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Badanie fazy 3 chlorowodorku fenfluraminy w zespole Retta

30 października 2026 zaktualizowane przez: UCB BIOSCIENCES, Inc.

Randomizowane, podwójnie ślepa próba, kontrolowana placebo, wieloośrodkowe badanie fazy 3 z otwartym rozszerzeniem, oceniające skuteczność i bezpieczeństwo chlorowodorku fenfluraminy u uczestników badania z zespołem Retta

The purpose of this study is to investigate the efficacy of fenfluramine hydrochloride (HCl) versus placebo in study participants with Rett syndrome (RTT).

Przegląd badań

Status

Rekrutacyjny

Warunki

Interwencja / Leczenie

Typ studiów

Interwencyjne

Zapisy (Szacowany)

200

Faza

  • Faza 3

Kontakty i lokalizacje

Ta sekcja zawiera dane kontaktowe osób prowadzących badanie oraz informacje o tym, gdzie badanie jest przeprowadzane.

Kontakt w sprawie studiów

Kopia zapasowa kontaktu do badania

Lokalizacje studiów

      • Brussels, Belgia
        • Rekrutacyjny
        • Ep0247 11001
      • Edegem, Belgia
        • Rekrutacyjny
        • Ep0247 11002
      • Brest, Francja
        • Rekrutacyjny
        • Ep0247 12005
      • Bron, Francja
        • Rekrutacyjny
        • Ep0247 12003
      • Marseille, Francja
        • Rekrutacyjny
        • Ep0247 12004
      • Paris, Francja
        • Rekrutacyjny
        • Ep0247 12006
      • Paris, Francja
        • Rekrutacyjny
        • Ep0247 12001
      • Tbilisi, Gruzja
        • Rekrutacyjny
        • Ep0247 13001
      • Tbilisi, Gruzja
        • Rekrutacyjny
        • Ep0247 13002
      • Madrid, Hiszpania
        • Rekrutacyjny
        • Ep0247 11105
      • Madrid, Hiszpania
        • Rekrutacyjny
        • Ep0247 11101
      • Málaga, Hiszpania
        • Rekrutacyjny
        • Ep0247 11103
      • Seville, Hiszpania
        • Rekrutacyjny
        • Ep0247 11102
      • Ramat Gan, Izrael
        • Rekrutacyjny
        • Ep0247 16001
      • Chiyoda-ku, Japonia
        • Rekrutacyjny
        • Ep0247 43005
      • Kodaira, Japonia
        • Rekrutacyjny
        • Ep0247 43004
      • Kurume, Japonia
        • Rekrutacyjny
        • Ep0247 43001
      • Musashimurayama-shi, Japonia
        • Rekrutacyjny
        • Ep0247 43006
      • Osaka, Japonia
        • Rekrutacyjny
        • Ep0247 43002
      • Setagaya-ku, Japonia
        • Rekrutacyjny
        • Ep0247 43003
      • Vogtareuth, Niemcy
        • Rekrutacyjny
        • Ep0247 14001
      • Gdansk, Polska
        • Rekrutacyjny
        • Ep0247 19003
      • Krakow, Polska
        • Rekrutacyjny
        • Ep0247 19002
    • Arkansas
      • Little Rock, Arkansas, Stany Zjednoczone, 72202
        • Rekrutacyjny
        • Ep0247 21010
    • Florida
      • Miami, Florida, Stany Zjednoczone, 33155
        • Rekrutacyjny
        • Ep0247 21009
      • Orlando, Florida, Stany Zjednoczone, 32806
        • Rekrutacyjny
        • Ep0247 21011
    • Georgia
      • Atlanta, Georgia, Stany Zjednoczone, 30322
        • Rekrutacyjny
        • Ep0247 21007
    • Pennsylvania
      • Philadelphia, Pennsylvania, Stany Zjednoczone, 19104-4318
        • Rekrutacyjny
        • Ep0247 21003
    • Texas
      • Houston, Texas, Stany Zjednoczone, 77030
        • Rekrutacyjny
        • Ep0247 21005
      • Irving, Texas, Stany Zjednoczone, 75062
        • Rekrutacyjny
        • Ep0247 21013
    • Washington
      • Seattle, Washington, Stany Zjednoczone, 98105
        • Rekrutacyjny
        • Ep0247 21004
      • Budapest, Węgry
        • Rekrutacyjny
        • Ep0247 15001
      • Debrecen, Węgry
        • Rekrutacyjny
        • Ep0247 15002
      • Genova, Włochy
        • Rekrutacyjny
        • Ep0247 17003
      • Milan, Włochy
        • Rekrutacyjny
        • Ep0247 17001
      • Naples, Włochy
        • Rekrutacyjny
        • Ep0247 17008
      • Pisa, Włochy
        • Rekrutacyjny
        • Ep0247 17002
      • Troina, Włochy
        • Rekrutacyjny
        • Ep0247 17006
      • Manchester, Zjednoczone Królestwo
        • Rekrutacyjny
        • Ep0247 11303
      • Nottingham, Zjednoczone Królestwo
        • Rekrutacyjny
        • Ep0247 11304

