This page reports the study of the optimum condition for the measurementof PBMC proliferation by MTT assay,a colorimetric methd.In a dynamic measure of theproliferation of PBMC induced by PWM,SEB and ConA,there was a strong regression be-tween the O.D in MTT and the cpm in 3H一TdR uptake(r=0. 915~0. 982,p<0.05and p<0.01).The greatst value of P/N under the condition of the cell一density in 2×105/well,the cell culture for 4~6 days and MTT一culture for 4~6 hours was observed.In ad-dition,the KInds and concentrati...