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Mepolizumab Steroid-Sparing Study in Subjects With Severe Refractory Asthma

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
GlaxoSmithKline
ClinicalTrials.gov Identifier:
NCT01691508
First received: September 20, 2012
Last updated: August 21, 2014
Last verified: July 2014
  Purpose

This is a randomised, double-blind, placebo-controlled, parallel-group, multicenter study of mepolizumab in comparison with placebo in reducing Oral Corticosteroid (OCS) use in subjects with severe refractory asthma. The study consists of four phases, OCS Optimisation Phase (Week -8 to Week 0), and the double-blind treatment period divided into an Induction Phase (Week 0 to Week 4), OCS Reduction Phase (Week 5 upto Week 20) followed by Maintenance Phase (Week 20 to Week 24). During the Optimisation Phase the investigator will adjust the OCS (prednisone/prednisolone) dose according to the Optimisation titration schedule based on a review of Asthma Control Questionnaire (ACQ)-5 score and exacerbation. In the Induction Phase subjects will be randomized 1:1 (approximately 60 per arm) to receive either mepolizumab (100 mg) administered subcutaneously (SC) or placebo every 4 weeks in addition to their existing maintenance asthma therapy with the lowest dose of OCS from Optimisation Phase. The Induction Phase will allow sufficient time for those subjects randomised to the mepolizumab arm to achieve a decrease in the eosinophilic inflammation prior to the reduction in OCS. During the Reduction Phase, subjects will continue receiving 100 mg mepolizumab/placebo every 4 weeks and the OCS dose reduction will be done every 4 weeks using the reduction titration schedule based on a review of eDiary parameters recorded by the subject, the subjects' exacerbation history, and a review of the signs and symptoms of adrenal insufficiency. In the Maintenance Phase subjects will be maintained without any further OCS dose adjustment. Subjects who complete the 24 week double-blind period and meet the eligibility criteria, will be offered the opportunity to participate in an open label extension (OLE) study otherwise they will return for a Follow-up Visit 12 weeks after their last dose of double blind study treatment. At each clinic visit, adverse events, safety labs, spirometery parameters and exacerbations will be assessed. The pharmacokinetic samples will be collected in the beginning of the treatment, prior to last dose, at the end of study (exit visit) and the follow up.


Condition Intervention Phase
Asthma
Drug: Mepolizumab
Drug: Placebo
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator)
Primary Purpose: Treatment
Official Title: MEA115575: A Randomised, Double-Blind, Placebo-Controlled, Parallel-Group, Multicenter Study of Mepolizumab Adjunctive Therapy to Reduce Steroid Use in Subjects With Severe Refractory Asthma

Further study details as provided by GlaxoSmithKline:

Primary Outcome Measures:
  • Percent reduction of OCS dose during weeks 20 to 24 compared with the Baseline dose, while maintaining asthma control [ Time Frame: 24 weeks ] [ Designated as safety issue: No ]
    Percent change from Baseline in OCS dose during weeks 20 to 24 will be calculated as the dose at Baseline minus the dose during weeks 20 to 24 divided by Baseline dose multiplied by 100.


Secondary Outcome Measures:
  • Proportion of subjects with >=50% reduction in daily OCS dose, compared with Baseline dose, during weeks 20 to 24, while maintaining asthma control [ Time Frame: 24 weeks ] [ Designated as safety issue: No ]
    Number of subjects who had >=50% reduction in daily OCS dose during weeks 20 to 24 from Baseline will be considered.

  • Proportion of subjects with<=5.0 mg reduction in daily OCS dose during weeks 20 to 24, while maintaining asthma control [ Time Frame: 24 weeks ] [ Designated as safety issue: No ]
    Number of subjects who had <=5.0 mg reduction in daily OCS dose during weeks 20 to 24 as compared with Baseline dose will be considered.

  • Proportion of subjects with a total reduction of OCS dose during weeks 20 to 24, while maintaining asthma control [ Time Frame: 24 weeks ] [ Designated as safety issue: No ]
    Number of subjects who had total reduction in OCS dose during weeks 20 to 24 as compared with Baseline dose will be considered.

