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时间:2020-03-08
《急性髓系白血病中DNMT3a基因突变的研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、中国实验血液学杂志JournalofExperimentalHematology2011;19(2):303-307·303·文章编号(ArticleID):1009-2137(2011)02-0303-05·论著·急性髓系白血病中DNMT3a基因突变的研究11乔纯,孙超,张苏江,钱思轩,钱锡峰,缪扣荣,朱华渊,洪鸣,李建勇南京医科大学第一附属医院,江苏省人民医院血液科,江苏南京210029;1南京医科大学附属无锡市人民医院血液科,江苏无锡214000摘要本研究探讨急性髓系白血病(AML)患者DNMT3a基因突变情况及临床特征。采用PCR扩增产物直接测序法检测77例AML患者
2、DNMT3a基因第882位氨基酸的突变情况,分析突变阳性患者的临床特征。结果表明,59例初诊AML患者中7例(11.9%)具有DNMT3a基因突变,突变类型分别为4例DNMT3aR882C、2例DNMT3aR882H和1例DNMT3aY874C。7例DNMT3a基因突变患者中2例为M2、1例为M4、4例为M5。27例正常核型中5例(22.7%)发生突变,而21例异常核型中无1例发生突变。CEBPA阳性患者发生DNMT3a突变率明显高于CEBPA阴性患者(p=0.002)。突变患者中有4例(4/7,57.1%)伴有淋系抗原CD4和/或CD7的表达。DNMT3a突变组患者的年龄、
3、性别、骨髓原始细胞数、白细胞数、血小板数、血红蛋白、完全缓解(CR)率、FLT3-ITD、NPM1和c-kit突变与DNMT3a野生型组相比均无统计学意义(p>0.05)。结论:DNMT3a基因突变多见于正常染色体核型AML伴NPM1和/或CEBPA突变阳性患者,其在AML患者预后中的预测价值有待于进一步的深入研究。关键词DNMT3a基因;基因突变;急性髓系白血病中图分类号R733.71文献标识码AAnalysisofDNMT3aGeneMutationsinAcuteMyelogenousLeukemia1QIAOChun,SUNChao,ZHANGSu-Jiang,QIA
4、NSi-Xuan,QIANXi-Feng,MIAOKou-Rong,ZHUHua-Yuan,HONGMing,LIJian-YongDepartmentofHematology,NanjingMedicalUniversityFirstHospital,JiangsuProvincialPeopleHospital,Nanjing210029,Jiangsu1Province,China;DepartmentofHematology,WuxiMunicipalPeopleHospital,NanjingMedicalUniversity,Wuxi214000,JiangsuP
5、rovince,ChinaCorrespondingAuthor:ZHANGSu-Jiang,AssociateProfessor.Tel:(025)83781120.E-mail:zbruce.zhang@gmail.comAbstractThisstudywaspurposedtoinvestigatethemutationalstatusofDNAmethyltransferase(DNMT3a)geneandtheclinicalfeaturesofAMLpatientswithDNMT3amutations.UsingPCRcombinedwithdirectlys
6、equencing,thesomaticmutationsofDNMT3ainvolvingresidueofaminoacid882weredetectedin77AMLpatients.Furthermore,theclinicalfeaturesofthesepatientswerealsostudied.TheresultsshowedthattheDNMT3amutationweredetectedin7outof59patientswithdenovoAML(11.9%),whichincluded4patientswithDNMT3aR882C,2patient
7、swithDNMT3aR882Hand1patientwithDNMT3aY874C.Morphologyexaminationindicatedthat2patientswereM2,1patientwasM4and4patientswereM5.Cytogeneticanalysisrevealedthatkaryotypein5outof7patientswithDNMT3amutationwerenormal.Intotalof27patientswithnormalkaryotype5pati
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