Figure 3.

NK cell growth and their subsets were analyzed by flow cytometry. (a) NK cells from all age groups were dramatically divided and manufactured to almost more than 90% purity. Cell fold was significantly increased at all age groups in both genders after 14 days of culture. In comparison with aging, NK cell growth in elderly people was significantly lower than that in younger people. (b) Flow cytometry analysis of 14-day cultured CD56^bright and CD56^dim NK cell subsets at different age settings. P > 0.05. ^∗Between before and after cultured NK cells. ^#Between age groups.