Mepolizumab in Episodic Angioedema With Eosinophilia

Study Results

Results available

Outcome measurements, participant flow, baseline characteristics, and adverse events have been published for this study.

View full results

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

TERMINATED

Clinical Phase

PHASE2

Total Enrollment

5 participants

Study Classification

INTERVENTIONAL

Study Start Date

2021-01-14

Study Completion Date

2022-10-31

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

Background:

Gleich syndrome is also called episodic angioedema with eosinophilia (EAE). People with EAE have episodes of swelling. They may also have itching, hives, fever, and weight gain. During episodes, the body has very high numbers of white blood cells, especially a kind called eosinophils. Researchers think a drug called mepolizumab could help.

Objective:

To see if mepolizumab causes EAE symptoms to be less severe and happen less often.

Eligibility:

People ages 18 or older with EAE.

Design:

Participants will be screened under NIH protocol 94-I-0079.

Participants will have 8 visits over about 6 months. The timing of some visits will depend on each participant s EAE episodes. Visits will include:

* Medical history
* Physical exam
* Blood and urine tests
* Optional bone marrow collection at first or second visit. For this, a needle will be inserted through the participant s hip bone into the marrow.

Participants will get mepolizumab 3 times over about 3 months. They will get their first dose when their eosinophils are at their lowest point. They will get the drug by IV. A needle will guide a thin plastic tube into an arm vein. The drug will be given through the tube over about 30 minutes.

Participants will keep a daily online log for about 3 months. The log will track their weight, temperature, and EAE symptoms. During the whole study, they will complete 2 online questionnaires about their symptoms. They will fill out 1 daily and 1 monthly.

Participants will have blood and urine tests 2-3 times a week. For these, they will go to their local doctor.

Related Clinical Trials

Explore similar clinical trials based on study characteristics and research focus.

Intravenous Mepolizumab In Subjects With Hypereosinophilic Syndromes (HES)

NCT00086658

Hypereosinophilia Hypereosinophilic Syndrome

COMPLETED PHASE3

Efficacy and Safety Study of Mepolizumab in Subjects With Severe Hypereosinophilic Syndrome (HES)

NCT02836496

Hypereosinophilic Syndrome

COMPLETED PHASE3

Mepolizumab for Eosinophilic Fasciitis

NCT04305678

Eosinophilic Fasciitis

WITHDRAWN PHASE1

An Evaluation Of Mepolizumab In Therapy Of Eosinophilic Oesophagitis In Adult Patients

NCT00274703

Oesophagitis, Eosinophilic

COMPLETED PHASE2

Mepo for Eosinophilic Esophagitis (EoE) Study

NCT03656380

EoE Eosinophilic Esophagitis

COMPLETED PHASE2

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

Episodic angioedema with eosinophilia (EAE), also known as Gleich s Syndrome,is a rare disorder characterized by recurrent episodes of urticaria, fever, angioedema, weight gain and dramatic eosinophilia that occur at 3- to 6-week intervals and resolve with spontaneous diuresis in the absence of therapy. Although the syndrome is often classified in the broad category of idiopathic hypereosinophilic syndrome (HES), EAE is a distinct eosinophilic syndrome that is remarkably homogeneous in clinical presentation. More recently, it has become apparent that there is multilineage cycling, involving lymphocytes and neutrophils in addition to eosinophils. Early studies described cyclic elevations of serum interleukin 5 (IL-5) preceding the rise in eosinophilia, and additional studies have shown cyclic elevations in other type II cytokines as well as in eosinophilic chemokines. Aberrant T cells with a CD3-CD4+ surface phenotype have also been detected in the majority of subjects with EAE. The cyclic nature of the disorder and the involvement of multiple cell lineages have made it difficult to determine the underlying cause of EAE.

We hypothesize that IL-5 driven eosinophilia is central to the pathogenesis of EAE. Suppression of eosinophil cycling by blocking IL-5 would help determine whether eosinophils are indeed the main drivers of the symptoms of angioedema and urticaria and pave the way for future mechanistic studies investigating the etiology of this unusual disorder. The purpose of this pilot study is to evaluate the effect of mepolizumab, a humanized antibody to IL-5, on eosinophil cycling in 12 subjects with EAE. Subjects with EAE will undergo screening on the National Institutes of Health protocol 94-I-0079 to establish the periodicity of their cycling (if not previously determined) and the optimal timing for the baseline visit. After screening, subjects will be followed closely with signs and symptoms recorded in a daily log and daily and monthly questionnaires, as well as complete blood counts and research blood collected for one cycle prior to administration of mepolizumab. Subjects will receive a total of 3 monthly administrations of mepolizumab at 700 mg, followed by drug de-escalation over 6 additional monthly administrations for subjects who demonstrate benefit from mepolizumab. All subjects will have a follow-up visit about 1 month after the last study administration of mepolizumab.

The primary efficacy endpoint will be reduction of symptoms and severity of symptoms after mepolizumab. Secondary endpoints will include reduction in peak eosinophils after mepolizumab, continued suppression of absolute eosinophil count and reduction in symptoms following monthly dosing of mepolizumab therapy.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Eosinophilia Angioedema

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

Review each arm or cohort in the study, along with the interventions and objectives associated with them.

