Effect of camellia sinensis Methanol extract on Human Lymphocytes in Vitro

This study was designed to investigate the effect of different concentrations of Camellia sinensis methanol extract on the growth of human lymphocytes in vitro. The lymphocytes were isolated from healthy person free of any infection and unhealthy persons suffering from leukemia. The results showed that the extract of C. sinensis has no inhibitory effect on the growth of lymphocytes of the healthy person, or at least maintain their growth. At the same time, this extract has a distinct inhibitory effect on the total count of lymphocytes of leukemic origin when compared with the control that represents untreated human lymphocytes. It was concluded that the extracts of C. sinensis may play a role in maintenance the normal lymphocyte growth and possess inhibitory effect on the growth of human leukemic lymphocytes.