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Sickle Cell DiseasePhase 2GLADIOLUSNCT04987489

A Study of Etavopivat in Patients With Thalassemia or Sickle Cell Disease

A Phase 2 study testing Etavopivat tablets in people with Sickle Cell Disease and Thalassemia, run by Forma Therapeutics, Inc. at 32 sites in 6 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This clinical trial is a Phase 2 study that will evaluate the safety and clinical activity of etavopivat in patients with thalassemia or sickle cell disease and test how well etavopivat works to lower the number of red blood cell transfusions required and increase hemoglobin. Read more about this study

Who is it for?
Ages 12 to 65 years
Conditions the study is for
Sickle Cell Disease, Thalassemia
What is being tested?
Etavopivat tablets
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
53 participants
Where
32 sitesin 6 countries
Study dates
28 Mar 2022to 24 Sep 2025
Phase
Phase 2
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 12 to 65 years
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Who may be able to join

  • Provision of consent
  • Female patients of childbearing potential must use acceptable methods of contraception, male patients are willing to use barrier methods of contraception
  • Cohort A (Sickle Cell Disease Transfusion Cohort)
  • Confirmed diagnosis of sickle cell disease
  • Chronically red blood cell transfused (sample or exchange [manual or via electrophoresis]) for primary stroke prevention or due to previous stroke. Chronic red blood cell transfusion is defined as: ≥ 6 red blood cell units in the previous 24 weeks before the first dose of study treatment and no transfusion-free period for > 35 days during that period
  • At least 24 months of chronic monthly red blood cell transfusions for secondary stroke prevention/treatment of primary stroke (initial completed overt clinical stroke with documented infarction on brain computed tomography [CT] or magnetic resonance imaging [MRI])
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  • Prior to screening OR at least 12 months of chronic RBC transfusions for primary stroke prevention (abnormal TCD) prior to screening
  • Documented adequate monthly transfusions with average HbS ≤ 45% (the upper limit of the established academic community standard) for the previous 12 weeks of red blood cell transfusions before the first dose of study treatment
  • Cohort B (Thalassemia Transfusion Cohort)
  • Documented diagnosis of β-thalassemia, Hemoglobin E/ β-thalassemia or Hemoglobin H (α-thalassemia), or other thalassemia variant
  • Chronically transfused, defined as: ≥ 6 red blood cell units in the previous 24 weeks before the first dose of study treatment and no transfusion-free period for > 35 days during that period
  • Cohort C (Thalassemia Non-transfused Cohort)
  • Documented diagnosis of β-thalassemia, Hemoglobin E/ β-thalassemia or Hemoglobin H (α-thalassemia), or other thalassemia variant
  • Hemoglobin ≤ 10 g/dL

Who cannot join

  • Female who is breast feeding or pregnant
  • Hepatic dysfunction characterized by:
  • Alanine aminotransferase (ALT) > 4.0 × upper limit of normal (ULN)
  • Direct bilirubin > 3.0 × ULN
  • History of cirrhosis
  • Known human immunodeficiency virus (HIV) positivity
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  • Active hepatitis B or hepatitis C infection
  • Severe renal dysfunction or on chronic dialysis
  • History of malignancy within the past 2 years prior to treatment Day 1 requiring systemic chemotherapy and/or radiation.
  • Patients with malignancy considered surgically cured are eligible (eg, non- melanoma skin cancer, cancer of the cervix in-situ, ductal carcinoma in situ [Stage 1], Grade 1 endometrial cancer)
  • History of unstable or deteriorating cardiac or pulmonary disease within 6 months prior to consent including but not limited to the following:
  • Unstable angina pectoris or myocardial infarction or elective coronary intervention
  • Congestive heart failure requiring hospitalization
  • Uncontrolled clinically significant arrhythmias
  • Symptomatic pulmonary hypertension

Trial locations and contacts

32 sites in 6 countries.

32 sites in 6 countries

United States14 sites
  • Children's Hospital of Atlanta

    Atlanta, Georgia, 30342

  • TOI Clinical Research

    Cerritos, California, 90703

  • [Legal] Children's Hospital Medical Center dba Cincinnati Children's

    Cincinnati, Ohio, 45229

  • [Legal] Dr. Vince Clinical Research, LLC and Dr. Vince Clinical Research, P.A.

