Treatment for patients with relapsed or refractory B-cell acute lymphoblastic leukemia using UCART22

Open Label Dose-escalation and Dose-expansion Study to Evaluate the Safety, Expansion, Persistence and Clinical Activity of UCART22 (Allogeneic Engineered T-cells Expressing Anti-CD22 Chimeric Antigen Receptor) in Patients With Relapsed or refractoryCD22+ B-cell Acute Lymphoblastic Leukemia (B-ALL)

Phase1; Phase2 Interventional Cellectis S.A. · NCT04150497

This study is testing a new treatment called UCART22 to see if it can help people with relapsed or hard-to-treat B-cell acute lymphoblastic leukemia feel better.

Quick facts

PhasePhase1; Phase2
Study typeInterventional
Enrollment52 (estimated)
Ages15 Years to 50 Years
SexAll
SponsorCellectis S.A. Industry-sponsored
Drugs / interventionschemotherapy
Locations19 sites (Los Angeles, California and 18 other locations)
Trial IDNCT04150497 on ClinicalTrials.gov

What this trial studies

This clinical trial evaluates the safety and effectiveness of UCART22, a type of universal chimeric antigen receptor T-cell therapy, in patients with relapsed or refractory B-cell acute lymphoblastic leukemia (B-ALL). It is a first-in-human, open-label study that involves a dose escalation and expansion approach to determine the maximum tolerated dose and the recommended phase 2 dose. Participants will receive UCART22 intravenously, and the study aims to assess how well this treatment works compared to existing therapies.

Who should consider this trial

Good fit: Ideal candidates are patients with relapsed or refractory B-ALL whose cancer cells express CD22 and have undergone at least one standard chemotherapy and one salvage regimen.

Not a fit: Patients who have received prior cellular therapy or investigational cellular or gene therapy within the last 60 days may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide a new therapeutic option for patients with difficult-to-treat B-ALL.

How similar studies have performed: Other studies using similar CAR-T therapies have shown promising results, indicating potential for success in this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* B-ALL blast cells expressing CD22
* Diagnosed with R/R B-ALL
* Prior therapy must include at least one standard chemotherapy regimen and at least one salvage regimen

Exclusion Criteria:

-Prior cellular therapy or investigational cellular or gene therapy within 90 days prior to enrollment

Where this trial is running

Los Angeles, California and 18 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions B-cell Acute Lymphoblastic LeukemiaRelapse/Refractory B-ALLUniversal Chimeric Antigen Receptor T-Cell TherapyAllogeneicTranscription Activator-Like Effector Nuclease
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.