- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01317563
Antioxidant Therapy in Lean and Obese Asthmatics (ALOA)
March 21, 2016 updated by: Jason Lang, Nemours Children's Clinic
Phase 2 Study of Antioxidant Therapy in Lean and Obese Asthmatics
This project will assess the effectiveness of antioxidant supplementation with common vitamins A, C, E and selenium in controlling asthma symptoms among lean and obese asthmatics.
This project may improve our ability to treat asthma and our understanding of the link between nutritional antioxidants and asthma.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
Asthma & Obesity are both growing public health crises that also may be critically interrelated for many patients.
Obesity increases the risk for asthma in both adults and children, and obesity increases the severity of existing asthma.
Obesity leads to increased systemic oxidative stress, however little is know about obesity-related oxidative stress within the airway.
Since oxidative stress contributes to the pathogenesis of asthma, obesity may influence asthma risk and severity through this mechanism.
Asthmatics have low serum antioxidant activity.
There is conflicting evidence about whether or not antioxidant supplementation reduces asthma severity.
This may be related to asthma's heterogeneous nature.
Antioxidant supplementation may be effective in select subgroups that have the greater oxidative stress, such as asthmatics with occupational exposures or obesity.
In fact, the evidence supporting antioxidant supplementation in asthma involved subjects with oxidant-related triggers.
We hypothesize that obesity-related oxidant stress puts asthmatics at risk for increased airway oxidative stress and greater asthma severity.
We hypothesize that supplementation with common antioxidants will significantly reduce airway inflammation and oxidative stress, and lead to improved pulmonary function and daily asthma control.
This pilot study is designed as a randomized, double-blinded, placebo-controlled, parallel intervention trial involving lean and obese adolescents and young adults with asthma.
After the 2-week run-in period, all subjects will undergo baseline testing (see figure 1).
At randomization they will receive either placebo or a multivitamin antioxidant for 42 days.
At the end of the 42 day intervention all subjects will undergo final testing.
Primary Hypothesis: In young asthmatics, antioxidant supplementation increases plasma and airway antioxidant levels leading to improved lung function and asthma control.
Secondary Hypotheses: 1) Obesity-related systemic oxidant stress is associated with increased oxidative stress within the airway.
2) Antioxidant supplementation will lead to greater improvements in asthma control among obese compared to lean (not underweight) asthmatics.
3) Antioxidant supplementation will lead to greater improvements in airway markers of inflammation and oxidative stress among obese compared to lean asthmatics.
We will assess asthma control and lung function before and after therapy.
Study Type
Interventional
Enrollment (Actual)
43
Phase
- Phase 2
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
Florida
-
Jacksonville, Florida, United States, 32207
- Nemours Children's Clinic
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
12 years to 25 years (Child, Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- age 12-25,
- physician-diagnosed persistent asthma on daily controller therapy,
- FEV1% >= 60% predicted,
- Lung responsiveness (>= 12% BD reversibility or PC20 MCT <= 16mg/ml)
Exclusion Criteria:
- taking daily MVI,
- chronic oral steroid therapy,
- BMI<20th percentile,
- smoking history,
- pregnancy,
- milk allergy,
- celiac disease
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Antioxidant arm
Two capsules twice daily (total daily dose = Vitamin A 10000 IU, Vitamin C 1200mg, Vitamin E 400 IU, Selenium 300mcg)
|
daily dose = Vitamin A 10000 IU (beta carotene), Vitamin E 400 IU, Vitamin C 1200mg, and Selenium 300mcg.
|
Placebo Comparator: Placebo arm
two capsules twice daily (total daily dose = 1200mg whey protein, 800mg microcrystalline cellulose)
|
total daily dose = 1200mg whey protein, 800mg microcrystalline cellulose
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Asthma Control Questionnaire (Juniper)- (ACQ)
Time Frame: 6 weeks
|
ACQ is a 7 component test that includes 6 responses elliciting control of asthma symptoms plus one component based on FEV1 (spirometry).
The score ranges from 0-6, with a higher score suggesting greater asthma symptoms.
|
6 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Asthma Symptom Utility Index
Time Frame: 6 weeks
|
Questionnaire assessing patient reported asthma symptoms from the previous 2 weeks.
Score ranges from 0 to 1 with a higher score suggesting better asthma control.
|
6 weeks
|
change in FEV1
Time Frame: 6 weeks
|
Spirometric measure of volume expired in 1 second.
|
6 weeks
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Principal Investigator: Jason E Lang, M.D., Nemours Children's Clinic
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
July 1, 2008
Primary Completion (Actual)
June 1, 2012
Study Completion (Actual)
March 1, 2016
Study Registration Dates
First Submitted
March 16, 2011
First Submitted That Met QC Criteria
March 16, 2011
First Posted (Estimate)
March 17, 2011
Study Record Updates
Last Update Posted (Estimate)
March 22, 2016
Last Update Submitted That Met QC Criteria
March 21, 2016
Last Verified
March 1, 2016
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Respiratory Tract Diseases
- Immune System Diseases
- Lung Diseases
- Hypersensitivity, Immediate
- Bronchial Diseases
- Lung Diseases, Obstructive
- Respiratory Hypersensitivity
- Hypersensitivity
- Asthma
- Physiological Effects of Drugs
- Molecular Mechanisms of Pharmacological Action
- Protective Agents
- Trace Elements
- Micronutrients
- Vitamins
- Antioxidants
- Selenium
- Vitamin A
Other Study ID Numbers
- ALASE08140ALOA
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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