A Phase 3 Evaluation of Sutacimig in Glanzmann Thrombasthenia (SOLARA)

November 9, 2026 updated by: Hemab ApS

SOLARA: A Phase 3 Study of the Efficacy and Safety of Sutacimig in Participants With Glanzmann Thrombasthenia

Glanzmann thrombasthenia (GT) is a serious inherited bleeding disorder. In GT, platelets, the blood cells that normally stick together at the site of an injury to stop bleeding, are unable to properly do so. As a result, bleeding does not stop as it should. Bleeding in GT often starts without warning, can happen frequently, and can be severe. It most commonly affects the nose, mouth and gums, gastrointestinal tract, and skin, and many women and girls with GT experience heavy menstrual bleeding. Over time, bleeding can lead to iron deficiency and anemia. Some bleeding episodes require emergency care, hospitalization, transfusion, or surgery, and some can be life-threatening.

Sutacimig is an investigational medicine given as an injection under the skin (subcutaneous injection). It is designed to help platelets work at the site of bleeding despite the underlying defect in GT. It is intended to be given regularly to help prevent bleeding (prophylaxis), rather than only to treat bleeding after it starts.

The purpose of this study is to find out whether sutacimig, given as prophylaxis, reduces the number of treated bleeding episodes in people with GT compared with no prophylaxis, and to evaluate its safety and tolerability.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
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.

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 (Estimated)

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.
76

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 3

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 Locations

  • United States
    • California
      • La Jolla, California, United States, 92037
        • Recruiting
        • University of California San Diego (UC San Diego) Health - Jacobs Medical Center
      • Los Angeles, California, United States, 90027
        • Recruiting
        • Children's Hospital Los Angeles
      • Sacramento, California, United States, 95817
        • Recruiting
        • University of California Davis (UC Davis) Medical Center
      • San Francisco, California, United States, 94143
        • Recruiting
        • University of California San Francisco (UCSF) Medical Center
    • Indiana
      • Indianapolis, Indiana, United States, 46260
        • Recruiting
        • Innovative Hematology - Indiana Hemophilia & Thrombosis Center
    • Minnesota
      • Minneapolis, Minnesota, United States, 55455
        • Recruiting
        • M Health Fairview - University of Minnesota Medical Center
    • New York
      • New York, New York, United States, 10065
        • Recruiting
        • New York-Presbyterian - Weill Cornell Medical Center
    • North Carolina
      • Durham, North Carolina, United States, 27709
        • Recruiting
        • Science 37
    • Texas
      • Houston, Texas, United States, 77030
        • Recruiting
        • Gulf States Hemophilia and Thrombophilia Center - Texas Medical Center

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

12 years to 70 years (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Has the ability to provide informed consent to participate in the clinical study before completing any study-related procedures, and has an understanding, ability, and willingness to comply with clinical study procedures and restrictions.

  • Adults 18 to 70 years.

  • Adolescents 12 to <18 years, dependent on geographical location.

  • Has clinical bleeding phenotype consistent with Glanzmann thrombasthenia (GT) and documentation of either diagnostic laboratory criteria (a) or (b) below:

    1. Abnormal platelet aggregometry AND flow cytometry
    2. A confirmed genetic mutation in ITGA2B or ITGB3.

  • Participants have experienced at least four treated bleeding events related to GT within the 12 months prior to Screening.

Exclusion Criteria:

  • Prior exposure to sutacimig.
  • History of clinically significant hypersensitivity associated with monoclonal antibody therapies.
  • Congenital or acquired bleeding disorders other than GT.
  • Medical condition (other than GT) that constitutes an increased risk of having uncontrolled bleeding events during the study or other conditions per Investigator discretion.
  • History of venous or arterial thromboembolic (TE) event or TE disease except for catheter-associated vein thrombosis.
  • Co-existing thrombophilia disorder.

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: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

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.
Experimental: Sutacimig

Participants will receive sutacimig 0.2 milligrams per kilogram (mg/kg) by subcutaneous injection once weekly for 48 weeks. Upon completion of the 48-week treatment period, participants will be offered the opportunity to transition to a separate open-label extension (OLE) study for continued assessment of the prophylactic treatment with sutacimig.
Drug: Sutacimig

Sutacimig will be administered by subcutaneous injection.

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
Time Frame
Annualized Treated Bleed Rate (ATBR)
Time Frame: From the first dose through Week 48
From the first dose through Week 48

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
Time Frame
High-Intensity Annualized Treated Bleed Rate (Hi-ATBR)
Time Frame: From the first dose through Week 48
From the first dose through Week 48
Annualized Treated Bleed Days (ATBD)
Time Frame: From the first dose through Week 48
From the first dose through Week 48
Annualized Treated Bleed Rate (ATBR) by Bleeding Event Type
Time Frame: From the first dose through Week 48
From the first dose through Week 48
Annualized Treated Bleed Rate (ATBR) by Bleeding Event Cause
Time Frame: From the first dose through Week 48
From the first dose through Week 48
Percentage of Participants With Reductions in Annualized Treated Bleed Rate (ATBR)
Time Frame: From the first dose through Week 48
From the first dose through Week 48
Percentage of Participants With Reductions in High-Intensity Annualized Treated Bleed Rate (Hi-ATBR)
Time Frame: From the first dose through Week 48
From the first dose through Week 48
Number of Participants With Treatment-Emergent Adverse Events (TEAEs)
Time Frame: From the first dose through Week 56
From the first dose through Week 56
Number of Participants With Physical Examination Abnormalities
Time Frame: From the first dose through Week 56
From the first dose through Week 56
Number of Participants With Vital Sign Abnormalities
Time Frame: From the first dose through Week 56
From the first dose through Week 56
Number of Participants With Clinical Laboratory Test Abnormalities
Time Frame: From the first dose through Week 56
From the first dose through Week 56
Number of Participants With Anti-Drug Antibody (ADA) Development
Time Frame: From the first dose through Week 56
From the first dose through Week 56
Number of Participants With Changes in Electrocardiogram (ECG) Parameters
Time Frame: From the first dose through Week 56
From the first dose through Week 56
Plasma Concentration for Sutacimig
Time Frame: Baseline through Week 56
Baseline through Week 56

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.
Hemab ApS

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: Medical Director, Hemab

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.
October 27, 2026

Primary Completion (Estimated)

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.
November 1, 2029

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.
January 1, 2030

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).
November 9, 2026

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.
November 9, 2026

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.
November 13, 2026

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.
November 13, 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.
November 9, 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.
November 1, 2026

More Information

Terms related to this study

Keywords

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.
  • HMB-001-103
  • U1111-1342-3293 (Other Identifier: Universal Trial Number)

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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