The present disclosure provides methods of preparing immune cells, e.g., T cells and/or NK cells, comprising contacting the cells with programmable cell-signaling scaffolds in a medium comprising at least about 5 mM potassium ion. In some aspects, the methods disclosed herein increase the number of less-differentiated cells in the population of cells. In some aspects, the cultured cells are engineered, e.g., to comprise a chimeric antigen receptor (CAR) or an engineered T cell receptor (TCR). In some aspects, the cells are administered to a subject in need thereof.

The present disclosure is directed, in some embodiments, to methods and compositions of comprising a cell having a non-internalizing receptor, and a nanoparticle surface-modified with a ligand that binds to the non-internalizing receptor.

The present invention provides an engineered immune cell targeting BCMA and use thereof. In particular, the present invention provides a CAR specifically targeting BCMA, the CAR comprising an antigen-binding domain which is an S-derived scFv, an antibody heavy chain variable region as shown in SEQ ID NO: 9 and an antibody light chain variable region as shown in SEQ ID NO: 10. The present invention also provides a CAR-T cell comprising the CAR, a double CAR- and CAR-T cell comprising the S-derived scFv, and related use thereof. Compared to CAR-T cells constructed using other scFvs, the constructed CAR-T cell of the present invention has a better killing effect and tumor elimination capability.

A chimeric antigen receptor that specifically binds to a CD300c antigen or a receptor thereof, immune cells expressing the same, and uses thereof are disclosed. The chimeric antigen receptor that specifically binds to a CD300c antigen or a receptor thereof is able to specifically recognize cancer cells expressing the CD300c antigen or the CD300c receptor so that growth, metastasis, development, and the like of cancer can be suppressed in a direct and effective manner. Thus, it is expected that the chimeric antigen receptor can be effectively used as an immunotherapeutic agent for various cancers.

Provided herein are antibodies and antigen-binding portions thereof that bind to tumor endothelial marker 1 (TEM1), as well as methods of using the disclosed antibodies and antigen-binding portions thereof, including methods of treating cancer, reducing tumor growth, reducing tumor metastasis, and/or reducing tumor-associated fibrosis in a subject in need thereof.

Provided herein is the use of bryostatin agents to selectively enhance expression, translocation and/or cell surface presentation of an antigen in target cells of interest to modulate immunogenicity of the target cells. Aspects of the methods include, administering an effective amount of a bryostatin agent to a subject to modulate immunogenicity of target cells. The subject methods include a method of treating cancer, including administering to a subject an effective amount of a bryostatin agent to enhance cell surface antigen or neoantigen presentation on target cells of the subject, and administering to the subject a therapeutically effective amount of a therapeutic agent that specifically binds the cell surface antigen to treat the subject for cancer. Aspects of the subject methods also include use of the bryostatin agents to sensitize the target cells to clearance by the subject's immune system.

The present disclosure is directed, in some embodiments, to methods and compositions of comprising a cell having a non-internalizing receptor, and a nanoparticle surface-modified with a ligand that binds to the non-internalizing receptor.

Provided herein are methods, kits and reagents for analyzing attributes of engineered immune cells, such as CAR T cells. For example, provided herein are methods of determining the amount or percentage of residual TCRαβ+ CAR T cells in allogeneic CAR T cell drug product and characterizing other important attributes of CAR T cell drug product.

A chimeric antigen receptor, containing a ligand binding domain, a transmembrane domain, a co-stimulatory domain, and an intracellular signaling domain, the co-stimulatory domain containing CD94 and/or LTβ intracellular regions. The present invention further relates to engineered immune cells containing such a chimeric antigen receptor, and uses thereof in the treatment of diseases, such as cancer, autoimmune diseases, and infections.

Provided is an immune effector cell targeting FAP and another tumor-associated antigen, which can improve a tumor microenvironment, kill tumor cells, and can be used to treat tumors.