- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00029510
Magnesium and Asthma - Clinical Trials
August 17, 2006 updated by: National Center for Complementary and Integrative Health (NCCIH)
Asthma currently affects an estimated 15 million Americans.
A number of studies have found an association between low dietary magnesium (Mg) intake and increased asthma incidence and severity of symptoms.
However, clinical intervention trials are necessary to directly assess whether there is a true protective or preventative causal relationship between low Mg and asthma.
In our study, we will assess the effects of 6 1/2 months of oral Mg supplements or placebo on clinical markers of asthma control, indirect biomarkers of inflammation, bronchial hyperresponsiveness, and indices of oxidative defense and damage in subjects with mild to moderate persistent asthma.
Study Overview
Detailed Description
Over the past twenty years a number of studies of acute bronchial asthma have shown that i.v. or nebulized MgS04 may improve symptoms over a course of hours.
With respect to dietary supplementation, short term (3 wk) oral Mg has been associated with a significant decrease in symptoms but no significant effect on measurements like FEV1 or bronchial hyperreactivity by methacholine challenge.
Although a large number of studies have attempted to address this issue, we believe that major gaps still exist.
One of the gaps is in the comparison of large numbers of asthmatics and non-asthmatics, with regard to dietary intake, and a variety of measures of Mg status.
We will evaluate baseline Mg intake (diet, tap and bottled drinking water, vitamin-mineral supplements, laxatives, and antacids), and multiple measures of Mg status, such as total and free serum Mg, total erythrocyte Mg, and Mg retention after an IV Mg load in subjects with and without asthma.
Furthermore there are no large-scale studies evaluating the effects of Mg supplementation on asthma control and clinical markers, and markers of inflammation.
We propose to assess the effects of 6 1/2 months of oral Mg on clinical markers of asthma control (asthma symptom diary, monthly spirometry, asthma quality of life questionnaire (QOL)), indirect biomarkers of inflammation (exhaled nitric oxide and serum eosinophil cationic protein) and bronchial hyperresponsiveness (methacholine challenge)in subjects with mild to moderate persistent asthma.
Dietary Mg will be assessed using the 24 hr recall.
Our hypotheses are that 1.) subjects with mild to moderate persistent asthma, as defined by National Institutes of Health National Asthma Education and Prevention Program (NIH NAEPP) clinical guidelines will have poorer Mg status than nonasthmatics, and 2.) that marginal Mg intake and status may modulate the severity of asthma.
Thus, subjects with asthma who have marginal intake/status and thus relatively lower total and free plasma Mg, lower erythrocyte total Mg, and higher Mg retention will show improvement in the aforementioned clinical and indirect biomarkers.
In contrast, Mg supplements will have little effect in subjects with highest intakes and Mg status.
We do not anticipate that Mg supplementation will replace conventional treatment, but may complement and decrease the need for conventional medication.
Study Type
Interventional
Enrollment
240
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
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California
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Sacramento, California, United States, 95817
- University of California at Davis School of Medicine, Ticon 1, Suite 100B, 2000 Stockton Blvd
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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
21 years to 55 years (Adult)
Accepts Healthy Volunteers
Yes
Genders Eligible for Study
All
Description
- Mild to moderate persistent asthma (NAEPP 1997 revised guidelines)
- Current use of inhaled beta-2- agonists or steroid inhaler therapy only (No use of prednisone in past 3 months)
- No use of products (i.e. antacids, laxatives, supplements) containing more than 50 mg Mg daily in the last 3 months
- No current use of theophylline, leukotriene antagonists, or other systemic immunomodulating compounds
- Nonsmoker
- No concurrent pulmonary disease (pulmonary hypertension, cystic fibrosis, sarcoidosis, bronchiectasis, hypersensitivity pneumonitis, restrictive lung disease, abnormal DLCOva)
- No concurrent medical diagnoses (alcoholism, coronary artery disease, diabetes, HIV infection, chronic hepatitis, uncontrolled hypertension, chronic renal failure or a psychiatric disorder that is judged to make full participation difficult)
- Not pregnant or lactating.
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: Double
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Investigators
- Principal Investigator: Judith S Stern, Sc.D., University of California, Davis
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
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
May 1, 2002
Study Completion
June 1, 2006
Study Registration Dates
First Submitted
January 14, 2002
First Submitted That Met QC Criteria
January 14, 2002
First Posted (Estimate)
January 15, 2002
Study Record Updates
Last Update Posted (Estimate)
August 18, 2006
Last Update Submitted That Met QC Criteria
August 17, 2006
Last Verified
July 1, 2006
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- R01AT000652-02 (U.S. NIH Grant/Contract)
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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