    Detroit, Michigan, 48201-2018

  • Duke University

    Durham, North Carolina, 27710

  • East Carolina University

    Greenville, North Carolina, 27858

  • [Legal] Children's Hospital Los Angeles

    Los Angeles, California, 90027

  • University of Californ LA-UCLA

    Los Angeles, California, 90095

  • Weill Medical College of Cornell University

    New York, New York, 10065

  • UCSF Oakland Benioff ChildHosp

    Oakland, California, 94609

  • [Legal] Children's Hospital of Orange County on behalf of CHOC Children's Hospital of Orange County

    Orange, California, 92868

  • UCI Health

    Orange, California, 92868

  • Children's Hosptl Philadelphia

    Philadelphia, Pennsylvania, 19104

  • Children's National Health Hospital

    Washington D.C., District of Columbia, 20010

Other trials in United States

United Kingdom6 sites
  • Sandwell and West Birmingham NHS Trust SCAT/ haematology

    Birmingham, B18 7QH

  • Barts Health NHS Trust - The Royal London Hospital

    London, E1 1FR

  • University College Hospital - University College London Hospitals NHS Foundation Trust

    London, NW1 2PG

  • Kings College London

    London, SE5 9RS

  • Hammersmith Hospital - London

    London, W12 0HS

  • Manchester University NHS Foundation Trust

    Manchester, M13 9WL

Other trials in United Kingdom

Canada4 sites
  • Master Centre for Canada

    Mississauga, Ontario, L4W 4XI

  • CHU Sainte-Justine Mother and Child University Hospital

    Montreal, Quebec, H3T 1C5

  • The Hospital for Sick Children

    Toronto, Ontario, M5G 1X8

  • University Health Network - Toronto General Hospital

    Toronto, Ontario, M5G 2C4

Other trials in Canada

Italy4 sites
  • Galliera Hospital Centro Anemie Congenite

    Genova, 16128

  • Fondazione IRCSS Ca' Granda Ospedale Maggiore Policlinico

    Milan, 20122

  • AORN A. Cardarelli

    Naples, 80131

  • A.O.U. Università Studi della Campania "Luigi Vanvitelli"

    Naples, 80138

Other trials in Italy

Egypt2 sites
  • Cairo University

    Cairo, 12613

  • Abu El-Reesh El-Mounira Children University Hospital

    Cairo, Egypt, 4241317

Other trials in Egypt

Lebanon2 sites
  • Chronic Care Center

    Baabda, RGWX 4CG

  • Hospital Nini

    Tripoli, 1434

Other trials in Lebanon

About this study

Official title: A Phase 2 Open-Label Study to Evaluate Safety and Clinical Activity of Etavopivat in Patients With Thalassemia or Sickle Cell Disease

This clinical trial is a Phase 2 study that will evaluate the safety and clinical activity of etavopivat in patients with thalassemia or sickle cell disease and test how well etavopivat works to lower the number of red blood cell transfusions required and increase hemoglobin.

Read the detailed description

Etavopivat is a potent, selective, orally bioavailable, small-molecule activator of pyruvate kinase red blood cell (PKR) being developed by Forma Therapeutics, Inc and is intended for use as a treatment for patients with sickle cell disease (SCD) or other inherited hemoglobinopathies or refractory anemias. This study is a multicenter, Phase 2, open-label, multiple-cohort study examining the safety and efficacy of etavopivat for the treatment of patients, age 12 to 65 years, with SCD or thalassemia. Three treatment cohorts based on the patients hemoglobinopathy (SCD or thalassemia) and transfusion requirements will be evaluated.

Being tested
Etavopivat tablets
Keywords
SCD, sickle cell disease, sickle cell, anemia, sickle cell anemia, hemolytic, hemoglobin, vaso-occlusive crisis, VOC, vaso-occlusive events, sickle cell crisis, pain crisis, pain episode, congenital anemia, hemolytic anemia, hematologic disease, hemoglobinopathy, hemoglobinopathies, genetic disease, inborn disease
Medical subject headings
Anemia, Sickle Cell, Thalassemia, Anemia, Hemolysis, Vaso-Occlusive Crises, Anemia, Hemolytic, Hematologic Diseases, Hemoglobinopathies

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Etavopivat tabletsDrug

    Also called FT-4202

    Etavopivat 400 mg once daily

Study groups in NCT04987489
Study groupRoleWhat they receive
Etavopivat 400 mg daily - SCD with transfusionsExperimentalPatients with sickle cell disease on chronic red blood cell transfusions
Receives: Drug: Etavopivat tablets
Etavopivat 400 mg daily - Thalassemia with transfusionsExperimentalPatients with thalassemia on chronic red blood cell transfusions
Receives: Drug: Etavopivat tablets
Etavopivat 400 mg daily - ThalassemiaExperimentalPatients with thalassemia not on chronic red blood cell transfusions
Receives: Drug: Etavopivat tablets

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Cohorts A: Proportion of patients with ≥ 20% reduction in red blood cell transfusions over a continuous 12-week treatment period versus baseline red blood cell transfusion history

    Proportion of patients with ≥ 20% reduction in red blood cell transfusions over a continuous 12-week treatment period versus baseline red blood cell transfusion history

