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| Name | Class |
|---|---|
| Peking University People's Hospital | OTHER |
| Guangxi Medical University | OTHER |
| Guangdong Provincial People's Hospital | OTHER |
| Guangzhou General Hospital of Guangzhou Military Command |
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The purpose of this study is to evaluate the efficacy of tyrosine kinase inhibitor(TKI) therapy based on molecular monitoring of BCR/ABL levels in Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL)undergoing allogeneic hematopoietic stem cell transplantation(allo-HSCT).
Philadelphia chromosome (Ph) is a reciprocal chromosomal translocation t(9;22）(q34;q11), which leads to the formation of the BCR/ABL oncogene. Ph is the most frequent cytogenetic abnormality in ALL characterized by poor outcome. With the BCR/ABL protein TKI, imatinib, in the combination chemotherapy regimes for newly diagnosed Ph+ ALL, more than 95% of patients can achieve complete remission(CR). Several studies have shown decreased relapse rates and improved disease-free survival for patients with imatinib-based treatment prior to allo-HSCT. However, the efficacy of maintenance therapy with imatinib after transplant for Ph+ ALL patients is still uncertain. In addition, acquired resistance to imatinib is frequently caused by point mutations in BCR/ABL that inactivate imatinib.
Detection of minimal residual disease (MRD) after transplant is associated with an increased risk of relapse. Reverse transcription-polymerase chain reaction (RT-PCR) is a sensitive method for detecting low-level BCR/ABL transcripts to assess MRD in Ph+ ALL. It has been corroborated by several reports that detection of MRD after SCT was predictive of imminent relapse.
In this study, we will evaluate the safety and efficacy of TKI therapy, when initiating treatment based on BCR-ABL transcript levels after allo-HSCT.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| TKI therapy | Experimental | Treatment with TKI will be initiated if the level of BCR-ABL transcript in the bone marrow is detectable and transcript levels increased for two consecutive tests. TKIs will be given for patients without BCR/ABL mutations and sensitive TKIs will be given for those with mutations. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| TKIs | Drug | Imatinib was given at a dose of 400mg/d or 600mg/d, dasatinib at a dose of 100mg/d or 140mg/d, and nilotinib at a dose of 400mg twice daily. If the patients had T315I mutations, ponatinib will be given. If the BCR/ABL levels increased or did not decrease after one month's use of TKI, donor lymphocyte infusion will be given and the TKI drugs will be modulated. If the patients experienced hematologic relapse, they will withdraw from the study. |
| Measure | Description | Time Frame |
|---|---|---|
| Overall survival(OS) | OS is defined as continuous survival until death from any cause after HSCT. | 2 years |
| Measure | Description | Time Frame |
|---|---|---|
| Relapse rate | A post-transplant relapse is defined as hematological relapse, extramedullary involvement of leukemia and cytogenetic relapse. | 2 years |
| Disease-free survival(DFS) | DFS is defined as continuous survival without relapse or death from any cause after HSCT. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Ren Lin, MD | Contact | +86-020-61641613 | lansinglinren@hotmail.com |
| Name | Affiliation | Role |
|---|---|---|
| Qifa Liu, MD | Nanfang Hospital, Southern Medical University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of Hematology,Nanfang Hospital, Southern Medical University | Recruiting | Guangzhou | Guangdong | 510515 | China |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 18986386 | Background | Yanada M, Sugiura I, Takeuchi J, Akiyama H, Maruta A, Ueda Y, Usui N, Yagasaki F, Yujiri T, Takeuchi M, Nishii K, Kimura Y, Miyawaki S, Narimatsu H, Miyazaki Y, Ohtake S, Jinnai I, Matsuo K, Naoe T, Ohno R; Japan Adult Leukemia Study Group. Prospective monitoring of BCR-ABL1 transcript levels in patients with Philadelphia chromosome-positive acute lymphoblastic leukaemia undergoing imatinib-combined chemotherapy. Br J Haematol. 2008 Nov;143(4):503-10. doi: 10.1111/j.1365-2141.2008.07377.x. | |
| 15817679 |
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| OTHER |
| Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University | OTHER |
| Third Affiliated Hospital, Sun Yat-Sen University | OTHER |
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|
| 2 years |
| Safety of TKI therapy | The toxicity of TKI is assessed according to the Common Toxicity Criteria, version 3.0. | 2 years |
| Background |
| Wassmann B, Pfeifer H, Stadler M, Bornhauser M, Bug G, Scheuring UJ, Bruck P, Stelljes M, Schwerdtfeger R, Basara N, Perz J, Bunjes D, Ledderose G, Mahlberg R, Binckebanck A, Gschaidmeier H, Hoelzer D, Ottmann OG. Early molecular response to posttransplantation imatinib determines outcome in MRD+ Philadelphia-positive acute lymphoblastic leukemia (Ph+ ALL). Blood. 2005 Jul 15;106(2):458-63. doi: 10.1182/blood-2004-05-1746. Epub 2005 Apr 7. |
| 33204013 | Derived | Liu H, Xuan L, Lin R, Deng L, Fan Z, Nie D, Li X, Liang X, Xu D, Zhang Y, Xu N, Ye J, Jin H, Lin D, Ma L, Sun J, Huang F, Liu Q. A new pre-emptive TKIs strategy for preventing relapse based on BCR/ABL monitoring for Ph+ALL undergoing allo-HCT: a prospective clinical cohort study. Leukemia. 2021 Jul;35(7):2054-2063. doi: 10.1038/s41375-020-01090-4. Epub 2020 Nov 17. |
| ID | Term |
|---|---|
| D018365 | Neoplasm, Residual |
| D010677 | Philadelphia Chromosome |
| D054198 | Precursor Cell Lymphoblastic Leukemia-Lymphoma |
| ID | Term |
|---|---|
| D009385 | Neoplastic Processes |
| D009369 | Neoplasms |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D014178 | Translocation, Genetic |
| D002869 | Chromosome Aberrations |
| D007945 | Leukemia, Lymphoid |
| D007938 | Leukemia |
| D009370 | Neoplasms by Histologic Type |
| D006402 | Hematologic Diseases |
| D006425 | Hemic and Lymphatic Diseases |
| D008232 | Lymphoproliferative Disorders |
| D008206 | Lymphatic Diseases |
| D007160 | Immunoproliferative Disorders |
| D007154 | Immune System Diseases |
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