Subcutaneous Blinatumomab for Treatment of Adult Patients With CD19-Positive Mixed Phenotype Acute Leukemia (MPAL)

NCT07222579 | Recruiting Phase 2 DMC FDA Drug

• 1 other identifier: 2506170190
• Study Type: interventional
• Target: 78
• Locations: 1 country
• Sites: 1

Brief Summary

This is a multicenter, non-randomized, open-label, phase II study evaluating blinatumomab administered subcutaneously in adult subjects with CD19+ MPAL. This trial consists of three cohorts of patients with CD19-positive MPAL, categorized as follows: 1. Cohort A: Newly diagnosed CD19+ MPAL in untreated patients who are either ≥ 75 years of age or have at least one coexisting condition precluding intensive chemotherapy. 2. Cohort B: Patients with CD19+ MPAL who have achieved complete remission (CR, CRh, or CRi) following at least one line of treatment but have detectable measurable residual disease (MRD) at a level of ≥ 0.1%, assessed using an assay with a minimum sensitivity of 0.01%. 3. Cohort C: Patients with CD19+ MPAL with morphologic relapsed or refractory (R/R) disease following at least one prior line of treatment. The Primary Objectives for each cohort are for Cohort A: to evaluate the efficacy of SC-blinatumomab in treatment; for Cohort B: to assess the ability of SC-blinatumomab to achieve MRD-negative CR; for Cohort C: to determine the efficacy of SC-blinatumomab in inducing CR, CRh, or CRi in patients. At specified time points, subjects will undergo the following procedures: collection of informed consent, medical history, demographics, ECOG performance, and physical exam including vital signs as well as neurological examination including examination of writing ability. Subjects will provide samples for complete blood count with differential and blood chemistry profile, have a bone marrow aspiration and biopsy and lumbar puncture will be performed per protocol or if clinically indicated, and/or ECG, Echocardiography, pulmonary function test will be performed only if medically indicated. The subcutaneous treatment will be given in both the inpatient and outpatient setting. For an individual subject the length of participation includes up to a 3-week screening period, up to a 13-month treatment period, and a safety follow-up visit (30 days after the last dose of study treatment), and a follow-up period.

Conditions

CD19 Positive; Mixed Phenotype Acute Leukemia (MPAL)

Outcome Measures

Primary Outcomes (3)

• Cohort A - Overall Survival

  The Overall Survival (OS) is the time from treatment initiation to death from any cause.

  Up to 3 years

• Cohort B - Rate of Complete Remission (CR), Complete Remission with Partial Hematological Recovery (CRh), or Complete Remission with Incomplete Hematological Recovery (CRi) with Minimal Residual Disease (MRD) negativity

  The rate of achievement of complete remission (CR/CRh/CRi) with MRD-negativity (\<0.01%) after the first two cycles of therapy with blinatumomab. CR: Bone marrow blasts \<5%; absence of circulating blasts; absence of extramedullary disease; absolute neutrophil count (ANC) ≥1000/µL and platelets ≥100,000/µL; MRD+ or unknown. CR +CRh: Bone marrow blasts \<5%; absence of circulating blasts; absence of extramedullary disease; ANC ≥500/µL AND platelet count ≥50,000/µL. CR +CRi: Bone marrow blasts \<5%; absence of circulating blasts; absence of extramedullary disease; with residual thrombocytopenia (platelet count of \<100,000/µL) OR residual neutropenia (ANC \<1000/µL); not fulfilling criteria for CRh. MRD Negativity: No detectable cancer cells using sensitive tests, with less than 0.01% cancer cells. MRD positivity indicates a higher risk of relapse, while MRD negativity is linked to long-term remission and survival benefits.

  At completion of 2 cycles (each cycle is 34 days)

• Cohort C - Rate of Complete Remission (CR) or Complete Remission with Partial Hematological Recovery (CRh)

  The rate of achievement of complete remission (CR/CRh) after the first two cycles of therapy with blinatumomab. Complete Remission (CR): No detectable cancer cells in the bone marrow (less than 5% blast cells) and normal blood counts. CRh: No detectable cancer cells, with partial recovery of blood counts (ANC 500-1,000/µL, platelets 50,000-100,000/µL). The rate of achieving these states is calculated by the proportion of patients who reach CR/CRh within a set time. Higher rates of achievement indicate that a larger proportion of participants are responding positively to the treatment, with no detectable cancer cells in their bone marrow and recovery of blood counts.

