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Een onderzoek om een ​​geneesmiddel (Fitusiran) te testen ter voorkoming van bloedingen bij mensen met ernstige hemofilie die eerder een preventieve behandeling met Emicizumab kregen

18 september 2026 bijgewerkt door: Sanofi

Een open-label, eenarmig behandelonderzoek om de veiligheid en verdraagbaarheid te onderzoeken van het overstappen van Emicizumab naar Fitusiran-profylaxe bij mannelijke deelnemers van 18 jaar of ouder met ernstige hemofilie A, met of zonder remmers

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.

Studie Overzicht

Toestand

Werving

Conditie

Interventie / Behandeling

Studietype

Ingrijpend

Inschrijving (Geschat)

20

Fase

  • Fase 4

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

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

Studie Locaties

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

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

12 jaar en ouder (Kind, Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Mannelijk

Beschrijving

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.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: NVT
  • Interventioneel model: Opdracht voor een enkele groep
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: 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.
Geneesmiddel: Fitusiran (SAR439774)

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

Andere namen:
  • SAR439774, Qfitlia®
Biologisch: Clotting factor concentrates (CFC) or bypassing agents (BPA)

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

Biologisch: Antithrombin concentrate (ATIIIC)

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

Biologisch: Emicizumab

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

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Number of participants with Adverse events (AEs) during the fitusiran treatment
Tijdsspanne: 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

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
The peak thrombin generation (TG) - pre fitusiran treatment
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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)
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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)

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Sanofi

Onderzoekers

  • Studie directeur: Clinical Sciences & Operations, Sanofi

Publicaties en nuttige links

De persoon die verantwoordelijk is voor het invoeren van informatie over het onderzoek stelt deze publicaties vrijwillig ter beschikking. Dit kan gaan over alles wat met het onderzoek te maken heeft.

Nuttige links

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

1 maart 2024

Primaire voltooiing (Geschat)

28 mei 2028

Studie voltooiing (Geschat)

30 januari 2030

Studieregistratiedata

Eerst ingediend

17 november 2023

Eerst ingediend dat voldeed aan de QC-criteria

17 november 2023

Eerst geplaatst (Werkelijk)

24 november 2023

Updates van studierecords

Laatste update geplaatst (Werkelijk)

23 september 2026

Laatste update ingediend die voldeed aan QC-criteria

18 september 2026

Laatst geverifieerd

1 september 2026

Meer informatie

Termen gerelateerd aan deze studie

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • SFY17741
  • 2022-502414-84 (Register-ID: CTIS)
  • U1111-1280-7227 (Register-ID: ICTRP)

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

JA

Beschrijving IPD-plan

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

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Ja

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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