Kryteria uczestnictwa

Badacze szukają osób, które pasują do określonego opisu, zwanego kryteriami kwalifikacyjnymi. Niektóre przykłady tych kryteriów to ogólny stan zdrowia danej osoby lub wcześniejsze leczenie.

Kryteria kwalifikacji

Wiek uprawniający do nauki

5 lat do 35 lat (Dziecko, Dorosły)

Akceptuje zdrowych ochotników

Nie

Płeć kwalifikująca się do nauki

Wszystko

Opis

Inclusion Criteria:

  • Participant has typical or classic Rett Syndrome (RTT) according to the RettSearch Consortium 2010 revised criteria
  • Participant has a documented disease-causing mutation or deletion in the methyl-CpG-binding protein 2 (MECP2) gene
  • Participant meets criteria for postregression for at least 6 months prior to Screening, defined as:
  • No loss or degradation of ambulation (including gait, coordination, or independence of walking/standing);
  • No loss or degradation of hand function; no loss or degradation of speech (including babbling, words, or previously developed communicative vocalizations);
  • No loss or degradation of nonverbal communicative or social skills (including eye gaze, using body to indicate communicative intent, or social attentiveness)
  • Participant has an Rett Syndrome Clinical Severity Scale (RTT-CSS) rating of 10 to 36 (inclusive)
  • Participant has a Clinical Global Impression-Severity (CGIS) score of ≥4
  • Participant has a legal representative capable of providing signed informed consent on behalf of the participant as described in the protocol, which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in the protocol.
  • Participant is aged 5 to 35 years of age (inclusive) at the time of first administration of investigational intervention.
  • Male or female.
  • Participant has a consistent caregiver who is ≥18 years of age at the Screening Visit. The caregiver needs to be able to complete the caregiver assessments defined for the entire study. Every attempt should be made to have the same evaluator complete the assessments for the duration of the study.

Exclusion Criteria:

  • Participant has a history of lymphoma, leukemia, or any malignancy within the past 5 years except for basal cell or squamous epithelial carcinomas of the skin that have been resected with no evidence of metastatic disease for 3 years.

