BCMA CAR-T cells with enhanced activities

Provided here are engineered immune cells that comprise a constitutively active chimeric cytokine receptor (CACCR) and a B-cell maturation antigen (BCMA) specific chimeric antigen receptor (CAR). Also provided herein are engineered immune cells that comprise one or more nucleic acids e.g. a bicistronic vector such as a viral vector that encode the CACCRs and BCMA CARs and engineered immune cells e.g. engineered autologous or allogeneic T cells that express both CACCRs and BCMA CARs from the nucleic acids. When present on chimeric antigen receptor (CAR)-bearing engineered immune cells, the CACCRs allow for increased immune cell activation, proliferation, persistence, and/or potency. Further provided herein are methods of making and using the engineered immune cells described herein, such as methods of treating a disease or condition by administering at least one appropriate dose of the cells to a patient suffering from the condition.