Effect of Fasting on the Asthma Inflammasome
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|ClinicalTrials.gov Identifier: NCT02471300|
Recruitment Status : Completed
First Posted : June 15, 2015
Last Update Posted : February 13, 2020
Research shows that restricting calories has a positive effect on immune cell health in healthy people. Researchers want to learn if it will help people with asthma. They want to better understand how the body s immune response and lung function responds to short-term calorie restriction. For this, they want people to fast (no food or drink except water) for 24 hours.
To explore the benefits of calorie restriction in people with asthma.
Healthy people ages 18 to 60 who have a history consistent with asthma and prior documentation of airflow obstruction or wheezing.
- Participants who have taken part in asthma research at NIH will be screened with a telephone interview. All other participants will have a medical history, blood tests, and physical exam.
- Eligible participants will return to the NIH Clinical Center one morning for 2 hours. They will be fed breakfast. They may have blood and urine tests.
- Participants will then fast for 24 hours.
- Participants will return to the Clinical Center the next morning for 4 hours. They will have blood drawn. They will eat breakfast and then repeat blood draws 2.5 hours later. They will have a urine test.
- Blood and urine tests will be done at the end of the fast and after the meals to confirm that the participant fasted for the full 24-hour period.
- Participants will have lung function tests and exhaled gas measurements. A machine will measure the volume of air they can breathe out. Some gases in the breath increase with inflammation. Participants will breathe into a machine that analyzes the gases in their breath.
|Condition or disease|
|Study Type :||Observational|
|Actual Enrollment :||19 participants|
|Official Title:||Pilot Study to Evaluate the Effect of Fasting on the Asthma Inflammasome|
|Actual Study Start Date :||August 26, 2015|
|Actual Primary Completion Date :||January 7, 2019|
|Actual Study Completion Date :||January 7, 2019|
stable mild-moderate asthmatic subjects
- Change in IL-1-beta secretion in response to inflammasome stimulation in PBMCs comparing the fasted response to the fed response [ Time Frame: 24 hours ]Determine whether the NLRP3 inflammasome is blunted by a 24-hour fast in PBMC s in subjects with mild to moderate asthma.Initiate 24-hour fast with the exception of drinking water and use of asthma medications until midnight. Patients will be asked to hold their asthma medications after midnight. Fasting research labs to study the inflammasome and Fed State Research Labs to study the inflammasome.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02471300
|United States, Maryland|
|National Institutes of Health Clinical Center, 9000 Rockville Pike|
|Bethesda, Maryland, United States, 20892|
|Principal Investigator:||Michael N Sack, M.D.||National Heart, Lung, and Blood Institute (NHLBI)|