E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
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E.1.1.1 | Medical condition in easily understood language |
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E.1.1.2 | Therapeutic area | Diseases [C] - Respiratory Tract Diseases [C08] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10003553 |
E.1.2 | Term | Asthma |
E.1.2 | System Organ Class | 10038738 - Respiratory, thoracic and mediastinal disorders |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To evaluate the effect of tezepelumab compared with placebo in reducing the prescribed oral corticosteroid (OCS) maintenance dose in participants with asthma requiring chronic treatment with maintenance OCS in addition to high dose inhaled corticosteroids (ICS) plus long-acting β2 agonists (LABA). |
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E.2.2 | Secondary objectives of the trial |
1) To evaluate the effect of tezepelumab compared with placebo on pre-bronchodilator lung function 2) To evaluate the effect of tezepelumab compared with placebo on the daily dose of maintenance OCS 3) To evaluate the effect of tezepelumab compared with placebo on asthma exacerbations 4) To assess the effect of tezepelumab compared with placebo on asthma control and other asthma control metrics 5) To assess the effect of tezepelumab compared with placebo on asthma related quality of life 6) To assess the effect of tezepelumab on biomarkers 7) To evaluate the pharmacokinetics (PK) of tezepelumab 8) To evaluate the immunogenicity of tezepelumab |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1) Participant must be 18 to 80 years of age 2) Participants must have received a physician-prescribed medium- or high-dose ICS for at least 12 months prior to Visit 1. 3) Participants must have received physician prescribed LABA and high dose ICS for at least 3 months prior to Visit 1. 4) Additional maintenance asthma controller medications are allowed. The use of these medications must be documented for at least 3 months prior to Visit 1. 5) Participants must have received OCS for the treatment of asthma for at least 6 months prior to Visit 1 and on a stable dose of between ≥7.5 to ≤ 30 mg (prednisone or prednisolone) daily or daily equivalent for at least 1 month prior to Visit 6) Morning pre- bronchodilator (BD) FEV1 must be < 80% predicted normal at Visit 1 or Visit 2. a) Post-BD reversibility of FEV1 ≥12% and ≥200 mL documented either in the previous 60 months prior to or at Visit 1 or at Visit 2 or at Visit 3; OR b)Airway hyperresponsiveness (methacholine: provocative concentration that causes a positive reaction [PC20] of <8 mg/mL) documented in the 60 months prior to Visit 1. 7) Blood eosinophils at Visit 1 ≥150 cells/μL or documented EOS ≥300 cells/μL within 12 months prior to Visit 1. 8) Participants must have a history of at least 1 asthma exacerbation event within 24 months prior to Visit 1. 9) Participants must have received the optimised OCS dose for at least 2 weeks prior to randomisation. |
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E.4 | Principal exclusion criteria |
1) Any clinically important pulmonary disease other than asthma 2) Any disorder that is not stable in the opinion of the Investigator and could: a. Affect the safety of the participant throughout the study; b. Influence the findings of the study or the interpretation; c. Impede the participant's ability to complete the entire duration of study 3) History of cancer: a. Participants who have had basal cell carcinoma, localised squamous cell carcinoma of the skin or in situ carcinoma of the cervix are eligible to participate in the study provided that curative therapy was completed at least 12 months prior to Visit 1; b. Participants who have had other malignancies are eligible provided that curative therapy was completed at least 5 years prior to Visit 1. 4) Asthma exacerbation, requiring use of systemic corticosteroids or increase in the maintenance dose of OCS finalized within 30 days prior to Visit 1. 5) Clinically significant infection requiring treatment with antibiotics or antiviral medications finalized < 2 weeks before Visit 1 or during the run-in period. 6) Participants with evidence of active COVID-19 infection during run-in period and optimisation 7) A helminth infection diagnosed within 6 months prior to Visit 1 that has not been treated with, or has failed to respond to, standard of care therapy. 