中国南方汉族急性淋巴细胞白血病与 HLA基因相关性研究

为了研究中国南方汉族急性淋巴细胞白血病与人类白细胞抗原HLA-A、B、DRBI基因的遗传相关性,找 出ALL的易感基因,对以DNA作HLA基因分型的南方汉族人群的201例ALL患者进行甄选,并以4707例南方汉 族的志愿捐献造血干细胞的健康供者作为正常对照组,对两组间HLA等位基因多态性分布,通过HIA等位基因频 率(GF)分布的x2检验、显著性差异进行比较,计算疾病的危险率(RR)、病因分数(EF)和预防分数(PF),研究 ALL与HLA等位基因相关性。结果表明:南方汉族ALL患者的HLA-A26(GF=4.32％,x2=4.90,RR=1.774,EF =0.036),B56(GF=1.92％,x2=4.65,RR=2.116,EF=0.023),DR9(GF=1.29％,x2=3.99,RR=1.349,EF =0.092)3个基因频率显著高于正常对照组(P<0.05);HLA-A30(GF=1.25％,x2=3.92,RR=0.415,PF= 0.081),A33(GF=1.78％,x2=4.842,RR=0.612,PF=0.110)和B58(GF=1.83%,x2=7.21,RR=0.516,PF= 0.149)3个基因频率显著低于正常对照组(P<0.05)。结论:HLA-A26、B56、DR9 3个HLA基因与ALL有较强的 相关性,对南方汉族ALL患者可能有遗传易感作用;HLA-A30、A33、B58 3个基因可能是保护性基因。

Study on the Correlation between Acute Lymphoblastic Leukemia and HLA genes in Southern China Han population

To study the correlation between acute lymphoblastic leukemia (ALL) and HLA-A, B and DRB1 gene in southern Chinese Han population and to investigate the susceptible HLA gene to ALL, a total of 4707 healthy volunteer bone morrow donors from southern Chinese Han population were used as a control group, 201 patients diagnosed as patient group from southern Han individuals were genotyped at HLA-A, B and DRB1 loci by PCR-SSP, PCR-SSOP and SBT. HLA allele frequency and its distribution of ALL patient group were compared with the control group by using x2 test, and calculated the statistic value of relative risk (RR) , pathogenicity score (EF) and preventive score (PF). The results showed that in comparison with the control group, the gene frequence of HLA-A26, B56 and DR9 increased significantly , but the gene frequence of HLA-A30, A33 and B58 allele frequency decreased significantly for patients with ALL. It is concluded that HLA-A26, B56 and DR9 gene have a high correlation with ALL and seem to contribute the genetic susceptibility to ALL in southen Chinese Han populations. However, HLA-A30, A33 and B58 gene seem to have protective role for southern Han individuals suffered from ALL.