Enhanced immune cells using dual shRNA and composition including the same
The present disclosure is broadly concerned with the field of cancer immunotherapy. For example, the present invention generally relates to an immune cell comprising a genetically engineered antigen receptor that specifically binds to a target antigen and a genetic disruption agent that reduces or is capable of reducing the expression in the immune cell of a gene that weakens the function of the immune cell.
1. A method of treating cancer, comprising administering a T cell to a human subject having cancer, said T cell comprising a dual two-in-one vector that comprises
(i) a first nucleotide sequence that encodes and expresses in the T cell:
(a) a short hairpin RNA (shRNA) that inhibits expression of programmed cell death protein 1 (PD-1 shRNA), wherein the nucleotide sequence encoding the PD-1 shRNA consisting of SEQ ID NO:265 is regulated by a U6 Pol III promoter,
and
(b) an shRNA that inhibits expression of T cell immunoreceptor with Ig and ITIM domains (TIGIT shRNA), wherein the nucleotide sequence encoding the TIGIT shRNA consisting of SEQ ID NO: 240 is regulated by a U6 Pol III promoter,
wherein the two U6 Pol III promoters are oriented in different orientations from each other; and
(ii) a second nucleotide sequence that encodes and expresses in the T cell a chimeric antigen receptor (CAR), wherein the CAR comprises an extracellular antigen recognition domain that binds a target antigen associated with the cancer, a transmembrane domain, and an intracellular signal transduction domain;
wherein the first nucleotide sequence and the second nucleotide sequence are present on a single vector.
2. The method of claim 1 , wherein the target antigen is a cancer antigen whose expression is increased in or on the surface of a cancer cell, a cancer tissue, and/or a tumor microenvironment.
3. The method of claim 1 , wherein the target antigen is CD19 or CD22.
4. The method of claim 1 , wherein the intracellular signal transduction domain of the CAR further comprises a costimulatory molecule selected from the group consisting of ICOS, 0X40, CD137 (4-1BB), CD27, and CD28.
5. The method of claim 1 , wherein the two U 6 Pol III promoters are oriented in a head to head orientation.
6. The method of claim 1 , wherein the two U 6 Pol III promoters are oriented in a tail to tail orientation.