儿童传染性单核细胞增多症与急性淋巴细胞白血病GST基因遗传多态性研究

目的：探讨谷胱甘肽硫转移酶基因GSTT1及GSTM1多态性与儿童传染性单核细胞增多症（IM）、儿童急性淋巴细胞白血病（ALL）易感性的关系。方法：采用多重PCR技术对106例IM患儿、41例ALL患儿和100例非血液系统性疾病、非肿瘤疾病患儿外周血标本进行GSTT1和GSTM1基因多态性检测,分析不同基因型与儿童IM、ALL发病的关系。结果：IM组GSTT1纯合缺失基因型频率明显高于对照组,差异有统计学意义（P<0.05）;携带GSTT1纯合缺失基因型的个体发生IM的风险是携带GSTT1非纯合缺失基因型个体的2.186倍。GSTM1/GSTT1基因联合缺失型个体发生IM的风险是非联合缺失型个体的4.937倍。GSTM1纯合缺失基因型在ALL组的分布频率明显高于对照组,差异有统计学意义(P<0.05)。携带GSTM1纯合缺失基因型的患儿发生ALL的风险是携带GSTM1非纯合缺失基因型个体的2.242倍。GSTM1/GSTT1基因联合缺失型个体发生ALL的风险是非联合缺失型个体的8.552倍。结论：GSTT1或GSTM1纯合缺失基因型的儿童对IM或ALL易感性升高,当同时存在GSTT1和GSTM1纯合缺失时,IM或ALL易感性更高。GSTT1和GSTM1在IM及ALL致病过程中可能都发挥了作用。

Genetic polymorphism of GST gene in children with infectious mononucleosis and acute lymphocytic leukemia

Objective To study the relationship between glutathione S-transferase genes GSTT1 and GSTM1 polymorphisms and the susceptibility to infectious mononucleosis(IM) and acute lymphocytic leukemia(ALL) in children.Methods The case-control study involved 106 children with IM,41 children with ALL and a control group of 100 children with non-hematologic and nontumorous diseases.The genetic polymorphisms of GSTT1 and GSTM1 were detected with multiplex polymerase chain reaction(PCR).Distribution of the genotypes in the children was analyzed.Results The frequency of GSTT1 null genotype in children with IM was significantly higher than in the control group(P<0.05).The risk of IM in children carrying GSTT1 null genotype was 2.186 times higher than in those carrying GSTT1 non-null genotype.The children carrying both GSTT1 and GSTM1 null genotype had a higher risk of suffering from IM compared to those carrying only one of the null genotypes(OR=4.937).The frequency of GSTM1 null genotype in children with ALL was significantly higher than in the control group(P<0.05).The risk of ALL in children carrying GSTM1 null genotype was 2.242 times higher than in those in carrying GSTT1 non-null genotype.Children carrying both GSTT1 and GSTM1 null genotype had a higher risk of suffering from ALL compared with those carrying only one of the null genotypes(OR=8.552).Conclusions Children carrying GSTT1 or GSTM1 null genotype have a high risk of suffering from IM or ALL.Still more increased susceptibility to IM or ALL may occur in children who carry both GSTT1 and GSTM1 null genotype.GSTT1 and GSTM1 might play a potential role in the pathogenesis of both IM and ALL.