Abstract
Author(s): KokChong Yap,Liam Pock Ho,Pui San Yit,and Yeow Tee Goh
Relapsedandrefractorydiseaseshortensthesurvivalofacutemyeloidleukemia(AML)patients.Therefore,additional therapyapartfromconventionalchemotherapyandstemcelltransplantationisurgentlyneeded,especiallyineradicatingresidual leukemic stem cells. The identiï¬�cation of leukemia associated antigens, and the observation that administration of allogeneic T cellsmaymediategraftversusleukemiaeï¬??ectpavedthewaytodevelopvariousimmunotherapystrategies.Eï¬??ectiveprovisionof bothtumorantigenandco-stimulationareessentialforstrategiesaimedatenrollingcytotoxicT-lymphocytestoeradicateleukemic cells.Inthisstudy,weattemptedtoup-regulateco-stimulatorsonleukemiccells(termed“dendritisation”tomimicdendriticcells inprovidingstrongco-stimulation)andcouplewithinherentleukemicantigenstogeneratespeciï¬�cantileukemicT-lymphocytes againstautologousblastcells.OurstudyshowsevidenceofdistinctcytotoxicityofCD4positiveTlymphocytesagainstautologous blastcells.DendritisedAMLblastswereabletofunctionwithantigenpresentingcapability,whilestillphenotypicallyexistingas blastcells.ThiswasalsoachievableforawiderangeofsubtypesofAML,makingitapotentialimmunotherapyagainstAML
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