Soluble Corn Fiber Supplementation for Asthma

Status Completed

Clinical Trial Summary

Studies of the importance of the human microbiome have demonstrated that microbial metabolites of fermentation of our dietary products (e.g. dietary fiber) have a multitude of health benefits. The investigators aim to determine whether supplementation of asthmatic children with soluble corn fiber alongside standard of care reduces airway inflammation driven by the gut microbial metabolites acetate, propionate, or butyrate (short chain fatty acids).

Clinical Trial Description

Asthma is a complex inflammatory disease of the airways that is estimated to affect 300 million people worldwide. Incidence of asthma is steadily increasing in Western populations; an additional 100 million asthma diagnoses are anticipated by the year 2025. Asthma is a multifactorial disease affected by genetic and environmental factors. One major and potentially modifiable environmental factor is the Western diet. The Western diet influences the microbiome, which in turn, may influence inflammatory airway diseases via a gut microbiome-airway connection. The investigators hypothesize that prebiotic dietary fiber supplementation leads to increased circulating short chain fatty acid production and improvement in asthma disease activity. The investigators will recruit 20 children, ages 6-17 years old, with asthma from the Severe Asthma Clinic or General Pulmonary Clinic at Phoenix Children's Hospital. Participants will be randomly assigned (1:1) using a random number generator to ingest PROMOTIR soluble corn fiber (85% fiber, 12 g/day) in a fruit-flavored beverage or placebo (malodextrin in a similar fruit-flavored beverage) as previously described. Participants will be asked to consume the prebiotic soluble corn fiber (or placebo) for 4 weeks alongside their normal diet and normal asthma treatments. Blood will be collected pre- and post-fiber intervention to measure baseline and post-intervention circulating SCFAs. Stool samples and nasal wash will be collected for microbiome and immune analysis pre- and post- fiber consumption. Nasal washes will be collected pre- and post-fiber consumption to measure inflammatory patterns. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT03673618
Study type	Interventional
Source	Phoenix Children's Hospital
Contact
Status	Completed
Phase	Phase 2
Start date	September 1, 2019
Completion date	December 31, 2021

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.