  At completion of 2 cycles (each cycle is 34 days)

Secondary Outcomes (11)

• Cohort A - MRD-negative CR + CRh rate

  At completion of 2 cycles (each cycle is 34 days)

• Cohort A - Event-Free Survival (EFS)

  Up to approximately 3 years

• Cohort A - Incidence and Severity of Adverse Events (AEs)

  Up to approximately 1 year

• Cohort B - Overall Survival

  Up to approximately 3 years

• Cohort B - Rate of MRD-negativity (<0.01%)

  At completion of 1 cycle (cycle is 34 days)

Other Outcomes (4)

• Overall - Characterization of Antigen Expression

  Up to 10 years

• Overall - Frequency of Cytogenetic Abnormalities Identified by Karyotyping and Fluorescence In Situ Hybridization (FISH)

  Up to approximately 10 years

• Overall - Frequency of Somatic Mutations Identified by Next-Generation Sequencing (NGS) and Polymerase Chain Reaction (PCR)

  Up to approximately 10 years

Study Arms (3)

Blinatumomab in Newly Diagnosed CD19+ MPAL, Age ≥ 75 or Unfit for Intensive Chemotherapy

EXPERIMENTAL

Cohort A: Evaluate the efficacy of SC-blinatumomab in treating newly diagnosed CD19+ MPAL in patients ≥ 75 years old or those deemed unfit for intensive chemotherapy. * Each cycle = 34 days (26-day treatment period + 8-day treatment free interval between day 27 and day 34). * Cycle 1 receives treatment daily during the first week and 3 times (TIW) weekly (M/W/F) during weeks 2-4. * In subsequent cycles, the treatment will be administered TIW during weeks 1-4. * All subjects will be hospitalized for days 1-12 of cycle 1. * Other treatment doses will be given as outpatients. Subjects will remain in the outpatient department for 1-6 hours after each dose is given. * Treatment will be given with ability to delay cycle initiation based on blood counts or general physical/neurological examination findings per clinical indication and institutional standard practice.

Drug: Subcutaneous Blinatumomab

Blinatumomab use in CD19+ MPAL in first or second CR/CRh/CRi with detectable MRD ≥0.1%

EXPERIMENTAL

Cohort B: Assess the ability of SC-blinatumomab to achieve MRD-negative CR in patients with CD19+ MPAL in CR/CRh/CRi with persistent MRD positivity (≥ 0.1%) after at least one line of treatment. * Each cycle = 34 days (26-day treatment period + 8-day treatment free interval between day 27 and day 34). * Cycle 1 receives treatment daily during the first week and 3 times (TIW) weekly (M/W/F) during weeks 2-4. * In subsequent cycles, the treatment will be administered TIW during weeks 1-4. * All subjects will be hospitalized for days 1-12 of cycle 1. * Other treatment doses will be given as outpatients. Subjects will remain in the outpatient department for 1-6 hours after each dose is given. * Treatment will be given with ability to delay cycle initiation based on blood counts or general physical/neurological examination findings per clinical indication and institutional standard practice.

Drug: Subcutaneous Blinatumomab

Blinatumomab use in Morphologic R/R CD19+ MPAL

EXPERIMENTAL

Cohort C: Determine the efficacy of SC-blinatumomab in inducing CR, CRh, or CRi in patients with morphologic relapsed or refractory CD19+ MPAL. * Each cycle = 34 days (26-day treatment period + 8-day treatment free interval between day 27 and day 34). * Cycle 1 receives treatment daily during the first week and 3 times (TIW) weekly (M/W/F) during weeks 2-4. * In subsequent cycles, the treatment will be administered TIW during weeks 1-4. * All subjects will be hospitalized for days 1-12 of cycle 1. * Other treatment doses will be given as outpatients. Subjects will remain in the outpatient department for 1-6 hours after each dose is given. * Treatment will be given with ability to delay cycle initiation based on blood counts or general physical/neurological examination findings per clinical indication and institutional standard practice.

Drug: Subcutaneous Blinatumomab

Interventions

Subcutaneous Blinatumomab DRUG

Blinatumomab will be administered as a subcutaneous (SC) injection.

