Double-blind, Multiple Dose Study of Tezepelumab (AMG 157) in Adults With Mild Atopic Asthma

Amgen31 enrolled

Overview

The purpose of this study is to assess the late and early asthmatic response after an allergen inhalation challenge in adults with mild atopic asthma after receiving multiple doses of tezepelumab (AMG 157), as well as the safety, tolerability, immunogenicity, and pharmacokinetics of multiple doses of tezepelumab in adults with mild atopic asthma.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

QUADRUPLE

Enrollment

Conditions

Asthma

Interventions

PlaceboDRUG

Administered in a 1-hour intravenous infusion

TezepelumabBIOLOGICAL

Administered in a 1-hour intravenous infusion

Eligibility

Sex: ALLMin age: 18 YearsMax age: 60 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Male or female subjects with history of mild atopic asthma between 18 and 60 years-of-age * Body mass index (BMI) between 18 and 35 kg/m\^2 * Normal or clinically acceptable physical examination (PE), clinical laboratory values, and electrocardiogram (ECG); clinically acceptable PE includes history of mild atopic asthma * Used only inhaled short-acting β2-agonists infrequently to treat asthma * No current exposure to allergens to which subject experiences asthmatic responses * No other lung disease, exacerbations of asthma or lower respiratory tract infections for at least 6 weeks prior to screening * Positive skin prick test to common aeroallergens at screening * Additional inclusion criteria apply Exclusion Criteria: * History or evidence of a clinically significant disorder (including psychiatric), condition or disease that would pose a risk to subject safety or interfere with the study evaluation, procedures or completion; * History or current medical conditions that are contraindicated for methacholine challenge, such as myocardial infarction or stroke within previous 3 months, known cardiac disease, uncontrolled hypertension and aortic or cerebral aneurysm * Evidence of active or suspected bacterial, viral, fungal or parasitic infections within past 6 weeks * Subject has know type I/II diabetes * History of residential exposure to tuberculosis or has a positive purified protein derivative (PPD) or QuantiFERON test within 4 weeks before randomization * Subject who has history of malignancy of any type within 5 years prior to enrollment * Subjects tested positive for drugs/alcohol or nicotine use at screening * Subjects tested positive for human immunodeficiency virus (HIV), hepatitis B or hepatitis C * Additional exclusion criteria apply

Locations (5)

Research Site

Calgary, Alberta, Canada

Research Site

Vancouver, British Columbia, Canada

Research Site

Hamilton, Ontario, Canada

Research Site

Sainte-Foy, Quebec, Canada

Research Site

Outcomes

Primary Outcomes

Maximum Percentage Decrease in Forced Expiratory Volume in 1 Second (FEV1) at 3 to 7 Hours Post Allergen Challenge

Participants underwent allergen inhalation challenge on study days 42 and 84 to induce airway bronchoconstriction (measured by a fall in FEV1). FEV1 was measured prior to the challenge and between 3 to 7 hours post allergen challenge to assess late asthmatic response (LAR). The percent change in FEV1 from pre-challenge was calculated to each time point between 3 to 7 hours post challenge. The maximum percent decrease in FEV1 from pre-allergen challenge is the percent change in FEV1 representing the largest percentage decrease (or minimum percentage increase) from pre-allergen challenge FEV1 during late (3-7 hour) asthmatic response time frame.

Time frame: Days 42 and 84 at pre-allergen challenge and at 180, 240, 300, 360, and 420 minutes (3-7 hours) post allergen challenge

Time-Adjusted Area Under the Curve for the Percent Decrease From Pre-Allergen Challenge in Forced Expiratory Volume in 1 Second (FEV1) From 3 to 7 Hours Post Allergen Challenge

Participants underwent allergen inhalation challenge on study days 42 and 84 to induce airway bronchoconstriction. FEV1 was measured prior to the challenge and between 3 to 7 hours post challenge to assess late asthmatic response (LAR). The percent change in FEV1 from pre-challenge was calculated to each time point between 3 to 7 hours post challenge. The area under the curve for the percent change at each time point was calculated using the linear trapezoidal rule, then time adjusted by dividing by the length of time over which the AUC was calculated.

