Haploidentical stem cell transplantation for patients with MRD positive CD19+ ALL

Prospective, Single-arm, Multicenter Clinical Study on Haploidentical Hematopoietic Stem Cell Transplantation in Patients With MRD Positive CD19+ALL Treated With Conditioning Regimens Containing Blinatumomab

This study is testing if a special type of stem cell transplant can help people with a specific type of leukemia who still have traces of the disease after treatment.

Quick facts

• Phase: Phase 1
• Study type: Interventional
• Enrollment: 31 (estimated)
• Ages: 18 Years to 70 Years
• Sex: All
• Sponsor: Zhejiang University (Academic / other)
• Drugs / interventions: Blinatumomab, chemotherapy
• Locations: 1 site (Hangzhou, Zhejiang)
• Trial ID: NCT06125106 on ClinicalTrials.gov

What this trial studies

This clinical study evaluates the effectiveness and safety of haploidentical hematopoietic stem cell transplantation in patients diagnosed with MRD positive CD19+ acute lymphoblastic leukemia (ALL) who have undergone conditioning with Blinatumomab. It is a prospective, single-arm, multicenter study involving 31 participants. Key clinical endpoints include progress-free survival, overall survival, incidence of relapse, non-relapse mortality, minimal residual disease, and graft versus host disease. The study aims to provide insights into the potential benefits of this treatment approach for a specific patient population.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 to 70 with CD19+ ALL who have achieved complete remission but remain MRD positive.

Not a fit: Patients with other types of leukemia or those who do not meet the specific inclusion criteria may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could improve survival rates and reduce relapse in patients with MRD positive CD19+ ALL.

How similar studies have performed: Other studies have shown promising results with similar approaches, particularly in the use of Blinatumomab in hematologic malignancies.

Eligibility criteria

Inclusion Criteria:

1. Diagnosed as acute B-ALL with CD19+ according to the 2022 WHO classification criteria. After induction and intensified chemotherapy, complete hematological remission was achieved, but MRD was positive by flow cytometry;
2. Age range from 18 to 70 years old, regardless of gender;
3. The Eastern Oncology Collaborative Group (ECOG) physical fitness score is 0-2 points;
4. Female patients of childbearing age who had a negative pregnancy test before the trial and agreed to take effective contraceptive measures during the trial until their last visit;
5. Organ function is normal, and the following laboratory indicators are met within one week of enrollment: creatinine clearance rate ≥ 60 mL/min (according to the Cockcroft Fault formula); AST and ALT ≤ 3 × Upper limit of normal value range (ULN), total bilirubin ≤ 2 × ULN; Echocardiography (ECHO) shows left ventricular ejection fraction (LVEF) ≥ 50%;
6. Life expectancy greater than 8 weeks;
7. Voluntarily sign an informed consent form to understand and comply with the requirements of the study.

Exclusion Criteria:

1. Failure to achieve complete hematological remission, including residual extramedullary infiltration;
2. Previously received hematopoietic stem cell transplantation;
3. Received systemic chemotherapy within 2 weeks;
4. Previously received treatment with Blinatumomab;
5. Have a history of central nervous system leukemia or present with central nervous system leukemia;
6. Active autoimmune diseases, such as SLE, rheumatoid arthritis, etc;
7. Currently suffering from clinically significant active cardiovascular diseases, such as uncontrolled arrhythmia, uncontrolled hypertension, congestive heart failure, any grade 3 or 4 heart disease determined according to the New York Heart Association (NYHA) functional classification (see Appendix 1), or having a history of myocardial infarction within 6 months prior to screening;
8. Chronic obstructive pulmonary disease with whole lung dysfunction;
9. Other serious diseases that may restrict patients from participating in this test (such as advanced infection, uncontrollable diabetes);
10. Concomitant arteriovenous thrombosis or hypercoagulable state;
11. Known human immunodeficiency virus (HIV) infection, or chronic infection of hepatitis B virus (HBsAg positive) or hepatitis C virus (anti-HCV positive) beyond drug control;
12. Pregnant or lactating women;
13. Severe allergies to other monoclonal antibodies in the past;
14. Those who are unable to understand, comply with the research protocol or sign an informed consent form.

Where this trial is running

Hangzhou, Zhejiang

• The first affiliated hospital of medical college of zhejiang university — Hangzhou, Zhejiang, China (Recruiting)

Study contacts

• Study coordinator: Jimin Shi

Conditions Acute Lymphoblastic Leukemia; Minimal Residual Disease; Allogeneic hematopoietic stem cell transplantation; Blinatumomab