Abstract
目的探讨TPMT*2 rs1800462、TPMT*3B rs1800460、TPMT*3C rs1142345和NUDT15 rs116855232基因多态性对成人急性淋巴细胞白血病(ALL)患者6-巯基嘌呤(6-MP)耐受性的影响。方法选取2015年9月至2019年12月于中国医学科学院血液病医院确诊并接受环磷酰胺、阿糖胞苷和6-MP(CAM方案)治疗的216例成人ALL患者,利用Taqman SNP基因分型方法检测患者的TPMT、NUDT15基因型。结合临床资料,分析基因多态性对ALL治疗中含6-MP方案耐受性的影响。结果216例患者中B-ALL 185例(85.65%)、T-ALL 31例(14.35%)。TPMT*2 rs1800462 CC型216例(100.00%);TPMT*3B rs1800460 CC型216例(100.00%);TPMT*3C rs1142345 TT型209例(96.76%)、TC型7例(3.24%),等位基因突变频率为1.62%。NUDT15 rs116855232 CC型166例(76.85%)、CT型48例(22.22%)、TT型2例(0.93%),等位基因突变频率为12.04%。TPMT*3C rs1142345突变型组(TC+CC型)悬浮红细胞的输注量少于野生型组(CC型)(P=0.036);TPMT*3C rs1142345突变型组出现肝损害(天冬氨酸转氨酶升高)的风险高于野生型组(OR=9.559, 95%CI 1.135~80.475, P=0.038)。NUDT15 rs116855232突变型组(CT+TT型)WBC<1×109/L和中性粒细胞绝对计数<0.5×109/L的持续时间均长于野生型组(CC型)(P=0.005,P=0.007);突变型组单采血小板的输注量多于野生型组(P=0.014)。结论TMPT、NUDT15基因多态性可以影响成人ALL患者对6-MP的耐受性。治疗前检测患者基因型,进而优化6-MP使用剂量,有助于缩短骨髓抑制时间和减少血制品输注量。临床试验注册:中国临床试验注册中心(ChiCTR-TNC-09000397)
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