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Gene Therapy for Fanconi Anemia, Complementation Group A

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Rocket Pharmaceuticals

Status and phase

Active, not recruiting
Phase 2

Conditions

Fanconi Anemia Complementation Group A

Treatments

Biological: RP-L102

Study type

Interventional

Funder types

Industry

Identifiers

NCT04248439
RP-L102-0319

Details and patient eligibility

About

The objective of this study is to assess the therapeutic efficacy of a hematopoietic cell-based gene therapy for patients with Fanconi anemia, subtype A (FA-A).

Hematopoietic stem cells from mobilized peripheral blood of patients with FA-A will be transduced ex vivo (outside the body) with a lentiviral vector carrying the FANCA gene. After transduction, the corrected stem cells will be infused intravenously back to the patient with the goal of preventing bone marrow failure.

Full description

This is a pediatric open-label Phase II clinical trial to assess the efficacy of a hematopoietic gene therapy consisting of autologous CD34+ enriched cells transduced with a lentiviral vector carrying the FANCA gene in subjects with FA-A.

Enriched CD34+ hematopoietic stem cells will be transduced ex vivo with the therapeutic lentiviral vector and infused via intravenous infusion following transduction without any prior conditioning.

Enrollment

5 estimated patients

Sex

All

Ages

1+ year old

Volunteers

No Healthy Volunteers

Inclusion criteria

  1. Fanconi anemia as diagnosed by chromosomal fragility assay of cultured lymphocytes in the presence of DEB or a similar DNA-crosslinking agent

  2. Subject of the complementation group FA-A

  3. Minimum age: 1 year and a minimum weight of 8 kg

  4. At least 30 CD34+ cells/μL are determined in one bone marrow (BM) aspiration within 3 months prior to CD34+ cell collection OR

  5. Provide informed consent in accordance with current legislation 7. Women of childbearing age must have a negative urine pregnancy test at the baseline visit, and accept the use of an effective contraception method during participation in the trial

Exclusion criteria

  1. Subjects with an available and medically eligible HLA-identical sibling donor.

  2. Evidence of myelodysplastic syndrome or leukemia, or cytogenetic abnormalities other than those reported as variant(s) of normal in BM aspirate analysis. This assessment should be made by valid studies conducted within the 3 months before the subject commences the stem cell mobilization/collection procedures of the clinical trial.

  3. Subjects with somatic mosaicism associated with stable or improved counts in all PB cell lineages. (If T-lymphocyte chromosomal fragility analysis indicates potential mosaicism, a medically significant decrease (≥1 NCI CTCAE grade) in at least one blood lineage over time must be documented to enable eligibility, as should <5% resistance of bone marrow colony forming cells (CFCs) to 10nM MMC; whenever possible potential mosaicism should also be evaluated by gene sequencing of MMC-resistant CFCs).

  4. Lansky performance status ≤60%.

  5. Any concomitant disease or condition that, in the opinion of the Principal Investigator, renders the subject unfit to participate in the study.

  6. Pre-existing sensory or motor impairment ≥grade 2 according to the criteria of the NCI.

  7. Pregnant or breastfeeding women.

  8. Hepatic dysfunction as defined by either:

    • Bilirubin >3.0 × the upper limit of normal (ULN) or
    • Alanine aminotransferase (ALT) > 5.0 × ULN or
    • Aspartate aminotransferase (AST) > 5.0 × ULN

    For subjects with bilirubin, ALT or AST above ULN, a workup to identify the etiology of liver abnormality should be conducted prior to confirmation of eligibility as stipulated in exclusion criterion 5, including evaluation of viral hepatitis, iron overload, drug injury or other causes.

  9. Renal dysfunction requiring either hemodialysis or peritoneal dialysis.

  10. Pulmonary dysfunction as defined by either:

    • Need for supplemental oxygen during the prior 2 weeks in absence of acute infection or
    • Oxygen saturation by pulse oximetry <90%.
  11. Evidence of active metastatic or locoregionally advanced malignancy for which survival is anticipated to be less than 3 years.

  12. Subject is receiving androgens (i.e. danazol, oxymetholone).

  13. Subject is receiving other investigational therapy for treatment/prevention of FA-associated bone marrow failure.

Trial design

Primary purpose

Treatment

Allocation

N/A

Interventional model

Single Group Assignment

Masking

None (Open label)

5 participants in 1 patient group

RP-L102
Experimental group
Description:
RP-L102 is CD34+ enriched cells from subjects with Fanconi anemia subtype A transduced ex vivo with a lentiviral vector carrying the FANCA gene
Treatment:
Biological: RP-L102

Trial contacts and locations

2

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Central trial contact

Clinical Information

Data sourced from clinicaltrials.gov

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