Hypereosinophilic syndrome
MONDO:0015691Hypereosinophilic syndrome (HES) constitutes a rare and heterogeneous group of disorders, defined as persistent and marked blood eosinophilia and/or tissue eosinophilia associated with a wide range of clinical manifestations reflecting eosinophil-induced tissue/organ damage.
Also known as: HES, hypereosinophilic disease, hypereosinophilic disorder, hypereosinophilic syndrome, eosinophilia
54 clinical trials for this condition and its sub-types.
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Broader categories
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Asthma breakthrough? new study tests cutting back on meds with benralizumab
Disease control CompletedThis Phase 3b study is testing whether the drug benralizumab (Fasenra) can allow people with severe eosinophilic asthma to safely reduce their daily maintenance medications. About 504 participants aged 12-75 in China will try to step down from drugs like inhaled steroids or long-…
Phase: PHASE3 • Sponsor: AstraZeneca • Aim: Disease control
Last updated Aug 15, 2026 00:00 UTC
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New hope for kids with rare blood disorder: drug may cut flares and steroid use
Disease control CompletedThis study tested the drug mepolizumab in 16 children aged 6 to 17 with hypereosinophilic syndrome (HES), a rare condition causing too many eosinophils (a type of white blood cell). The goal was to see if mepolizumab could reduce disease flares and lower the need for steroids ove…
Phase: PHASE3 • Sponsor: GlaxoSmithKline • Aim: Disease control
Last updated Jul 08, 2026 00:00 UTC
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New COPD treatment cuts hospital returns in severe cases
Disease control CompletedThis study tested whether a drug called mepolizumab, given after a severe COPD flare-up that required hospital care, could prevent future hospital stays or death. It involved 238 adults with eosinophilic COPD (a type with high levels of certain white blood cells). Participants re…
Phase: PHASE2, PHASE3 • Sponsor: University of Leicester • Aim: Disease control
Last updated Jun 27, 2026 12:23 UTC
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New asthma drug shows promise in real-world greek study
Disease control CompletedThis study followed 152 adults in Greece with severe eosinophilic asthma who were starting benralizumab, a medication that helps control severe asthma. Researchers measured not only standard asthma control but also quality of life, sleep, mood, and physical activity using wearabl…
Sponsor: AstraZeneca • Aim: Disease control
Last updated Jun 27, 2026 12:08 UTC
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Asthma drug benralizumab put to the test in everyday life
Disease control CompletedThis study looked at how well benralizumab (Fasenra) works for people with severe eosinophilic asthma in real-world clinics across the Gulf, Latin America, and India. Researchers tracked 291 patients to see if their asthma control improved over time using a standard questionnaire…
Sponsor: AstraZeneca • Aim: Disease control
Last updated Jun 27, 2026 11:00 UTC
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Air purifiers put to the test for COPD relief
Disease control CompletedThis study looked at whether using a HEPA air purifier at home can improve lung health in adults with a type of COPD called eosinophilic COPD. 178 people took part, with half getting real purifiers and half getting fake ones. The main goal was to see if the purifiers helped with …
Phase: NA • Sponsor: Beth Israel Deaconess Medical Center • Aim: Disease control
Last updated Jun 27, 2026 09:11 UTC
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Real-world study confirms mepolizumab cuts asthma attacks and steroid use
Disease control CompletedThis study followed 106 adults with severe eosinophilic asthma in Poland who received mepolizumab injections every 4 weeks for at least a year. Researchers tracked asthma attacks and the need for oral steroids before and during treatment. The goal was to see if the drug helps con…
Sponsor: Medical University of Lodz • Aim: Disease control
Last updated Jun 27, 2026 09:00 UTC
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Could dupilumab help Hard-to-Treat asthma patients?