    Measured: 12 weeks

  2. Cohorts B: Proportion of patients with ≥ 20% reduction in red blood cell transfusions over a continuous 12-week treatment period versus baseline red blood cell transfusion history

    Proportion of patients with ≥ 20% reduction in red blood cell transfusions over a continuous 12-week treatment period versus baseline red blood cell transfusion history

    Measured: 12 weeks

  3. Cohort C: Hemoglobin response rate at Week 12 (increase of ≥ 1.0 g/dL from baseline)

    Hemoglobin response rate at Week 12 (increase of ≥ 1.0 g/dL from baseline)

    Measured: 12 weeks

Secondary outcomes (17)
  1. Cohort A: Proportion of patients with ≥ 33% reduction in red blood cell transfusion over a continuous 12-week treatment period versus baseline red blood cell transfusion history

    Proportion of patients with ≥ 33% reduction in red blood cell transfusion over a continuous 12-week treatment period versus baseline red blood cell transfusion history

    Measured: 12 weeks

  2. Cohort B: Proportion of patients with ≥ 33% reduction in red blood cell transfusion over a continuous 12-week treatment period versus baseline red blood cell transfusion history

    Proportion of patients with ≥ 33% reduction in red blood cell transfusion over a continuous 12-week treatment period versus baseline red blood cell transfusion history

    Measured: 12 weeks

  3. Cohort A: Reduction in red blood cell transfusions over 12 weeks

    Reduction in red blood cell transfusions over 12 weeks

    Measured: 12 weeks

  4. Cohort A: Reduction in red blood cell transfusions over 24 weeks

    Reduction in red blood cell transfusions over 24 weeks

    Measured: 24 weeks

  5. Cohort A: Reduction in red blood cell transfusions over 48 weeks

    Reduction in red blood cell transfusions over 48 weeks

    Measured: 48 weeks

  6. Cohort B: Reduction in red blood cell transfusions over 12 weeks

    Reduction in red blood cell transfusions over 12 weeks

    Measured: 12 weeks

  7. Cohort B: Reduction in red blood cell transfusions over 24 weeks

    Reduction in red blood cell transfusions over 24 weeks

    Measured: 24 weeks

  8. Cohort B: Reduction in red blood cell transfusions over 48 weeks

    Reduction in red blood cell transfusions over 48 weeks

    Measured: 48 weeks

  9. Cohort C: Hemoglobin response rate at Week 24 (increase of ≥ 1.0 g/dL from baseline).

    Hemoglobin response rate at Week 24 (increase of ≥ 1.0 g/dL from baseline).

    Measured: 24 weeks

  10. Cohort C: Hemoglobin response rate at Week 48 (increase of ≥ 1.0 g/dL from baseline).

    Hemoglobin response rate at Week 48 (increase of ≥ 1.0 g/dL from baseline).

    Measured: 48 weeks

  11. Change from baseline in hemoglobin over 12 weeks

    Change from baseline in hemoglobin over 12 weeks

    Measured: 12 weeks

  12. Change from baseline in hemoglobin over 24 weeks

    Change from baseline in hemoglobin over 24 weeks

    Measured: 24 weeks

  13. Change from baseline in hemoglobin over 48 weeks

    Change from baseline in hemoglobin over 48 weeks

    Measured: 48 weeks

  14. Changes in serum ferritin levels at 12 weeks versus baseline

    Changes in serum ferritin levels at 12 weeks versus baseline

    Measured: 12 weeks

  15. Changes in serum ferritin levels at 24 weeks versus baseline

    Changes in serum ferritin levels at 24 weeks versus baseline

    Measured: 24 weeks

  16. Changes in serum ferritin levels at 48 weeks versus baseline

    Changes in serum ferritin levels at 48 weeks versus baseline

    Measured: 48 weeks

  17. Changes in liver iron concentration at 48 weeks versus baseline

    Changes in liver iron concentration at 48 weeks versus baseline

    Measured: 48 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted3 Aug 2021
  2. Study start28 Mar 2022
  3. Primary completion3 Sep 2025
  4. Study completion24 Sep 2025

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Single group
Masking
None (open label)
Enrolment
53 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04987489
Sponsor's protocol ID
4202-HEM-201
Acronym
GLADIOLUS
Status last verified
Dec 2025
First submitted
22 Jul 2021
Last updated
16 Dec 2025
Results posted
No
FDA-regulated drug
Yes
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Etavopivat tablets in people with Sickle Cell Disease and Thalassemia, run by Forma Therapeutics, Inc. at 32 sites in 6 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 14 inclusion and 15 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 16 Dec 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 32 sites in United States, United Kingdom, Canada, Italy, Egypt and 1 more country. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Cohorts A: Proportion of patients with ≥ 20% reduction in red blood cell transfusions over a continuous 12-week treatment period versus baseline red blood cell transfusion history (time frame: 12 weeks). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Dec 2025.

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