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Development of a biomarker for predicting the clinical effectiveness of tezepelumab in patients with severe asthma and elucidation of immunomodulatory effects of tezepelumab

Development of a biomarker for predicting the clinical effectiveness of tezepelumab in patients with severe asthma and elucidation of immunomodulatory effects of tezepelumab - Tokyo Asthma Study for Tezepelumab: TOAST2

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
JPRN
Registry ID
JPRN-UMIN000052764
Enrollment
65
Registered
2023-11-20
Start date
2023-11-22
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

bronchial asthma

Interventions

None listed

Sponsors

Juntendo University School of Medicine
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Subjects with refractory asthma whose asthma symptoms cannot be controlled by existing treatments and who require tezepelumab treatment under insurance according to the package insert. Subjects receiving treatment with moderate to high doses of inhaled corticosteroids plus at least one controller. Subjects who meet at least one of the following criteria at baseline: (1) At least one exacerbation of asthma has been observed within the past 2 years (2) ACQ-6 score 1.5 or higher or ACT score 20 or lower (3) FEV1 before bronchodilator administration is less than 80% of the predicted value

Exclusion criteria

Exclusion criteria: Subjects with malignancy Current smokers and subjects with a history of smoking within the past 6 months Subjects receiving treatment with other biologics and less than 1 month since last administraion (benralizumab requires 2 months) Subjects who have received bronchial thermoplasty within the past 6 months Subjects with a history of anaphylaxis due to biologics Subjects currently pregnant or breastfeeding Subjects with chronic obstructive pulmonary disease with obvious emphysematous changes Subjects with hypereosinophilic syndrome, eosinophilic granulomatosis with polyangiitis, pulmonary hypertension, sequelae of tuberculosis, diffuse panbronchiolitis, and interstitial pneumonia

Design outcomes

Primary

MeasureTime frame
Changes from baseline in the cell ratio of each peripheral blood immunocompetent cell population (eosinophils, etc.) due to tezepelumab administration up to 24 weeks of tezepelumab treatment for patients with severe asthma that is difficult to control with existing treatments.

Countries

Japan

Contacts

Public ContactNorihiro Harada

Juntendo Hospital, Juntendo University School of Medicine Department of Respiratory Medicine

nor@juntendo.ac.jp03-3813-3111

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026