A multispecific antibody is provided. The antibody comprising a first moiety, which binds and activates CD40, a second moiety, which specifically binds a dendritic cell (DC) and a third moiety comprising a modified Fc region of the multispecific antibody for enhancing specificity and affinity of binding to FcγRIIb and uses of same.

The present invention is based, in part, on the discovery of anti-SIGLEC-9 composition (e.g., monoclonal antibodies and antigen-binding fragments thereof), that regulate myeloid cell inflammatory phenotypes, such as suppressive myeloid cells, monocytes, macrophages, neutrophils, and/or dendritic cells, including polarization, activation, and/or function, and methods of using such anti-SIGLEC-9 compositions for therapeutic, diagnostic, prognostic, and screening purposes.

Isolated antigen binding molecules that specifically bind to a CLL-1 binding molecule are provided. The antigen binding molecules may be used in the methods provided herein.

Provided is an anti-CLL1 antibody and an application thereof. The variable region of the anti-CLL1 antibody includes the CDRs of SEQ ID NO: 1 to 6, SEQ ID NO: 5, and SEQ ID NO: 7 to 11 or SEQ ID NO: 12 to 17. The anti-CLL1 antibody of the present application has significant binding ability to both free and cell surface CLL1. After humanization, the affinity of the antibody to CLL1 is further improved, and it has important application prospect in the clinical diagnosis and/or treatment of tumors.

The present invention provides a chimeric antigen receptor having a structure of scFv(X)-(Y)CD 3zeta-MN.X comprises a tumor targeting antibody or a ligand or receptor capable of specifically binding to a tumor. Y is an intracellular region of a costimulatory receptor selected from ICOS, CD28, CD27, HVEM, LIGHT, CD40L, 4-1BB, OX40, DR3, GITR, CD30, SLAM, CD2, and CD226; M is an intracellular region of a gamma chain family cytokine receptor, the cytokine receptor being selected from IL2Ra, IL2Rb, IL4Ra, IL7Ra, IL9Ra, IL15Ra, and IL21Ra. N is an intracellular region of IL2Rg. The present invention further provides a CAR-T cell constructed from the recombinant expression vector of said chimeric antigen receptor, a preparation method therefor and the use thereof. The CAR-T cell of the present invention significantly improves tumor killing capacity and amplification capacity.

The invention relates to the field of diagnostic immunology. Provided are means and methods for multiparameter cytometry-based leukocyte subsetting, which is advantageously used for the monitoring of the immune status of a subject, and/or for monitoring the effects of an immune modulatory treatment. Provided among others is a reagent composition comprising antibodies conjugated to a detectable label, the conjugated antibodies being directed against the following combination of markers: CD141, HLA-DR, CD16, CD33, CD300e, CD303 and CD14, wherein the antibodies directed against CD300e and CD303 may be conjugated to the same label.

Compositions, e.g., compositions comprising cellular therapeutics and/or protein therapeutics, and methods of using such compositions for treating cancer are described.

Multi-specific binding proteins that bind to and kill human cancer cells expressing CD33 (Siglec-3) are described, as well as pharmaceutical compositions and therapeutic methods useful for the treatment of CD33 expressing cancer. The invention relates to multi-specific binding proteins that bind to human cancer cells expressing CD33, and exhibit high potency and maximum lysis of target cells compared to anti-CD33 monoclonal antibodies.

The present invention relates, in part, to pegylated chimeric proteins comprising one or more targeting moieties, linkers, and one or more signaling moieties, or variants thereof, and their use as therapeutic agents.

The present invention relates to a suppressor or inhibitor of the expression and/or the activity of Chitinase 3-like 1 (CHI3L1) for use in the prevention and/or treatment of tumors, wherein said tumors are resistant to antibody-dependent cell-mediated cytotoxicity (ADCC) dependent therapies and/or for use in reducing the risk of developing resistance to antibody-dependent cell-mediated cytotoxicity (ADCC) dependent therapies.