Asthma/Steroid Withdrawal Study

The recruitment status of this study is unknown because the information has not been verified recently.
Verified August 2010 by University of Alberta.
Recruitment status was  Active, not recruiting
Sponsor:
Collaborator:
GlaxoSmithKline
Information provided by:
University of Alberta
ClinicalTrials.gov Identifier:
NCT00395239
First received: November 1, 2006
Last updated: August 30, 2010
Last verified: August 2010
  Purpose

The investigators propose to study the patterns of metabolite changes in subjects with asthma to determine if there is a predictable pattern prior to, and post, clinical exacerbation.

Hypothesis: 1. Metabolite profiles will change prior to detection of a clinical exacerbation in subjects with asthma.

2. There will be a measurable temporal delay before metabolite profiles return to baseline following anti-inflammatory therapy of an exacerbation of asthma.


Condition Intervention Phase
Asthma
Drug: inhaled corticosteroid
Phase 4

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: The Temporal Sequence of Inflammatory Mediators During a Controlled Exacerbation of Asthma by Steroid Withdrawal.

Resource links provided by NLM:


Further study details as provided by University of Alberta:

Primary Outcome Measures:
  • Metabolite changes in induced sputum [ Time Frame: 20 weeks ] [ Designated as safety issue: No ]
  • Metabolite changes in urine [ Time Frame: 20 weeks ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Health related quality of life status [ Time Frame: 20 weeks ] [ Designated as safety issue: No ]
  • Peak expiratory flow measurements [ Time Frame: 20 weeks ] [ Designated as safety issue: Yes ]

Estimated Enrollment: 20
Study Start Date: October 2006
Estimated Study Completion Date: October 2010
Estimated Primary Completion Date: January 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1 Drug: inhaled corticosteroid
Fluticasone; Budesonide; Ciclesonide Dosage and frequency is patient dependant.
Other Name: Flovent; Pulmicort; Alvesco.

  Hide Detailed Description

Detailed Description:

Methods:

We propose to study 20, non-smoking, asthmatic adults. Subjects will be recruited from outpatient asthma clinics in Edmonton. All subjects will meet GINA criteria for mild persistent to moderate persistent asthma. Following informed consent we will obtain blood, induced sputum and urine samples after an overnight fast and free of any caffeine for at least 24 hours. We will also obtain routine demographic information including age, sex, and usual asthma medication usage. We will obtain health related quality of life status using generic (15D) and disease specific (Asthma Quality of Life) questionnaires. Subjects will be instructed regarding use of peak flow meters and the typical symptoms associated with loss of asthma control. They will be instructed regarding accessing a dedicated asthma website that incorporates the above questions (Visit 1). There is also a place for subjects to enter twice daily peak flow measurements. The website is password protected and each subject can access only their own individualized data entry pages. A research coordinator is able to access any subject data again using a unique password. We will use this internet-based program to monitor daily PEF and daily asthma symptoms. Patients will be instructed to access the website daily and will reassessed at 2 weeks. Subjects will then be instructed to continue with their usual asthma management and to log on to the asthma website daily to record symptoms and twice daily peak flows. Only subjects meeting criteria for well controlled asthma (GOAL criteria) along with objective compliance with study protocols over 2 weeks will then be enrolled in the next phase of the study.

Phase 1. After two weeks, subjects will return (Visit 2). At this time a blood (10 ml) and urine sample will be obtained and stored for subsequent metabolomic analysis. An exhaled gas sample will be collected and analyzed for nitric oxide concentration using a sensitive chemiluminescence technique. An induced sputum sample will also be obtained using standardized protocols and cell count and differential will be determined. The remainder of the sputum sample will also be stored for subsequent analysis. All tests will be performed in the morning after an overnight fast.

