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.

A humanized CD 19 antibody, and a chimeric antigen receptor thereof, an immune cell thereof and the use thereof are provided. The humanized CD19 antibody is based on a FMC63 chimeric antibody, which is subjected to humanization modification. A CAR-T and a dual CAR-T cell constructed based on the humanized antibody and the related use thereof are also provided. Compared with a CAR-T cell constructed by using FMC63, the CAR-T cell constructed based on the humanized antibody has higher killing effect and tumor removal ability.

The present disclosure provides a dendric cell tumor vaccine comprising a chimeric antigen receptor for activating the dendritic cell and a tumor antigen. The present disclosure also provides compositions and methods of making the dendritic cell tumor vaccine, and the methods of using the dendritic cell tumor vaccine to treat cancer.

A vector comprising a first polynucleotide encoding a FOXP3 polypeptide and a second polynucleotide encoding a chimeric antigen receptor (CAR), wherein the CAR comprises an antigen recognition domain which specifically binds to a human leukocyte antigen (HLA), wherein the first polynucleotide and the second polynucleotide are operably linked to the same promoter, and wherein the first polynucleotide is upstream of the second polynucleotide.

The present disclosure relates to a novel platform for immunotherapy which combines CAR engineered γδ T cells with armoring interleukin IL-18 that can be expressed constitutively or inducibly, or with a chimeric cytokine receptor comprising the endodomain of the IL-18 receptor. The system/platform and the associated methods according to the present disclosure have advantages such as increased immune cell potency and persistence for therapeutic applications.

Embodiments of the present disclosure relate to compositions and methods of enhancing lymphocytes' ability to treat cancer patients. Embodiments relate to a polynucleotide comprising a nucleic acid encoding a chimeric antigen receptor (CAR), a nucleic acid encoding an Oxygen-Dependent Degradation domain (ODD), and a nucleic acid encoding one or multiple sequences of Hypoxia-Response Element (HRE).

The present disclosure provides a CAR comprising a tumor antigen binding domain, a transmembrane domain, and an intracellular domain comprising an intracellular signaling domain of an interleukin-9 receptor alpha (IL9Ra), and modified cell(s), i.e., immune cell(s) or precursor cell(s) thereof, engineered to express the CAR. Also provided are methods and uses of the modified cells, e.g., for treating at least one sign and/or symptom of cancer. Related nucleic acids, vectors, and pharmaceutical compositions are also provided.

The present invention relates to compositions and methods for the treatment of lupus, particularly systemic lupus erythematosus. The present invention involves, amongst other things, a binding protein comprising a T cell receptor (TCR) α-chain variable (Vα or Valpha) domain and a TCR β-chain variable (Vβ or Vbeta) domain, wherein the binding protein is capable of binding to a complex of a fragment of a Smith protein and an HLA-DR15 or HLA-DR3 molecule.

The present invention relates to a cell which comprises a chimeric antigen receptor (CAR) comprising a binding domain which binds a first epitope of a tumour antigen; and a polynucleotide which encodes a bi-specific protein which comprises a first binding domain which binds a second epitope of said tumour antigen; and a second binding domain which binds a cell surface antigen. The present invention also provides CAR systems, nucleic acids, vectors, pharmaceutical compositions and pharmaceutical compositions for use in the treatment and/or prevention of disease.

Herein are provided anti-CD22 single domain antibodies (sdAb) prepared by immunizing a llama with the extracellular domain of the predominant human CD22 isoform. By constructing a library of the heavy chain repertoire generated, VHH antibodies specific to the immunogen were isolated. The 27 example antibodies initially produced comprise CDR1, CDR2, and CDR3 sequences corresponding, respectively to SEQNOs: 1-3, 4-6, 7-9, 10-12, 13-15, 16- 18, 19-21, 22-24, 25-27, 28-30, 31-33, 34-36, 37-39, 40-42, 43-45, 46-48, 49-51, 52-54, 55- 57, 58-60, 61-63, 64-66, 67-69, 70-72, 73-75, 75-78, and 79-81; and related sequences. Also provided are multivalent antibodies comprising any one of the sdAbs, including bispecific T-cell engagers, bispecific killer cell engagers (BiKEs), and trispecific killer cell engagers (TriKEs). Also described are chimeric antigen receptors (CARs) for CAR-T therapy comprising any one of the aforementioned sdAbs. Uses of these molecules in the treatment of cancer are also described.