Last updated: 04/02/2026 14:30:32
Placebo-controlled efficacy and safety study of GSK3511294 (Depemokimab) in participants with severe asthma with an eosinophilic phenotypeSWIFT-1
EudraCT ID
EU CT Number
Not applicable
Trial status
Completed
Completed
Trial overview
Official title: A 52-week, randomised, double-blind, placebo-controlled, parallel-group, multi-centre study of the efficacy and safety of GSK3511294 adjunctive therapy in adult and adolescent participants with severe uncontrolled asthma with an eosinophilic phenotype
Trial description: This is a multi-center, randomized, placebo-controlled, double-blind, parallel group study that aims to assess the efficacy and safety of GSK3511294 (Depemokimab) in participants with severe uncontrolled asthma with an eosinophilic phenotype
Primary purpose:
Treatment
Trial design:
Parallel Assignment
Masking:
Double (Participant, Investigator)
Allocation:
Randomized
Primary outcomes:
Annualized Rate of Clinically Significant Exacerbations up to 52 Weeks
Timeframe: Up to Week 52
Secondary outcomes:
Change From Baseline in St. George's Respiratory Questionnaire (SGRQ) Total Score at Week 52
Timeframe: Baseline (Day 1) and Week 52
Change From Baseline in Asthma Control Questionnaire-5 (ACQ-5) Score at Week 52
Timeframe: Baseline (Day 1) and Week 52
Change From Baseline in Pre-Bronchodilator Forced Expiratory Volume in One Second (FEV1) At Week 52
Timeframe: Baseline (Day 1) and Week 52
Change From Baseline in Asthma Nighttime Symptom Diary (ANSD) Weekly Mean Score at Week 52
Timeframe: Baseline to Week 52
Change From Baseline in Asthma Daily Symptom Diary (ADSD) Weekly Mean Score at Week 52
Timeframe: Baseline to Week 52
Annualized Rate of Exacerbations Requiring Hospitalization and/or Emergency Department (ED) Visit up to 52 Weeks
Timeframe: Up to Week 52
Interventions:
Biological/vaccine: GSK3511294 (Depemokimab)
Drug: Placebo
Enrollment:
395
Observational study model:
Not applicable
Primary completion date:
2023-21-11
Time perspective:
Not applicable
Clinical publications:
David J Jackson, Michael E Wechsler, Daniel J Jackson, David Bernstein, Stephanie Korn, Paul E Pfeffer, Ruchong Chen, Junpei Saito, Gustavo de Luíz Martinez, Lucyna Dymek, Loretta Jacques, Nicholas Bird, Stein Schalkwijk, Douglas Smith, Peter Howarth, Ian D Pavord, . Twice-Yearly Depemokimab in Severe Asthma with an Eosinophilic Phenotype. The New England journal of medicine. 2024-Sep-09
PMID: 39248309
DOI: 10.1056/NEJMoa2406673
Medical condition
Asthma
Product
Not applicable
Collaborators
IQVIA
Study date(s)
March 2021 to November 2023
Type
Interventional
Phase
3
Participation criteria
Sex
Female & Male
Age
12 Years - NA
Accepts healthy volunteers
No
- Adults and adolescents greater than or equal to (>=)12 years of age, at the time of signing the informed consent/assent.
- Participants must have a documented physician diagnosis of asthma for >=2 years that meets the National Heart, Lung, and Blood Institute (NHLBI) guidelines or Global Initiative for Asthma (GINA) guidelines and
- Presence of a known pre-existing, clinically important lung condition other than asthma. This includes (but is not limited to) current infection, bronchiectasis, pulmonary fibrosis, bronchopulmonary aspergillosis, or diagnoses of emphysema or chronic bronchitis (chronic obstructive pulmonary disease other than asthma) or a history of lung cancer.
- Participants with other conditions that could lead to elevated eosinophils such as hyper-eosinophilic syndromes including (but not limited to) Eosinophilic Granulomatosis with Polyangiitis (EGPA, formerly known as Churg-Strauss Syndrome) or Eosinophilic Esophagitis.
Inclusion and exclusion criteria
Inclusion criteria:
- Adults and adolescents greater than or equal to (>=)12 years of age, at the time of signing the informed consent/assent.
- Participants must have a documented physician diagnosis of asthma for >=2 years that meets the National Heart, Lung, and Blood Institute (NHLBI) guidelines or Global Initiative for Asthma (GINA) guidelines and a) Have, or with high likelihood of having, asthma with an eosinophilic phenotype b) Have previously confirmed history of >=2 exacerbations requiring treatment with systemic corticosteroid (CS) (intramuscular [IM], intravenous [IV], or oral), in the 12 months prior to Visit 1, despite the use of medium to high-dose ICS. For participants receiving maintenance CS, the CS treatment for the exacerbations must have been a two-fold dose increase or greater.
- A pre-bronchodilator FEV1 <90% predicted (NHANES III) recorded at Visit 1 OR
- FEV1:Forced Vital Capacity (FVC) ratio <0.8 recorded at Visit 1.
- A well-documented requirement for regular treatment with medium to high dose ICS (in the 12 months prior to Visit 1 with or without maintenance OCS). The maintenance ICS dose must be >=440 micrograms (mcg) Fluticasone propionate (FP) Hydrofluoroalkane (HFA) product daily, or clinically comparable (GINA). Participants who are treated with medium dose ICS will also need to be treated with LABA to qualify for inclusion.
