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A Prospective Exploratory Study of the Safety and Preliminary Efficacy of the α-Syn H21 Monoclonal Antibody in Patients With Multiple System Atrophy

2026年8月17日 更新者:Ruijin Hospital

Multiple system atrophy (MSA) is a progressive neurodegenerative disorder characterized by autonomic dysfunction, parkinsonism, and cerebellar ataxia. Abnormal aggregation of alpha-synuclein is believed to play an important role in disease progression. The α-Syn H21 monoclonal antibody is designed to selectively bind pathological alpha-synuclein aggregates and may reduce their spread and related neuroinflammation.

This single-center, prospective, exploratory study will evaluate the safety, tolerability, and preliminary efficacy of the α-Syn H21 monoclonal antibody in patients with MSA. Participants will receive intravenous infusions of H21 every 4 weeks for 3 doses and will be followed for 12 weeks. Clinical symptoms, laboratory tests, imaging findings, and adverse events will be assessed to determine whether H21 may provide clinical benefit and support future larger studies.

調査の概要

状態

まだ募集していません

条件

介入・治療

研究の種類

介入

入学 (推定)

3

段階

  • フェーズ 1

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

研究連絡先のバックアップ

研究場所

    • Shanghai Municipality
      • Shanghai、Shanghai Municipality、中国、200025
        • Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, Shanghai 200025
        • コンタクト:

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

  • 大人
  • 高齢者

健康ボランティアの受け入れ

いいえ

説明

Inclusion Criteria:

  • Age 45 to 75 years, male or female
  • Diagnosis of Multiple System Atrophy meeting current clinical diagnostic criteria for probable or possible MSA
  • Disease duration of 2 years or less from onset of motor or autonomic symptoms
  • Clinically stable disease without significant fluctuation or acute worsening within 4 weeks before enrollment
  • Able to comply with study procedures and follow-up assessments
  • Mini-Mental State Examination (MMSE) score not consistent with significant dementia
  • Willing and able to provide written informed consent

Exclusion Criteria:

  • History or presence of other neurological disorders that may interfere with study assessments, including Parkinson's disease, progressive supranuclear palsy, corticobasal degeneration, or stroke
  • Severe cognitive impairment or psychiatric disorder, including clinically significant depression or anxiety
  • Severe cardiac, hepatic, renal, or other major systemic disease
  • History of severe hypersensitivity to monoclonal antibody therapies Pregnant or breastfeeding women
  • Women or men unwilling to use effective contraception during the study
  • Participation in another clinical trial or receipt of investigational treatment within 3 months before enrollment
  • Any other condition that, in the investigator's judgment, would make participation inappropriate

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:H21 Treatment
The α-Syn H21 monoclonal antibody is a humanized monoclonal antibody designed to selectively bind pathological alpha-synuclein aggregates. Participants will receive the study drug by intravenous infusion once every 4 weeks for a total of 3 doses during the 12-week study period.

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
Incidence of treatment-emergent adverse events
時間枠:From first dose through Week 12
Incidence, severity, and relationship of adverse events (AEs) and serious adverse events (SAEs) to study treatment.
From first dose through Week 12
Change from Baseline in Unified Multiple System Atrophy Rating Scale (UMSARS) Total Score (Parts I-IV)
時間枠:Baseline, Week 4, Week 8, and Week 12
Change from baseline in the total score and subscale scores of the Unified Multiple System Atrophy Rating Scale (UMSARS Parts I-IV). The UMSARS is a clinician-administered scale used to assess disease severity in patients with multiple system atrophy. Total scores are derived from Parts I-IV, with higher scores indicating greater disease severity and worse clinical status. The total score ranges from 0 to 249, with higher scores indicating more severe impairment.
Baseline, Week 4, Week 8, and Week 12
Change from baseline in DAT-PET/MRI measures of striatal dopamine transporter uptake and brain structural changes
時間枠:Baseline and Week 12
Change from baseline in DAT-PET/MRI imaging parameters, including brain metabolic and structural changes.
Baseline and Week 12

