Abstract: Provided are B cell-activating factor receptor (BAFF-R)-binding molecules, in particular, to human antibodies specific for BAFF-R, including antibody fragments. The present disclosure further relates to recombinant receptors, including chimeric antigen receptors (CARs) that contain such antibodies or fragments, and polynucleotides that encode the antibodies, antigen-binding fragments or receptors specific for BAFF-R. Also provided are CARs which contain extracellular binding domains that bind to BAFF-R and B-lymphocyte antigen CD19 (CD19), genetically engineered cells expressing such CARs, and uses thereof in adoptive cell therapy.

Abstract: Provided herein are engineered immune cells, e.g. T cells, expressing a recombinant receptor, that contain a modified transforming growth factor-beta receptor type-2 (TGFBR2) locus encoding the recombinant receptor or a portion thereof. In some aspects, the cells are engineered by targeted integration of a transgene sequence encoding the recombinant receptor or a portion thereof, at a TGFBR2 genomic locus. Also provided are cell compositions containing the engineered immune cells, nucleic acids for engineering cells, and methods, kits and articles of manufacture for producing the engineered cells, such as by targeting a transgene sequence encoding a recombinant receptor or a portion thereof for integration into a region of a TGFBR2 genomic locus. In some embodiments, the engineered cells, e.g. T cells, can be used in connection with cell therapy, including in connection with cancer immunotherapy comprising adoptive transfer of the engineered cells.