A Multicentre, Randomised, Double-Blind, Parallel-Group Placebo-Controlled, Phase 3, Efficacy and Safety Study of Tezepelumab in 5 to < 12 Year Old Children With Severe Uncontrolled Asthma (HORIZON)

JRCT ID: jRCT2071230072

Registered date:07/10/2023

Basic Information

• Recruitment status: Recruiting
• Health condition(s) or Problem(s) studied: severe uncontrolled asthma
• Date of first enrollment: 18/01/2024
• Target sample size: 372
• Countries of recruitment: Philippines,Japan,China,Japan,Poland,Japan,Netherlands,Japan,Spain,Japan,France,Japan,Colombia,Japan,Argentina,Japan,Canada,Japan,Mexico,Japan,United States,Japan
• Study type: Interventional
• Intervention(s): Participants will be randomized in a 2:1 ratio to either tezepelumab or matching placebo both administered subcutaneously

Outcome(s)

Primary Outcome

Annualized asthma exacerbation rate (AAER) [ Time Frame: From Baseline to Week 52 ]
To assess the effect of tezepelumab on severe asthma exacerbations in children 5 to < 12 years old with severe uncontrolled asthma compared with placebo.

Key inclusion & exclusion criteria

• Age minimum: >= 5age old
• Age maximum: < 12age old
• Gender: Both

Include criteria

1. Written informed consent from (ICF) at least one parent/caregiver (as per local guidelines) and accompanying informed assent from the participant (where the participant is able to provide assent) prior to admission to the study.

2. Participants must be 5 to < 12 years of age, at the time of signing the assent form (as applicable per local guidelines) and their caregivers signing the ICF and at Visit 3.

3. Documented physician diagnosis of severe asthma for at least 6 months prior to Visit 1.

4. Documented physician-prescribed treatment with a total daily dose of either medium or high dose, for at least 3 months with stable dose more 1 month prior to Visit 1.

5. Documented treatment with at least one additional maintenance asthma controller medication is required according to local guidelines and standard of care; (long-acting beta agonist, leukotriene receptor antagonist, long-acting muscarinic antagonist) for at least 3 months with stable dose more 1 month prior to Visit 1.

6. Evidence of asthma as documented by one of the following:

-Documented historical BD responsiveness of FEV1 more 10% in the previous 12 months prior to Visit 1 OR

-Documented historical methacholine challenge result of less 16 mg/mL in the previous 12 months prior to Visit 1 OR

-Post-BD (albuterol/salbutamol) responsiveness of FEV1 more 10% during Screening (15 to 30 min after administration of 4 puffs of albuterol/salbutamol) at either Visit 1 or Visit 2.

7. History of at least 2 severe asthma exacerbation events OR 1 severe asthma exacerbation event resulting in hospitalisation within 12 months prior to Visit 1.

8. Pre-BD FEV-1 >50% and less 95%PN OR FEV1/forced vital capacity (FVC) ratio less 0.8 at either Visit 1 or Visit 2.

9. Evidence of uncontrolled asthma, with at least 1 of the below criteria:

-ACQ-IA score more 1.5 at least once during Screening/Run-in, including Visit 3 (prior to Randomisation) for participants more 6 years old at Screening

-Use of reliever medication, other than as a preventive for exercise induced bronchospasm, on 3 or more days per week for at least 1 week during the Screening/Run-in period

-Sleep awakening due to asthma symptoms requiring use of reliever medication at least once during the Screening/Run-in period

-Asthma symptoms 3 or more days per week in at least 1 week during the Screening/Run-in period

10. Body weight more 16 kg at Visit 1 (Screening) and Visit 3 (Randomisation).

Exclude criteria

1. History of cystic fibrosis, primary ciliary dyskinesia, or chronic rhinosinusitis with nasal polyposis.

2. History of any clinically significant disease or disorder other than asthma which, in the opinion of the investigator, may either put the participant at risk because of participation in the study, or influence the results or the participant's ability to participate in the study.

3. History of a clinically significant deterioration in asthma or asthma exacerbation including those requiring use of systemic corticosteroids or increase in the maintenance dose of oral corticosteroids within 30 days prior to Visit 1.

4. Change in ICS dose within 1 month prior to Visit 1.

5. History of a life-threatening asthma exacerbation resulting in a hypoxic seizure or requiring intubation or mechanical ventilation.

Related Information

• Primary Sponsor: Hibi Kazushige
• Secondary ID(s): NCT06023589