抗CD47抗体联合阿糖胞苷靶向治
抗抗 CD47CD47 抗体联合阿糖胞苷靶向治抗体联合阿糖胞苷靶向治_ _省略省略 _SCID_SCID 小鼠单核细胞白血病的研究小鼠单核细胞白血病的研究_ _王颖王颖 超超 第 15 卷第 7 期 2013 年 7 月中国当代儿科杂志 ChinJContempPediatrVol.15No.7Jul.2013DOI:10.7499/j.issn.1008- 8830.2013.07.017 论著·实验研究 抗 CD47 抗体联合阿糖胞苷靶向治疗 NOD/SCID 小鼠单核细胞白血病的研究 王颖超冯磊殷楚云马丽娜魏永纬王春美盛光耀 (郑州大学第一附属医院儿科,河南省高等学校临床医学重点学科开放实验室, 河南郑州 450052) [摘 略。 方法要]目的探讨 CD47 在急性髓细胞白血病 NOD/SCID 小鼠模型中的预后意 义及靶向治疗的最佳策+-将分选的 CD34CD38 白血病干细胞 (leukemiastemcells,LSCs)移植入 NOD/SCID 小鼠体内,建立小鼠急性单核细 胞白血病模型;抗人 CD47 单克隆抗体单独或联合阿糖胞苷治疗白血病小鼠 7~ 14d,并进行疗效分析。将 LSCs 与小鼠巨噬细胞在含抗 CD47 单克隆抗体的培养 液中共培养,观察 CD47 对巨噬细胞吞噬 LSCs 能力的影响。结果+-THP-1 细胞 中存在 CD34+CD38-LSCs,比例约为 0.12%±0.06%,将分选后的 CD34CD38LSCs (比例高达 97.0%±1.7%)移植入 NOD/SCID 小鼠后成功建立白血病模型。体 内实验表明,阿糖胞苷(7d)联合抗 ++CD47 单克隆抗体(14d)治疗后,白血病小鼠外周血和骨髓中 CD33CD45 白血 病细胞下降最明显(P<0.01),生 抗 CD47 单克隆抗体组吞噬指数(76.9%±12.2%)明显高于抗存时间明显长于 其它各组。体外共培养 2h 后, CD45 单克隆抗体组(7.60%±2.4%,P<0.01)。结论 要临床意义。 [关键 CD47 高表达是急性髓细胞白血病的预后不良因素。阿糖[2013,15(7): 577-582]中国当代儿科杂志,词]急性髓细胞白血病;白血病干细胞;CD47; 阿糖胞苷;靶向治疗;小鼠胞苷联合抗 CD47 单克隆抗体可有效杀灭普通白血病 细胞和白血病干细胞,对彻底治愈急性髓细胞白血病具有重 EffectivenessofAnti-CD47antibodyandAra-CcombinationtargetingtherapyNO D/SCIDmouseofmyeloidleukemia WANGYing-Chao,FENGLei,YINChu-Yun,MALi-Na,WEIYong-Wei,WANGChun-Mei, SHENGGuang-Yao.Depart-mentofPediatrics, FirstAffiliatedHospitalofZhengzhouUniversity,Zhengzhou450052,China (Email:yingchaowang152@163.com) Abstract: ObjectiveTostudytheprognosticsignificanceofCD47inaNOD/SCIDmousemodelo facutemyeloidleukemia(AML) andthebeststrategyfortargetedtherapyforthisdisease.sCD34+CD38 -leukemiastemcells(LSCs) wereseparatedandtransplantedintoNOD/SCIDmicetoestablishamousemodelofa cutemonocyticleukemia(AMoL).Anti-humanCD47antibody, aloneorcombinedwithcytosinearabinoside(Ara-C), wasusedtotreatthemicewithAMoLfor7-14days, andtherapeuticefficacywasassessed.LSCswereculturedtogetherwithmousem acrophagesinculturemediumcontaininganti-CD47oranti-CD45monoclonalanti bodyfor2hours,toobservethephagocyticabilityof +macrophagestoLSCs.ResultsCD34CD38-LSCsexistedamongTHP-1cells, withacontentofabout(0.12± 0.06)%, andamousemodelofAMLwassuccessfullyestablishedafterthepurifiedCD34+CD3 8-LSCs(97.0%± 1.7%) weretransplantedintoNOD/SCIDmice.Theinvivoexperimentshowedthatmicewi thAMoLhadthemostsignificantdecreaseinCD33+CD45+leukemiacellsinperiphe ralbloodandbonemarrowandsurvivedthelongestafterbeingtreatedwithAra-C (7days)plusanti-CD47monoclonalantibody(14days)(P< 0.01).After2hoursofinvitroculture, thephagocyticindexintheculturemediumcontaininganti-CD47monoclonalanti bodywassignificantlyhigherthanintheculturemediumcontaininganti-CD45mo noclonalantibody(76.9%±12.2%vs7.60%±2.4%;P< 0.05).ConclusionsHighexpressionofCD47isanadverseprognosticfactorin AML.Combinationtherapywithanti-CD47monoclonalantibodyandAra-Ccaneffe ctivelyeliminateleukemiacellsandLSCs, demonstratinggreatclinicalsignificanceincuringAML.[ChinJContempPedi atr,2013,15(7):577-582] Keywords:Acutemyeloidleukemia;Leukemiastemcell;CD47; Cytosinearabinoside;Targetedtherapy;Mice 急性髓细胞白血病 (acutemyelocyticleukemia, AML)占儿童急性白血病的 15%~20%,除