A Fc-CD80 fusion protein has a CD80 extracellular domain (ECD) linked to a C-terminal of an immunoglobulin Fc domain. The Fc-CD80 fusion protein can be used for the preparation of a conjugate, the conjugate including the Fc-CD80 fusion protein as a first component, and a second component containing a second effector molecule, the second component being located at an N-terminal of the first component. In addition, a conjugate including the Fc-CD80 fusion protein, a pharmaceutical composition including the Fc-CD80 fusion protein and/or the conjugate are effective for the treatment or prevention of cancerous diseases in individuals.

A pharmaceutical composition for enhancing radiation therapy, containing a fusion protein dimer is disclosed. The fusion protein dimer includes an IL-2 protein and a CD80 protein. A method of radiation therapy for cancer, using the composition is also disclosed. The composition for enhancing radiation therapy may increase the effect of radiation therapy in cancer treatment.

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 disclosure provides methods of administering fusion proteins comprising the extracellular domain of human cluster of differentiation 80 (CD80) and the fragment crystallizable (Fc) domain of human immunoglobulin G1 (IgG1) to a subject in need thereof, for example, a cancer patient.

The present disclosure provides a high-throughput screening system and method for identification of novel drugs and drug targets. The method enables large-scale analysis of interactions between allogeneic pairs of target cells and immune cells by using an immune-bridge protein, library of guide RNA, and/or 3D tumor model.

The present invention relates to a peptide compound of PDL2 selected from a peptide fragment, a functional homologue, and a functional analogue, as well as to a nucleic acid, such as DNA or RNA, encoding the peptide compound, a vector, such as a virus vector, and a host cell, such as mammalian cell, comprising the vector. The peptide compound, nucleic acid, vector and host cell of the present invention are in particular, useful for the treatment or prevention of a cancer characterized by expression of PDL2.

The present disclosure provides variant immunomodulatory polypeptides, and fusion polypeptides comprising the variant immunomodulatory peptides. The present disclosure provides T-cell modulatory multimeric polypeptides, and compositions comprising same, where the T-cell modulatory multimeric polypeptides comprise a variant immunomodulatory polypeptide of the present disclosure. The present disclosure provides nucleic acids comprising nucleotide sequences encoding the T-cell modulatory multimeric polypeptides, and host cells comprising the nucleic acids. The present disclosure provides methods of modulating the activity of a T cell; the methods comprise contacting the T cell with a T-cell modulatory multimeric polypeptide of the present disclosure.

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

Provided herein are methods and compositions useful for treating PDL1 and/or PDL2 positive cancers through adoptive cell transfer of T cells genetically engineered to express a PD1-specific chimeric antigen receptor. Co-stimulatory domains such as Dap 10 may be included to enhance efficacy.

The present invention relates to novel regulatory T cell proteins. One protein, designated PD-L3, resembles members of the PD-L1 family, and co-stimulates αCD3 proliferation of T cells in vitro. A second, TNF-like, protein has also been identified as being upregulated upon αCD3/αGITR stimulation. This protein has been designated T.sup.reg-sTNF. Proteins, antibodies, activated T cells and methods for using the same are disclosed.

In particular methods of using these proteins and compounds, preferably antibodies, which bind or modulate (agonize or antagonize) the activity of these proteins, as immune modulators and for the treatment of cancer, autoimmune disease, allergy, infection and inflammatory conditions, e.g. multiple sclerosis is disclosed