Outcome of second hematopoietic cell transplantation in Hurler syndrome

被引:33
作者
Grewal, SS [1 ]
Krivit, W [1 ]
Defor, TE [1 ]
Shapiro, EG [1 ]
Orchard, PJ [1 ]
Abel, SL [1 ]
Lockman, LA [1 ]
Ziegler, RS [1 ]
Dusenbery, KE [1 ]
Peters, C [1 ]
机构
[1] Univ Minnesota, Sch Med, Minneapolis, MN 55455 USA
关键词
Hurler syndrome; second hematopoietic cell transplantation; intellectual function; alpha-L-iduronidase;
D O I
10.1038/sj.bmt.1703395
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
Hurler syndrome (HS) is an autosomal recessive, inherited metabolic storage disorder due to deficiency of lysosomal alpha-L-iduronidase (IDU) enzyme activity. Untreated patients develop progressive mental retardation and multisystem morbidity with a median life expectancy of 5 years. Allogeneic hematopoietic cell transplantation (HCT) can achieve stabilization and even improvement of intellect, with long-term survival. However, children with HS have an increased incidence of graft failure, usually with concomitant autologous marrow reconstitution. Between 1983 and 2000, 71 Hurler children underwent HCT at the University of Minnesota. Of these 71, 19 (27%) experienced graft failure. We report HCT outcomes in all 11 Hurler patients receiving a second HCT at the University of Minnesota. Median age at second HCT was 25 months (range, 16 to 45 months); median time from first HCT was 8 months (range, 4 to 18.5 months). The conditioning regimen consisted of cyclophosphamide/TBI/ATG (n = 8) or busulfan/cyclophosphamide/ATG (n = 3). The source of bone marrow was an unrelated donor in six, matched sibling in four, and mismatched related in one. Five of the It grafts were T cell depleted prior to infusion. Overall, 10 of 11 patients showed donor-derived engraftment, of whom three developed grade 3 to 4 acute GVHD. Five of 11 patients are surviving a median of 25 months (range, 2 months to 12 years) with an overall actuarial survival of 50 % (95 % CI, 27 % to 93 %) at 4 years. All five show sustained donor engraftment with normalization of IDU activity levels. Three of five evaluable patients demonstrated stabilization of neuropsychological function after second HCT. Currently, allogeneic donor-derived hematopoiesis provides the only chance for long-term survival and improved quality of life in Hurler patients. While graft failure in Hurler patients requires further investigation, a timely second HCT can be well-tolerated and beneficial.
引用
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页码:491 / 496
页数:6
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