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Clinical Trial Summary

Allogeneic haematopoietic stem cell transplantation (allo-HSCT) remains one of the currently available curative therapies for acute leukemia (AL). Leukemia relapse is one of the mainly causes of transplant failure. We reported previously that patients with high-risk molecular biomarkers who still have detectable minimal residual disease(MRD) pre-HSCT were at very high risk of relapse, with cumulative relapse rate of 50-80%. Decitabine has been demonstrated efficacy in the treatment of patients with recurrent or refractory leukemia and myelodysplastiv syndrome. It was reported that the combination of decitabine, with busufan and cyclophosphamide as a preparative regimen for allo-HSCT using HLA-matching donors was safe and effective. In this prospective, single-arm clinical trial, we aimed to examine the efficacy of combining decitabine with modified busulfan and cyclophosphamide (mBU/CY) as a preparative regimen for allo-HSCT in patients with very high-risk AL and detectable MRD pre-HSCT.


Clinical Trial Description

Patients enrolled in this study would receive decitabine 200mg·m-2·d-1 on day -12 and -11 pre-HSCT. The conditioning therapy for human leukocyte antigen (HLA)-mismatched HSCT patients was modified BU/CY plus ATG (thymoglobulin; Sang Stat, France) consisting of cytarabine (Ara-C 4 g·m-2·d-1) intravenously on days -10 to -9, busulfan (BU 3.2 mg·kg-1·d-1) intravenously on days -8 to -6, cyclophosphamide (CY 1.8 g·m-2·d-1), intravenously on days -5 to -4, semustine (Me-CCNU, 250 mg·m-2), orally once on day -3, and ATG (2.5 mg·kg-1·d-1) intravenously on days -5 to -2. In matched sibling transplantations, patients received hydroxycarbamide (80 mg·kg-1) orally on day -10 and a lower dose of Ara-C (2 g·m-2·d-1) on day -9, but otherwise an identical regimen to the HLA-mismatched patients without ATG.

BM samples from patients were obtained to assess leukemia status after HSCT. The time points that we monitored BM samples included at time of allo-HSCT; 1 month, 2 months, 3 months, 4.5 months, 6 months, 9 months, and 12 months after allo-HSCT; and every 6 months thereafter to the defined endpoints or for at least until 5 years after transplantation. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03793517
Study type Interventional
Source Peking University People's Hospital
Contact Xiao-Jun Huang
Phone +86 010 88326666
Email yanchenhua@vip.sina.com
Status Recruiting
Phase Phase 2/Phase 3
Start date September 1, 2018
Completion date October 2026

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