8) A participant who is on SABA maintenance treatment within 30 days prior to Visit 1. 9) Current smokers or participants with smoking history ≥ 10 pack-years and participants using vaping products, including electronic cigarettes. Former smokers with a smoking history of <10 pack years and users of vaping or e-cigarette products must have stopped for at least 6 months prior to Visit 1 to be eligible. 10) Receipt of any marketed or investigational biologic agent within 4 months or 5 half-lives (whichever is longer) prior to Visit 1 or receipt of any investigational non-biologic agent within 30 days or 5 half-lives (whichever is longest) prior to Visit 1. 11) COVID-19 vaccination within 7 days prior to randomisation. 12) Tuberculosis requiring treatment within the 12 months prior to Visit 1. 13) During the optimisation period, asthma control reached at an OCS dose of <7.5 mg or >30 mg and/or 3 consecutive dose reductions after which asthma control was still obtained. |
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E.5 End points |
E.5.1 | Primary end point(s) |
Categorised percent reduction from baseline in the daily maintenance OCS dose at Week 28 whilst maintaining asthma control. The categories for percent change from baseline in daily OCS dose are defined as: 1. ≥90% to ≤100% reduction 2. ≥ 75% to <90% reduction 3. ≥ 50% to <75% reduction 4. >0% to <50% reduction 5. no change or any increase. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
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E.5.2 | Secondary end point(s) |
1) Change from baseline in pre-bronchodilator forced expiratory volume in 1 second (pre-BD FEV1) at Week 28. 2a) Proportion of participants with 100% reduction from baseline in daily maintenance OCS dose at Week 28 2b) Proportion of participants with daily maintenance OCS dose ≤5 mg at Week 28 2c) Proportion of participants with ≥50% reduction from baseline in daily maintenance OCS dose at Week 28 3a) Annualised asthma exacerbation rate (AAER) over 28 weeks 3b) Time to first asthma exacerbation 4a) Change from baseline in Asthma Control Questionnaire 6 (ACQ-6) score at Week 28 4b) Change from baseline Weekly mean home peak expiratory flow (PEF) (morning and evening) at Week 28 5a) Change from baseline in Standardized Asthma Quality of Life Questionnaire for 12 years and older (AQLQ(s)+12) total score at Week 28 5b) Change from baseline in St George's Respiratory Questionnaire (SGRQ) score at Week 28 6) Change from baseline in FeNO, peripheral blood eosinophils and total serum immunoglobulin E (IgE) at Week 28 7) Tezepelumab serum trough concentrations at Week 0, 12 and 28 8) Incidence of anti-drug antibodies (ADA) at Week 0, 12, 28, and 40 |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
1) Baseline to Week 28 2a) Baseline to Week 28 2b) Week 28 2c) Baseline to Week 28 3a) Baseline to Week 28 3b) Baseline to Week 28 4a) Baseline to Week 28 4b) Baseline to Week 28 5a) Baseline to Week 28 5b) Baseline to Week 28 6) Baseline to Week 28 7) Baseline, Week 12, Week 28 8) Baseline to Week 40 |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | Yes |
E.6.7 | Pharmacodynamic | Yes |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | Yes |
E.6.11 | Pharmacogenomic | Yes |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | Yes |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | Yes |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 2 |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.4.1 | Number of sites anticipated in Member State concerned | 5 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 17 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | Yes |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned |
Brazil |
Canada |
Chile |
Korea, Republic of |
Mexico |
Russian Federation |
Turkey |
United States |
Czechia |
Poland |
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E.8.7 | Trial has a data monitoring committee | No |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 3 |
E.8.9.1 | In the Member State concerned months | 1 |
E.8.9.1 | In the Member State concerned days | 21 |
E.8.9.2 | In all countries concerned by the trial years | 3 |
E.8.9.2 | In all countries concerned by the trial months | 1 |
E.8.9.2 | In all countries concerned by the trial days | 21 |