Time frame: Days 42 and 84 at pre-challenge and at 180, 240, 300, 360, and 420 minutes (3-7 hours) post challenge

Secondary Outcomes

Number of Participants With Adverse Events

A serious adverse event is defined as an adverse event that meets at least 1 of the following serious criteria: * fatal, * life-threatening, * requires in-patient hospitalization or prolongation of existing hospitalization, * results in persistent or significant disability/incapacity, * congenital anomaly/birth defect, and/or * other medically important serious event. The severity of each adverse event was graded by the Investigator as mild, moderate, severe, life-threatening, or fatal according to the Common Terminology Criteria for Adverse Events (Version 4).

Data from ClinicalTrials.gov

This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.

Saskatoon, Saskatchewan, Canada

Time frame: Up to 169 days

Number of Participants With Grade ≥ 3 Laboratory Values

Laboratory toxicities were graded according to the Common Terminology Criteria for Adverse Events (Version 4) on a scale from grade 1 (mild) to 5 (death).

Time frame: Up to 169 days

Number of Participants Who Developed Anti-tezepelumab Antibodies After Initiation of Treatment

All study samples (tezepelumab and placebo) were tested using an electrochemiluminescence (ECL) based immunoassay to detect and confirm the presence of antibodies capable of binding to tezepelumab. Samples identified as positive in the immunoassay were tested in a receptor-binding ECL-based assay to detect neutralizing or inhibitory effects toward tezepelumab. The number of participants with positive anti-tezepelumab binding antibodies / neutralizing antibodies at any time post-baseline with a negative or no result at baseline is reported.

Time frame: Days 29, 57, 85, 113, and 169

Maximum Percentage Decrease in FEV1 From 0 to 2 Hours Post Allergen Challenge

Participants underwent allergen inhalation challenge on study days 42 and 84 to induce airway bronchoconstriction. FEV1 was measured prior to the challenge and between 0 to 2 hours post challenge to assess early asthmatic response (EAR). The maximum percent decrease in FEV1 from pre-allergen challenge is the percent change in FEV1 representing the largest percentage decrease (or minimum percentage increase) from pre-allergen challenge FEV1 during early (0-2 hour) asthmatic response time frame.

Time frame: Days 42 and 84 at pre-allergen challenge and at 10, 20, 30, 45, 60, 90, and 120 minutes (0-2 hours) post allergen challenge

Time-Adjusted AUC for the Percent Decrease From Pre-Allergen Challenge in FEV1 From 0 to 2 Hours Post Allergen Challenge

Participants underwent allergen inhalation challenge on study days 42 and 84 to induce airway bronchoconstriction. FEV1 was measured prior to the challenge and between 0 to 2 hours post challenge to assess early asthmatic response (EAR). The percent change in FEV1 from pre-allergen challenge was calculated to each time point between 0 to 2 hours post challenge. The area under the curve for the percent change at each time point was calculated using the linear trapezoidal rule, then time adjusted by dividing by the length of time over which the AUC was calculated.

Time frame: Days 42 and 84 at pre-challenge and at 10, 20, 30, 45, 60, 90, and 120 minutes (0-2 hours) post challenge

Minimum FEV1 From 0 to 2 Hours Post Allergen Challenge

Time frame: Days 42 and 84 at 10, 20, 30, 45, 60, 90, and 120 minutes (0-2 hours) post allergen challenge

Time-Adjusted AUC for FEV1 From 0 to 2 Hours Post Allergen Challenge

Participants underwent allergen inhalation challenge on study days 42 and 84 to induce airway bronchoconstriction. FEV1 was measured prior to the challenge and between 0 to 2 hours post challenge to assess early asthmatic response (EAR). The area under the curve for the FEV1 between 0 to 2 hours post allergen challenge was calculated using the linear trapezoidal rule, then time adjusted by dividing by the length of time over which the AUC was calculated.

Time frame: Days 42 and 84 at pre-challenge and at 10, 20, 30, 45, 60, 90, and 120 minutes (0-2 hours) post challenge

Minimum FEV1 From 3 to 7 Hours Post Allergen Challenge

Participants underwent allergen inhalation challenge on study days 42 and 84 to induce airway bronchoconstriction. FEV1 was measured prior to the challenge and between 3 to 7 hours post challenge to assess late asthmatic response (LAR). The minimum FEV1 post allergen challenge for LAR is defined as the smallest value of FEV1 measured during 3 to 7 hours post allergen challenge.