Also known as: Blincyto®

Blinatumomab in Newly Diagnosed CD19+ MPAL, Age ≥ 75 or Unfit for Intensive Chemotherapy; Blinatumomab use in CD19+ MPAL in first or second CR/CRh/CRi with detectable MRD ≥0.1%; Blinatumomab use in Morphologic R/R CD19+ MPAL

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• General Criteria for all three Cohorts
• Subjects must have histologically or cytologically confirmed MPAL based on 2022 WHO criteria
• Subjects who have undergone allo-HSCT are eligible if they are ≥ 4 weeks post stem cell infusion, have no evidence of GVHD \> Grade 2, and are at least ≥ 1 week off of immunosuppressive therapy. Per FDA recommendation, patients should be off of calcineurin inhibitors (CNIs) for at least 4 weeks before receiving blinatumomab
• Subjects with a CNS leukemia must be clinically stable (i.e., asymptomatic with no focal neurological signs and symptoms, or signs and symptoms unchanged over 4 weeks with no \> grade 2 manifestations) with a flow cytometric clear CSF in the 2 weeks prior to day 1 of SC-blinatumomab administration.
• Ability to understand and willingness to sign a written informed consent document
• Agree to comply with the study requirements and agree to come to the clinic/hospital for required study visits
• Subjects with hematologic malignancies are expected to have hematologic abnormalities at study entry
• Specific Criteria for Cohort A
• o Subjects should be ineligible for available induction therapy either if they are 75 years of age or older or if they have at least one of the following coexisting conditions precluding intensive chemotherapy: a history of CHF for which treatment is warranted or a report of EF ≤50% in the last 12 months, a history of chronic stable angina, a report of DLCO of ≤65% or FEV1 ≤65% in the last 12 months, ECOG performance status 3 or 4, Charlson comorbidity index (CCI) ≥3.
• Specific Criteria for Cohort B
• CD19+ MPAL in CR/CRh/CRi after at least one line of treatment with MRD positivity at a level of ≥0.1% using an assay with a minimum sensitivity of 0.01%.
• ECOG performance status ≤2
• Subjects must have organ function as below:
• Direct bilirubin ≤ 2.5 mg/dL
• AST/ALT/Alkaline phosphatase ≤ 5 X institutional upper limit of normal

You may not qualify if:

• Criteria for all three Cohorts
• Subjects receiving any other investigational agents, or concurrent chemotherapy, radiation therapy, or immunotherapy for cancer treatment not including corticosteroids or hydroxyurea
• Active, uncontrolled infection; subjects with infection under active treatment and controlled with antimicrobials are eligible

Sponsors & Collaborators

• West Virginia University: lead
• Amgen: collaborator

Study Sites (1)

West Virginia University Cancer Institute

Morgantown, West Virginia, 26506, United States

RECRUITING

MeSH Terms

Conditions

Leukemia, Biphenotypic, Acute

Interventions

blinatumomab

Condition Hierarchy (Ancestors)

Leukemia, Lymphoid; Leukemia; Neoplasms by Histologic Type; Neoplasms; Hematologic Diseases; Hemic and Lymphatic Diseases; Lymphoproliferative Disorders; Lymphatic Diseases; Immunoproliferative Disorders; Immune System Diseases

Study Officials

• Ashkan Emadi, MD

  WVU Cancer Institute

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Ashkan Emadi, MD

CONTACT

304-293-5949; MPALStudyWVUCI@hsc.wvu.edu

Lindsay Carter

CONTACT

304-293-5949; MPALStudyWVUCI@hsc.wvu.edu

Study Design

• Study Type: interventional
• Phase: phase 2
• Allocation: NON RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Alexander Bland Osborn Endowed Chair and Distinguished Professor

Model Details: * Cohort A: Participants with newly diagnosed CD19+ MPAL who are ≥ 75 years old or deemed unfit for intensive chemotherapy * Cohort B: Participants with CD19+ MPAL in first or second CR/CRh/CRi with detectable MRD ≥0.1% * Cohort C: Participants with morphologic R/R CD19+ MPAL

Study Record Dates

• First Submitted: October 20, 2025
• First Posted: October 30, 2025
• Study Start: January 15, 2026
• Primary Completion (Estimated): August 1, 2029
• Study Completion (Estimated): August 1, 2031
• Last Updated: April 13, 2026

Record last verified: 2026-04

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)