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Uno studio per testare un farmaco (Fitusiran) per prevenire i sanguinamenti in persone affette da emofilia grave che hanno precedentemente ricevuto un trattamento preventivo con emicizumab

18 settembre 2026 aggiornato da: Sanofi

Uno studio in aperto, a braccio singolo, per indagare la sicurezza e la tollerabilità del passaggio dalla profilassi con emicizumab alla profilassi con fitusiran in partecipanti di sesso maschile di età ≥ 18 anni affetti da emofilia A grave, con o senza inibitori

This is an exploratory, single group, Phase 4, study to assess treatment with fitusiran prophylaxis after switching from emicizumab prophylaxis.

This study aims to evaluate the safety and tolerability of switching to fitusiran after a transition period from the last dose of emicizumab. The study will be conducted in male participants with severe hemophilia A, with or without inhibitors, aged ≥12 years, who were previously receiving emicizumab prophylaxis.

Study details include:

  • The study duration will be up to approximately 28 months:

    • There will be an approximately 2-month screening period.
    • There will be an approximately 2-month period before fitusiran treatment starts (pre-fitusiran treatment period)
    • The fitusiran treatment duration will be up to 18-months (fitusiran treatment period)
    • The antithrombin (AT) follow-up (FU) period will be approximately 6 months after the last dose of fitusiran (during which the AT activity level will be monitored at approximately monthly intervals following the final fitusiran dose until AT activity levels return to at least 60%).
  • The study site visits are scheduled at monthly/ every 2 months intervals of 28 days (4 weeks) / 56 days (8 weeks), respectively, during the fitusiran treatment period.

Panoramica dello studio

Stato

Reclutamento

Condizioni

Intervento / Trattamento

Tipo di studio

Interventistico

Iscrizione (Stimato)

20

Fase

  • Fase 4

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

  • Nome: Trial Transparency email recommended (Toll free for US & Canada)
  • Numero di telefono: option 6 800-633-1610
  • Email: Contact-US@sanofi.com

Luoghi di studio

    • California
      • Los Angeles, California, Stati Uniti, 90027
        • Reclutamento
        • Children's Hospital Los Angeles- Site Number : 8400005
    • Mississippi
      • Flowood, Mississippi, Stati Uniti, 39232
        • Reclutamento
        • Southern Specialty Research- Site Number : 8400011
      • Taipei, Taiwan, 100
        • Reclutamento
        • Investigational Site Number : 1580001

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

12 anni e precedenti (Bambino, Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Maschio

Descrizione

Inclusion Criteria:

  • Male participants must be ≥12 years of age inclusive, at the time of signing the informed consent

  • Diagnosis of severe congenital hemophilia A (FVIII < 1%) as evidenced by a central laboratory measurement at screening or documented medical record evidence.

    • Inhibitor titer of ≥0.6 BU/mL at Screening, or
    • Inhibitor titer of <0.6 BU/mL at Screening with medical record evidence of 2 consecutive titers ≥0.6 BU/mL, or
    • Inhibitor titer of <0.6 BU/mL at Screening with medical record evidence of anamnestic response.
  • Participants who are currently on the full labeled dose of emicizumab prophylaxis, irrespective of inhibitor/non-inhibitor status.

  • Signed informed consent/assent which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.

Exclusion Criteria:

Participants are excluded from the study if any of the following criteria apply:

  • Known coexisting bleeding disorders
  • History of antiphospholipid antibody syndrome.
  • History of arterial or venous thromboembolism, atrial fibrillation, significant valvular disease, myocardial infarction, angina, transient ischemic attack, or stroke. Participants who have experienced thrombosis associated with indwelling venous access may be enrolled.
  • Presence of clinically significant liver disease
  • Current or prior participation in a fitusiran trial
  • Current or prior participation in a gene therapy trial
  • AT activity <60% at Screening, as determined by central laboratory measurement
  • Coexisting thrombophilic disorder - Hepatitis C virus antibody positive, except participants who have negative Hepatitis C viral load and no evidence of cirrhosis
  • Presence of acute hepatitis, ie, hepatitis A, hepatitis E.
  • Presence of acute or chronic hepatitis B infection
  • Known to be HIV positive with CD4 count <200 cells/μL.
  • Reduced renal function

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: N / A
  • Modello interventistico: Assegnazione di gruppo singolo
  • Mascheramento: Nessuno (etichetta aperta)

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: fitusiran

The pre-fitusiran treatment period is defined as the transition period up to the first fitusiran administration. Participants will receive on demand or prophylactic treatment with intravenous clotting factor concentrates (IV CFCs) or bypassing agents (BPAs) from Month-2 until Day 1.

Fitusiran treatment period: Participants will receive subcutaneous (SC) fitusiran prophylaxis once every 2 months (Q2M) or once monthly (QM) from Day 1 until Month18.

Participants may receive IV antithrombin concentrate (ATIIIC) upon investigator's judgement.

AT FU period: Participants will be followed up until AT activity levels recover to at least 60% (per central laboratory).

In case of bleeding events participants will receive IV CFCs or BPAs. Participants may receive IV ATIIIC upon investigator's judgement.

