5、olunteers′PBMNC.TheeffectofCTLonK562cellswasdetectedbyMTTassay.TheresultsshowedthattreatmentofTcellswithexosomesderivedfromK562cells or DCstransfectedwithtotalRNAofK562cellscouldsignificantlypromotetheirkillingabilityonK562cellsascomparedwithuntreatedTc