Method for activating natural killer cells by tumor cell preparation in vitro
The present invention provides a method for activating a Natural Killer (NK) cell by contacting the NK cell in vitro with an activating tumor cell preparation (ATCP). The invention also provides an activated NK cell produced by such a method and its use in the treatment of cancer.
1. A method for activating a human Natural Killer (NK) cell, which comprises the step of contacting the human NK cell in vitro with an activating tumor cell preparation (ATCP) comprising intact tumor cells or a membrane preparation thereof; wherein said contact activates said human NK cell to lyse a target cell previously resistant to NK-cell lysis.
2. A method according to claim 1 , wherein the ATCP comprises CTV-1 myeloid leukemia cells or a membrane preparation thereof.
3. A method according to claim 1 , wherein, during activation, expression of CD69 is upregulated on the NK cell.
4. A method according to claim 1 , wherein the NK cell is autologous.
5. A method according to claim 1 , wherein the NK cell is allogeneic.