FANCA Gene Transfer for Fanconi Anemia Using a High-safety, High-efficiency, Self-inactivating Lentiviral Vector

Not Applicable

• Conditions: Fanconi Anemia
• Interventions: Genetic: Gene-modified autologous stem cells

• Registration Number: NCT03351868
• Lead Sponsor: Shenzhen Geno-Immune Medical Institute

Brief Summary

This is a Phase I/II clinical trial of gene therapy for treating Fanconi anemia using a self-inactivating lentiviral vector to functionally correct the defective gene. The objectives are to evaluate the safety and efficacy of the gene transfer clinical protocol.

Detailed Description

Fanconi anemia is a rare, inherited disease that is caused by a gene defect and that primarily affects an individual's bone marrow, resulting in decreased production of blood cells. The major problem for most patients is aplastic anemia, the blood counts for red blood cells, white blood cells, and platelets are low. In addition, some patients have physical defects usually involving the skeleton and kidneys. Fanconi anemia is typically diagnosed in childhood, and there is a high fatality rate. Hematopoietic stem cell transplantation (HSCT) is a common treatment for Fanconi anemia. However, there are many risks associated with HSCT including rejection of the transplanted cells and graft-versus-host disease.

The primary objectives are to evaluate the safety of the self-inactivating lentiviral vector, the ex vivo gene transfer clinical protocol and the efficacy of immune reconstitution in patients overcoming immune abnormalities present at the time of treatment, assessment of gene correction efficiency, and finally the long-term correction of Fanconi anemia associated disease symptoms.

Study Timeline

• Study First Submitted: 2017-11-20
• Study First Submitted QC: 2017-11-20
• Study First Posted: 2017-11-24
• Study Start: 2017-12-01
• Status Verified: 2019-09
• Last Update Submitted: 2019-09-18
• Last Update Posted: 2019-09-19
• Primary Completion: 2020-12-31
• Study Completion: 2021-12-31

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 10

Inclusion Criteria

1. Diagnosis of Fanconi anemia FANCA type based on DNA sequencing and sensitivity test for chromosomal cleavage by mitomycin C or butylene oxide.

2. No cytogenetic abnormalities and the proportion of myelodysplastic abnormalities does not exceed 5% within 3 months prior to stem cell collection.

3. Age: ≥ 4 years.

4. Karnofsky: ≥ 70%.

5. ANC ≥ 5×10^8/L; PLT ≥ 2×10^10/L.

6. Hemoglobin ≥ 8g/dL.

7. Proper renal and hepatic functions (ULN denotes "upper limit of normal range") with

   • serum creatinine ≤ 1.5×ULN;
   • serum bilirubin ≤ 3×ULN;
   • AST/ALT ≤ 5×ULN.

8. Pulmonary function is normal; DLCO > 50%.

9. Written, informed consent obtained prior to any study-specific procedures.

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Exclusion Criteria

1. Diagnosis of active malignant disease or myelodysplastic syndrome.
2. Diagnosis of myeloid leukemia.
3. Pregnant or lactating females.
4. Existence of an available HLA-identical related donor.
5. Subject infected with HBV (HBsAg positive), HIV (HIV antibody positive), HTLV (HTLV antibody positive), Treponema pallidum antibody positive or TB culture positive.
6. Patients, in the opinion of investigators, may not be eligible or not able to comply with the study.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Gene-modified autologous stem cells	Gene-modified autologous stem cells	Autologous hematopoeitic stem cells and mesenchymal stem cells transduced with lentiviral vector carrying the FANCA gene ex vivo

Primary Outcome Measures

Name	Time	Method
Safety in patients using CTCAE version 4.0 standard to evaluate the level of adverse events	6 months	Physiological parameter (measuring cytokine response, fever, symptoms)

Secondary Outcome Measures

Name	Time	Method
Quality of life	1 year	Quality of life will be measured using the Functional Assessment of Cancer Therapy-General (FACT-G) before and after treatment.
Treatment responses	1 year	Blood routine indexes will be obtained before and after treatment. Objective response, such as complete response (CR), partial response (PR), stable disease (SD), or progressive disease (PD) will be assessed by the Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 criteria

Trial Locations

Locations (3)

Beijing Children's Hospital; 🇨🇳 Beijing, Beijing, China

Capital Institute of Pediatrics affiliated Children's hospital; 🇨🇳 Beijing, Beijing, China

Shenzhen Geno-immune Medical Institute; 🇨🇳 Shenzhen, Guangdong, China