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Clinical Trials in the EU / 2025-523660-21-00
Ongoing Phase III

C0371017 - A PHASE 3, NON-INVESTIGATIONAL PRODUCT, MULTI COUNTRY COHORT STUDY TO DESCRIBE THE LONG-TERM SAFETY AND EFFECTIVENESS OF A PRIOR SINGLE-DOSE TREATMENT WITH INVESTIGATIVE GIROCTOCOGENE FITELPARVOVEC OR FIDANACOGENE ELAPARVOVEC IN PARTICIPANTS WITH HEMOPHILIA A OR HEMOPHILIA B, RESPECTIVELY

2025-523660-21-00 · tracked via the Priya Life Science EU tracker
Sponsor
Pfizer Inc.
Sponsor type
Pharmaceutical company
Therapeutic area
Hemic and Lymphatic Diseases
Decision date
20/04/2026
Enrollment target
32
Sites
Italy, Germany, France, Spain, Sweden, Greece

Condition studied

severe to moderately severe hemophilia B (FIX:C ≤ 2%), hemophilia A

Investigational medicinal product(s)

giroctocogene fitelparvovecfidanacogene elaparvovec

Eligibility

Age group
18-64 years
Sex
Male

Primary endpoint

Incidence of thromboembolic events, Incidence of factor inhibitor development, Incidence of hepatic malignancy, Incidence of liver abnormalities, Factor activity level

Endpoint detail

Total ABR (treated and untreated), Incidence of and time from previously administered gene therapy infusion to resumption of prophylaxis, AIR of exogenous factor, Consumption of exogenous factor, Incidence of Non-hepatic malignancy, Incidence of Auto-immune disorders, Incidence of SAEs, All cause-mortality, EQ-5D-5L dimension and VAS scores

Official registry record

This page summarises publicly available CTIS data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.

View 2025-523660-21-00 on CTIS ↗ ← All trials in the EU