- Current treatment with at least one additional controller medication, besides ICS, for at least 3 months (for example [e.g.], LABA, LAMA, leukotriene receptor antagonist [LTRA], or theophylline). Key randomization inclusion criteria:
- For blood eosinophilic count: a) An elevated peripheral blood eosinophil count of >=300 cells/microliter (mcL) demonstrated in the past 12 months prior to Visit 1 that is related to asthma OR b) An elevated peripheral blood eosinophil count of >=150 cells/mcL at Screening Visit 1 that is related to asthma.
- Evidence of airway reversibility or responsiveness as documented by either: a) Airway reversibility (FEV1>=12% and 200 milliliters [mL]) demonstrated at Visit 1 or Visit 2 using the Maximum Post Bronchodilator Procedure OR b) Airway reversibility (FEV1>=12% and 200 mL) documented in the 24 months prior to Visit 2 (randomization visit) OR c) Airway hyperresponsiveness (methacholine: Provocative concentration causing a 20% fall in FEV1 [PC20] of <8 milligrams (mg)/mL, histamine: PD20 of <7.8 micromoles, mannitol: decrease in FEV1 as per the labelled product instructions) documented in the 24 months prior to Visit 2 (randomization visit).
Persistent airflow obstruction as indicated by: a) For participants >=18 years of age at Visit 1, a pre-bronchodilator FEV1 less than (<)80% predicted (The Third National Health and Nutrition Examination Survey [NHANES III]) recorded at Visit 1 b) For participants 12-17 years of age at Visit 1:
Exclusion criteria:
- Presence of a known pre-existing, clinically important lung condition other than asthma. This includes (but is not limited to) current infection, bronchiectasis, pulmonary fibrosis, bronchopulmonary aspergillosis, or diagnoses of emphysema or chronic bronchitis (chronic obstructive pulmonary disease other than asthma) or a history of lung cancer.
- Participants with other conditions that could lead to elevated eosinophils such as hyper-eosinophilic syndromes including (but not limited to) Eosinophilic Granulomatosis with Polyangiitis (EGPA, formerly known as Churg-Strauss Syndrome) or Eosinophilic Esophagitis.
- A current malignancy or previous history of cancer in remission for less than 12 months prior to screening (Participants that had localized carcinoma of the skin which was resected for cure will not be excluded).
- Cirrhosis or current unstable liver or biliary disease per investigator assessment defined by the presence of ascites, encephalopathy, coagulopathy, hypoalbuminemia, esophageal or gastric varices, persistent jaundice.
- Participants with current diagnosis of vasculitis. Participants with high clinical suspicion of vasculitis at screening will be evaluated and current vasculitis must be excluded prior to enrolment.
- Participants who have received mepolizumab (Nucala), reslizumab (Cinqair/Cinqaero), or benralizumab (Fasenra) within 12 months prior to Visit 1 or who have a previous documented failure with anti-IL-5/5 receptor (R) therapy.
- Participants who have received omalizumab (Xolair) or dupilumab (Dupixent) within 130 days prior to Visit.
- Participants who have received any monoclonal antibody (mAb) within 5 half-lives of Visit 1.
- Previously participated in any study with mepolizumab, reslizumab, or benralizumab and received study intervention (including placebo) within 12 months prior to Visit 1.
- The QT interval corrected using Fridericia’s formula (QTcF) >=450 milliseconds (msec) or QTcF >=480 msec for participants with Bundle Branch Block at screening Visit 1.
- Current smokers or former smokers with a smoking history of >=10 pack years (number of pack years = [number of cigarettes per day/20] times number of years smoked). A former smoker is defined as a participant who quit smoking at least 6 months prior to Visit 1.
- Participants with allergy/intolerance to the excipients of GSK3511294 or a any mAb or biologic. Key radomization exclusion criteria:
- QTcF >=450 msec or QTcF >=480 msec for participants with Bundle Branch Block, at randomization Visit 2 are excluded. Participants are excluded if an abnormal ECG finding from the 12-lead ECG conducted at Screening Visit 1 is considered to be clinically significant and would impact the participant’s participation during the study, based on the evaluation of the Investigator.
- Participants with a clinically significant asthma exacerbation in the 7 days prior to randomization should have their randomization visit delayed until the investigator considers the participant's asthma to be stable .
- Any changes in the dose or regimen of Baseline ICS and/or additional controller medication (except for treatment of an exacerbation) during the run-in period.
Trial location(s)
Study documents
Study report synopsis
Available language(s): English
Protocol
Available language(s): English
Statistical analysis plan
Available language(s): English
If you wish to request for full study report, please contact - [email protected]
Results overview
Results posted on ClinicalTrials.gov
Recruitment status
Completed
Actual primary completion date
2023-21-11
Actual study completion date
2023-21-11
Plain language summaries
Summary of results in plain language
Available language(s): English, Czech, French (Canadian), French, German, Italian, Polish, Russian, Chinese (Simplified), Spanish, Spanish (United States)
To view plain language summaries on trialsummaries.com click here.
Additional information about the trial
Additional information
Not applicable
Participate in clinical trial
Access to clinical trial data by researchers
Visit website