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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

NCT07774585 · Status: NOT_YET_RECRUITING · Phase: PHASE1 · Type: INTERVENTIONAL · Enrollment: 3

Last updated 2026-08-19

No results posted yet for this study

Summary

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.

Conditions

Interventions

BIOLOGICAL

α-Syn H21 Monoclonal Antibody

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.

Sponsors & Collaborators

  • Ruijin Hospital

    lead OTHER

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
45 Years
Max Age
75 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-09-15
Primary Completion
2026-12-31
Completion
2026-12-31

Countries

  • China

Study Locations

More Related Trials

Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07774585 on ClinicalTrials.gov