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Cellules T CD19/CD22 Bicistronique Chimeric Antigen Receptor (CAR) chez les enfants et les jeunes adultes atteints de tumeurs malignes à cellules B récurrentes ou réfractaires exprimant CD19/CD22

23 octobre 2026 mis à jour par: National Cancer Institute (NCI)

Étude de phase 1/2 sur l'augmentation de la dose des lymphocytes T récepteurs d'antigène chimériques (CAR) CD19/CD22 chez les enfants et les jeunes adultes atteints de tumeurs malignes à cellules B exprimant CD19/CD22 récurrentes ou réfractaires

Background:

Acute lymphoblastic leukemia (ALL) is the most common cancer in children. About 90% of children and young adults who are treated for ALL can now be cured. But if the disease comes back, the survival rate drops to less than 50%. Better treatments are needed for ALL relapses.

Objective:

To test chimeric antigen receptor (CAR) therapy. CARs are genetically modified cells created from each patient s own blood cells. his trial will use a new type of CAR T-cell that is targeting both CD19 and CD22 at the same time. CD19 and CD22 are proteins found on the surface of most types of ALL.

Eligibility:

People aged 3 to 39 with ALL or related B-cell lymphoma that has not been cured by standard therapy.

Design:

Participants will be screened. This will include:

Physical exam

Blood and urine tests

Tests of their lung and heart function

Imaging scans

Bone marrow biopsy. A large needle will be inserted into the body to draw some tissues from the interior of a bone.

Lumbar puncture. A needle will be inserted into the lower back to draw fluid from the area around the spinal cord.

Participants will undergo apheresis. Their blood will circulate through a machine that separates blood into different parts. The portion containing T cells will be collected; the remaining cells and fluids will be returned to the body. The T cells will be changed in a laboratory to make them better at fighting cancer cells.

Participants will receive chemotherapy starting 4 or 5 days before the CAR treatment.

Participants will be admitted to the hospital. Their own modified T cells will be returned to their body.

Participants will visit the clinic 2 times a week for 28 days after treatment. Follow-up will continue for 15 years....

Aperçu de l'étude

Description détaillée

Background:

  • Despite improvements in therapy, acute lymphoblastic leukemia (ALL) contributes to significant morbidity and mortality for children and young adults with cancer. CD19-CAR and CD22-CAR therapy have proven highly effective in inducing remission in patients with relapsed/refractory disease.
  • Immune escape has been observed by several groups following CD19-CAR and CD22- CAR therapy for B-ALL. Investigation of this phenomenon reveals a complex biology responsible for loss or downregulation of CD19 and/or CD22 expression observed in these cases.
  • The challenges encountered with currently available CD19- and CD22-directed CAR T cells in B-ALL demonstrates the need for combinatorial treatment strategies simultaneously targeting two antigens, such as CD19 and CD22, to enhance the long-term effectiveness of CARs.
  • We have previously treated patients with B-ALL on a phase 1/2 clinical trial using a bivalent CD19/22 CAR T-cell as a first combinatorial treatment strategy. This CAR T-cell construct is well-tolerated and has yielded responses however there has been limited CAR T cell expansion and persistence. Additionally, the previously tested CD19/CD22 bivalent CAR T-cell construct is limited in its ability to target CD22.
  • This new CD19/22 targeted construct being tested in this clinical trial has improved dual targeting capability based on preclinical data/evaluation.

Objectives:

  • Phase I: Assess the safety of administering escalating doses of autologous CD19/CD22- CAR engineered T cells in children and young adults with B cell ALL or lymphoma following a cyclophosphamide/fludarabine conditioning regimen.
  • Phase II: Determine the efficacy of CD19/CD22 therapy in participants with B-ALL/ B-LBL..

Eligibility:

-Participants between >= 3 years and <= 39 years of age, with CD19+ and/or CD22+ B cell ALL or lymphoma who have relapsed or have refractory disease after at least one standard chemotherapy regimen and one salvage regimen, with no alternative curative options.

