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

2026年8月10日 更新者：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.

調査の概要

状態

募集

条件

介入・治療

詳細な説明

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.

研究の種類

介入

入学 (推定)

180

段階

  • フェーズ 3

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

研究場所

  • アメリカ
    • California
      • Glendale、California、アメリカ、91203
      • San Rafael、California、アメリカ、94903
    • Maryland
      • Chevy Chase、Maryland、アメリカ、20815
    • Massachusetts
      • Lexington、Massachusetts、アメリカ、02421
    • Ohio
      • Cincinnati、Ohio、アメリカ、02421
    • Texas
      • Houston、Texas、アメリカ、77030

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

  • 子

健康ボランティアの受け入れ

いいえ

説明

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.

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか？

デザインの詳細

  • 主な目的：処理
  • 割り当て：なし
  • 介入モデル：単一グループの割り当て
  • マスキング：なし（オープンラベル）

武器と介入

参加者グループ / アーム
介入・治療
実験的：NNZ-2591 Arm
The total duration of this study for each participant will be up to up to 56 weeks.
薬：NNZ-2591
研究薬は、1日に2回経口投与されます。

この研究は何を測定していますか？

主要な結果の測定

結果測定
メジャーの説明
時間枠
Long-term safety and tolerability of NNZ-2591 as assessed by the incidence of adverse events across participants
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：Baseline through Month 12
Incidence of abnormal, clinically significant physical examination findings
Baseline through Month 12

二次結果の測定

結果測定
メジャーの説明
時間枠
Efficacy of NNZ-2591 as measured by the Phelan-McDermid Syndrome Assessment of Change (PMSA-C) overall score
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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.
時間枠：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

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

Neuren Pharmaceuticals Limited

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (実際)

2026年6月8日

一次修了 (推定)

2028年10月29日

研究の完了 (推定)

2028年11月12日

試験登録日

最初に提出

2026年3月24日

QC基準を満たした最初の提出物

2026年5月13日

最初の投稿 (実際)

2026年5月18日

学習記録の更新

投稿された最後の更新 (実際)

2026年8月12日

QC基準を満たした最後の更新が送信されました

2026年8月10日

最終確認日

2026年8月1日

詳しくは

本研究に関する用語

キーワード

追加の関連 MeSH 用語

その他の研究ID番号

  • NEU-2591-PMS-302

個々の参加者データ (IPD) の計画

個々の参加者データ (IPD) を共有する予定はありますか?

いいえ

医薬品およびデバイス情報、研究文書

米国FDA規制医薬品の研究

はい

米国FDA規制機器製品の研究

いいえ

この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。

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