简介：Objective:Tostudythevaccinepotencyofgene-modifiedtumorcells.Methods:TheEL-4lymphomawastransducedwithrecombinantretroviruscontainingthemurineGM-CSFgeneorB7-1gene.Theeffectofgenetransductiononantitumorimmunitywasinvestigated.Results:Flowcytometryanalysisshowedthatexpressionoftheirsurfacemarkerbetweenwild-typeEL-4cellsandgenetransducedtumorcellswasthesameexceptforCD80positiveinB7-1genetransducedcells.GM-CSFgeneorB7-1genetransducedEL-4cellsresultedinremarkablelossoftumorigenicityinsyngeneticmice.ThesystemicprotectiveimmunitywasinducedagainstthechallengewithEL-4/wtcells.TherapeuticvaccinewithEL-4/GM-CSForEL/7-1cellscouldretardthegrowthofestablishedearly-stageEL-4/wttumorsignificantly,butnotretardthegrowthoflate-stageEL-4/wttumor.IrradiatedGM-CSFgenetransducedEL-4cellsshowedstrongvaccineeffectagainstEL-4cellchallenge,butirradiatedB7-1genetransducedEL-4cellsshowedweakvaccineeffect.RemarkablecooperativeantitumoreffectagainstEL-4cellchallengewasobservedwhenbothirradiatedEL-4/GM-CSFandEL-4/B7-1wereinoculatedtogether.Conclusion:GM-CSFgeneorB7-1genetransducedcombinationofthetwokindsofvaccinemayhavepotentialapplicationvalueinhumancancertreatment.

简介：目的探索bcl-2-9GM-CSF的长链dsRNA(LongerdoublestrandRNA，LdsRNA)对肿瘤细胞生长的抑制作用。方法使用体外转录法制备地高辛标记的bcl一2和GM—CSF基因的LdsRNA，转染THP1、HL-60和K562髓系白血病细胞系，分别以MTT法、免疫组化、免疫荧光技术和紫外分光光度计检测细胞LdsRNA转染水平，细胞增殖，特异性bcl-2蛋白表达和细胞总蛋白含量。结果LdsRNA能显著抑制THP1细胞增殖(P<0．05)和蛋白质合成，对HL-60和K562细胞系也有一定的抑制作用。结论LdsRNA能抑制肿瘤细胞的增殖，为以后利用LdsRNA用于肿瘤的治疗奠定一定的理论基础。