New asthma drug shows promise in small trial
NCT ID NCT05280418
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tested tezepelumab, a monoclonal antibody, in 27 adults with uncontrolled moderate-to-severe asthma. The goal was to see if it improves lung function and reduces airway inflammation and blockages. Participants received either tezepelumab or a placebo, and researchers used advanced imaging to measure changes over 16 weeks.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- tezepelumab (a monoclonal antibody)
- What this could lead to
- If successful, this could lead to a new treatment option that improves lung function and reduces airway blockages in people with uncontrolled asthma.
- What could go wrong
- This is a small, early-stage study with only 27 participants, so results may not apply to everyone. The drug may not show significant benefits over placebo.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
-
27 people
The number who actually took part.
- Started
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Nov 2022
- Finished
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Dec 2025
- Lead sponsor
-
Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * General * Able and willing to provide written informed consent. * Able and willing to comply with the study protocol. * Males and females ≥ 18 years of age. * Asthma-related * Asthma diagnosed by a respiratory physician ≥12 months prior to study enrolment based on the Global Initiative for Asthma (GINA) 2021 guidelines. * ACQ ≥1.5 at screening. * Methacholine PC20 ≤ 4 mg/mL OR ≥15% decrease in FEV1 during saline inhalation for sputum induction OR ≥15% improvement in FEV1 after bronchodilator during the screening period. * Criteria met for moderate or severe asthma defined by GINA 2021 guidelines, i.e. treatment with low, medium or high dose ICS (\<250 mcg, 251 - 500 mcg, \>500 mcg of fluticasone equivalent/day respectively) plus another controller. Patients on prednisone would not be excluded, as long as they meet the rest of the inclusion criteria. * FeNO \>25 ppb OR ≥3% sputum eosinophils (preferred) OR blood eos ≥300/µL during the screening period. * History of ≥1 exacerbation in the previous year. Exclusion Criteria: * General \-- Participation in any clinical trial of an investigational agent or procedure within six months prior to screening or during the study. * Medical conditions and treatment history * History of anaphylaxis to any previous biologic therapy received. * Receipt of live attenuated vaccine within 30 days, receipt of COVID vaccine within 28 days, known or suspected COVID infection at the time of enrollment. * Acute or chronic parasitic, bacterial, fungal or viral infections that required, or currently requires, hospitalization or antimicrobial treatment during the last four weeks. * Acute asthma exacerbation event treated with increased doses of oral, or any dose of intramuscular (IM) or intravenous (IV) corticosteroids within six weeks prior to screening. * Other relevant pulmonary diseases (e.g. chronic obstructive pulmonary disease, idiopathic pulmonary fibrosis, cystic fibrosis, pulmonary arterial hypertension, tuberculosis) requiring treatment within 12 months prior to screening. * Alcohol or substance abuse within 12 months prior to screening. * Current smoker defined as having smoked at least one cigarette (or pipe, cigar, or marijuana) per day for ≥ 30 days within the three months prior to screening. * Ex-smokers with ≥ 10 pack-year smoking history. * Pregnancy. * Treatment with anti-IgE, anti-IL-4, anti-IL-5, or anti-IL-13 targeted therapy currently or within three months prior to screening. * MRI-related * Patient has an implanted mechanically, electrically or magnetically activated device or any metal in their body which cannot be removed, including but not limited to pacemakers, neurostimulators, biostimulators, implanted insulin pumps, aneurysm clips, bioprosthesis, artificial limb, metallic fragment or foreign body, shunt, surgical staples (including clips or metallic sutures and/or ear implants) (at the discretion of the MRI Technologist). * In the investigator's opinion, subject suffers from any physical, psychological or other condition(s) that might prevent performance of the MRI, such as severe claustrophobia.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Firestone Institute for Respiratory Health
Hamilton, Ontario, L8N 4A6, Canada
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