CD25抗体在单倍型干细胞移植后肠道急性GVHD治疗中的应用

目的 观察CD25抗体(巴利昔单抗)治疗单倍型造血干细胞移植(HSCT)后发生肠道Ⅲ～Ⅳ度急性移植物抗宿主病(aGVHD)的疗效.方法 2004年10月至2009年9月北京军区总医院20例单倍型HSCT后发生肠道Ⅲ～Ⅳ度aGVHD的患者,男13例,女7例,于确诊肠道aGVHD当日给予巴利昔单抗治疗,同时使用甲泼尼龙1 mg·kg-1·d-1静脉点滴,巴利昔单抗分别在第1、4天静脉点滴,每次的剂量是20 mg,如果肠道aGVHD无改善,第2周再重复使用,分析治疗疗效,观察输注相关的不良反应和巨细胞病毒(CMV)感染情况.结果 20例患者中完全缓解10例,部分缓解为5例,总有效率75.0%.使用巴利昔单抗后1～12 d,患者肠道aGVHD症状开始缓解,平均取得缓解时间为7 d.随访时间6～64个月,中位随访时间25个月.在完全缓解的10例中8例持续完全缓解无aGVHD复发;2例aGVHD复发患者,再次用巴利昔单抗取得缓解.9例生存,最长存活64个月,其中4例患者停用糖皮质激素,另外5例用低剂量糖皮质激素维持.Kaplan-Meier生存计算2年无病生存率为47.5%.结论 巴利昔单抗治疗单倍型HSCT后发生的肠道Ⅲ～Ⅳ度aGVHD疗效显著,未增加白血病复发和感染率.

Treatment of severe intestinal acute graft-versus-host disease with CD25 monoclonal antibody in haploidentical hematopoietic stem cell transplantation

Objective To study the feasibility of CD25 monoclonal antibody (basiliximab) in the treatment of severe Ⅲ-Ⅳ intestinal acute graft-versus-host disease (GVHD) following haploidentical hematopoietic stem cell transplantation (HSCT). Methods Twenty patients, 13 males and 7 females, who developed Ⅲ-Ⅳ intestinal acute GVHD after haplotypic HSCT between October 2004 and September 2009,diagnosis. The therapy was repeated in the second week if the intestinal symptoms showed no improvement. The therapeutic effect was analyzed and the adverse reaction and cytomegalovirus (CMV) infection were observed. Results Ten patients had a complete remission and 5 were in a partial remission. The total effective rate was 75.0%. The clinical symptoms started to lessen in 1-12 days after using basiliximab (average: 7 days). During the 6-64 month follow-up (average: 25 months), 8/10 cases with a complete remission had no acute GVHD relapse, and the other 2 relapsing patients experienced a remission after a readministration of basiliximab. Nine patients survived with a longest period of 64 months. Four withdrew corticosteroids and the other 5 stayed on a low-dose maintenance corticosteroid regimen. The 2-year diseasefree survival was 47.5% by Kaplan-Meier calculation. Conclusions Basiliximab is feasible in the treatment of Ⅲ-Ⅳ intestinal acute GVHD after haplotype HSCT. It does not increase the relapse of leukemia or the incidence of infections.