  • Participant has clinically significant abnormality in vital signs according to the Investigator

  • Participant has an exclusionary cardiovascular or cardiopulmonary abnormality based on echocardiogram (ECHO), electrocardiogram (ECG), or physical examination, and is not approved for entry by the central cardiac reader. Exclusionary abnormalities include, but are not limited to:

    1. Greater than trace aortic valve regurgitation.
    2. Greater than mild mitral valve regurgitation.
    3. Possible signs of pulmonary arterial hypertension (PAH) with abnormal pulmonary artery systolic pressure (PASP) or PASP ≥35 mmHg.
    4. Evidence of left ventricular dysfunction (systolic or diastolic).
    5. Clinically significant structural cardiac abnormality, including but not limited to mitral valve prolapse, atrial or ventricular septal defects, or patent ductus arteriosus with reversal of shunt (right to left shunt). Note: Patent foramen ovale without a reversal of shunt or a bicuspid aortic valve is not considered exclusionary
  • Participant has a clinically significant medical condition, including chronic obstructive pulmonary disease, interstitial lung disease, portal hypertension, or need for invasive mechanical ventilation (eg, via tracheostomy), or has had clinically relevant symptoms or a clinically significant illness currently or in the 4 weeks prior to the Screening Visit that would negatively impact study participation, collection of study data, or pose a risk to the participant

  • Participant is taking >4 concomitant antiseizure medications (ASMs). Rescue medications are not included in the count

Plan studiów

Ta sekcja zawiera szczegółowe informacje na temat planu badania, w tym sposób zaprojektowania badania i jego pomiary.

Jak projektuje się badanie?

Szczegóły projektu

  • Główny cel: Leczenie
  • Przydział: Randomizowane
  • Model interwencyjny: Przydział równoległy
  • Maskowanie: Potroić

Broń i interwencje

Grupa uczestników / Arm
Interwencja / Leczenie
Eksperymentalny: fenfluramine hydrochloride

Participants will receive fenfluramine hydrochloride for 14 weeks in a double-blind period (including titration and maintenance), followed by a 2-week double-blind transition period. This is followed by a 52-week open-label treatment period. Participants may continue treatment until alternative access is available. Those who discontinue without continued access will undergo an 8-day taper and a 26-week follow-up.

Oral solution

Inne nazwy:
  • Fintepla, ZX008
Komparator placebo: Placebo

Participants will receive a matching placebo for 14 weeks in a double-blind period (including titration and maintenance). After this period, they transition into a 2-week double-blind period with fenfluramine hydrochloride, followed by a 52-week open-label treatment period. Participants may continue treatment until alternative access is available. Those who discontinue without continued access will undergo an 8-day taper and a 26-week follow-up.

Oral solution

Co mierzy badanie?

Podstawowe miary wyniku

Miara wyniku
Opis środka
Ramy czasowe
Change from Baseline to Week 14 in Rett Syndrome Behaviour Questionnaire (RSBQ) Total Score
Ramy czasowe: From Baseline (Day 1) to Week 14

The RSBQ is a caregiver-completed, instrument assessing behavioral and emotional features in RTT. The RSBQ consists of 45 items, including 8 subscales: General mood (8 items); Breathing problems (5 items); Hand behavior (6 items); Face movements (4 items); Body rocking and expressionless face (6 items); Nighttime behaviors (3 items); Fear/anxiety (4 items); and Walking/standing (2 items). Caregivers are asked to evaluate each RTT feature based on the current status of the patients on a 3-point scale as 0 ("not true"), 1 ("somewhat or sometimes true"), or 2 ("often true"), with the total score ranging from 0 to 90. Higher scores indicate increased disease severity. Seven items that do not belong under any of the subscales are classed as "uncategorized" but contribute to the overall total score.

From Baseline (Day 1) to Week 14
Clinical Global Impression of Change (CGIC) Score at Week 14
Ramy czasowe: At Week 14

The CGIC is a clinician-rated single item evaluating the degree of improvement or worsening of a participant's condition from Baseline following treatment or intervention. The CGIC uses a 7-point response scale, with the following ratings: "1: Very Much improved", "2: Much improved", "3: Minimally improved", "4: No change", "5: Minimally worse", "6: Much worse", "7: Very Much Worse".

