Disclosed herein are non-human animals (e.g., rodents, e.g., mice or rats) genetically engineered to express a humanized T cell co-receptor (e.g., humanized CD4 and/or CD8 (e.g., CD8α and/or CD8β)), a human or humanized T cell receptor (TCR) comprising a variable domain encoded by at least one human TCR variable region gene segment and/or a human or humanized major histocompatibility complex that binds the humanized T cell co-receptor (e.g., human or humanized MHC II (e.g., MHC II α and/or MHC II β chains) and/or MHC I (e.g., MHC Iα) respectively, and optionally human or humanized β2 microglobulin). Also provided are embryos, tissues, and cells expressing the same. Methods for making a genetically engineered animal that expresses at least one humanized T cell co-receptor (e.g., humanized CD4 and/or CD8), at least one humanized MHC that associates with the humanized T cell co-receptor (e.g., humanized MHC II and/or MHC I, respectively) and/or the humanized TCR are also provided. Methods for using the genetically engineered animals that mount a substantially humanized T cell immune response for developing human therapeutics are also provided.

Disclosed are methods of identifying immunosuppressive T.sub.R1 regulatory T cells, including in methods of diagnosing the presence of immune tolerance, methods of producing immunosuppressive regulatory T cells, and methods of eliciting immune tolerance in a subject. These methods include screening T cells to detect Eomes.sup.+IL-10.sup.+ T cells or expressing recombinant Eomes in T cell populations to generate immunosuppressive regulatory T cells.

The invention relates to proteins that contain the CD4 domain 1 and the CD4 domain 2 (CD4 D1D2), wherein the CD4 D1D2 contains one or more mutations compared to wild-type human CD4 D1D2, and to methods of using the proteins for treating a human immunodeficiency virus (HIV) infection in a subject.

The disclosure relates to polypeptides, vaccines and pharmaceutical compositions that find use in the prevention or treatment of Coronaviridae or SARS-CoV-2 infection. The disclosure also relates to methods of treating or preventing Coronaviridae or SARS-CoV-2 infection in a subject. The polypeptides and vaccines comprise B cell epitopes and cytotoxic and helper T cell epitopes that are immunogenic in a high percentage of subjects in the human population.

The present disclosure relates to chimeric engulfment receptor molecules, host cells modified to include the phagocytic engulfment molecules, and methods of making and using such receptor molecules and modified cells.

Provided are a chimeric antigen receptor that targets B-cell maturation antigen (BCMA), and a use thereof, wherein immune cells expressing the chimeric antigen receptor can be effectively used in the treatment and prevention of B cell-related diseases, particularly multiple myeloma or non-Hodgkin's lymphoma.

The present invention provides a chimeric antigen receptor (CAR) system comprising; (i) a receptor component comprising a antigen binding domain and a first binding domain; and (ii) a signalling component comprising a signalling domain and a second binding domain which binds the single domain binder of the first binding domain of the receptor component wherein either the first or second binding domains comprise a single domain binder, and wherein, binding of the first and second binding domains is disrupted by the presence of an agent, such that in the absence of the agent, the receptor component and the signalling component heterodimerize and binding of the antigen binding domain to antigen results in signalling through the signalling domain; whereas in the presence of the agent, the receptor component and the signalling component do not heterodimerize and binding of the antigen binding domain to antigen does not result in signalling through the signalling domain.

Chimeric transmembrane immunoreceptors (CAR) targeted to PSCA are described.

Safe, rapid and efficient methods for producing antigen-specific T cells recognizing human papilloma virus or HPV antigens.

A trifunctional molecule comprising a target-specific ligand, a ligand that binds a protein associated with the TCR complex and a T cell receptor signaling domain polypeptide is provided. The ligand that binds a protein associated with a TCR complex is UCHT1 with a Y182T mutation. Engineering T cells with this novel receptor engenders antigen specific activation of numerous T cell functions, including cytokine production, degranulation and cytolysis.