A Phase 2 Study of ONO-2808 in Patients With Multiple System Atrophy

June 24, 2026 updated by: Ono Pharmaceutical Co., Ltd.

A Phase 2, Double-blind, Placebo-controlled, Parallel-group Study Followed by an Open-label, Parallel Group Extension Part to Assess the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Potential Efficacy of Multiple Doses of ONO-2808 in Patients With Multiple System Atrophy

This is a Phase 2, double-blind, parallel-group, placebo-controlled study to assess the safety, tolerability, pharmacokinetics, pharmacodynamics, and efficacy of multiple doses of ONO-2808 in patients with MSA. This is the first study of ONO-2808 in patients with MSA.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This study will consist of a core part, an extension part, and an additional extension part. The purpose of the core part is to evaluate 3 doses of ONO-2808 compared to placebo in MSA patients, including: 1) safety and tolerability, 2) pharmacokinetics, and 3) changes in clinical outcome assessments (COA) and biomarkers considered to be related to the pharmacodynamics and potential efficacy of ONO-2808. The purpose of the extension part and the additional extension part is to evaluate 3 doses of ONO-2808 in MSA patients, including: 1) safety and tolerability and 2) changes in COAs and biomarkers considered to be related to the pharmacodynamics and potential efficacy of ONO-2808.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
92

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

  • Name: Helpdesk
  • Phone Number: 800-717-3185

Study Locations

  • Japan
    • Aichi-ken
      • Toyoake, Aichi-ken, Japan
        • Fujita Health University Hospital
    • Kyoto
      • Kyoto, Kyoto, Japan
        • National Hospital Organization Utano National Hospital
    • Miyagi
      • Sendai, Miyagi, Japan
        • National Hospital Organization Sendai Nishitaga Hospital
    • Osaka
      • Toyonaka, Osaka, Japan
        • National Hospital Organization Osaka Toneyama Medical Center
    • Tokyo
      • Fuchū, Tokyo, Japan
        • Tokyo Metropolitan Neurological Hospital
  • United States
    • California
      • Fountain Valley, California, United States, 92708
        • The Parkinson's Movement and Disorder Institute
      • Los Angeles, California, United States, 90033
        • University of Southern California
      • Los Angeles, California, United States, 90095
        • David Geffen School of Medicine at UCLA
      • Palo Alto, California, United States, 94304
        • Stanford University School of Medicine
    • Colorado
      • Englewood, Colorado, United States, 80113
        • CenExel Rocky Mountain Clinical Research
    • Connecticut
      • New Haven, Connecticut, United States, 06519
        • Yale School of Medicine - Yale Church Street Research Unit (CRSU)
    • Florida
      • Boca Raton, Florida, United States, 33486
        • Parkinson's Disease and Movement Disorders Center of Boca Raton
      • Gainesville, Florida, United States, 32608
        • Norman Fixel Institute for Neurological Diseases - University of Florida
      • Jacksonville, Florida, United States, 32224
        • Mayo Clinic in Florida
      • Miami, Florida, United States, 33136
        • University of Miami Miller School of Medicine
    • Georgia
      • Atlanta, Georgia, United States, 30329
        • Emory University School of Medicine
    • Kansas
      • Kansas City, Kansas, United States, 66160
        • University of Kansas Medical Center Research Institute
    • Massachusetts
      • Boston, Massachusetts, United States, 02115
        • Brigham and Women's Hospital
      • Boston, Massachusetts, United States, 02114
        • Massachusetts General Hospital
    • Michigan
      • Ann Arbor, Michigan, United States, 48109
        • University of Michigan School of Medicine
      • Farmington Hills, Michigan, United States, 48334
        • Quest Research Institute
    • Minnesota
      • Rochester, Minnesota, United States, 55905
        • Mayo Clinic - Rochester
    • Nebraska
      • Omaha, Nebraska, United States, 68198
        • University of Nebraska Medical Center
    • New York
      • New York, New York, United States, 10032
        • Columbia University
      • New York, New York, United States, 10019
        • Icahn School of Medicine at Mount Sinai
      • New York, New York, United States, 10016
        • NYU Langone Health - NYU Dysautonomia Center
    • Ohio
      • Cincinnati, Ohio, United States, 45219
        • University of Cincinnati College of Medicine
      • Cleveland, Ohio, United States, 44195
        • Cleveland Clinic
      • Columbus, Ohio, United States, 43201
        • Ohio State University
    • Pennsylvania
      • Hershey, Pennsylvania, United States, 17033
        • Penn State University - Milton S. Hershey Medical Center
      • Philadelphia, Pennsylvania, United States, 19107
        • The University of Pennsylvania - Pennsylvania Hospital
    • Texas
      • Dallas, Texas, United States, 75390
        • UT Southwestern Medical Center
    • Virginia
      • Richmond, Virginia, United States, 23298
        • Virginia Commonwealth University Medical Center
    • Washington
      • Kirkland, Washington, United States, 98034
        • Evergreen Health
      • Seattle, Washington, United States, 98122
        • Swedish Neuroscience Institute, Movement Disorders Clinic

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Female or male patients with a diagnosis of clinically-established or clinically-probable MSA according to the novel Movement Disorder Society (MDS) criteria for MSA diagnosis (2022), including patients with MSA of either subtype (MSA-P or MSA-C).