At Week 14

Miary wyników drugorzędnych

Miara wyniku
Opis środka
Ramy czasowe
Change from Baseline to Week 14 in Patient-Reported Outcomes Measurement Information System-Sleep Disturbance (PROMIS-SD) score
Ramy czasowe: From Baseline (Day 1) to Week 14

Sleep disturbances will be assessed by the PROMIS-SD parent proxy 8a version. Caregivers are asked to rate 8 items over the past 7 days on a 5-point scale: "1: Never", "2: Almost never", "3: Sometimes", "4: Almost always", and "5: Always", with higher scores indicating more severe sleep disturbances.

From Baseline (Day 1) to Week 14
Change from Baseline to Week 14 in Observer-Reported Communication Ability (ORCA) score
Ramy czasowe: From Baseline (Day 1) to Week 14

The ORCA is an 84-item, observer-reported measure of communication ability over the past 30 days. The majority of the items included in the ORCA measure have 3 response options: "No or only once," "Sometimes," and "Yes, almost all the time", which enable derivation of an overall communication score and scores for each form of communication (expressive, receptive, and pragmatic), with higher scores indicating greater communication ability.

From Baseline (Day 1) to Week 14
Caregiver Global Impression of Change - Seizure (CaGIC-Seizure) score at Week 14
Ramy czasowe: At Week 14

The CaGIC-Seizure is a caregiver-reported item assessing the change from Baseline in the participant's seizure status. The CaGIC-Seizure uses a 7-point response scale, with the following ratings: "1: Very Much improved", "2: Much improved", "3: Minimally improved", "4: No change", "5: Minimally worse", "6: Much worse", "7: Very Much Worse".

At Week 14
Incidence of treatment-emergent adverse events (TEAEs) during the double-blind intervention period
Ramy czasowe: From Baseline (Day 1) up to Week 14

An AE is any untoward medical occurrence in a clinical study participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Treatment emergent adverse events (TEAEs) are adverse events that are not present prior to the pharmaceutical product administration or an already present event that worsens either in intensity or frequency.

From Baseline (Day 1) up to Week 14
Incidence of serious TEAEs during the double-blind intervention period
Ramy czasowe: From Baseline (Day 1) up to Week 14

An SAE is defined as any untoward medical occurrence that, at any dose, meets 1 or more of the criteria listed:

  • Results in death
  • Is life-threatening
  • Requires inpatient hospitalization or prolongation of existing hospitalization
  • Results in persistent or significant disability/incapacity
  • Is a congenital anomaly/birth defect
  • Other important medical events which based on medical or scientific judgement may jeopardize the patients or may require medical or surgical intervention to prevent any of the above.
From Baseline (Day 1) up to Week 14
Incidence of TEAEs leading to discontinuation during the double-blind intervention period
Ramy czasowe: From Baseline (Day 1) up to Week 14

An AE is any untoward medical occurrence in a clinical study participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Treatment emergent adverse events (TEAEs) are adverse events that are not present prior to the pharmaceutical product administration or an already present event that worsens either in intensity or frequency. TEAEs leading to discontinuation will be reported.

From Baseline (Day 1) up to Week 14
Incidence of related TEAEs during the double-blind intervention period
Ramy czasowe: From Baseline (Day 1) up to Week 14

An AE is any untoward medical occurrence in a clinical study participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Treatment emergent adverse events (TEAEs) are adverse events that are not present prior to the pharmaceutical product administration or an already present event that worsens either in intensity or frequency. Related TEAEs will be reported.

From Baseline (Day 1) up to Week 14
Change from Baseline in QT interval corrected using Fridericia's formula (QTcF) interval on 12-lead ECG by visit during the double-blind intervention period
Ramy czasowe: From Baseline (Day 1) up to Week 14

Change from Baseline in QTcF interval as measured by 12-lead ECG up to Week 14 by visit will be reported

From Baseline (Day 1) up to Week 14
Incidence of treatment-emergent Doppler Echocardiogram (ECHO) results meeting the Food and Drug Administration (FDA) case definition of drug-associated valvular heart disease (VHD) during the double-blind intervention period
Ramy czasowe: From Baseline (Day 1) up to Week 14

The FDA case definition of drug-associated VHD is aortic regurgitation ≥mild and/or mitral regurgitation ≥moderate with restricted valve motion, valve thickening, and/or physical signs or symptoms attributable to valve diseases. ECHO readings related to VHD on any of the 4 valves (aortic, mitral, pulmonary, tricuspid) will be reported with grades of absent, trace, mild, moderate, or severe.

