The present disclosure provides compositions and methods for boosting, augmenting or enhancing the efficacy of the adoptive cellular immunotherapy by using modified T cells expressing an antigen binding protein in conjunction with modified cells (such as hematopoietic progenitor cells, modified human immune system cells or a combination thereof) expressing the antigen specifically bound by the antigen binding protein of the modified T cells.

Embodiments of the disclosure include compositions and methods effective for immunotherapy, such as for cancer. The embodiments include cells that recognize a combination of two signals or three signals present at the tumor microenvironment. In certain embodiments, the signals for antigen stimulation, co-stimulation, and cytokine signaling act through separate molecules, although in certain embodiments the signals for antigen stimulation and co-stimulation are transmitted through the same molecule.

Disclosed herein are cells that are immune cells or precursor cells thereof, which cells recombinantly express a chimeric antigen receptor (CAR), and a dominant negative form of an inhibitor of a cell-mediated immune response of the immune cell, wherein the CAR binds to a cancer antigen. Also disclosed herein are T cells that recognize and are sensitized to a cancer antigen, which T cells recombinantly express a dominant negative form of an inhibitor of a T cell-mediated immune response. Additionally provided are methods of using such cells to treat cancer in a subject in need thereof.

A immunogenic composition is provided for use in methods for treating or preventing the development of a cancer, comprising a nucleic acid sequence encoding a cancer antigen and a nucleic acid sequence encoding fibroblast activation protein (FAP). In one embodiment, the composition comprises a vector comprising a first expression cassette comprising a nucleic acid sequence encoding an antigen of a, operatively linked to an expression control sequence that directs the expression of the antigen in a mammalian host cell. The composition further contains a vector comprising a second expression cassette comprising a nucleic acid sequence encoding fibroblast activation protein (FAP) operatively linked to an expression control sequence directing the expression of FAP in a mammalian host cell. In one embodiment, the cancer is one in which tumor progression depends on the fibroblasts expressing fibroblast activation protein (FAP).

The present invention relates generally to a population of stem cells (e.g., iPSCs or HSCs) that comprise nucleic acids encoding a T cell receptor and a chimeric antigen receptor directed to multiple distinct antigenic determinants, for example two distinct tumour antigenic determinants. The present invention is also directed to a population of T cells that co-express a T cell receptor and a chimeric antigen receptor directed to multiple distinct antigenic determinants, such as two distinct tumour antigenic determinants. The cells of the present invention can be derived from chosen donors whose HLA type is compatible with significant sectors of the populations, and are useful in a wide variety of applications, in particular in the context of the therapeutic treatment of neoplastic conditions.

The present invention provides a complex for use in the prevention and/or treatment of cancer, the complex comprising a) a cell penetrating peptide, b) at least one antigen or antigenic epitope, and c) at least one TLR peptide agonist, wherein the components a)-c) are covalently linked. In particular, compositions for use in the prevention and/or treatment of cancer, such as a pharmaceutical compositions and vaccines are provided.

The invention generally relates to immunotherapy using immune cells such as chimeric antigen receptor (CAR)-engineered T cells. In particular, the invention relates to immunotherapy using chimeric antigen receptor (CAR)-engineered T cells that carry a novel, IgG3-Hinge-based spacer domain, allowing a finely modulated response to target antigens. In addition, the invention relates to the introduction of one or more IgG3-Hinge-based multi-function sites (MFs) into CARs and other immunoreceptors, allowing purification, stimulation, expansion and depletion of CAR T cells. The invention includes also the sequence of an antibody targeting this motif, allowing the execution of the before-mentioned functions.

B-cell maturation antigen (BCMA) is expressed on malignant plasma cells. The present invention provides novel bispecific antibodies (bsAbs) that bind to both BCMA and CD3 and activate T cells via the CD3 complex in the presence of BCMA-expressing tumor cells. In certain embodiments, the bispecific antigen-binding molecules of the present invention are capable of inhibiting the growth of tumors expressing BCMA. The bispecific antigen-binding molecules of the invention are useful for the treatment of diseases and disorders in which an upregulated or induced BCMA-targeted immune response is desired and/or therapeutically beneficial. For example, the bispecific antibodies of the invention are useful for the treatment of various cancers, including multiple myeloma.

The invention provides a vaccine composition comprising a flavivirus peptide comprising one or more CD8+ T cell C1 epitopes, wherein the peptide is attached to a nanoparticle.

The embodiments of the present disclosure relate to antigens of β-coronaviruses, preparation methods and uses thereof. The amino acid sequence of the antigen of the β-coronavirus includes an amino acid sequence arranged in a (A-B)-(A-B) pattern or an amino acid sequence arranged in a (A-B)-C-(A-B) pattern or an amino acid sequence arranged in a (A-B)-(A-B′) pattern or an amino acid sequence arranged in a (A-B)-C-(A-B′) pattern. The antigen of the β-coronavirus has a single-chain dimer structure. A single-chain dirtier expressed according to examples of the present disclosure is stable in content and has excellent immunogenicity as an antigen of a β-coronavirus, and a vaccine prepared by using the single-chain dimer as an antigen of a β-coronavirus can elicit high-titer neutralizing antibodies in mice.