NCT06379789 A Study to Investigate the Safety and Effectiveness of a Coagulation Factor IX Gene Insertion Therapy (REGV131-LNP1265) in Pediatric, Adolescent and Adult Participants With Hemophilia B
| NCT ID | NCT06379789 |
| Status | Recruiting |
| Phase | Phase 1, Phase 2 |
| Sponsor | Regeneron Pharmaceuticals |
| Condition | Hemophilia B |
| Study Type | INTERVENTIONAL |
| Enrollment | 130 participants |
| Start Date | 2024-09-11 |
| Primary Completion | 2034-08-14 |
Eligibility & Interventions
Eligibility Fast-Check
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What to Expect as a Participant
You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.
Phase 1 is the earliest stage of human testing — safety and dosage are the primary focus. Visits are frequent and medical supervision is intensive. You will be among the first people to receive this treatment.
This trial targets 130 participants in total. It began in 2024-09-11 with a primary completion date of 2034-08-14.
⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.
Brief Summary
Participants in this study have a genetic mutation, specifically in the coagulation (blood clotting) Factor 9 gene that causes severe or moderately severe hemophilia B. This study is researching an experimental gene insertion therapy (the adding of a gene into your DNA) called REGV131-LNP1265, also called the "study drug". Gene insertion therapy aims to teach the body how to produce clotting factor long-term, without the need for factor replacement therapy. The main aim of this study is to find a safe and well-tolerated dose of the study drug by checking the side effects that may happen from taking it, both in the near term and over time. The study is looking at several other research questions including: * How much study drug is in the blood at different times * Whether the body makes antibodies against parts of the study drug, which could make the drug less effective or could lead to side effects. Antibodies are proteins produced by the body's immune system in response to a foreign substance * Whether the body makes antibodies against the clotting factor replacement therapy * How often factor replacement therapy is needed, both on a regular basis for prevention of bleeding, and as needed to treat bleeding events (and it if changes after taking study drug) * Whether there is a difference in 2 different methods for measuring Factor 9 activity in the blood
Eligibility Criteria
Key Inclusion Criteria: 1. Confirmed diagnosis of severe or moderately severe hemophilia B with medical history of FIX functional activity (≤2% or \<0.02 IU/mL) or documented genotype known to produce severe hemophilia B 2. Currently taking FIX prophylaxis and previous experience with FIX therapy, as defined in the protocol 3. Participation in the lead-in period of this interventional study OR a separate lead-in study (R0000-HEMB-2187 \[NCT05568459\]) for at least 6 months for ABR data while taking FIX prophylaxis, as defined in the protocol Key Exclusion Criteria: 1. History of FIX inhibitor (clinical or laboratory-based assessment) on 2 or more occasions 2. Bethesda inhibitor titer greater than the Upper Limit of Normal (ULN) at screening 3. Detectable pre-existing antibodies to the AAV8 capsid; as measured by Enzyme-Linked ImmunoSorbent Assay (ELISA) at prescreening (or final lead-in visit, if applicable) 4. Any significant underlying liver disease such as: cholestatic liver disease, liver cirrhosis, portal hypertension, splenomegaly, hepatic encephalopathy 5. Evidence of advanced liver fibrosis or significant fatty liver, as defined in the protocol 6. Evidence of cirrhosis and/or portal hypertension as assessed by abdominal ultrasound at screening or measured within 6 months prior to the screening visit 7. History of arterial or venous thrombo-embolic events, as defined in the protocol 8. History of hypersensitivity to corticosteroids or known medical condition that requires chronic administration of corticosteroids 9. Previously received any AAV gene-based therapy or intends to receive approved or investigational AAV-based gene therapy other than REGV131-LNP1265 during the study period NOTE: Other Inclusion/Exclusion Protocol Defined Criteria Apply
Contact & Investigator
Clinical Trial Management
STUDY DIRECTOR
Regeneron Pharmaceuticals
Frequently Asked Questions
Who can join the NCT06379789 clinical trial?
This trial is open to male participants only, aged 2 Years or older, studying Hemophilia B. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.
What phase is the NCT06379789 trial and what does that mean for participants?
Phase 1 trials are the first stage of human testing. The primary goal is to assess safety and determine appropriate dosage levels. Participants are closely monitored. These trials typically involve a small number of volunteers.
Is NCT06379789 currently recruiting?
Yes, NCT06379789 is actively recruiting participants. Contact the research team at clinicaltrials@regeneron.com for enrollment information.
Where is the NCT06379789 trial being conducted?
This trial is being conducted at Phoenix, United States, Los Angeles, United States, Los Angeles, United States, Los Angeles, United States and 11 additional locations.
Who is sponsoring the NCT06379789 clinical trial?
NCT06379789 is sponsored by Regeneron Pharmaceuticals. The principal investigator is Clinical Trial Management at Regeneron Pharmaceuticals. The trial plans to enroll 130 participants.