mechanisms against a variety of infections and
cancers (Kuby, 1997). There is no definite rule in
reporting NK cell activities. The activities, reported
as LU/107PBMC, apparently demonstrated the
effects of each extract as compared with the ones
reported in % lysis. Calculation as % lysis may
not be comparable with other studies because of
differences in E:T ratios used in each study. We,
therefore, used activities in LU/107 PBMC in order
to assess the effects of each extract on NK cell