HLA不全相合非亲缘供者脐血移植治疗二例儿童急性淋巴细胞白血病

目的　探讨HLA不全相合非亲缘供者脐血移植 (CBT)治疗血液系统恶性肿瘤造血及免疫重建情况及移植相关并发症。方法　对 2例儿童急性淋巴细胞白血病 (ALL)患儿进行HLA 1个位点不合非亲缘供者的CBT。预处理方案 :例 1采用白消安、环磷酰胺 (BU CTX)方案 ,例 2采用BU CTX+卡氮芥方案。移植物抗宿主病 (GVHD)的预防采用环孢菌素A(CsA) +霉酚酸酯 (MMF)方案。移植有核细胞数 (NC)例 1为 14.6× 10 7 kg ,例 2为 16 .2 4× 10 7 kg ,CD3 4+细胞例 1为 7.2 4× 10 5 kg ,例 2为2 1.11× 10 5 kg。结果　例 1和例 2中性粒细胞绝对计数 >0 .5× 10 9 L的时间分别为移植后第 5天和第7天 ;血小板计数 >5 0× 10 9 L的时间分别为移植后第 5 3天和第 46天 ;全血细胞恢复正常的时间分别为移植后第 6 0天和第 5 2天。例 1、例 2分别于移植后第 6 0天和第 30天免疫功能开始恢复 ,移植后第134天和第 12 2天免疫功能恢复正常。移植后第 19天和第 17天DNA指纹图提示供者型。例 1供者为男婴 ,移植后第 49天外周血及骨髓染色体检查均为供者型 :46 ,XY ,10 0 %嵌合。例 1和例 2分别于移植后第 2 6天和第 2 1天出现Ⅱ度急性GVHD。 2例受者已无病生存 2 1个月和 16个月余。结论　CBT造血重建与免疫重建快而稳定 ,移植相关并发症

Treatment of two case childhood acute lymphoblastic leukemia by HLA-mismatched unrelated umbilical cord blood transplantation

OBJECTIVE: To explore the hematopoietic and immunologic reconstitution and transplantation-related complications of HLA one locus mismatched unrelated umbilical cord blood transplantation for the treatment of hematological malignancies. METHODS: Two children with acute lymphoblastic leukemia received HLA-mismatched unrelated umbilical cord blood transplantation. The conditioning regimens were BU-CTX (case 1) and BU-CTX plus BCNU (case 2). GVHD prophylaxis regimen consisted of cyclosporine (CsA) and mycophenolate mofetil (MMF). The patients received 14.6 x 10(7) nucleated cells/kg with 7.24 x 10(5) CD(34)(+) cells/kg and 16.24 x 10(7) nucleated cells/kg with 21.11 x 10(5) CD(34)(+) cells/kg, respectively. RESULTS: The two recipients, ANC > 0.5 x 10(9)/L occurred at day 27 and day 17, BPC > 50 x 10(9)/L at day 53 and day 46, the peripheral blood counts normalization at day 60 and day 52, the immune function normalization at day 134 and day 122 and the DNA fingerprinting showing engraftment at day 19 and day 17, respectively. The donor-recipient pair of case 1 was male to female, and the chromosome karyotype of recipients bone marrow and peripheral blood cells showed 100%, 46, XY cells at day 49. Grade II acute graft versus host disease (aGVHD) occurred at day 26 (case 1) and day 21 (case 2). The two recipients have survived for 353 days and 256 days. CONCLUSION: The hematopoietic and immunologic reconstitution in umbilical cord blood transplantation were earlier and more durable. The transplantation-related complications were less and aGVHD were milder.