A Study of FVIII Gene Therapy for Hemophilia A

NCT ID: NCT05454774

Last Updated: 2025-02-21

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: EARLY_PHASE1
• Total Enrollment: 8 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-07-19
• Study Completion Date: 2027-09-15

Brief Summary

This is a single-arm, open-label, clinical study to evaluate the safety, tolerability of BBM 002 injection in Hemophilia A subjects with residual factor VIII (FVIII) levels ≤2 International unit per deciliter (IU/dl) .

BBM 002 injection is an adeno-associated virus (AAV) vector derived from recombinant DNA techniques to contain an expression cassette of the human factor VIII (hFVIII) transgene and raises circulating levels of endogenous FVIII.

Conditions

Hemophilia A

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Arm of BBM 002

1×10\^13 vg/kg, Single-dose treatment.

Group Type: EXPERIMENTAL

Single dose intravenous injection of BBM 002

Intervention Type: GENETIC

Single dose intravenous infusion of BBM 002, an adeno-associated virus (AAV) vector derived from recombinant DNA techniques to contain an expression cassette of the human factor VIII (hFVIII) transgene in liver. The dose of BBM 002 will be 1×10\^13 vg/ kg

Interventions

Single dose intravenous injection of BBM 002

Single dose intravenous infusion of BBM 002, an adeno-associated virus (AAV) vector derived from recombinant DNA techniques to contain an expression cassette of the human factor VIII (hFVIII) transgene in liver. The dose of BBM 002 will be 1×10\^13 vg/ kg

Intervention Type: GENETIC

Eligibility Criteria

Inclusion Criteria

1. Subjects are fully aware of the purpose, nature, methods and possible adverse reactions of the trial and voluntarily sign informed consent.

2. Males ≥ 18 years of age.

3. Have hemophilia A with ≤2 IU/dL (≤2 %) endogenous FVIII activity levels.

4. Have had ≥150 prior exposure days (EDs) to any recombinant and/or plasma-derived FVIII protein products.

5. Have had bleeding events and/or infusions with FVIII protein products (including recombination and plasma source) during the last 12 weeks documented in the subjects' medical records.

6. Have no prior history of hypersensitivity or anaphylaxis associated with any FVIII or IV immunoglobulin administration.

7. Have no FVIII inhibitor. (eg <0.6BU/ml Bethesda Units; or the patient's FVIII inhibitor titer was detected <0.6BU/ml in 2 consecutive times within 1-4 weeks using Bethesda method or Nijmegen method), or no prior medical history of FVIII inhibitor after 150 EDs of FVIII products; no clinical signs or symptoms of decreased response to FVIII products infusion.

8. Agree to use a reliable barrier contraception method from the beginning of signing the informed consent to 52 weeks after BBM002 infusion.

9. Compliance is good, patients and their families have the will of 'gene therapy' clinical trials.

Exclusion Criteria

1. Being positive for hepatitis B surface antigen (HBsAg) or hepatitis B virus-DNA (HBV-DNA). Being positive for hepatitis C virus antibody (HCV-Ab) or hepatitis C virus RNA (HCV-RNA).

2. Currently on antiviral therapy for hepatitis B or C.

3. Patients with coagulation disorders in addition to hemophilia A.

4. Use of any other systematic immunosuppressant other than glucocorticoids within 30 days prior to enrollment.

5. Patients with vaccination history within 30 days prior to screening.

6. Have potential liver diseases, such as previous diagnosis of portal hypertension, splenomegaly, hepatic encephalopathy or liver fibrosis (fibrosis stage ≥ 3); nodules or cysts were found by B ultrasound, or elevated alpha-fetoprotein was detected by laboratory tests. Subjects who are not eligible for the study if the abnormalities are clinically significant by researchers.

7. Patients with known planned major surgery schedule during the 52-week study period aren't eligible.

8. Have participated in a previous gene therapy research trial before screening, or in a clinical study with an investigational drug within 5 half-life of the investigational product, whichever is longer.

9. Have alcohol or drug dependence, or cannot stop drinking throughout the study. 10.Any concurrent clinically significant major disease or condition that the investigator deems unsuitable for participation in the study.

• Minimum Eligible Age: 18 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: No

Sponsors

Institute of Hematology & Blood Diseases Hospital, China

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Lei Zhang, MD

Role: STUDY_CHAIR

Institute of Hematology & Blood Diseases Hospital Chinese Academy of Medical Sciences & Peking Union Medical College

Locations

Institute of Hematology & Blood Diseases Hospital

Tianjin, Tianjin Municipality, China

Site Status: RECRUITING

Countries

China

Central Contacts

Lei Zhang, MD

Role: CONTACT

zhanglei1@ihcams.ac.cn

0086-22-23909095

Facility Contacts

Lei Zhang, MD

Role: primary

zhanglei1@ihcams.ac.cn

0086-22-23909095

Other Identifiers

IIT2022019

Identifier Type: -

Identifier Source: org_study_id