Design:

  • Phase I, 3 + 3 dose escalation design across 4 cohorts (B-ALL/B-cell lymphoblastic lymphoma: A: low-disease burden (<25 % marrow blasts without extramedullary disease) vs. B: high-disease burden (>= 25 % marrow blasts or with EMD). C: B-cell non-Hodgkin lymphoma D: CD19+ or CD22+ single antigen positivity using the following dose levels: -2: 1 x 10^5 transduced T cells/kg (+/- 20%); -1: 3 x 10^5 transduced T cells/kg (+/- 20%); 1: 1 x 10^6 transduced T cells/kg (+/- 20%); and 2: 3x 10^6 transduced T cells/kg (+/- 20%). Cohorts will enroll concurrently.

  • Participants will be treated based on disease burden and will receive 1 of 2 lymphodepleting preparative regimens:

    • Lymphodepleting preparative regimen # 1: Fludarabine (30 mg/m^2/d x 3 on Days -4, -3, -2) and cyclophosphamide (900 mg/m^2/d x 1 on Day -2) followed by infusion of CD19/CD22-CAR T-cells on D0.
    • Lymphodepleting preparative regimen #2: Fludarabine (30 mg/m2/d x 4 on Days -5, -4, -3, -2) and cyclophosphamide (600 mg/m2/d x 2 on Days -3, -2) followed by infusion of CD19/CD22-CAR T-cells on D0.
    • Determination for use of LD regimen #1 versus #2 will be based on pre-treatment absolute lymphocyte count, pre-existing cytopenias, receipt of prior CAR T-cell therapy, high disease burden and assessment of infection risk.
  • Participants will be evaluated sequentially for toxicity, antitumor effects, CAR expansion and persistence, and other biologic correlatives.

Type d'étude

Interventionnel

Inscription (Estimé)

130

Phase

  • Phase 2
  • La phase 1

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Coordonnées de l'étude

  • Nom: NCI Ped LeukemiaLymph Cell Tx Tm
  • Numéro de téléphone: (240) 760-6970
  • E-mail: ncilltct@mail.nih.gov

Sauvegarde des contacts de l'étude

Lieux d'étude

    • Maryland
      • Bethesda, Maryland, États-Unis, 20892
        • Recrutement
        • National Institutes of Health Clinical Center
        • Contact:
          • For more information at the NIH Clinical Center contact National Cancer Institute Referral Office
          • Numéro de téléphone: 888-624-1937

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

3 ans à 39 ans (Enfant, Adulte)

Accepte les volontaires sains

Non

Sexes éligibles pour l'étude

Tout

La description

  • INCLUSION CRITERIA:

  • Diagnosis

    • Participant must:

      • Have pathology confirmed B cell ALL (not isolated to the testis or CNS), CML with ALL transformation, or high-grade lymphoma (e.g., Burkitt's lymphoma, B-lymphoblastic lymphoma, diffuse large B-cell lymphoma, inclusive of low-grade lymphoma that has transformed to high grade disease); and
      • Have relapsed or been refractory after at least one standard chemotherapy regimen and at least one salvage treatment. Participants with Philadelphia chromosome + ALL must have failed prior tyrosine kinase inhibitor; and
      • Be ineligible for allogeneic stem cell transplant (SCT), have refused SCT, or have recurred after SCT; and
      • Be unable to access (in a timely manner), ineligible for, or have relapsed/failed after or not responded to a commercially available CD19 CAR T-cell construct; and
    • Have evidence of at least minimal residual disease or PET-avid disease (lymphoma) at the time of enrollment.

  • CD22/CD19 expression

    • Cohorts A1b, B1b, C2b

      • CD19 must be detected on >15% of the malignant cells by immunohistochemistry or > 80% by flow cytometry.
      • CD22 positivity must be confirmed.
    • Cohorts D1b, 2 B-ALL

      • CD19 or CD22 positivity must be confirmed
      • Age >= 3 years of age and <=39 years of age at time of enrollment.
      • Clinical Performance status: Participants >= 16 years of age: Karnofsky >= 50%; Participants < 16 years of age: Lansky scale >= 50%.
  • Participants must have adequate organ and marrow function as defined below:

    • leukocytes >= 750/mcL*

    • platelets >= 50,000/mcL*

    • total bilirubin <=2 X ULN (except in the case of participants with documented Gilbert's disease > 3x ULN)

    • AST(SGOT)/ALT(SGPT) <=10 X institutional upper limit of normal

    • creatinine <= the maximum for age listed in the table below OR

    • measured creatinine clearance >=60 mL/min/1.73 m^2 for participants with creatinine levels above the max listed below per age.

