目的探讨非HLA基因单核苷酸多态性(SNP)对造血干细胞移植后巨细胞病毒(CMV)感染的影响。方法对2008年7月至2011年12月接受异基因造血干细胞移植的受者及其相应供者64例进行研究。采用聚合酶链反应-序列特异性寡核苷酸探针和测序方法检测髓过氧化物酶基因(MP0)、甘露糖结合凝集素基因(MBL)、CDl4基因和血管紧张素转换酶(ACE)基因的SNP,结合CMVpp65检测结果,比较CMV阳性组和CMV阴性组ACE、CDl4、MPO、MBL基因SNP的差异。结果ACE16内含子基因多态性分布:DD型14例(10.9%),ID型72例(56.3%),II型42例(38.8%);CDl4-159位基因多态性分布:CC型18例(14.1%),CT型81例(63.3%),TT型29例(22.7%);MPO-463位点基因多态性分布:G型100例(78.1%),A型2例(1.6%),GA型26例(20.3%);MBL启动子一550位基因多态性分布:H型28例(21.9%),HL型73例(57.0%),L型27例(21.1%);MBL启动子-221位基因多态性分布:Y型87例(68.O%),YX型38例(29.7Z),X型3例(2.3%);MBL外显子1区基因多态性分布:A型94例(73.4%),AB型32例(25.0%),B型2例(1.6%)。CMV阳性组和CMV阴性组供、受者ACE、CDl4—159位点、MPO-463位点、MBL启动子-221以及外显子1区基因单核苷酸多态性相比较,差异均无统计学意义;但CMV阳性组供者MBL-550位点HL基因频率明显增高,与阴性组比较,差异有统计学意义。结论供者MBL的单核苷酸多态性对造血干细胞移植后CMV感染有影响。
Objective To explore the norrHLA gene polymorphisms that influence CMV infection after hematopoietic stem cell transplantation (HSCT). Method Non-HLA gene (ACE, CD14,MPO, MBL) single nucleotide polymorphisms were determined by using sequence-specific primer polymerase chain reaction (PCR-SSP) and sequencing in 64 pairs of donors and recipients before HSCT and the differences of non- HLA gene were analysed in CMV positive and negative patients. Results The distribution of ACE gene single nucleotide polymorphism was DD (14/128,10. 9%) ,ID (72/128,56. 3%) ,and II (42/128,38. 8%). The distribution of CD14 - 159 allele gene single nucleotide polymorphism was CC ( 18/128, 14. 1% ), CT (81/128,63.3%) ,and TT (29/128,22. 7%). The distribution of MPO- 463 allele gene single nucleotide polymorphism was G (100/128,78. 1%) ,A (2/128,1.6%) ,and GA (26/128,20. 3%). The distribution of MBL gene single nueleotide polyrnorphism was H (28/128,21.9%), HL (73/128,57. 0%), L (27/128, 21.1%) ,Y (87/128,68. 0%), YX (38/128,29. 7%), X (3/128, 2. 3%), A (94/128, 73. 4%), AB (32/ 128,25. 0%),and B (2/128, 1.6%). The allele frequency of ACE, CD14 and MPO shoed no significant differeenee between CMV positive and negative patients. The gene frequency of MBL-HL was increased in CMV positive group. Conclusion MBL gene single nueleotide polymorphisms may influence CMV infection after HSCT.