Disease control CompletedThis study looked at whether dupilumab, a drug that blocks certain immune signals, can reduce signs of autoimmunity in the airways of people with severe asthma. 30 patients were followed for 4 months. The goal was to see if this approach could help those who don't get better with…
Sponsor: McMaster University • Aim: Disease control
Last updated Jun 27, 2026 08:09 UTC
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Drug dasatinib tested for rare blood cancers
Disease control CompletedThis study tested the drug dasatinib in 68 adults with several types of blood and bone marrow disorders, including certain leukemias, myelofibrosis, and mastocytosis. The goal was to see if dasatinib could help control the disease and to check its safety. Participants took dasati…
Phase: PHASE2 • Sponsor: M.D. Anderson Cancer Center • Aim: Disease control
Last updated Jun 27, 2026 08:07 UTC
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Nasal spray shows promise for tough asthma in early trial
Disease control CompletedThis study tested an experimental nasal spray called AD17002 in 40 adults with poorly controlled moderate-to-severe eosinophilic asthma. Participants self-administered the spray twice a week for six weeks. The goal was to see if it could improve lung function and reduce the need …
Phase: PHASE1, PHASE2 • Sponsor: Advagene Biopharma Co. Ltd. • Aim: Disease control
Last updated Jun 26, 2026 16:35 UTC
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Beyond breathing: could an asthma drug lift emotional burdens for patients and partners?
Knowledge-focused CompletedThis study looks at how mepolizumab (Nucala), a treatment for severe eosinophilic asthma, impacts emotions and mental well-being in patients and their partners. Researchers will track changes in feelings like anxiety, depression, and stress using questionnaires and interviews. Th…
Sponsor: University Hospital Southampton NHS Foundation Trust • Aim: Knowledge-focused
Last updated Jul 15, 2026 00:00 UTC
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New algorithm aims to speed up diagnosis of mysterious high white blood cell counts
Knowledge-focused CompletedThis study tested a decision algorithm to help doctors diagnose the cause of eosinophilia (high levels of a type of white blood cell). The algorithm guides which tests to do and in what order. Researchers enrolled 53 patients and measured how many followed the algorithm correctly…
Phase: NA • Sponsor: University Hospital, Limoges • Aim: Knowledge-focused
Last updated Jun 27, 2026 14:03 UTC
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Blood cell study may personalize asthma and sinusitis treatment
Knowledge-focused CompletedThis study looked at different types of immune cells (eosinophils) in the blood of people with asthma, chronic sinusitis with nasal polyps, or both, compared to healthy volunteers. The goal was to find patterns that could help doctors choose the best targeted therapy for each pat…
Sponsor: University Hospital, Lille • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:33 UTC
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Asthma Drug's gene secrets revealed in small study
Knowledge-focused CompletedThis study looked at how the asthma drug mepolizumab affects gene activity in adults with severe eosinophilic asthma. Researchers took blood samples from 20 participants before and after 12 weeks of treatment to see which genes changed. The goal was to understand how the drug wor…
Sponsor: Mayo Clinic • Aim: Knowledge-focused
Last updated Jun 27, 2026 11:03 UTC
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New clues to spot a rare blood disorder
Knowledge-focused CompletedThis study looked for new biological markers to help diagnose hypereosinophilic syndrome (HES), a rare condition where too many eosinophils (a type of white blood cell) cause damage. Researchers compared blood samples from 41 people with HES, those with other causes of high eosin…
Phase: NA • Sponsor: University Hospital, Lille • Aim: Knowledge-focused
Last updated Jun 27, 2026 08:09 UTC
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Asthma Drug's hidden effects revealed in small study
Knowledge-focused CompletedThis study looked at how mepolizumab, a biologic drug, changes inflammation in people with severe eosinophilic asthma. Researchers measured immune and metabolic markers in the nose, lungs, and blood of 15 adults. The goal was to better understand the drug's full impact beyond jus…
Sponsor: Istituti Clinici Scientifici Maugeri SpA • Aim: Knowledge-focused
Last updated Jun 27, 2026 08:03 UTC