摘要
Objective:Toinvestigatetheinvitrocleavageabilityandeffectsonapoptosisandcellgrowthofthebcr-ablfusiongenespecificmulti-unitribozymes.Methods:Threefusionpointspecificribozymesweredesignedandthemulti-unitribozymes'invitrotranscriptionvectorandretroviralvectorwereconstructed.Theinvitrocleavageabilitywastested.TheretroviralvectorwastransfectedintoK562cellandtheeffectsonproliferation,apoptosis,cellcycleandcellstructurewereobserved.Results:Multi-unitribozymeshadinvitrocleavageefficiencyof70.8%,whichwasmoreefficientthansingle-unitanddouble-unitribozymes.TransfectionoftheretroviralvectoroftheribozymeintoK562cells,inducedinhibitionofcellgrowthandapoptosis.TheincorporationrateofDNAinribozymestransfectedK562cellswasgreatlydecreasedalongwithtimepassed,withaninhibitionrateofmorethan50%after96hoftransfection.UnderFCM,18.4%ofthecellsunderwentapoptosis72haftertransfectionandmorecellswereblockedinGphase,withtheratioinSphasegreatlydecreased(41.9%).Underelectronmicroscope,compactionofnuclearchromatinandapoptosisbodieswereobserved.Conclusion:Multi-unitribozymesspecifictobcr-ablfusiongenecanbeusedtotreatCMLandtopurgebonemarrowforself-grafting.
出版日期
2003年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