  2. Patients at the early stages of the disease, defined as a maximum of 5 years since the onset of one of the following symptoms associated with MSA:

    • Parkinsonism
    • Ataxia
    • Orthostatic hypotension and/or urinary dysfunction
  3. Patients with an anticipated survival of at least 3 years in the opinion of the Investigator.
  4. Patients who are able to ambulate without the assistance of another person, defined as the ability to take at least 10 steps and then to turn around and walk at least another 10 steps. Use of assistive devices (e.g., walker or cane) is allowed.
  5. Ability to swallow oral medication and be willing to adhere to the study intervention regimen.

Exclusion Criteria:

  1. Pregnant or lactating females.
  2. Patients with a clinically-significant or unstable medical or surgical condition other than MSA that, in the opinion of the Investigator, might preclude safe completion of the study or might affect the results of the study (e.g., pulmonary, cardiovascular [including bradyarrhythmia], macular edema, and significant renal or hepatic dysfunction).
  3. Neurological diseases/disorders other than MSA, such as Parkinson's disease, dementia with Lewy bodies, essential tremor, progressive supranuclear palsy, spinocerebellar ataxia, spastic paraparesis, corticobasal degeneration, or vascular, normal pressure hydrocephalus, pharmacological, or post-encephalitic parkinsonism.
  4. Patients with documented liver diseases or cirrhosis.
  5. Positive results at Screening for active viral infections that include positive human immunodeficiency virus (HIV), hepatitis B surface antigen (HBsAg) and hepatitis B core antibody, and hepatitis C virus (HCV).
  6. Patients with suicide ideation according to the Investigator's clinical judgment per the Columbia Suicide Severity Rating Scale (C-SSRS) at Screening or who have made a suicide attempt in the 6 months before Screening.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Placebo Comparator: Placebo Arm
Drug: Placebo
Oral administration of placebo once daily for 24 weeks in the core part and for a total of 32 weeks including the extension part; Transition to low-dose of ONO-2808 for remainder of the extension part until week 80 and for up to an additional 72 weeks in the additional extension part
Experimental: ONO-2808 Arm
Drug: ONO-2808
Oral administration of ONO-2808 at low, middle or high doses once daily for 24 weeks in the core part, for a total of 80 weeks including the extension part, and for up to an additional 72 weeks in the additional extension part

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Incidence and severity of treatment-emergent adverse events (TEAEs) and treatment-emergent serious adverse events (TESAEs)
Time Frame: From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Incidence of TEAEs, drug-related TEAEs, TEAEs resulting in study treatment discontinuation, TESAEs, and drug-related TESAEs will be tabulated by system organ class (SOC), preferred term (PT), and severity.
From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Vital signs (blood pressure)
Time Frame: From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Summaries of clinically significant and non-clinically significant abnormalities will be provided by each time point.
From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Vital signs (pulse rate)
Time Frame: From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Summaries of clinically significant and non-clinically significant abnormalities will be provided by each time point.
From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Vital signs (temperature)
Time Frame: From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Summaries of clinically significant and non-clinically significant abnormalities will be provided by each time point.
From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Vital signs (respiratory rate)
Time Frame: From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Summaries of clinically significant and non-clinically significant abnormalities will be provided by each time point.
From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
12-lead electrocardiograms (ECGs); parameters such as, but not limited to, heart rate, RR, PR, QRS, QT, and corrected QT intervals (QTcF)
Time Frame: From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
The number of patients with normal, abnormal not clinically significant and abnormal clinically significant of ECG results will be tabulated at each time point.
From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Clinically-significant abnormal physical examination findings
Time Frame: From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
The number of patients with normal, abnormal not clinically significant and abnormal clinically significant of physical examination results will be tabulated at each time point.
From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Clinical laboratory abnormalities (hematology, clinical chemistry, and urinalysis)
Time Frame: From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
The number of patients with abnormal laboratory results at any time during the study will be tabulated.
From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Clinically-abnormal findings in the Columbia Suicide Severity Rating Scale (C-SSRS)
Time Frame: From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)
Responses to the suicidality assessment scale (C-SSRS) will be listed.
From screening up to follow-up for the core part, for the extension part, and for the additional extension part (up to Week 164)

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Plasma concentration of ONO-2808
Time Frame: Week 2, Week 8, Week 12, and Week 24
Descriptive summary statistics will be calculated for ONO-2808 plasma concentrations, by dose level and time point.
Week 2, Week 8, Week 12, and Week 24

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Ono Pharmaceutical Co., Ltd.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Project Leader, Ono Pharmaceutical Co., Ltd.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 22, 2023

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 15, 2025

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
October 31, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 7, 2023

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 20, 2023

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
June 28, 2023

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 29, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 24, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
June 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • ONO-2808-03
  • jRCT2041230153 (Registry Identifier: Japan Registry of Clinical Trials)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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