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NCT04370054Active, not recruitingPhase 3

Study to Evaluate the Efficacy and Safety of PF-07055480 / Giroctocogene Fitelparvovec Gene Therapy in Moderately Severe to Severe Hemophilia A Adults

Phase 3, Open-Label, Single-Arm Study to Evaluate the Efficacy and Safety of PF-07055480 (Recombinant AAV2/6 Human Factor VIII Gene Therapy) in Adult Male Participants With Moderately Severe to Severe Hemophilia A(FVIII:C≤1%)

Source: ClinicalTrials.gov · Last updated 19 Aug 2026

Brief summary (registry, in English)

C3731003 is a pivotal Phase 3 study to evaluate the clinical efficacy and safety of a single IV infusion of PF-07055480 / giroctocogene fitelparvovec (Recombinant AAV2/6 Human Factor VIII Gene Therapy) in adult male participants with moderately severe or severe hemophilia A (FVIII:C≤1%) for the study duration of 5 years. The study will enroll eligible participants who have been followed on routine prophylaxis with FVIII products in the Lead-In study C0371004.

Status (registry)
Active, not recruiting
Phase (registry)
Phase 3
Study type
Interventional
Enrollment
77 (actual)
First submitted
21 Apr 2020
Start date
18 Aug 2020
Primary completion date
17 Jun 2024
Lead sponsor
Pfizer
Diseases
Haemophilia
NCT number
NCT04370054
EU CT number
2024-512075-12-00
EudraCT number
2019-004451-37

What you commit to

  • Study type: Interventional · Phase 3
  • Participants enrolled: 77
  • From 18 Aug 2020 to the primary completion date, 17 Jun 2024
  • 41 sites in 16 countries
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Criteria the registry did not label

  • Main inclusion Criteria
  • Males who have been followed on routine Factor VIII prophylaxis therapy during the lead-in study (C0371004) and have \> = 150 documented exposure days to a Factor VIII protein product
  • Moderately severe to severe hemophilia A (Factor VIII activity \< =1%)
  • Suspension of FVIII prophylaxis therapy post study drug infusion
    • Main exclusion Criteria
  • Anti-AAV6 neutralizing antibodies
  • History of inhibitor to Factor VIII
  • Laboratory values at screening visit that are abnormal or outside acceptable study limits
  • Significant and/or unstable liver disease, biliary disease, significant liver fibrosis
  • Conditions associated with increased thromboembolic risk such as inherited or acquired thrombophilia, or a history of thrombotic events
  • Planned surgical procedure requiring Factor VIII surgical prophylactic factor treatment 12 months from screening visit
  • Active hepatitis B or C
  • Serological evidence of human immunodeficiency virus HIV-1 or HIV-2 with Cluster of Differentiation 4 positive (CD4+) cell count ≤200 mm3 and/or viral load \>20 copies/mL

Age in the registry: 18 years to 64 years · Sex: Male · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (41)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
The Alfred Hospital
Coordinator of this site? Confirm its status
MelbourneAustraliaUnknown status
Universidade Estadual de Campina
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CampinaBrazilUnknown status
Juravinski Hospital - Hamilton Health Sciences
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HamiltonCanadaUnknown status
McMaster University Medical Centre, Hamilton Health Sciences
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HamiltonCanadaUnknown status
Hamilton Health Sciences Corporation
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HamiltonCanadaUnknown status
Vivantes MVZ GmbH
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BerlinGermanyActive, not recruiting
Hospital Universitario Rio Hortega
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ValladolidSpainActive, not recruiting
Hopital Necker Enfants Malades
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ParisFranceActive, not recruiting
Guy's and St Thomas' NHS Foundation Trust
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LondonUnited KingdomUnknown status
Hippokration Hospital
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AthensGreeceActive, not recruiting
Azienda Ospedaliero Universitaria Careggi SODc Malattie Emorragiche e della Coagulazione
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FlorenceItalyUnknown status
Dip. di Medicina Clinica e Chirurgia, Università degli Studi di Napoli Federico II - UOC di Medicina
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NaplesItalyUnknown status
Università degli studi di Roma "La Sapienza"- Policlinico Umberto I
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RomaItalyUnknown status
Saitama Medical University Hospital
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Iruma-gunJapanUnknown status
Nagoya University Hospital - Transfusion Medicine
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NagoyaJapanUnknown status
Kyung Hee University Hospital at Gangdong
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SeoulSouth KoreaUnknown status
King Faisal Specialist Hospital & Research Center
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RiyadhSaudi ArabiaUnknown status
University Of Skane
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MalmoSwedenActive, not recruiting
National Taiwan University Hospital
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TaipeiTaiwanUnknown status
NOW Physical Therapy
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Mountain ViewUnited StatesUnknown status
Regents of The University of California
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OaklandUnited StatesUnknown status
Clinical and Translational Research Unit (CTRU)
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Palo AltoUnited StatesUnknown status
Lucile Packard Childrens Hospital
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Palo AltoUnited StatesUnknown status
The Board of Trustees of the Leland Stanford Junior University
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Redwood CityUnited StatesUnknown status
Imaging Clinic at Stanford Medicine Outpatient Center in Redwood City
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Redwood CityUnited StatesUnknown status
UCSF Outpatient Radiology.
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San FranciscoUnited StatesUnknown status
UCSF Outpatient Radiology (alternate location)
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San FranciscoUnited StatesUnknown status
University of California, San Francisco - Moffitt/Long Inpatient Hematology
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San FranciscoUnited StatesUnknown status
UCSF IDS Pharmacy
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San FranciscoUnited StatesUnknown status
UCSF lnvestigational Drug Service
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San FranciscoUnited StatesUnknown status
University of California, San Francisco - Outpatient Hematology Clinic
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San FranciscoUnited StatesUnknown status
University of California, San Francisco - Clinical Research Center
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San FranciscoUnited StatesUnknown status
Access Sourcecorp Deliverex (off-site storage)
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San JoseUnited StatesUnknown status
University of Washington Medical Center - Translational Research Unit (TRU)
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SeattleUnited StatesUnknown status
Washington Institute for Coagulation
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SeattleUnited StatesUnknown status
Stanford Health Care
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StanfordUnited StatesUnknown status
Stanford Health Care (hospital and IDS pharmacy)
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StanfordUnited StatesUnknown status
Adana Acibadem Hospital
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AdanaTurkey (Türkiye)Unknown status
Gaziantep University Sahinbey Research and Training Hospital
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GaziantepTurkey (Türkiye)Unknown status
Ege University Medical Faculty
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IzmirTurkey (Türkiye)Unknown status
Ege University Medical Faculty, Pediatric Hematology
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IzmirTurkey (Türkiye)Unknown status

This page is information, not medical advice. Discuss any trial with your doctor.