The invention relates to an immune cell that is capable of antibody-dependent cellular cytotoxicity and which comprises a nucleic acid sequence encoding a secreted antigen binding protein. The invention also concerns a method of producing the immune cell and medical uses for the immune cell.

The disclosure features fusion proteins that are conditionally active variants of a cytokine of interest. In one aspect, the full-length polypeptides of the invention have reduced or minimal cytokine-receptor activating activity even though they contain a functional cytokine polypeptide. Upon activation, e.g., by cleavage of a linker that joins a blocking moiety, e.g. a steric blocking polypeptide, in sequence to the active cytokine, the cytokine can bind its receptor and effect signaling. Typically, the fusion proteins further comprise an in vivo half-life extension element, which may be cleaved from the cytokine in the tumor microenvironment.

The disclosure features fusion proteins that are conditionally active variants of a cytokine of interest. In one aspect, the full-length polypeptides of the invention have reduced or minimal cytokine-receptor activating activity even though they contain a functional cytokine polypeptide. Upon activation, e.g., by cleavage of a linker that joins a blocking moiety, e.g. a steric blocking polypeptide, in sequence to the active cytokine, the cytokine can bind its receptor and effect signaling. Typically, the fusion proteins further comprise an in vivo half-life extension element, which may be cleaved from the cytokine in the tumor microenvironment.

The present disclosure provides compositions and methods for enhancing immunity (or immune response). The compositions and methods are particularly useful for potentiating immune response of a lymphoid cell. The compositions and methods are also applicable for treating cancer and other diseases.

Provided herein is a combination product comprising a Bcl-2 inhibitor, an anti-CD20 antibody and/or bendamustine or a combination product comprising a Bcl-2 inhibitor and CHOP, the combination product provides a use of the combination product for prevention and/or treatment of a disease (e.g., cancer, rheumatoid arthritis (RA), granulomatosis with polyangiitis (GPA), and microscopic polyangiitis).

Provided herein is a combination product comprising a Bcl-2 inhibitor, an anti-CD20 antibody and/or bendamustine or a combination product comprising a Bcl-2 inhibitor and CHOP, the combination product provides a use of the combination product for prevention and/or treatment of a disease (e.g., cancer, rheumatoid arthritis (RA), granulomatosis with polyangiitis (GPA), and microscopic polyangiitis).

The present disclosure describes combination therapies comprising an antagonist of Programmed Death 1 receptor (PD-1) and a multi-RTK inhibitor, and the use of the combination therapies for the treatment of cancer. The multi-RTK inhibitor may be represented by Formula (I): ##STR00001## wherein R.sup.1 is C.sub.1-6 alkyl or C.sub.3-8 cycloalkyl, R.sup.2 is a hydrogen atom or C.sub.1-6 alkoxy, and R.sup.3 is a hydrogen atom or a halogen atom. A tumor therapeutic agent is disclosed that combines a compound or pharmaceutically acceptable salt thereof represented by Formula I and an anti-PD-1 antibody.

The present disclosure describes combination therapies comprising an antagonist of Programmed Death 1 receptor (PD-1) and a multi-RTK inhibitor, and the use of the combination therapies for the treatment of cancer. The multi-RTK inhibitor may be represented by Formula (I): ##STR00001## wherein R.sup.1 is C.sub.1-6 alkyl or C.sub.3-8 cycloalkyl, R.sup.2 is a hydrogen atom or C.sub.1-6 alkoxy, and R.sup.3 is a hydrogen atom or a halogen atom. A tumor therapeutic agent is disclosed that combines a compound or pharmaceutically acceptable salt thereof represented by Formula I and an anti-PD-1 antibody.

The present invention provides compositions and methods for treating cancer or a metastasis thereof in a subject. In some embodiments, the methods involve administering a composition comprising therapeutically effective amount of at least one immune stimulator to the subject. In some embodiments, a combination of at least two immune stimulators is used for the treatment. In some embodiments, the combination includes an alpha thymosin peptide and an additional immune stimulator, and/or optionally one or more additional anti-cancer agents.

The present invention provides compositions and methods for treating cancer or a metastasis thereof in a subject. In some embodiments, the methods involve administering a composition comprising therapeutically effective amount of at least one immune stimulator to the subject. In some embodiments, a combination of at least two immune stimulators is used for the treatment. In some embodiments, the combination includes an alpha thymosin peptide and an additional immune stimulator, and/or optionally one or more additional anti-cancer agents.