Active treatment

Participants with episodic angioedema with eosinophilia (EAE) received mepolizumab 700 mg intravenously monthly for three doses.

Group Type EXPERIMENTAL

mepolizumab

Intervention Type BIOLOGICAL

Mepolizumab is a fully humanized monoclonal antibody (IgG1, kappa mAb) supplied as 100 mg of lyophilized powder in sterile, single-dose vials. Mepolizumab 100 mg vials were reconstituted according to the manufacturer, for a total dose of 700mg administered as intravenous infusion.

Interventions

Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.

mepolizumab

Mepolizumab is a fully humanized monoclonal antibody (IgG1, kappa mAb) supplied as 100 mg of lyophilized powder in sterile, single-dose vials. Mepolizumab 100 mg vials were reconstituted according to the manufacturer, for a total dose of 700mg administered as intravenous infusion.

Intervention Type BIOLOGICAL

Other Intervention Names

Discover alternative or legacy names that may be used to describe the listed interventions across different sources.

Nucala

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

A subject will be eligible for participation in the study only if all of the following criteria apply:

1. The subject is male or female, aged 18 years or older.
2. The subject has a documented diagnosis of EAE.
3. The subject has symptoms of EAE in the cycle prior to screening, including but not limited to fever, swelling, hives or rashes, weight gain, muscle pain, and lymphadenopathy.
4. Cycling of eosinophils is ongoing as indicated by a peak absolute eosinophil count (AEC) greater than or equal to 1500/mm\^3 during at least one cycle in the prior 3 months.
5. If taking corticosteroids, the subject is able and willing to stay on a stable dose for 6 weeks prior to screening.
6. The subject agrees to storage of study samples.
7. The subject is able to provide informed consent.
8. Females are eligible for this study if they are:

* of non-childbearing potential (i.e., women who have had a hysterectomy or tubal ligation or are postmenopausal as defined by no menses in 1 year); OR
* of childbearing potential but willing to practice effective contraception or abstinence during administration of the study drug and for 100 days (5 terminal half-lives) after administration of the study drug.
* Not breastfeeding.

Participation of Women:

Pregnancy: The effects of mepolizumab on the developing human fetus are unknown. For this reason, women of childbearing potential must agree to use adequate contraception (see below for acceptable methods) prior to study entry, for the duration of study participation, and for \>5 terminal half-lives (approximately 100 days) after administration of the last dose of study drug. Nonreproductive potential is defined as post-menopausal, male partner who has azoospermia or is surgically sterile (at least 6 weeks before screening) and is the sole sexual partner, surgical sterility, or a congenital or acquired condition that definitely prevents conception. Further, postmenopausal is defined as at least 12 consecutive months with no menses at age 50 or older, or a high follicle-stimulating hormone level in the postmenopausal range at ages 45-50 years in subjects not using hormonal contraception or hormone replacement therapy.

Females with reproductive potential must either practice complete and uninterrupted abstinence from heterosexual activity or use 2 of the following methods of contraception with their partners. The 2 methods must include either 2 barrier methods, or 1 barrier method and 1 non-barrier method, both of which must be consistently used:

Barrier Methods:

1. Diaphragm with spermicide
2. Cervical cap with spermicide or contraceptive sponge (for nulliparous subjects only)
3. Male or female condom (cannot be used together)

Non-Barrier Methods

1. An intrauterine device with a documented failure rate of \<1%
2. Hormonal contraception: pill (estrogen/progestin or progestin-only), patch, vaginal ring, rod implanted in the skin, or subcutaneous injection methods

Females of childbearing-potential must have a negative pregnancy test result prior to receiving mepolizumab at each on-site study visit. During the course of the study, if a woman becomes pregnant or suspects she is pregnant, she should inform the study staff and her primary care physician immediately. A pregnancy registry has been created for subjects who become pregnant while receiving the approved dose of mepolizumab (100 mg subcutaneous injection) for asthma.

Fertility: There is no fertility data in humans. Animal studies showed no adverse effects of anti-IL-5 treatment on fertility.

Exclusion Criteria

A subject will not be eligible to participate in the study if any of the following conditions are fulfilled at the time of screening:

1. Treatment with immunosuppressive or immunomodulatory agents including but not limited to cyclosporine, interferon-alpha, azathioprine, methotrexate, and cyclophosphamide within the past 3 months.
2. Treatment with biologics including but not limited to mepolizumab, IVIG, anti-TNF agents, rituximab, benralizumab, alemtuzumab, reslizumab, dupilumab, lebrikizumab, and omalizumab within 6 months or 5 half-lives (whichever is longer). Subjects who received rituximab at any time in the past must have normal B-cell numbers to participate.
3. Co-morbid illness, alcohol or substance abuse, or any other condition (e.g., HIV, active hepatitis) that, in the opinion of the investigator, places the subject at undue risk by participating in the study.
4. Treatment with a daily dose of corticosteroids \>40 mg.

Co-enrollment Guidelines: Co-enrollment in other trials is restricted, other than enrollment on observational studies or those evaluating the use of a licensed medication. Study staff should be notified of co-enrollment as it may require the approval of the investigator.

Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No