Pharmaceutical form:Solution for injection-Route of administration:Subcutaneous (SC) injection

Altri nomi:
  • SAR439774, Qfitlia®

Pharmaceutical form: Solution for injection-Route of administration: Intravenous (IV) injection

Pharmaceutical form:Solution for injection-Route of administration:Intravenous (IV) injection

Pharmaceutical form:Solution for injection-Route of administration:SC injection

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Number of participants with Adverse events (AEs) during the fitusiran treatment
Lasso di tempo: From Day 1 up to Month 4

Incidence, severity, and seriousness, of AEs occurred during fitusiran treatment period will be reported

From Day 1 up to Month 4

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
The peak thrombin generation (TG) - pre fitusiran treatment
Lasso di tempo: From Month -2 up to Day 1

Central laboratory assessments (peak TG) will be reported for pre-fitusiran period

From Month -2 up to Day 1
The peak TG during fitusiran treatment
Lasso di tempo: From Day 1 up to Month 4

Central laboratory assessments (peak TG) will be reported for fitusiran treatment period

From Day 1 up to Month 4
The antithrombin (AT) levels during pre-fitusiran treatment
Lasso di tempo: From Month -2 up to Day 1

Central laboratory assessments (AT) will be reported for pre-fitusiran treatment period

From Month -2 up to Day 1
The AT levels during fitusiran prophylaxis
Lasso di tempo: From Day 1 up to Month 4

Central laboratory assessments (AT) will be reported for fitusiran treatment

From Day 1 up to Month 4
Emicizumab concentrations in plasma
Lasso di tempo: Up to Month 4 of fitusiran treatment

Emicizumab concentrations in plasma will be reported

Up to Month 4 of fitusiran treatment
Number of participants with AEs from Day 1 to Month 18 of fitusiran treatment
Lasso di tempo: From Day 1 up to Month 18

Incidence, severity, and seriousness of AEs will be reported

From Day 1 up to Month 18
Change in participants' overall treatment satisfaction during the fitusiran treatment period assessed via the Treatment Satisfaction Questionnaire for Medication (TSQM-9) domain scores
Lasso di tempo: From approximately Month -2 to Month 19 [end of study (EoS) visit]

The three domains of effectiveness, convenience, and global satisfaction will be reported

From approximately Month -2 to Month 19 [end of study (EoS) visit]
Participants' treatment preferences (via the Preference Questionnaire)
Lasso di tempo: At Month 12

The Preference questionnaire Data will be reported

At Month 12
Change in adult participants' pain intensity during the fitusiran treatment period over time
Lasso di tempo: From approximately Month - 2 to Month 19 (EoS) visit

The PROMIS (Patient-Reported Outcomes Measurement Information System) Pain Intensity 3a v2.0 consists of three items measuring the worst, average, and current intensity of pain with a recall period of 7 days. Each question has five response options ranging from one ('no pain') to five ('very severe').

Adult participants (age ≥ 18 years) will self-complete the PROMIS Pain Intensity 3a v2.0 questionnaire.

From approximately Month - 2 to Month 19 (EoS) visit
Change in adolescent participants' pain intensity during the fitusiran treatment period over time
Lasso di tempo: From approximately Month - 2 to Month 19 (EoS) visit

The PROMIS Pediatric Numeric Rating Scale v.1.0 - Pain Intensity 1a consists of one item measuring the average intensity of pain with a recall period of 7 days. The question has ten response options ranging from one ('no pain') to ten ('worst pain').

Adolescent participants (age ≥12 years and <17 years) will self-complete the PROMIS Pediatric Pain Intensity 1a v.1.0.

From approximately Month - 2 to Month 19 (EoS) visit
Change in participants' physical functioning and physical activity during the fitusiran treatment period (via the International Physical Activity Questionnaire [IPAQ]) over time
Lasso di tempo: From approximately Month - 2 to Month 19 (EoS) visit

Participants' physical functioning and physical activity data during the fitusiran treatment period will be collected via the International Physical Activity Questionnaire and reported

From approximately Month - 2 to Month 19 (EoS) visit
Change in participants' joint health (via the Hemophilia Joint Health Score [HJHS]) during the fitusiran treatment period over time
Lasso di tempo: From approximately Month - 2 to Month 19 (EoS) visit

HJHS during the fitusiran treatment period will be reported

From approximately Month - 2 to Month 19 (EoS) visit
Annualized Bleeding Rate (ABR) while receiving fitusiran prophylaxis
Lasso di tempo: From Month 4 up to Month 18 (14-month extension period)

The frequency of treated bleeding episodes will be reported

From Month 4 up to Month 18 (14-month extension period)

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Investigatori

  • Direttore dello studio: Clinical Sciences & Operations, Sanofi

Pubblicazioni e link utili

La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Effettivo)

1 marzo 2024

Completamento primario (Stimato)

28 maggio 2028

Completamento dello studio (Stimato)

30 gennaio 2030

Date di iscrizione allo studio

Primo inviato

17 novembre 2023

Primo inviato che soddisfa i criteri di controllo qualità

17 novembre 2023

Primo Inserito (Effettivo)

24 novembre 2023

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

23 settembre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

18 settembre 2026

Ultimo verificato

1 settembre 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • SFY17741
  • 2022-502414-84 (Identificatore di registro: CTIS)
  • U1111-1280-7227 (Identificatore di registro: ICTRP)

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

SÌ

Descrizione del piano IPD

Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

Sì

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .