Patent 11154575 was granted and assigned to Nkarta, Inc. on October, 2021 by the United States Patent and Trademark Office.
Several embodiments provided for relate to methods of using of anti-CD19 CAR expressing immune cells in immunotherapy. Provided for herein in several embodiments are immune cell-based (e.g., natural killer (NK) cell) compositions comprising CD19-directed chimeric antigen receptors. In some, embodiments the anti-CD19 binder portion of the CAR is humanized. In several embodiments, the humanized anti-CD19 CAR expressing cells exhibit enhanced expression of the CAR as well as enhanced cytotoxicity and/or persistence.