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An Open-label Study of NNZ-2591 in Pediatric Participants With Phelan-McDermid Syndrome

20. května 2026 aktualizováno: Neuren Pharmaceuticals Limited

A Phase 3 Open-label Extension Study to Investigate the Long-term Safety and Efficacy of Orally Administered NNZ-2591 in Pediatric Participants With Phelan-McDermid Syndrome

This Phase 3, open-label extension, multicenter study will evaluate long-term safety, tolerability and efficacy of NNZ-2591 in pediatric participants with Phelan- McDermid Syndrome.

Přehled studie

Postavení

Nábor

Podmínky

Intervence / Léčba

Detailní popis

After providing informed consent/assent, pediatric participants with Phelan-McDermid syndrome who participated in previous studies (NEU-2591-PMS-301 and NEU-2591-PMS-001) will undergo assessments for eligibility, baseline characteristics and symptom severity. Once eligibility is confirmed, participants will receive orally administered NNZ-2591 during the 52-week Treatment Period. A 2-week safety follow-up period will occur immediately after the completion of the Treatment Period.

Typ studie

Intervenční

Zápis (Odhadovaný)

180

Fáze

  • Fáze 3

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

Studijní kontakt

Studijní místa

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

  • Dítě

Přijímá zdravé dobrovolníky

Ne

Popis

Inclusion Criteria:

  1. Male or female pediatric participants with Phelan-McDermid syndrome ages 3 to 12 years (inclusive) at the time of signing the informed consent for the antecedent study.
  2. Participant must have completed all applicable study visits for the antecedent study in which they participated.
  3. Body weight ≥ 10 kg at Screening/Baseline.
  4. Participants with a PMSA-S overall score ≥ 3 at the Screening and Baseline visits.
  5. Not actively undergoing regression or loss of skills.

Exclusion Criteria:

  1. Use of exclusionary medication or unstable treatment regimens of acceptable concomitant medications as required by the protocol.
  2. Participants with seizures must be controlled on no more than 2 anticonvulsant medications (not counting rescue medications).
  3. Psychotropic medications or any other medication used for a chronic illness (not including antibiotics, pain relievers, anti-diarrheals, and laxatives) with doses and dosing regimen that have not been stable for at least 4 weeks before Screening. If the treatment was discontinued, the discontinuation must have occurred no fewer than 2 weeks before the start of Screening.
  4. Any intercurrent seizures in the past 6 months and /or more than 1 seizure in the past 12 months. •A single febrile seizure in the 6 months prior to screening is allowable if no rescue medication was required.
  5. Abnormal liver function laboratory results during the Screening period, as defined by the protocol
  6. Abnormal QT interval on Screening ECG as defined by the protocol.

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Primární účel: Léčba
  • Přidělení: N/A
  • Intervenční model: Přiřazení jedné skupiny
  • Maskování: Žádné (otevřený štítek)

Zbraně a zásahy

Skupina účastníků / Arm
Intervence / Léčba
Experimentální: NNZ-2591 Arm
The total duration of this study for each participant will be up to up to 56 weeks.
Lék: NNZ-2591
Studijní léčivo bude podáváno dvakrát denně perorálně.

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Long-term safety and tolerability of NNZ-2591 as assessed by the incidence of adverse events across participants
Časové okno: Baseline through Safety Follow-Up (Month 12)
Incidence of TEAEs, AESI and SAEs across participants
Baseline through Safety Follow-Up (Month 12)
Long-term safety and tolerability of NNZ-2591 as assessed by changes from Baseline assessments of ECG parameters events across participants.
Časové okno: Baseline through Month 12
Change from Baseline in ECG Heart Rate (bpm)
Baseline through Month 12
Long-term safety and tolerability of NNZ-2591 as assessed by changes from Baseline assessments of ECG parameters events across participants.
Časové okno: Baseline through Safety Follow-Up (Month 12)
Change from Baseline PR Interval (ms QRS interval (ms)
Baseline through Safety Follow-Up (Month 12)
Long-term safety and tolerability of NNZ-2591 as assessed by changes from Baseline assessments of ECG parameters events across participants.
Časové okno: Baseline through Safety Follow-Up (Month 12)
Change from Baseline in QT interval (ms)
Baseline through Safety Follow-Up (Month 12)
Long-term safety and tolerability of NNZ-2591 as assessed by changes from Baseline assessments of ECG parameters events across participants.
Časové okno: Baseline through Safety Follow-Up (Month 12)
Change from Baseline in QTcB interval (ms)
Baseline through Safety Follow-Up (Month 12)
Long-term safety and tolerability of NNZ-2591 as assessed by changes from Baseline assessments of ECG parameters events across participants.
Časové okno: Baseline through Safety Follow-Up (Month 12)
Change from Baseline in QTcF interval (ms)
Baseline through Safety Follow-Up (Month 12)
Long-term safety and tolerability of NNZ-2591 as assessed by changes from Baseline assessments of ECG parameters events across participants.
Časové okno: Baseline through Safety Follow-Up (Month 12)
Change from Baseline in RR interval (ms)
Baseline through Safety Follow-Up (Month 12)
Long-term safety and tolerability of NNZ-2591 as assessed by changes from Baseline assessments of vital sign parameters events across participants.
Časové okno: Baseline through Month 12
Change from Baseline for heart rate (bpm)
Baseline through Month 12
Long-term safety and tolerability of NNZ-2591 as assessed by changes from Baseline assessments of vital sign parameters events across participants.
Časové okno: Baseline through Month 12
Change from Baseline for respiration rate (breaths per minute)
Baseline through Month 12
Long-term safety and tolerability of NNZ-2591 as assessed by changes from Baseline assessments of vital sign parameters events across participants.
Časové okno: Baseline through Month 12
Change from Baseline for Temperature (Celsius)
Baseline through Month 12
Long-term safety and tolerability of NNZ-2591 as assessed by changes from Baseline assessments of vital sign parameters events across participants.
Časové okno: Baseline through Month 12
Change from Baseline for Diastolic Blood Pressure (mm Hg)
Baseline through Month 12
Long-term safety and tolerability of NNZ-2591 as assessed by changes from Baseline assessments of vital sign parameters events across participants.
Časové okno: Baseline through Month 12
Change from Baseline for Systolic Blood Pressure (mm Hg)
Baseline through Month 12
Long-term safety and tolerability of NNZ-2591 as incidence of abnormal, clinically significant clinical laboratory parameters events across participants.
Časové okno: Baseline through Month 12
Incidence of abnormal and clinically significant laboratory parameters
Baseline through Month 12
Long-term safety and tolerability of NNZ-2591 as incidence of abnormal, clinically significant physical examination findings across participants.
Časové okno: Baseline through Month 12
Incidence of abnormal, clinically significant physical examination findings
Baseline through Month 12