Phase 2. During the second phase of the study, subjects will be instructed to reduce their controller medication (inhaled corticosteroid alone or combined inhaled corticosteroid with long acting beta 2 agonist) by 50% e.g. from 4 puffs daily to 2 puffs daily. Subjects will log on to their website daily for 4 weeks or until they experience a mild exacerbation (see definition below). If they experience a clinical exacerbation, they will be instructed to return to the hospital site where repeat blood, urine, exhaled air and sputum testing will be obtained (Visit 3a). They will be instructed to increase their controller medication and to continue with the increased steroid phase of the study. Those not experiencing a clinical exacerbation will return to the hospital site at the end of the four weeks (Visit 3b). They will have repeat blood, urine and sputum samples and will then be instructed to eliminate controller medication for four weeks or until they experience a clinical exacerbation. Those experiencing a clinical exacerbation will be treated as outlined above. Those continuing to experience clinical good control will be brought back at four weeks for repeat blood, urine, exhaled air and sputum analysis (Visit 3c). Throughout the 4-8 week period of inhaled steroid withdrawal, patients will be asked to save a urine sample three times weekly. These samples will be stored in pre-labeled containers in their freezer until picked up by the study coordinator at weekly intervals.

Phase 3. After a patient experiences a mild exacerbation or at the end of 8 weeks of steroid reduction and elimination, patients will enter the final phase of the study. At that time all patients will be instructed to increase their controller medication back to their baseline values. They will be followed for four weeks and repeat blood, urine, exhaled air and sputum samples will be obtained (Visit 4). Finally, subjects will be instructed to double their usual controller medication for four weeks after which repeat blood, urine and sputum samples will be obtained. Again, subjects will collect and store urine samples at a frequency of 3 times per week. The subjects will then be instructed to resume their usual asthma controller medication dosing and the study will be complete (Visit 5). All tests will be performed in the morning after an overnight fast.

A mild exacerbation will be defined by any one of the following events:

  1. A decrease in peak flow to less than 80% of best effort for two consecutive days.
  2. An increase in reliever medication (fast acting beta 2 agonist) by 50% over baseline needs for two consecutive days
  3. Waking at night due to asthma on two consecutive nights A severe exacerbation will be defined as any need for additional medical contact for treatment of asthma (e.g. Emergency Room, Walk-in Clinic) or any hospital admission for asthma. The need for oral corticosteroids will also constitute a severe exacerbation. If at any point the subjects undergo a severe exacerbation, they will be examined by either their own treating physician or by one of the physicians associated with this study and appropriate escalation of treatment will be commenced. The REB will be informed of all severe exacerbations. The study coordinator and one of the study physicians will be available by pager around the clock during the course of the study.
  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  1. Non-smoker (less than 1 pack-year).
  2. Age greater than 18 years old.
  3. Ability to obtain informed consent.
  4. Pulmonary Function Tests demonstrating greater than 12% FEV1 reversibility following beta agonist OR a methacholine challenge consistent with airways hyper-reactivity.
  5. Evidence of atopy on standardized skin test battery.
  6. Mild to moderate persistent asthma classification by GINA guidelines.
  7. No severe exacerbations in the preceding 3 months (defined as emergency room visit, course of oral prednisone or hospitalization).
  8. Access to internet.

Exclusion Criteria:

  1. Unstable asthma.
  2. Patient not on inhaled corticosteroids.
  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: NCT00395239

Locations
Canada, Alberta
University of Alberta Hospital
Edmonton, Alberta, Canada, T6G 2B7
Sponsors and Collaborators
University of Alberta
GlaxoSmithKline
Investigators
Principal Investigator: Irvin Mayers, MD, FRCPC University of Alberta
  More Information

No publications provided

Responsible Party: Irvin Mayers, University of Alberta
ClinicalTrials.gov Identifier: NCT00395239     History of Changes
Other Study ID Numbers: Asthma/Steroid Withdrawal
Study First Received: November 1, 2006
Last Updated: August 30, 2010
Health Authority: Canada: Health Canada

Keywords provided by University of Alberta:
Asthma
Inhaled corticosteroid
ICS
Metabolites
Induced sputum
Virtual Asthma Clinic

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

ClinicalTrials.gov processed this record on August 28, 2014