highly efficient anticancer effect.

The present invention relates to a novel chimeric antigen receptor and to a pharmaceutical composition for preventing or treating containing the same.