二次結果の測定

結果測定
メジャーの説明
時間枠
Change from Baseline in Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) Total Score
時間枠:Baseline, Week 4, Week 8, and Week 12
Change from baseline in the Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS Parts I-IV) total and subscale scores. The MDS-UPDRS is a clinician-administered scale used to assess the severity and progression of Parkinsonian symptoms. The total score ranges from 0 to 260, with higher scores indicating greater disease severity and worse motor and non-motor impairment.
Baseline, Week 4, Week 8, and Week 12
Change in Patient Global Impression of Improvement (PGI-I) Score
時間枠:Baseline, Week 4, Week 8, and Week 12
The Patient Global Impression of Improvement (PGI-I) is a patient-reported measure assessing overall perceived improvement following treatment. Scores range from 1 (very much improved) to 7 (very much worse), with lower scores indicating better perceived improvement.
Baseline, Week 4, Week 8, and Week 12
Change from Baseline in Mini-Mental State Examination (MMSE) Score
時間枠:Baseline, Week 4, Week 8, and Week 12
Change from baseline in the Mini-Mental State Examination (MMSE) score. The MMSE is a widely used clinician-administered screening tool for global cognitive function, assessing domains including orientation, attention, memory, language, and visuospatial abilities. Scores range from 0 to 30, with higher scores indicating better cognitive function and lower scores indicating greater cognitive impairment.
Baseline, Week 4, Week 8, and Week 12
Change from Baseline in Hamilton Depression Rating Scale (HAMD) Score
時間枠:Baseline, Week 4, Week 8, and Week 12
Change from baseline in the Hamilton Depression Rating Scale (HAMD) score. The HAMD is a clinician-administered scale used to assess the severity of depressive symptoms. Scores range from 0 to 52 (17-item version), with higher scores indicating more severe depressive symptoms and lower scores indicating less severe depression.
Baseline, Week 4, Week 8, and Week 12
Change from Baseline in Hamilton Anxiety Rating Scale (HAMA) Score
時間枠:Baseline, Week 4, Week 8, and Week 12
Change from baseline in the Hamilton Anxiety Rating Scale (HAMA) score. The HAMA is a clinician-administered scale used to assess the severity of anxiety symptoms. Scores range from 0 to 56, with higher scores indicating more severe anxiety symptoms and lower scores indicating less severe anxiety.
Baseline, Week 4, Week 8, and Week 12
Change from Baseline in Parkinson's Disease Sleep Scale-2 (PDSS-2) Score
時間枠:Baseline, Week 4, Week 8, and Week 12
Change from baseline in the Parkinson's Disease Sleep Scale-2 (PDSS-2) score. The PDSS-2 is a patient-reported scale used to assess the severity of nocturnal disturbances and sleep-related symptoms in patients with Parkinson's disease. Scores range from 0 to 60, with higher scores indicating more severe sleep disturbances and poorer sleep quality.
Baseline, Week 4, Week 8, and Week 12
Change from Baseline in Parkinson's Disease Questionnaire-39 (PDQ-39) Score
時間枠:Baseline, Week 4, Week 8, and Week 12
Change from baseline in the Parkinson's Disease Questionnaire-39 (PDQ-39) score. The PDQ-39 is a patient-reported questionnaire used to assess health-related quality of life in patients with Parkinson's disease across eight domains, including mobility, activities of daily living, emotional well-being, and social support. Scores range from 0 to 156, with higher scores indicating poorer health-related quality of life and greater disease impact.
Baseline, Week 4, Week 8, and Week 12
Number of Participants With Clinically Significant Abnormal Laboratory Values
時間枠:Baseline, Week 4, Week 8, and Week 12
The number of participants with clinically significant abnormal laboratory values following H21 administration, including abnormalities in hematology, urinalysis, liver function, and renal function tests, as assessed by the investigator.
Baseline, Week 4, Week 8, and Week 12
Change from baseline in electrocardiogram parameters including heart rhythm, PR interval, QRS duration, and QTc interval
時間枠:Baseline, Week 4, Week 8, and Week 12
Standard 12-lead electrocardiograms will be performed at scheduled visits to assess changes from baseline in cardiac conduction and rhythm parameters, including heart rhythm, PR interval, QRS duration, and corrected QT (QTc) interval, following H21 administration.
Baseline, Week 4, Week 8, and Week 12
Change in Blood Pressure After Infusion
時間枠:Pre-dose and 10 minutes and 30 minutes after each infusion through Week 12
Change in blood pressure measured before each H21 infusion and at 10 minutes and 30 minutes after infusion to evaluate short-term hemodynamic changes associated with study drug administration.
Pre-dose and 10 minutes and 30 minutes after each infusion through Week 12
Change in Heart Rate After Infusion
時間枠:Pre-dose and 10 minutes and 30 minutes after each infusion through Week 12
Change in heart rate measured before each H21 infusion and at 10 minutes and 30 minutes after infusion to evaluate short-term cardiac responses associated with study drug administration.
Pre-dose and 10 minutes and 30 minutes after each infusion through Week 12
Change in Respiratory Rate After Infusion
時間枠:Pre-dose and 10 minutes and 30 minutes after each infusion through Week 12
Change in respiratory rate measured before each H21 infusion and at 10 minutes and 30 minutes after infusion to evaluate short-term respiratory changes associated with study drug administration.
Pre-dose and 10 minutes and 30 minutes after each infusion through Week 12
Serum Concentration of H21
時間枠:During treatment through Week 12
Serum concentrations of H21 will be measured at prespecified time points following administration to characterize the concentration-time profile of H21.
During treatment through Week 12
Maximum Observed Serum Concentration (Cmax) of H21
時間枠:During treatment through Week 12
The maximum observed serum concentration (Cmax) of H21 following administration.
During treatment through Week 12
Time to Maximum Observed Serum Concentration (Tmax) of H21
時間枠:During treatment through Week 12
The time to reach the maximum observed serum concentration (Tmax) of H21 following administration.
During treatment through Week 12
Area Under the Serum Concentration-Time Curve (AUC) of H21
時間枠:During treatment through Week 12
The area under the serum concentration-time curve (AUC) of H21 following administration.
During treatment through Week 12
Terminal Elimination Half-life (t1/2) of H21
時間枠:During treatment through Week 12
The terminal elimination half-life (t1/2) of H21 following administration.
During treatment through Week 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

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 (推定)

2026年9月15日

一次修了 (推定)

2026年12月31日

研究の完了 (推定)

2026年12月31日

試験登録日

最初に提出

2026年5月12日

QC基準を満たした最初の提出物

2026年8月17日

最初の投稿 (実際)

2026年8月19日

学習記録の更新

投稿された最後の更新 (実際)

2026年8月19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17日

最終確認日

2026年4月1日

詳しくは

本研究に関する用語

その他の研究ID番号

  • H21-MSA

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

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