Targeted Immunotherapy After Myeloablative TBI-Based Conditioning & AlloHCT in CAYA With High Risk T-Cell ALL & Lymphoma (ALLO-T-DART)

September 8, 2026 updated by: New York Medical College

Phase I Trial of Targeted Immunotherapy With Daratumumab Following Myeloablative TBI-Based Conditioning and AlloHCT in Children, Adolescents and Young Adults With High Risk T-Cell Acute Lymphoblastic Leukemia and Lymphoma (ALLO-T-DART)

A Phase I trial to determine the safety of targeted immunotherapy with daratumumab (DARA) IV after total body irradiation (TBI)-based myeloablative conditioning and allogeneic hematopoietic cell transplantation (HCT) for children, adolescents, and young adults (CAYA) with high risk T-cell acute lymphoblastic leukemia (T-ALL) or T-cell lymphoblastic lymphoma (T-LLy).

Pre- and post-HCT NGS-MRD studies will be correlated with outcomes in children, adolescents, and young adults with T-ALL undergoing allogeneic HCT and post-HCT DARA treatment. The study will also evaluate T-cell repertoire and immune reconstitution prior to and following DARA post-HCT treatment and correlate with patient outcomes.

Study Overview

Detailed Description

Total body irradiation (TBI)-based myeloablative allogeneic hematopoietic stem cell transplantation (HCT) using best available donor.

Daratumumab (DARA) treatment post-HCT:

Phase 1: 3 dose levels to determine safety (15 patients)

Dose expansion cohort (DEC): Further evaluation of PK and PD (correlative studies/exploratory endpoints) to guide future selection of RP2D (15 patients)

Treatment Schedule:

  1. Induction: DARA IV weekly x 8 doses (Weeks 1-8)
  2. Consolidation: DARA IV every 2 weeks x 8 doses (Weeks 9-24)
  3. Maintenance: DARA IV every 4 weeks (Stop at Day +270)

Study Type

Interventional

Enrollment (Estimated)

30

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

    • Arizona
      • Phoeniz, Arizona, United States, 85016
        • Not yet recruiting
        • Phoenix Children's Hospital
    • California
      • Loma Linda, California, United States, 92354
        • Recruiting
        • Loma Linda University Children's Hospital
        • Contact:
      • Los Angeles, California, United States, 90095
        • Not yet recruiting
        • University of California
        • Contact:
      • San Francisco, California, United States, 94143
        • Recruiting
        • University of California
        • Contact:
    • Colorado
      • Aurora, Colorado, United States, 80045
    • District of Columbia
      • Washington D.C., District of Columbia, United States, 20010
    • Florida
      • Gainsville, Florida, United States, 32608
      • St. Petersburg, Florida, United States, 33701
        • Not yet recruiting
        • John Hopkins All Children's Hospital
    • Indiana
      • Indianapolis, Indiana, United States, 46202
        • Recruiting
        • Riley Children's Hospital
        • Contact:
    • Massachusetts
      • Boston, Massachusetts, United States, 02115
    • Michigan
      • Grand Rapids, Michigan, United States, 49503
    • New York
      • Vallhala, New York, United States, 10595
    • Ohio
      • Columbus, Ohio, United States, 43205
        • Not yet recruiting
        • Nationwide Children's Hosptial
    • Pennsylvania
      • Philadelphia, Pennsylvania, United States, 19104
        • Recruiting
        • Children's Hospital of Philadelphia
        • Contact:
    • Texas
      • Houston, Texas, United States, 77030
        • Not yet recruiting
        • MD Anderson Cancer Center
    • Wisconsin
      • Milwaukee, Wisconsin, United States, 53226
        • Not yet recruiting
        • Medical College of Wisconsin

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

No older than 39 years (Child, Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • 0-39yrs
  • T-cell ALL in second or subsequent remission (≤ 5% blasts) or relapsed T-cell LLy with complete response after re-induction therapy (including secondary malignancy)
  • Planned allogeneic stem cell transplantation with donor identified
  • Performance status ≥ 60%
  • Fully recovered from the acute toxic effects of all prior chemotherapy, immunotherapy, or radiotherapy prior to entering this study
  • Meet organ function requirements
  • Signed IRB approved informed consent

Exclusion Criteria:

  • May not have had a prior autologous or allogenic stem cell transplant
  • May not have uncontrolled, systemic infection at the time of enrollment
  • Known allergies, hypersensitivity, or intolerance to mannitol, sorbitol, corticosteroids, monoclonal antibodies or human proteins, or their excipients
  • Must not be pregnant or actively breast feeding
  • Seropositive for HIV, hepatitis B or hepatitis C
  • COPD
  • Asthma
  • Clinically significant cardiac disease

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: Interventional

Phase 1: 3 dose levels to determine safety (15 patients)

Dose expansion:

Daratumumab (DARA) treatment post-HCT

  1. Induction: DARA IV weekly x 8 doses (Weeks 1-8)
  2. Consolidation: DARA IV every 2 weeks x 8 doses (Weeks 9-24)
  3. Maintenance: DARA IV every 4 weeks (Stop at Day +270)

Total body irradiation (TBI)-based myeloablative allogeneic hematopoietic stem cell transplantation (HCT) using best available donor.

Daratumumab (DARA) treatment post-HCT Phase 1: 3 dose levels to determine safety (15 patients)

Dose expansion:

  1. Induction: DARA IV weekly x 8 doses (Weeks 1-8)
  2. Consolidation: DARA every 2 weeks x 8 doses (Weeks 9-24)
  3. Maintenance: DARA every 4 weeks (Stop at Day +270)
Other Names:
  • Darzalex®

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Patients with dose limiting toxicity (per CTCAE v.5)
Time Frame: 60 days
occurrence of any Grade ≥ 3 non hematologic toxicity (per CTCAE v.5) which is probably, or definitely related to daratumumab
60 days

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Relapse free survival
Time Frame: 1 year
To measure relapse free survival in patients post HCT and daratumumab
1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Study Chair: Mitchell Cairo, MD, New York Medical College
  • Study Chair: Troy Quigg, DO, Helen DeVos Children's Hospital
  • Study Chair: Allyson Flower, MD, New York Medical College

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

May 22, 2023

Primary Completion (Estimated)

September 1, 2027

Study Completion (Estimated)

September 1, 2028

Study Registration Dates

First Submitted

July 13, 2021

First Submitted That Met QC Criteria

July 13, 2021

First Posted (Actual)

July 22, 2021

Study Record Updates

Last Update Posted (Actual)

September 11, 2026

Last Update Submitted That Met QC Criteria

September 8, 2026

Last Verified

September 1, 2026

More Information

Terms related to this study

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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