DIFFERENTIATION AND PROLIFERATION METHOD FOR NATURAL KILLER CELLS FROM CD14-POSITIVE MONOCYTES

摘要

The present invention relates to an effective differentiation and proliferation method for natural killer cells (NK cells) from cord blood, and more specifically, to a method for effectively differentiating and proliferating natural killer cells from cord blood, comprising the following steps: 1) removing CD3, CD34, CD56 and CD19 positive cells from cord blood-derived monocytes to prepare CD3-CD34-CD56-CD19 cells; 2) removing CD14-negative cells from the CD3-CD34-CD56-CD19 cells to prepare CD3-CD34-CD56-CD19-CD14-positive cells; and 3) mixing the CD3-CD34-CD56-CD19-CD14-positive cells with IL-15 and IL-21 and culturing the mixture. The present invention can obtain NK cells with a high purity within a short time by inducing NK cells from the CD14-positive cells, compared with a method inducing NK cells from hematopoietic stem cells. In addition, the present invention can induce NK cells with an excellent cell killing activity within a short time so as to differentiate the same into NK cells with a cancer cell killing properties, and thus can be useful for treatment of cancer cells.