The present invention provides an immune enhancer comprising at least an interferon and a granulocyte-macrophage colony-stimulating factor, and an immunotherapeutic pharmaceutical composition comprising at least an antigen and the above-mentioned immune enhancers. The present invention further discloses a preparation method of the immunotherapeutic pharmaceutical composition, the use of the immune enhancer and the immunotherapeutic pharmaceutical composition. The immune enhancer can be applied to disease and tumor treatments caused by viruses, bacteria, and other microorganisms.

An immune enhancer comprising at least an interferon and a granulocyte-macrophage colony-stimulating factor, and an immunotherapeutic phar-maceutical composition comprising at least an antigen and the above-mentioned immune enhancers is disclosed. A preparation method of the immunotherapeutic pharmaceutical composition, the use of the immune enhancer and the immunotherapeutic pharmaceutical composition are also disclosed. The immune enhancer can be applied to disease and tumor treatments caused by viruses, bacteria, and other microorganisms.

Provided herein are polypeptides, nucleic acids, and cells comprising antigen-binding domains that specifically bind to Solute Carrier Family 34 Member 2 (SLC34A2) or Transmembrane protease, serine 4 (TMPRSS4), and methods of use thereof. Also provided are polypeptides, systems, nucleic acids, and cells comprising priming receptors comprising an antigen-binding domain that specifically binds Solute Carrier Family 34 Member 2 (SLC34A2) and chimeric antigen receptors (CAR) comprising an antigen-binding domain that specifically binds to Transmembrane protease, serine 4 (TMPRSS4).