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En undersøgelse for at teste en medicin (Fitusiran) til forebyggelse af blødninger hos mennesker med svær hæmofili, der tidligere har modtaget forebyggende behandling med Emicizumab

18. september 2026 opdateret af: Sanofi

Et åbent, enkeltarmsbehandlingsstudie for at undersøge sikkerheden og tolerabiliteten ved at skifte fra Emicizumab til Fitusiran-profylakse hos mandlige deltagere i alderen ≥18 år med svær hæmofili A, med eller uden inhibitorer

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.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

20

Fase

  • Fase 4

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

  • Navn: Trial Transparency email recommended (Toll free for US & Canada)
  • Telefonnummer: option 6 800-633-1610
  • E-mail: Contact-US@sanofi.com

Studiesteder

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

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

12 år og ældre (Barn, Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Han

Beskrivelse

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.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: 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

Andre navne:
  • 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

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Number of participants with Adverse events (AEs) during the fitusiran treatment
Tidsramme: 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

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
The peak thrombin generation (TG) - pre fitusiran treatment
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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)
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Studieleder: Clinical Sciences & Operations, Sanofi

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. marts 2024

Primær færdiggørelse (Anslået)

28. maj 2028

Studieafslutning (Anslået)

30. januar 2030

Datoer for studieregistrering

Først indsendt

17. november 2023

Først indsendt, der opfyldte QC-kriterier

17. november 2023

Først opslået (Faktiske)

24. november 2023

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

23. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

18. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • SFY17741
  • 2022-502414-84 (Registry Identifier: CTIS)
  • U1111-1280-7227 (Registry Identifier: ICTRP)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

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

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .