← Eichor
Study identifier: NCT06477653 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Dupilumab as Add-On Therapy for Hypereosinophilic Syndrome With Partial Clinical Response to Eosinophil-Depleting Biologic Agents

Condition: Hypereosinophilic Syndrome  ·  Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)

PhasePhase 2
Planned participants30
Who can joinAll sexes, 18 Years to 99 Years
Healthy volunteersNo

About this study

Background: Hypereosinophilic syndrome (HES) is a blood disorder that causes high levels of white blood cells called eosinophils. HES can damage the lungs and airways, intestines, skin, and other organs. The current primary treatment for HES can cause serious side effects. Secondary treatments do not work in all people. Objective: To test an approved drug (dupilumab), combined with other drugs, in people with HES. Eligibility: People aged 18 years and older who take drugs (mepolizumab, reslizumab, or benralizumab) to treat HES. Design: Participants will have up to 6 clinic visits and 7 remote visits in up to 48 weeks. Participants will be screened. They will have blood and urine tests. They will have a test of their heart function. They will take surveys about how HES affects their daily life. Some participants may have a bone marrow biopsy: A sample of tissue and fluid from inside a bone will be removed with a large needle. Participants will have other tests specific to their symptoms. For example, those with symptoms affecting their lungs will have breathing tests. Others may have tests that target symptoms in their sinuses, gastrointestinal tract, or skin. Dupilumab is injected under the skin once every 1 or 2 weeks. Dose and timing will vary among participants. They will be taught how to inject themselves at home between clinic visits. They will take dupilumab plus their current medications for 24 weeks. If the drug is helping them, they will continue taking it …

This description comes directly from the study's public registry record.

Talk to the study team

Amy D Klion, M.D.  ·  (240) 381-6073  ·  amy.klion@nih.gov

Always discuss trial participation with your own doctor first.

Locations (1)

National Institutes of Health Clinical CenterBethesda, Maryland, United StatesRecruiting

Follow this study

Get one email when the public record changes — results posted, or the study's status changes. Nothing else, ever.

We email about this public record only. Unsubscribe anytime with one click. Never medical advice.

Is this your study? This page was generated automatically from the public registry record. Sponsors can claim it — free — to add branding and verified contact routing. Claim this page →

This page is independently generated by Eichor from the public ClinicalTrials.gov record and re-synced daily. It is not the sponsor's official website unless claimed. Nothing here is medical advice; eligibility is always determined by the study team — talk to your own doctor first.

Source record: clinicaltrials.gov/study/NCT06477653