      • Age (Years) <= 5 / Maximum Serum Creatinine (mg/dL) <= 0.8

      • Age (Years) 6 to <= 10 / Maximum Serum Creatinine (mg/dL) <= 1.0

      • Age (Years) >10 / Maximum Serum Creatinine (mg/dL) <= 1.2

        • a participant will not be excluded because of pancytopenia >= Grade 3 if it is due to underlying bone marrow involvement by leukemia
  • Central nervous system (CNS) Status

  • Participants with leukemia with CNS 1 and 2 disease are eligible in the absence of exclusion criteria

  • Participants of child-bearing or child-fathering potential must be willing to practice effective birth control from the time of enrollment until 12 months following completion of study treatment for women and for 4 months following completion of study treatment for men.

  • Participants who are breastfeeding or plan to breastfeed must agree to discontinue/postpone breastfeeding while on study therapy and until 1 month after the administration of CAR.

  • Cardiac function: Left ventricular ejection fraction >= 45% or fractional shortening >=28%

  • Pulmonary Function

    • Baseline oxygen saturation >92% on room air at rest
  • Ability of participant or Legally Authorized Representative (LAR) to understand and the willingness to sign a written informed consent document.

  • Ability and willingness of participant or Legally Authorized Representative (LAR) to co- enroll on 15-C-0028: Follow-up Evaluation for Gene-Therapy Related Delayed Adverse Events after Participation in Pediatric Oncology Branch Clinical Trials.

EXCLUSION CRITERIA:

Participants meeting any of the following criteria are not eligible for participation in the study:

  • Participants with CNS3 disease, progressing neurologic signs* of CNS disease, radiologically detected active CNS lymphoma (*resolving manifestation or persistent and/or irreversible findings from prior CNS involvement (e.g., blindness) is not exclusionary)

  • Hyperleukocytosis (>= 50,000 blasts/microL)

  • Positive serum or urine beta-HCG pregnancy test performed at screening.

  • Participants will be excluded based on prior therapy if they fail to meet following washout criteria:

    • Therapy: Systemic Chemotherapy, anti-neoplastic agents, antibody- based therapies

    • Washout*: >=2 weeks

    • Exceptions: 6 weeks for clofarabine or nitrosoureas; No washout for prior intrathecal chemotherapy, steroid therapy, hydroxyurea (no dose increases within prior 2 weeks) or ALL maintenance-type chemotherapy (vincristine, 6-mercaptopurine, oral methotrexate, or a tyrosine kinase inhibitor for participants with Ph+ ALL) provided there is recovery from any acute toxic effects

    • Therapy: Radiation

    • Washout*: >=3 weeks

    • Exceptions: No time restriction with radiation therapy if the volume of bone marrow treated is less than 10% and the participant has measurable/evaluable disease outside the radiation window

    • Therapy: Allogeneic Stem Cell Transplant

    • Washout*: >= 100 days since SCT; >= 30 days since completion of immunosuppression; >= 6 weeks since donor lymphocyte infusion (DLI)

    • Exceptions: Cannot have evidence of active graft-versus-host disease (GVHD) requiring systemic immunosuppression

    • Therapy: CAR T-Cell Therapy or other Adoptive Cell Therapy

    • Washout*: > 30 days post infusion

      • Washout: Time between therapy and apheresis
  • Positive HIV antibodies consistent with active HIV.

  • Positive hepatitis C antibodies or positive Hepatitis B surface antigen (HbsAG) indicative of current/active HCV/HBV.

  • Active second malignancy other than in situ carcinoma of the cervix, unless the tumor was treated with curative intent at least two years previously and participant is in remission.

  • History of severe, immediate hypersensitivity reaction attributed to compounds of similar chemical or biologic composition to any agents used in study or in the manufacturing of the cells.

  • Uncontrolled, symptomatic, intercurrent illness or social situations that would limit compliance with study requirements or in the opinion of the PI would pose an unacceptable risk to the participant.