Time frame: Days 42 and 84 at 180, 240, 300, 360, and 420 minutes (3-7 hours) post allergen challenge

Time-Adjusted AUC for FEV1 From 3 to 7 Hours Post Allergen Challenge

Participants underwent allergen inhalation challenge on study days 42 and 84 to induce airway bronchoconstriction. FEV1 was measured prior to the challenge and between 3 to 7 hours post allergen challenge to assess late asthmatic response (LAR). The area under the curve for the FEV1 between 3 to 7 hours post allergen challenge was calculated using the linear trapezoidal rule, then time adjusted by dividing by the length of time over which the AUC was calculated.

Time frame: Days 42 and 84 at pre-challenge and at 180, 240, 300, 360, and 420 minutes (3-7 hours) post challenge.

Maximum Observed Serum Concentration (Cmax) of Tezepelumab

The PK parameter Cmax was estimated based on the serum concentrations of tezepelumab using noncompartmental methods. The concentration of tezepelumab in human serum was measured using a validated ELISA. The lower limit of quantification of the assay was 10 ng/mL.

Time frame: First dose: Day 1 at predose and 1 and 4 hours postdose, and days 4, 8, 15, and 29 (predose); Last dose: Day 57 predose, 1 and 4 hours postdose, and at days 60, 64, 71, 83, 84, 85, 113, and 169.

Time of Maximum Observed Concentration (Tmax) of Tezepelumab

The PK parameter Tmax was estimated based on the serum concentrations of tezepelumab using noncompartmental methods. The concentration of tezepelumab in human serum was measured using a validated ELISA. The lower limit of quantification of the assay was 10 ng/mL.

Minimum Observed Serum Concentration (Cmin) of Tezepelumab

The PK parameter Cmin was estimated based on the serum concentrations of tezepelumab using noncompartmental methods. The concentration of tezepelumab in human serum was measured using a validated ELISA. The lower limit of quantification of the assay was 10 ng/mL.

Area Under the Concentration-time Curve Over the Dosing Interval (AUCtau) for Tezepelumab

The PK parameter AUCtau was estimated based on the serum concentrations of tezepelumab using noncompartmental methods. The dosing interval (tau) was 28 days. The concentration of tezepelumab in human serum was measured using a validated ELISA. The lower limit of quantification of the assay was 10 ng/mL.

Time frame: First dose: Day 1 at predose and 1 and 4 hours postdose and days 4, 8, 15, and 29 (predose); Last dose: Day 57 predose, 1 and 4 hours postdose, and at days 60, 64, 71, 83, 84, and 85.

Accumulation Ratio Based on AUCtau

Accumulation ratio (AR) based on AUCtau was calculated as AUCtau after last dose / AUCtau after first dose.

Time frame: First dose: Day 1 at predose and 1 and 4 hours postdose and days 4, 8, 15, and 29 (predose); Last dose: Day 57 predose, 1 and 4 hours postdose, and at days 60, 64, 71, 83, 84, and 85.

Accumulation Ratio Based on Cmax

Accumulation ratio based on Cmax calculated as Cmax after last dose / Cmax after first dose.

Area Under the Concentration-time Curve From Time Zero to Infinity (AUCinf) After Last Dose for Tezepelumab

The PK parameter AUCinf was estimated based on the serum concentrations of tezepelumab using noncompartmental methods. The concentration of tezepelumab in human serum was measured using a validated ELISA. The lower limit of quantification of the assay was 10 ng/mL.

Time frame: Day 57 predose, 1 and 4 hours postdose, and at days 60, 64, 71, 83, 84, 85, 113, and 169.

Terminal Half-life (t1/2z) of Tezepelumab After Last Dose

The PK parameter t1/2,z was estimated based on the serum concentrations of tezepelumab using noncompartmental methods. The concentration of tezepelumab in human serum was measured using a validated ELISA. The lower limit of quantification of the assay was 10 ng/mL.

Time frame: Day 57 predose, 1 and 4 hours postdose, and at days 60, 64, 71, 83, 84, 85, 113, and 169.