CD16high CD57high NK-92MI Cells
Cells and cell-based therapeutic compositions and methods are presented in which the cells are CD16+CD57+NK-92MI cells that natively express CD16 and CD57 and that exhibit IL-2 independent growth.
1 . A CD16+CD57+NK-92MI cell that natively expresses CD16 and CD57 and that exhibits IL-2 independent growth.
2 . The cell of claim 1 , wherein NKG2D is expressed on a cell surface of the cell in higher quantities as compared to NK-92MI cells, and/or wherein CD3 is not present on a surface of the cell and CD56 is present on the surface of the cell.
3 . The cell of claim 1 , wherein CD4+, CD25+, NKp30+, NKp44+, NKp46+, CD27+, OX40+, CD107a+, NKG2A+, PD-1+, TIGIT+, and/or CD158+is/are present on a surface of the cell.
4 . The cell of claim 1 , wherein the cell has enhanced direct cytotoxicity against Ramos cells as compared to NK-92MI cells, and/or wherein the cell has ADCC in the presence of a target cell and an antibody against a surface protein on the target cell.
5 . The cell of claim 1 , wherein the cell has, post-thaw and expansion, maintained high expression of CD57, CD16, and NKG2D as compared to NK-92MI cells.
6 . The cell of claim 1 , wherein the cell has a faster replenishment post degranulation, and/or a faster cell doubling time as compared to NK-92MI cells.
7 . The cell of claim 1 , wherein the cell is transfected with a recombinant nucleic acid that encodes a chimeric antigen receptor, a homing receptor, a chemokine receptor, a TGF-β trap, and/or a checkpoint inhibitor.
8 . A cell culture comprising a plurality of dividing cells in a culture medium, wherein the cells are CD16+CD57+NK-92MI cells that natively express CD16 and CD57 and that exhibit IL-2 independent growth, and wherein the medium is substantially free of IL-2.
9 . The cell culture of claim 8 , wherein the plurality of dividing cells are maintained in a single culture container from a start of the culture and during growth until a predetermined quantity of cells is obtained.
10 . The cell culture of claim 8 , wherein the culture contains at least 1×10 7 cells per culture container.
11 . The cell culture of claim 8 , wherein the medium contains AB serum.
12 . A method of preparing CD16+CD57+NK-92MI cells that natively express CD16 and CD57 and that exhibit IL-2 independent growth, comprising:
providing a plurality of NK-92MI cells, and
using anti-CD16 antibodies and anti-CD57 antibodies to enrich the CD16+CD57+NK-92MI cells that natively express CD16 and CD57.
13 . The method of claim 12 , wherein the each of the anti-CD16 antibodies and anti-CD57 antibodies are fluorescence-labeled and wherein the step of using the antibodies comprises fluorescence activated cell sorting.
14 . The method of claim 13 , wherein the fluorescence activated cell sorting is sequentially performed with respect to use of the anti-CD16 antibodies and anti-CD57 antibodies.
15 . The method of claim 13 , wherein the fluorescence activated cell sorting comprises iterative rounds of fluorescence activated cell sorting.
16 . A method of treating a cancer, comprising:
administering to an individual in need thereof a composition comprising a medium that contains a therapeutically effective quantity of cells according to claim 1 .
17 . The method of claim 16 , wherein the individual is a mammal, and/or wherein the cancer is a solid tumor.
18 . The method of claim 16 , wherein the medium is a growth medium, a cryopreservation medium, or a pharmaceutically acceptable medium for infusion, and wherein the NK-92MI derived cells are optionally irradiated.
19 . The method of claim 16 , wherein the cell is transfected with a recombinant nucleic acid that encodes a chimeric antigen receptor, a homing receptor, a chemokine receptor, a TGF-β trap, and/or a checkpoint inhibitor.
20 . The method of claim 16 , further comprising a step of co-administering an antibody, a checkpoint inhibitor, an immune stimulant, a cancer vaccine, and/or metronomic low-dose chemotherapy.