  • Median percentage reduction from Baseline in daily OCS dose during weeks 20 to 24, while maintaining asthma control [ Time Frame: 24 weeks ] [ Designated as safety issue: No ]
    The median of percentage reduction in daily OCS dose during weeks 20 to 24 from Baseline will be calculated.

  • Safety of mepolizumab in subjects with severe refractory asthma with elevated eosinophils as evaluated by adverse events (AE)s including both systemic and local site reactions [ Time Frame: 32 weeks ] [ Designated as safety issue: No ]
    Safety and tolerability parameters include AEs including both systemic (i.e., allergic/ Immunoglobulin E [IgE]-mediated and non-allergic) and local site reactions.

  • Safety of mepolizumab in subjects with severe refractory asthma with elevated eosinophils as evaluated by clinical chemistry, haematological parameters, blood glucose, body weight, glycosylated haemoglobin (HbA1c) and vital signs [ Time Frame: 32 weeks ] [ Designated as safety issue: No ]
    Safety and tolerability parameters include clinical chemistry, haematological parameters, blood glucose, body weight, HbA1c and vital signs (pulse rate and systolic and diastolic blood pressure).

  • Adverse Events typical of and associated with the chronic use maintenance OCS [ Time Frame: 32 weeks ] [ Designated as safety issue: No ]
    The AEs typical of and associated with the chronic use maintenance OCS were recorded.

  • Mean change from Baseline in the QTc(F) of 12-lead electrocardiogram (ECG) [ Time Frame: 32 weeks ] [ Designated as safety issue: No ]
    QTc(F) of ECG is QT interval corrected by Fridericia's method.

  • Mean change from Baseline in QTc(B) of 12-lead ECG [ Time Frame: 32 weeks ] [ Designated as safety issue: No ]
    QTc(B) of ECG is QT interval corrected by Bazett's method.

  • Maximum change from Baseline for QTc(F) and QTc(B) of 12-lead ECG [ Time Frame: 32 weeks ] [ Designated as safety issue: No ]
    The maximum change from Baseline for QTc(F) and QTc(B) of 12-lead ECG.


Enrollment: 135
Study Start Date: October 2012
Study Completion Date: December 2013
Primary Completion Date: December 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Mepolizumab
Mepolizumab 100 mg subcutaneous once every 4 weeks upto Week 20
Drug: Mepolizumab
Mepolizumab is a fully humanised Immunoglobulin G antibody (IgG1, kappa) with human heavy and light chain frameworks.
Experimental: Placebo
Placebo subcutaneous once every 4 weeks upto Week 20
Drug: Placebo
Will be available as an equivalent volume of 0.9% sodium chloride.

  Eligibility

Ages Eligible for Study:   12 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Informed Consent and Study Compliance: Subjects must be able to give written informed consent prior to participation in the study, which will include the ability to comply with the requirements and restrictions listed in the consent form.
  • Systemic Corticosteroids: Requirement for regular treatment with maintenance systemic corticosteroids in the 6 months prior to Visit 1 and using a stable oral corticosteroid dose for 4 weeks prior to Visit 1. Subjects must be taking 5.0 to 35 mg/day of prednisone or equivalent at Visit 1 and must agree to switch to study required prednisone/prednisolone as their oral corticosteroid and use it per protocol for the duration of the study.
  • Inhaled Corticosteroids: Requirement for regular treatment with high dose inhaled corticosteroid in the 6 months prior to Visit 1. For 18 years of age and older: inhaled corticosteroid (ICS) dose must be >=880 microgram (µg)/day fluticasone propionate (FP) (ex-actuator) or equivalent daily. For ICS/ long acting beta2 agonist (LABA) combination preparations, the highest approved maintenance dose in the local country will meet this ICS criterion. For ages 12 to 17: ICS dose must be >=440 μg/day FP (ex-actuator) or equivalent daily.
  • Controller Medication: Current treatment with an additional controller medication for at least 3 months OR documentation of having used and failed an additional controller medication for at least 3 successive months during the prior 12 months [e.g., LABA, leukotriene receptor antagonist (LTRA), or theophylline].
  • Eosinophilic Asthma: Prior documentation of eosinophilic asthma or high likelihood of eosinophilic asthma.
  • FEV1: Persistent airflow obstruction as indicated by a pre-bronchodilator FEV1 <80% predicted.
  • Asthma: Evidence of asthma indicated by airway reversibility, hyperresponsiveness or airway variability.

