Blinatumomab Combined With Low-dose DLI as Maintenance Therapy After Transplantation for B-ALL

A Single-arm, Open-label, Phase I Clinical Study of Blinatumomab Combined With Low-dose DLI as Maintenance Therapy After Transplantation for B-ALL

This prospective study will be conducted in high-risk B-ALL patients post-allo-HSCT. We propose to investigate the safety and therapeutic efficacy of blinatumomab plus low-dose DLI maintenance therapy, with the ultimate goal of enhancing long-term survival outcomes.

Study Overview

• Status: Recruiting
• Conditions: ALL (Acute B-Lymphoblastic Leukemia)
• Intervention / Treatment: Drug: Blinatumomab Injection; Other: Donor Lymphocyte Infusion (DLI)

Detailed Description

This study is a single-center, prospective, single-arm Phase I clinical trial. Since July 2023, 12 patients with high-risk acute B-lymphoblastic leukemia who underwent allogeneic hematopoietic stem cell transplantation were enrolled at the Department of Hematology, the PLA General Hospital . Patients were enrolled after 45d for MSD-HSCT, and after 60d for URD/Haplo donor-HSCT. The maintenance regimen combined blinatumomab (9 µg/day × 7 days) and donor lymphocyte infusion (DLI, CD3+ cells 1× 10⁵/kg). The first cycle was given within the first 3 months after allogeneic HCT and then at approximately 6, 9, and 12 months following transplant. The safety and efficacy of this regimen were analyzed. Patients were premedicated with dexamethasone prior to the start of each cycle. The study was approved by the Ethics Committee of the PLA General Hospital.

• Study Type: Interventional
• Enrollment (Estimated): 60
• Phase: Phase 1

Contacts and Locations

• Study Contact: Name: Lu Wang; Phone Number: 86-10-66937079; Email: wangludophine@163.com
• Study Contact Backup: Name: Liping Dou, Dr.; Email: lipingruirui@163.com

Study Locations

• China
  • Beijing, China
    • Recruiting
    • Chinese PLA General Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• 1) Voluntary participation: The participant or legal guardian fully understands this clinical study, provides informed consent (ICF), and is willing/able to comply with all trial procedures.

  2) Age: <70 years old at screening, any gender. 3) Diagnosis: High-risk acute B-lymphoblastic leukemia (B-ALL) with MRD-negative status post-transplant. High-risk factors include:

  • >CR1 status
  • Pre-transplant MRD+ status
  • Ph-like subtype
  • KMT2A rearrangement

  • Other high-risk cytogenetic/genetic factors per ELN 2023 criteria. 4) Allergy: No history of severe allergies. 5) Liver function: ALT and AST ≤ 2.5 × ULN; Total bilirubin ≤ 2 × ULN. 6) Renal function: Serum creatinine ≤ ULN. 7) Other conditions: Absence of uncontrolled infections or severe psychiatric disorders.

    8) Performance status: ECOG score 0-3, with life expectancy ≥ 4 months. 9) MRD status: Bone marrow flow cytometry confirmed MRD-negative before enrollment.

    10) Engraftment: Evidence of myeloid and platelet engraftment. 11) GVHD: No active graft-versus-host disease (GVHD).

Exclusion Criteria:

• 1) Drug hypersensitivity/contraindications: Patients with known allergies or contraindications to the investigational drug(s).

  2) Pregnancy/lactation: Pregnant or breastfeeding female patients. 3) Active infection/GVHD: Patients with active infection or active graft-versus-host disease (GVHD).

  4) Substance abuse: Patients with chronic heavy smoking or alcohol use that may interfere with clinical evaluation.

  5) Impaired consent/compliance: Patients unable to provide informed consent or comply with procedures due to psychiatric/neurological disorders.

  6) Recent major surgery: Patients who underwent major organ surgery within the past 6 weeks.

  7) Organ dysfunction:

• Liver: ALT or AST > 2.5 × ULN; Total bilirubin > 2 × ULN
• Kidney: Serum creatinine > ULN 8) Investigator judgment: Patients deemed ineligible by investigators (e.g., poor compliance, substance abuse).

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: BLINA+DLI; blinatumomab 9ug d1-7, 28ug d8-14, DLI ( CD3+cell 1×10^5/kg)	Drug: Blinatumomab Injection; blinatumomab 9ug d1-7, 28ug d8-14; Other: Donor Lymphocyte Infusion (DLI); CD3+cell 1×10^5/kg

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
1 year progression-free-survival	the percentage of patients who remain alive and whose disease has not gotten relapse one full year after they started treatment.	1 year

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
1 year aGVHD rate	Number of participants with aGVHD as assessed by acute graft versus host disease grading criteria (refer to Glucksberg criteria) The cumulative incidences of aGvHD was defined as the number and the ratio of the participants with aGVHD.	100 days after transplantation
1 year cGVHD rate	Number of participants with cGVHD as assessed by chronic graft versus host disease grading criteria (refer to NIH criteria) cGvHD was diagnosed and graded according to the 2014 National Institutes of Health (NIH) consensus criteria: mild, moderate or severe respectively.	365 days after transplantation
Nonrelapse mortality (NRM)	Defined as the proportion of subjects who died due to causes other than malignancy relapse	365 days after transplantation
Overall survival (OS)	Defined as the time from study enrollment (first day of ruxolitinib treatment) to death due to any cause	365 days after transplantation

Collaborators and Investigators

• Sponsor: Liping Dou

Study record dates

Study Major Dates

• Study Start (Actual): December 1, 2024
• Primary Completion (Estimated): November 30, 2028
• Study Completion (Estimated): December 1, 2028

Study Registration Dates

• First Submitted: June 16, 2026
• First Submitted That Met QC Criteria: June 28, 2026
• First Posted (Actual): July 1, 2026

Study Record Updates

• Last Update Posted (Actual): July 1, 2026
• Last Update Submitted That Met QC Criteria: June 28, 2026
• Last Verified: June 1, 2026

More Information

Terms related to this study

• Keywords: Blinatumomab; donor lymphocyte infusion; high-risk B-cell ALL
• Additional Relevant MeSH Terms: blinatumomab
• Other Study ID Numbers: BLINADLISTUDY

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No