From Baseline (Day 1) up to Week 14
Incidence of treatment-emergent Doppler ECHO results meeting the FDA case definition of PAH (defined as a PASP >35mmHg) during the double-blind intervention period
Ramy czasowe: From Baseline (Day 1) up to Week 14

ECHO readings related to pulmonary arterial hypertenstion (PAH) will be reported based on Pulmonary artery systolic pressure (PASP).

From Baseline (Day 1) up to Week 14
Incidence of treatment-emergent adverse events (TEAEs) from baseline to end of safety follow up
Ramy czasowe: From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)

An AE is any untoward medical occurrence in a clinical study participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Treatment emergent adverse events (TEAEs) are adverse events that are not present prior to the pharmaceutical product administration or an already present event that worsens either in intensity or frequency.

From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)
Incidence of serious TEAEs from baseline to end of safety follow up
Ramy czasowe: From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)

An SAE is defined as any untoward medical occurrence that, at any dose, meets 1 or more of the criteria listed:

  • Results in death
  • Is life-threatening
  • Requires inpatient hospitalization or prolongation of existing hospitalization
  • Results in persistent or significant disability/incapacity
  • Is a congenital anomaly/birth defect
  • Other important medical events which based on medical or scientific judgement may jeopardize the patients or may require medical or surgical intervention to prevent any of the above.
From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)
Incidence of TEAEs leading to discontinuation from baseline to end of safety follow up
Ramy czasowe: From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)

An AE is any untoward medical occurrence in a clinical study participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Treatment emergent adverse events (TEAEs) are adverse events that are not present prior to the pharmaceutical product administration or an already present event that worsens either in intensity or frequency. TEAEs leading to discontinuation will be reported.

From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)
Incidence of related TEAEs from baseline to end of safety follow up
Ramy czasowe: From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)

An AE is any untoward medical occurrence in a clinical study participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Treatment emergent adverse events (TEAEs) are adverse events that are not present prior to the pharmaceutical product administration or an already present event that worsens either in intensity or frequency. Related TEAEs will be reported.

From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)
Change from Baseline in QT interval corrected using Fridericia's formula (QTcF) interval on 12-lead ECG by visit from baseline to end of safety follow up
Ramy czasowe: From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)

Change from Baseline in QTcF interval as measured by 12-lead ECG up to Week 98 by visit will be reported

From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)
Incidence of treatment-emergent Doppler Echocardiogram (ECHO) results meeting the Food and Drug Administration (FDA) case definition of drug-associated valvular heart disease (VHD) from baseline to end of safety follow up
Ramy czasowe: From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)

The FDA case definition of drug-associated VHD is aortic regurgitation ≥mild and/or mitral regurgitation ≥moderate with restricted valve motion, valve thickening, and/or physical signs or symptoms attributable to valve diseases. ECHO readings related to VHD on any of the 4 valves (aortic, mitral, pulmonary, tricuspid) will be reported with grades of absent, trace, mild, moderate, or severe.

From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)
Incidence of treatment-emergent Doppler ECHO results meeting the FDA case definition of PAH (defined as a PASP >35mmHg) from baseline to end of safety follow up
Ramy czasowe: From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)

ECHO readings related to pulmonary arterial hypertenstion (PAH) will be reported based on Pulmonary artery systolic pressure (PASP).