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Traitement
  • Répartition: Non randomisé
  • Modèle interventionnel: Affectation parallèle
  • Masquage: Aucun (étiquette ouverte)

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: 1/Phase I Dose Escalation-with standard LD - CLOSED

CD19/CD22-CAR-transduced T cells at escalating dose + standard LD (75 mg/mg2 Flu+ 900 mg/m2 Cy)

CD19/CD22-CAR-transduced T cells on D0 after lymphodepleting preparative regimen

Cyclophosphamide will be diluted in an appropriate solution and infused over one hour. The dose will be based on the patient s body weight, at 900 mg/m2/dose after fludarabine infusion.

Fludarabine is administered as an IV infusion in an appropriate solution over 30 minutes. To prevent undue toxicity the dose will be based on BSA (25 mg/m2/dose).

Expérimental: 1b/Phase 1 Dose Escalation - low disease burden

CD19/CD22-CAR-transduced T cells

CD19/CD22-CAR-transduced T cells on D0 after lymphodepleting preparative regimen

Cyclophosphamide will be diluted in an appropriate solution and infused over one hour. The dose will be based on the patient s body weight, at 900 mg/m2/dose after fludarabine infusion.

Fludarabine is administered as an IV infusion in an appropriate solution over 30 minutes. To prevent undue toxicity the dose will be based on BSA (25 mg/m2/dose).

Expérimental: 2/Phase I Dose Escalation- with intensified LD - CLOSED

CD19/CD22-CAR-transduced T cells + standard LD (120 mg/m2 Flu + 1200 mg/m2 Cy)

CD19/CD22-CAR-transduced T cells on D0 after lymphodepleting preparative regimen

Cyclophosphamide will be diluted in an appropriate solution and infused over one hour. The dose will be based on the patient s body weight, at 900 mg/m2/dose after fludarabine infusion.

Fludarabine is administered as an IV infusion in an appropriate solution over 30 minutes. To prevent undue toxicity the dose will be based on BSA (25 mg/m2/dose).

Expérimental: 2b/Phase 1 Dose Escalation - high disease burden

CD19/CD22-CAR-transduced T cells

CD19/CD22-CAR-transduced T cells on D0 after lymphodepleting preparative regimen

Cyclophosphamide will be diluted in an appropriate solution and infused over one hour. The dose will be based on the patient s body weight, at 900 mg/m2/dose after fludarabine infusion.

Fludarabine is administered as an IV infusion in an appropriate solution over 30 minutes. To prevent undue toxicity the dose will be based on BSA (25 mg/m2/dose).

Expérimental: 3/Phase II Dose Expansion- with low disease burden - CLOSED

CD19/CD22-CAR-transduced T cells at MTD/or highest dose administered with LD

CD19/CD22-CAR-transduced T cells on D0 after lymphodepleting preparative regimen

Cyclophosphamide will be diluted in an appropriate solution and infused over one hour. The dose will be based on the patient s body weight, at 900 mg/m2/dose after fludarabine infusion.

Fludarabine is administered as an IV infusion in an appropriate solution over 30 minutes. To prevent undue toxicity the dose will be based on BSA (25 mg/m2/dose).

Expérimental: 3b Phase I Dose Escalation: Either CD19 or CD22 positivity

CD19/CD22-CAR-transduced T cells

CD19/CD22-CAR-transduced T cells on D0 after lymphodepleting preparative regimen

Cyclophosphamide will be diluted in an appropriate solution and infused over one hour. The dose will be based on the patient s body weight, at 900 mg/m2/dose after fludarabine infusion.

Fludarabine is administered as an IV infusion in an appropriate solution over 30 minutes. To prevent undue toxicity the dose will be based on BSA (25 mg/m2/dose).

Expérimental: 4/Phase II Dose Expansion- with high disease burden - CLOSED

CD19/CD22-CAR-transduced T cells at MTD/or highest dose administered with LD regimen #2

CD19/CD22-CAR-transduced T cells on D0 after lymphodepleting preparative regimen

Cyclophosphamide will be diluted in an appropriate solution and infused over one hour. The dose will be based on the patient s body weight, at 900 mg/m2/dose after fludarabine infusion.

Fludarabine is administered as an IV infusion in an appropriate solution over 30 minutes. To prevent undue toxicity the dose will be based on BSA (25 mg/m2/dose).

