Haplo-identical HSCT Versus Chemotherapy for Adult Acute Lymphoblastic Leukemia Patients

Phase III Study to Compare Haplo-identical HSCT Versus Chemotherapy in First Remission for Standard-risk Adult Acute Lymphoblastic Leukemia

The survival of adult patients with standard-risk acute lymphoblastic leukemia(ALL) need to improve. We want to compare the efficacy of haplo-identical hematopoietic stem cell transplantation (HSCT) with chemotherapy for adult(age:18-39 years old) ALL patients in first phase of complete remission (CR1)

Although the high complete remission rate (80%-90%) can be achieved, the long-term survival rate of standard-risk adult patients with acute lymphoblastic leukemia(ALL) is only 25%-55% when they receive chemotherapy alone. The survival rate can be further improved uo to 50%-75% when they receive HLA-matched HSCT However, the chance of finding a HLA-matched donor is low, especially in China. Alternative donor such as halpo-identical related donor might be an choice.

Our retrospective analysis showed about 59% overall survival could be achieved when standard-risk adult ALL patients received halpo-identical HSCT.Therefore, we start this randomization controlled trial to compare the efficacy of haplo-identical HSCT with chemotherapy for adult(age:18-39 years old) ALL patients in CR1.

Inclusion Criteria:

• acute lymphoblastic leukemia
• 18-39 years old
• in first complete remission -Adequate hepatic function defined as: total bilirubin ≤2.0 times the institutional upper limit of normal (ULN); alanine aminotransferase (ALT) and aspartate aminotransferase(AST) ≤2.5 times the institutional ULN -
• Adequate renal function defined as creatinine ≤3 times the institutional ULN
• No uncontrollable infection
• Performance Status(PS)score 0-2(WHO)
• Subjects able to provide written informed consent

Exclusion Criteria:

• having HLA-matched donor
• high-risk ALL: (1)Ph+ALL (2)Hypodiploidy (3)t(v;11q23) (4) complex karyotype（≥5 chromosome abnormalities）（5）high white blood cell (WBC) count (B-ALL≥30×109/L;T-ALL ≥100×109/L).
• pregnancy
• Loss of ability to freely provide consent due to psychiatric or physical illness