From Baseline (Day1) to the End of Safety Follow Up (up to 3 years and 10 months)

Współpracownicy i badacze

Tutaj znajdziesz osoby i organizacje zaangażowane w to badanie.

Sponsor

Śledczy

  • Dyrektor Studium: UCB Cares, 0018445992273

Daty zapisu na studia

Daty te śledzą postęp w przesyłaniu rekordów badań i podsumowań wyników do ClinicalTrials.gov. Zapisy badań i zgłoszone wyniki są przeglądane przez National Library of Medicine (NLM), aby upewnić się, że spełniają określone standardy kontroli jakości, zanim zostaną opublikowane na publicznej stronie internetowej.

Główne daty studiów

Rozpoczęcie studiów (Rzeczywisty)

14 lipca 2026

Zakończenie podstawowe (Szacowany)

6 lutego 2029

Ukończenie studiów (Szacowany)

29 sierpnia 2031

Daty rejestracji na studia

Pierwszy przesłany

25 marca 2026

Pierwszy przesłany, który spełnia kryteria kontroli jakości

25 marca 2026

Pierwszy wysłany (Rzeczywisty)

31 marca 2026

Aktualizacje rekordów badań

Ostatnia wysłana aktualizacja (Rzeczywisty)

2 listopada 2026

Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości

30 października 2026

Ostatnia weryfikacja

1 października 2026

Więcej informacji

Terminy związane z tym badaniem

Słowa kluczowe

Inne numery identyfikacyjne badania

  • EP0247
  • 2025-523157-34 (Inny identyfikator: EU CTR)
  • 2025 (Grant/umowa NIH USA)

Plan dla danych uczestnika indywidualnego (IPD)

Planujesz udostępniać dane poszczególnych uczestników (IPD)?

TAK

Opis planu IPD

Data from this trial may be requested by qualified researchers six months after product approval in the US and/or Europe, or global development is discontinued, and 18 months after trial completion. Investigators may request access to anonymized individual patient-level data and redacted trial documents which may include: analysis-ready datasets, study protocol, annotated case report form, statistical analysis plan, dataset specifications, and clinical study report. Prior to use of the data, proposals need to be approved by an independent review panel at www.Vivli.org and a signed data sharing agreement will need to be executed. All documents are available in English only, for a pre-specified time, typically 12 months, on a password protected portal. This plan may change if the risk of re-identifying trial participants is determined to be too high after the trial is completed; in this case and to protect participants, individual patient-level data would not be made available.

Ramy czasowe udostępniania IPD

Data from this trial may be requested by qualified researchers six months after product approval in the US and/or Europe or global development is discontinued, and 18 months after trial completion.

Kryteria dostępu do udostępniania IPD

Qualified researchers may request access to anonymized IPD and redacted study documents which may include: raw datasets, analysis-ready datasets, study protocol, blank case report form, annotated case report form, statistical analysis plan, dataset specifications, and clinical study report. Prior to use of the data, proposals need to be approved by an independent review panel at www.Vivli.org and a signed data sharing agreement will need to be executed. All documents are available in English only, for a pre-specified time, typically 12 months, on a password protected portal.

Typ informacji pomocniczych dotyczących udostępniania IPD

  • PROTOKÓŁ BADANIA
  • SOK ROŚLINNY
  • CSR

Informacje o lekach i urządzeniach, dokumenty badawcze

Bada produkt leczniczy regulowany przez amerykańską FDA

Tak

Bada produkt urządzenia regulowany przez amerykańską FDA

Nie

Te informacje zostały pobrane bezpośrednio ze strony internetowej clinicaltrials.gov bez żadnych zmian. Jeśli chcesz zmienić, usunąć lub zaktualizować dane swojego badania, skontaktuj się z register@clinicaltrials.gov. Gdy tylko zmiana zostanie wprowadzona na stronie clinicaltrials.gov, zostanie ona automatycznie zaktualizowana również na naszej stronie internetowej .