Expérimental: 4b Phase II Dose Expansion in B-ALL/B-LBL

CD19/CD22-CAR-transduced T cells at RP2D

CD19/CD22-CAR-transduced T cells on D0 after lymphodepleting preparative regimen

Cyclophosphamide will be diluted in an appropriate solution and infused over one hour. The dose will be based on the patient s body weight, at 900 mg/m2/dose after fludarabine infusion.

Fludarabine is administered as an IV infusion in an appropriate solution over 30 minutes. To prevent undue toxicity the dose will be based on BSA (25 mg/m2/dose).

Aucune intervention: A/Pre-treatment

All participants enrolled on the study prior to treatment initiation.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Safety
Délai: 30 days post CAR T infusion

Assess the safety of administering escalating doses of autologous CD19/CD22-CAR engineered T cells in children and young adult with B cell ALL or lymphoma following a cyclophosphamide/fludarabine LD.

30 days post CAR T infusion
Efficacy
Délai: Monthly until 3 months post CAR T infusion and then at 6 months and every 6 months after that, for 2 years post-infusion for each participant, up to 2 years after the entry date of the last participant.

Determine the efficacy of CD19/CD22 therapy in participants with B-ALL/B-LBL.

Monthly until 3 months post CAR T infusion and then at 6 months and every 6 months after that, for 2 years post-infusion for each participant, up to 2 years after the entry date of the last participant.

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Assess response and toxicity (CRS grade)
Délai: Up to two years after last participant has entered

Assess overall response rate and CRS grades (toxicity) in participants who received subsequent infusion

Up to two years after last participant has entered
Overall response rate
Délai: Monthly until 3 months post infusion and then at 6 months and every 6 months after that, for 2 years post-infusion for each participant, for up to two years from the entry date of the last participant

Phase I: Evaluate the ability of CD19/CD22-CAR T cells to mediate clinical activity in children and young adults with CD19+ and/or CD22+ B cell ALL or lymphoma.

Monthly until 3 months post infusion and then at 6 months and every 6 months after that, for 2 years post-infusion for each participant, for up to two years from the entry date of the last participant
Progression free survival (PFS) and Overall survival (OS)
Délai: Up to two years after the last participant has entered.

Evaluate PFS and OS in participants, in the phase II cohort (inclusive of those treated in the phase 1 arms at the RP2D)

Up to two years after the last participant has entered.
Persistence and expansion
Délai: Up to two years after the last participant has entered.

Evaluate persistence and expansion of CD19/CD22-CAR T cells in children and young adults with CD19+ and/or CD22+ B-ALL or lymphoma

Up to two years after the last participant has entered.
Adverse Events
Délai: 30 days post CAR T infusion

Phase II: Assess the safety of CD19/CD22 therapy in participants with B-ALL/B-LBL regardless of disease burden and antigen expression.

30 days post CAR T infusion
Feasibility
Délai: Up to two years after the last participant has entered.

Determine the feasibility of producing CD19/CD22-CAR T cells meeting the established release criteria.

Up to two years after the last participant has entered.

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Les enquêteurs

  • Chercheur principal: Sara K Silbert, M.D., National Cancer Institute (NCI)

Publications et liens utiles

La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Réel)

28 décembre 2022

Achèvement primaire (Estimé)

1 juillet 2027

Achèvement de l'étude (Estimé)

1 juillet 2029

Dates d'inscription aux études

Première soumission

1 juillet 2022

Première soumission répondant aux critères de contrôle qualité

1 juillet 2022

Première publication (Réel)

5 juillet 2022

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

26 octobre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

23 octobre 2026

Dernière vérification

22 octobre 2026

Plus d'information

Termes liés à cette étude

Plan pour les données individuelles des participants (IPD)

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Description du régime IPD

All IPD recorded in the medical record will be shared with intramural investigators upon request.

Délai de partage IPD

Clinical data available during the study and indefinitely.

Critères d'accès au partage IPD

Clinical data will be made available via subscription to BTRIS and with the permission of the study PI.

Type d'informations de prise en charge du partage d'IPD

  • PROTOCOLE D'ÉTUDE
  • SÈVE
  • CIF

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Oui

Étudie un produit d'appareil réglementé par la FDA américaine

Non

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