Exclusion Criteria:

  • Smoking history: Current smokers or former smokers with a smoking history of >=10 pack years.
  • Concurrent Respiratory Disease: Presence of a clinically important lung condition other than asthma.
  • Malignancy: A current malignancy or previous history of cancer in remission for less than 12 months prior screening
  • Liver Disease: Unstable liver disease
  • Cardiovascular: Subjects who have severe or clinically significant cardiovascular disease uncontrolled with standard treatment.
  • Other Concurrent Medical Conditions: Subjects who have known, pre-existing, clinically significant endocrine, autoimmune, metabolic, neurological, renal, gastrointestinal, hepatic, haematological or any other system abnormalities that are uncontrolled with standard treatment.
  • Eosinophilic Diseases: Subjects with other conditions that could lead to elevated eosinophils such as Hypereosiniophilic Syndromes, including Churg-Strauss Syndrome, or Eosinophilic Esophaghitis. Subjects with a known, pre-existing parasitic infestation within 6 months prior to Visit 1 are also to be excluded.
  • ECG: ECG assessment QTcF >=450 milliseconds (msec) or QTcF >= 480 msec for subjects with Bundle Branch Block.
  • Immunodeficiency: A known immunodeficiency (e.g. human immunodeficiency virus - HIV), other than that explained by the use of corticosteroids taken as therapy for asthma.
  • Omalizumab Use: Subjects who have received omalizumab [Xolair] within 130 days of Visit 1.
  • Other Monoclonal Antibodies: Subjects who have received any monoclonal antibody (other than Xolair) to treat inflammatory disease within 5 half-lives of Visit 1.
  • Investigational Medications: Subjects who have received treatment with an investigational drug within the past 30 days or five terminal phase half-lives of the drug whichever is longer, prior to Visit 1 (this also includes investigational formulations of marketed products).
  • Hypersensitivity: Subjects with a known allergy or intolerance to a monoclonal antibody or biologic.
  • Pregnancy: Subjects who are pregnant or breastfeeding. Patients should not be enrolled if they plan to become pregnant during the time of study participation.
  • Alcohol/Substance Abuse: A history (or suspected history) of alcohol misuse or substance abuse within 2 years prior to Visit 1.
  • Adherence: Subjects who have known evidence of lack of adherence to controller medications and/or ability to follow physician's recommendations.
  • Previous participation: Subjects who have previously any study of mepolizumab and received Investigational Product.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01691508

  Show 47 Study Locations
Sponsors and Collaborators
GlaxoSmithKline
Investigators
Study Director: GSK Clinical Trials GlaxoSmithKline
  More Information

No publications provided by GlaxoSmithKline

Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: GlaxoSmithKline
ClinicalTrials.gov Identifier: NCT01691508     History of Changes
Other Study ID Numbers: 115575
Study First Received: September 20, 2012
Last Updated: August 21, 2014
Health Authority: United Kingdom: Medicines and Healthcare Products Regulatory Agency
France: Agence Nationale de Sécurité du Médicament et des produits de santé
Poland: URZAD REJESTRACJI PRODUKTOW LECZNICZYCH, WYROBOW MEDYCZNYCH I PRODUKTOW BIOBOJCZYCH
United States: Food and Drug Administration
Mexico: Comision Federal para la Proteccion contra Riesgos Sanitarios (COFEPRIS)
Canada: Health Canada
Netherlands: De Centrale Commissie Mensgebonden Onderzoek
Czech Republic: Statni ustav pro kontrolu leciv
Australia: Therapeutic Goods Administration
Germany: Pau-Ehrlich Institute

Keywords provided by GlaxoSmithKline:
Safety
Steroid Reduction
Efficacy
SB-240563
Eosinophils
Quality of Life
Mepolizumab
Severe Refractory Asthma

Additional relevant MeSH terms:
Asthma
Bronchial Diseases
Hypersensitivity
Hypersensitivity, Immediate
Immune System Diseases
Lung Diseases
Lung Diseases, Obstructive
Respiratory Hypersensitivity
Respiratory Tract Diseases

ClinicalTrials.gov processed this record on November 25, 2014