ArticleBlood advances2019
Etranacogene dezaparvovec (AMT-061 phase 2b): normal/near normal FIX activity and bleed cessation in hemophilia B.
Article in Blood advances, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. It is linked to trial NCT03489291 (Phase IIb, Open-label, Single-dose, Single-arm, Multi-center Trial to Confirm the Factor IX Activity Level of the Serotype 5 Adeno-associated Viral Vector Containing the Padua Variant of a Codon-optimized Human Factor IX Gene), which is not on this map. Cited by 69 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Phase IIb, Open-label, Single-dose, Single-arm, Multi-center Trial to Confirm the Factor IX Activity Level of the Serotype 5 Adeno-associated Viral Vector Containing the Padua Variant of a Codon-optimized Human Factor IX Gene (AAV5-hFIXco-Padua, AMT-061) Administered to Adult Subjects With Severe or Moderately Severe Hemophilia B
Who cites it
69 citing papers in PubMed, 1 synthesis or guideline pooled it, 128 citations in OpenAlex.
- A systematic review of immunosuppressive protocols used in AAV gene therapy for monogenic disorders.Molecular therapy : the journal of the American Society of Gene Therapy · 2024Pooled it
- Completion of phase 2b trial of etranacogene dezaparvovec gene therapy in patients with hemophilia B over 5 years.Blood advances · 2025Trial
- Field Study and Correlative Studies of Factor IX Variant FIX-R338L in Participants Treated with Fidanacogene Elaparvovec.Thrombosis and haemostasis · 2024Trial
- Development of an Agent-Based Model to Investigate Durability of Factor IX Activity in Hemophilia B Patients Treated With Etranacogene Dezaparvovec.CPT: pharmacometrics & systems pharmacology · 2026Article
- Safety of Adeno-Associated Viral Vectors in Gene Therapy: Mechanisms of Toxicity, Clinical Risks, and Strategies for Their Minimization.International journal of molecular sciences · 2026Review
- Reply to a letter from Miesbach and Srivastava: response to hemophilia B gene therapy based on adeno-associated virus serotype 5 antibody status.Research and practice in thrombosis and haemostasis · 2026Article
- Hemophilia B gene therapy: a NAb-solute barrier overcome by adeno-associated virus serotype 5.Research and practice in thrombosis and haemostasis · 2026Article
- Response to hemophilia B gene therapy based on adenoassociated virus serotype 5 antibody status.Research and practice in thrombosis and haemostasis · 2026Article
- Signal Peptide Engineering and Codon Optimization to Enhance α-Gal A Activity for rAAV Gene Therapy of Fabry Disease.Journal of inherited metabolic disease · 2026Article
- A Paradigm Shift in Hemophilia Care: The Promise of Gene Therapy.Current gene therapy · 2026Review
- Translational insights from nonclinical studies of AAV gene therapies for hemophilia: mechanisms underpinning variability and durability of gene expression.Therapeutic advances in hematology · 2026Review
- Etranacogene dezaparvovec in people with hemophilia B with preexisting adeno-associated virus 5 neutralizing antibodies: 4-year subgroup results from the HOPE-B trial.Research and practice in thrombosis and haemostasis · 2026Article
- Deconstructing gene therapy in hemophilia for the clinician.Hematology. American Society of Hematology. Education Program · 2025Review
- Population Modeling of Factor IX Activity Following Administration of Fidanacogene Elaparvovec Gene Therapy in Participants with Hemophilia B.Clinical pharmacokinetics · 2025Article
- Natural history of preexisting AAV5 antibodies in adults with hemophilia B during the lead-in of the etranacogene dezaparvovec phase 3 study.Molecular therapy. Methods & clinical development · 2025Article
- Evaluation of One-Stage Assays for the Monitoring of Recombinant Human Factor IX Padua Activity After Etranacogene Dezaparvovec Gene Therapy.Haemophilia : the official journal of the World Federation of Hemophilia · 2025Article
- Cardiac-Targeted AAV5-S100A1 Gene Therapy Protects Against Adverse Remodeling and Contractile Dysfunction in Postischemic Hearts.Circulation. Heart failure · 2025Article
- Current clinical applications of AAV-mediated gene therapy.Molecular therapy : the journal of the American Society of Gene Therapy · 2025Review
- Gene therapy for hemophilia - From basic science to first approvals of "one-and-done" therapies.Molecular therapy : the journal of the American Society of Gene Therapy · 2025Review
- CRISPR/Cas9 mediated generation of zebrafish f9a mutant as a model for hemophilia B.Blood coagulation & fibrinolysis : an international journal in haemostasis and thrombosis · 2025Article
9 more citing papers are in PubMed but not listed here.
Corrections and comments
- Erratum issued
Authors and funding
12 authors at 8 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Etranacogene dezaparvovec (AMT-061) is a recombinant AAV5 vector including a gene cassette containing the factor IX (FIX) Padua variant under the control of a liver-specific promoter. A phase 2b study was conducted to confirm that a single dose of 2 × 1013 genome copies per kilogram of etranacogene dezaparvovec will result in FIX activity ≥5% 6 weeks after dosing. Secondary end points included FIX activity at other time points, bleed frequency, FIX replacement, and safety. Etranacogene dezaparvovec was administered as a single IV infusion to 3 adults with severe to moderately severe hemophilia B. Before treatment, participants had low levels of preexisting neutralizing antibodies to AAV5. This article reports a planned 26-week interim assessment. At week 6, mean FIX activity was 31% (23.9%-37.8%), increasing to 47% (33.2%-57.0%) at 26 weeks, with 2 subjects exhibiting sustained activity >40%. Consistent with the FIX activity, etranacogene dezaparvovec was associated with a complete bleed cessation with no need for FIX replacement therapy up to 26 weeks. Etranacogene dezaparvovec was generally well tolerated. No clinically significant elevations in levels of liver enzymes or inflammatory markers were observed, and no use of corticosteroids related to treatment was required. In individuals with severe to moderately severe hemophilia B, etranacogene dezaparvovec resulted in clinically relevant increases in FIX activity, cessation of bleeds, and abrogation of the need for FIX replacement, despite the presence of preexisting anti-AAV5 neutralizing antibodies detected by using a highly sensitive luciferase assay. Consistency of results in the 3 participants supported an expanded evaluation of the safety/efficacy of etranacogene dezaparvovec in the HOPE-B (Health Outcomes With Padua Gene; Evaluation in Hemophilia-B) phase 3 trial. The current trial was registered at www.clinicaltrials.gov as #NCT03489291.
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.