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En studie av NNZ-2591 hos barn og unge med Phelan-McDermid-syndrom

25. september 2026 oppdatert av: Neuren Pharmaceuticals Limited

En fase 3 randomisert, dobbeltblind, placebokontrollert studie for å undersøke effektiviteten og sikkerheten til oralt administrert NNZ-2591 sammenlignet med placebo hos pediatriske deltakere med Phelan-McDermid-syndrom

This Phase 3, randomized, double-blind, parallel-group (2-arm), placebo-controlled, multicenter study will evaluate the efficacy and safety of NNZ-2591 compared to placebo in pediatric participants with Phelan- McDermid Syndrome.

Studieoversikt

Status

Rekruttering

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

After providing informed consent/assent, pediatric participants with Phelan-McDermid syndrome ages 3-12 years of age will enter the 4-week Screening Period and undergo assessments for eligibility, baseline characteristics and symptom severity.

Once eligibility is confirmed, participants will be randomized in a 1:1 ratio to receive either orally administered NNZ-2591 or matching placebo during the 13-week Treatment Period. Subsequently, a 2-week safety follow-up period will occur immediately after the completion of the Treatment Period.

Studietype

Intervensjonell

Registrering (Antatt)

160

Fase

  • Fase 3

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studiesteder

  • Canada
    • Ontario
      • Toronto, Ontario, Canada, M4G 1R8
  • Forente stater
    • Alabama
      • Birmingham, Alabama, Forente stater, 35233
    • California
      • Glendale, California, Forente stater, 91203
      • Palo Alto, California, Forente stater, 94305
      • San Diego, California, Forente stater, 92123
      • San Rafael, California, Forente stater, 94903
    • District of Columbia
      • Washington D.C., District of Columbia, Forente stater, 20010
    • Georgia
      • Atlanta, Georgia, Forente stater, 30322
    • Illinois
      • Chicago, Illinois, Forente stater, 60612
    • Maryland
      • Chevy Chase, Maryland, Forente stater, 20815
    • Massachusetts
      • Brookline, Massachusetts, Forente stater, 02445
      • Lexington, Massachusetts, Forente stater, 02421
    • Michigan
      • Ann Arbor, Michigan, Forente stater, 48109
    • New York
      • New York, New York, Forente stater, 10029
    • Ohio
      • Cincinnati, Ohio, Forente stater, 45229
      • Columbus, Ohio, Forente stater, 43205
    • Texas
      • Houston, Texas, Forente stater, 77030
    • Virginia
      • Charlottesville, Virginia, Forente stater, 22903

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

3 år til 12 år (Barn)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

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.
  2. Clinical diagnosis of Phelan-McDermid syndrome with a documented disease-causing genetic abnormality of SHANK3.
  3. Body weight ≥ 10 kg at Screening.
  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. Current treatment with more than 3 allowable psychotropic medications.
  3. Participants with seizures must be controlled on no more than 2 anticonvulsant medications (not counting rescue medications).
  4. 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.
  5. 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.
  6. Abnormal liver function laboratory results during the Screening period, as defined by the protocol
  7. Abnormal QT interval on Screening ECG as defined by the protocol.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Firemannsrom

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: NNZ-2591 Arm

The total duration of this study for each participant will be up to approximately 17 to 19 weeks.

Participants will be randomized in a 1:1 ratio to receive orally administered NNZ-2591 during the 13-week Treatment Period.
Legemiddel: NNZ-2591

The study drug will be administered twice daily orally.
Placebo komparator: Placebo Arm

The total duration of this study for each participant will be up to approximately 17 to 19 weeks.

Participants will be randomized in a 1:1 ratio to receive orally administered placebo matching NNZ-2591 during the 13-week Treatment Period.
Legemiddel: Placebo

The study drug will be administered twice daily orally.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Efficacy of NNZ-2591 compared with placebo as measured by the Phelan-McDermid Syndrome Assessment of Change (PMSA-C) overall score.
Tidsramme: Week 13

Efficacy of NNZ-2591 compared with placebo 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.
Week 13
Efficacy of NNZ-2591 compared with placebo as measured by the change from baseline in the Vineland Adaptive Behavior Scales-3, Interview version (Vineland-3) receptive communication subdomain raw score.
Tidsramme: Week 13

Efficacy of NNZ-2591 compared with placebo 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.
Week 13

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Efficacy of NNZ-2591 compared with placebo as measured by the Caregiver Impression of Change (CIC) overall score.
Tidsramme: Week 13

Efficacy of NNZ-2591 compared with placebo as measured by the Caregiver Impression of Change (CIC) overall score. The CIC scores range from 1 to 7 with 1 indicating very much improved and 7 indicating very much worse.
Week 13
Efficacy of NNZ-2591 compared with placebo as measured by the Phelan-McDermid Syndrome Assessment of Change (PMSA-C) domain scores.
Tidsramme: Week 13

Efficacy of NNZ-2591 compared with placebo 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.
Week 13
Efficacy of NNZ-2591 compared with placebo as measured by the Caregiver Impression of Change (CIC) domain scores.
Tidsramme: Week 13

Efficacy of NNZ-2591 compared with placebo 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.
Week 13
Efficacy of NNZ-2591 compared with placebo as measured by the change from baseline in Phelan-McDermid Syndrome Assessment of Severity (PMSA-S) domain scores.
Tidsramme: Week 13

Efficacy of NNZ-2591 compared with placebo 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.
Week 13
Efficacy of NNZ-2591 compared with placebo as measured by the change from baseline in PMSA-S overall score.
Tidsramme: Week 13

Efficacy of NNZ-2591 compared with placebo as measured by the change from baseline in 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.
Week 13
Efficacy of NNZ-2591 compared with placebo as measured by the change from baseline in PMS Clinician Domain Specific Rating Scale (PMS-DSRS) scores.
Tidsramme: Week 13

Efficacy of NNZ-2591 compared with placebo 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.
Week 13

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Neuren Pharmaceuticals Limited

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

12. november 2025

Primær fullføring (Antatt)

31. oktober 2027

Studiet fullført (Antatt)

15. november 2027

Datoer for studieregistrering

Først innsendt

13. november 2025

Først innsendt som oppfylte QC-kriteriene

8. desember 2025

Først lagt ut (Faktiske)

15. desember 2025

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

28. september 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

25. september 2026

Sist bekreftet

1. september 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • NEU-2591-PMS-301

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

NEI

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Ja

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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