Sekundární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Efficacy of NNZ-2591 as measured by the Phelan-McDermid Syndrome Assessment of Change (PMSA-C) overall score
Časové okno: Months 3 and 12
Efficacy of NNZ-2591 as measured by the Phelan-McDermid Syndrome Assessment of Change (PMSA-C) overall score. The PMSA-C scores range from 1 to 7 with 1 indicating very much improved and 7 indicating very much worse.
Months 3 and 12
Efficacy of NNZ-2591 as measured by the change from baseline in the Vineland Adaptive Behavior Scales-3, Interview version (Vineland-3) receptive communication subdomain raw score.
Časové okno: Months 3 and 12
Efficacy of NNZ-2591 as measured by the change from baseline in the Vineland Adaptive Behavior Scales-3, Interview version (Vineland-3) receptive communication subdomain raw score. A higher raw score for the receptive communication subdomain indicates better adaptive behavior.
Months 3 and 12
Efficacy of NNZ-2591 as measured by the Phelan-McDermid Syndrome Assessment of Change (PMSA-C) domain scores.
Časové okno: Months 3 and 12
Efficacy of NNZ-2591 as measured by the Phelan-McDermid Syndrome Assessment of Change (PMSA-C) domain scores. The PMSA-C domain scores range from 1 to 7 with 1 indicating very much improved and 7 indicating very much worse.
Months 3 and 12
Efficacy of NNZ-2591 as measured by the Caregiver Impression of Change (CIC) domain scores.
Časové okno: Months 3 and 12
Efficacy of NNZ-2591 as measured by the Caregiver Impression of Change (CIC) domain scores. The CIC scores range from 1 to 7 with 1 indicating very much improved and 7 indicating very much worse.
Months 3 and 12
Efficacy of NNZ-2591 as measured by the change from baseline in Phelan-McDermid Syndrome Assessment of Severity (PMSA-S) domain scores.
Časové okno: Months 3 and 12
Efficacy of NNZ-2591 as measured by the change from baseline in Phelan-McDermid Syndrome Assessment of Severity (PMSA-S) domain scores. The PMSA-S scores range from 1 to 7 with 1 indicating typical for age, not at all impaired and 7 among the most severely impaired.
Months 3 and 12
Efficacy of NNZ-2591 as measured by the change from baseline in Phelan-McDermid Syndrome Assessment of Severity (PMSA-S) overall score.
Časové okno: Months 3 and 12
Efficacy of NNZ-2591 as measured by the change from baseline in Phelan-McDermid Syndrome Assessment of Severity (PMSA-S) overall score. The PMSA-S scores range from 1 to 7 with 1 indicating typical for age, not at all impaired and 7 among the most severely impaired.
Months 3 and 12
Efficacy of NNZ-2591 as measured by the change from baseline in PMS Clinician Domain Specific Rating Scale (PMS-DSRS) scores.
Časové okno: Months 3 and 12
Efficacy of NNZ-2591 as measured by the change from baseline in PMS Clinician Domain Specific Rating Scale (PMS-DSRS) scores. The PMS-DSRS scores range from 0 to 4 with 0 indicating Symptom Not Present and 4 indicating Very Severe.
Months 3 and 12

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

Neuren Pharmaceuticals Limited

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia (Odhadovaný)

20. května 2026

Primární dokončení (Odhadovaný)

29. října 2028

Dokončení studie (Odhadovaný)

12. listopadu 2028

Termíny zápisu do studia

První předloženo

24. března 2026

První předloženo, které splnilo kritéria kontroly kvality

13. května 2026

První zveřejněno (Aktuální)

18. května 2026

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

22. května 2026

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

20. května 2026

Naposledy ověřeno

1. května 2026

Více informací

Termíny související s touto studií

Klíčová slova

Další relevantní podmínky MeSH

Další identifikační čísla studie

  • NEU-2591-PMS-302

Plán pro data jednotlivých účastníků (IPD)

Plánujete sdílet data jednotlivých účastníků (IPD)?

NE

Informace o lécích a zařízeních, studijní dokumenty

Studuje lékový produkt regulovaný americkým FDA

Ano

Studuje produkt zařízení regulovaný americkým úřadem FDA

Ne

Tyto informace byly beze změn načteny přímo z webu clinicaltrials.gov. Máte-li jakékoli požadavky na změnu, odstranění nebo aktualizaci podrobností studie, kontaktujte prosím register@clinicaltrials.gov. Jakmile bude změna implementována na clinicaltrials.gov, bude automaticky aktualizována i na našem webu .

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Klinické studie na NNZ-2591

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Podmínky

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