Study to Assess the Efficacy and Safety of Atuliflapon in Moderate-to-Severe Uncontrolled Asthma - FLASH

Exclusion Criteria

• - A severe asthma exacerbation within 8 weeks of screening visit 1.
• - A positive test result of an approved antigen test (confirmed by a positive RT-PCR test) or a positive RT-PCR test for SARS-CoV-2, the virus responsible for COVID-19, at screening Visit 1 or at Visit 2 for the PK Lead-in cohort. For Part 1 and Part 2 the testing will be done at Visit 3. Results from the mandatory tests at Visit 2 (PK Lead-in cohort) and Visit 3 (Part 1, Part 2) must not be older than 48 hours and must be available before randomisation.
• - Participants with a significant COVID-19 illness within 6 months of enrolment.
• - Clinically important pulmonary disease other than asthma.
• - Any disorder, including, but not limited to, cardiovascular, gastrointestinal, hepatic, renal, neurological, musculoskeletal, infectious, endocrine, metabolic, haematological, psychiatric, or major physical impairment that is not stable.
• - Any clinically significant cardiac disease.
• - History of severe renal disease or history of creatinine clearance < 30 mL/min × m2 calculated using Cockcroft-Gault equation.
• - Severe hepatic impairment (Child-Pugh class C).
• - Previous hepatotoxicity related to zileuton or leukotriene receptor antagonist (LTRAs) (eg montelukast).
• - Participants with a recent history of, or who have a positive test for, infective hepatitis or unexplained jaundice, or participants who have been treated for hepatitis B, hepatitis C, or human immunodeficiency virus (HIV).
• - Evidence of active or untreated latent tuberculosis (TB).
• - Current or history of alcohol or drug abuse (including marijuana).
• - Current diagnosis of cancer, not including in-situ or non-melanoma skin cancer or other previous malignancies where curative therapy was completed at least 5 years prior to screening Visit 1.
• - Clinically important ongoing or previous psychiatric disease, especially suicidal behaviour, that in the opinion of the investigator might compromise the safety of the participant in the study.
• - Treatment with any serum creatinine-altering drugs within 1 month prior to screening Visit 1 including but not limited to amphotericin, cimetidine, clofibrate, dronedarone, ketoconazole, probenecid, ranolazine, trimethoprim, aminoglycosides, or cephalosporins.
• - Treatment with systemic corticosteroid use within 8 weeks (oral) or 12 weeks (intramuscular) before screening Visit 1.
• - Treatment with marketed biologics including benralizumab, mepolizumab, reslizumab, omalizumab, and dupilumab within 6 months of screening Visit 1 or 5 half-lives whichever is longer.
• - Treatment with 5-lipoxygenase inhibitors (eg zileuton or other 5-LO inhibiting supplements) within 6 weeks prior to Visit 0 and within 8 weeks prior to Visit 1).Treatment with LTRAs (eg, montelukast) within 2 weeks prior to Visit 0 and within 4 weeks prior to screening Visit 1.
• - Inhaled corticosteroid + fast-acting β2 agonist as a reliever (eg Symbicort or Fostair Maintenance and Reliever Treatment) is not allowed 15 days prior to screening Visit 1, during screening (Visit 1)/run-in and the treatment period and preferably 1 week after the last dose of study intervention.
• - Live or attenuated vaccines within 4 weeks of screening Visit 1.
• - Immunoglobulin or blood products within 4 weeks of screening Visit 1.
• - Treatment with Gemfibrozil within 4 weeks of screening Visit 1.
• - Any immunotherapy within 6 months of screening Visit 1, except for stable maintenance dose allergen-specific immunotherapy started at least 4 weeks prior to screening Visit 1 and expected to continue through to the end of the follow-up period.
• - Potent inducers/inhibitors of cytochrome P450 3A4 within 4 weeks of screening Visit 1.
• - Treatment with simvastatin, lovastatin, and atorvastatin at doses > 40 mg per day within 1 month prior to screening Visit 1. Treatment with sensitive cytochrome 3A substrates with narrow therapeutic window should be avoided from randomization to study drug.
• - For female participants on ethinyl oestradiol containing combined oral contraceptives.
• - Concurrent enrolment in another clinical study.
• - Previous participation in the current clinical study.
• - Participant treated with any investigational drug within 4 months prior to screening Visit 1.
• - Known history of allergy or reaction to any component of the study intervention formulation.
• - For female participants only: Currently pregnant or breast-feeding.
• - Smokers with smoking history of < 10 pack-years or users of vaping or e-cigarettes, must have stopped at least 6 months prior to screening Visit 1.
• - Involvement in the planning and/or conduct of the study.
• - Donation of blood (≥ 450 mL) within 3 months or donation of plasma within 14 days before screening Visit 1.
• - Major surgery within 8 weeks prior to screening Visit 1, or planned inpatient surgery, major dental procedure or hospitalisation during the screening (Visit 1), treatment or follow-up periods.