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Mechanisms of Exacerbation of Asthma (MECA)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00594750
Recruitment Status : Active, not recruiting
First Posted : January 16, 2008
Last Update Posted : February 1, 2022
National Heart, Lung, and Blood Institute (NHLBI)
Information provided by (Responsible Party):
University of California, San Francisco

Brief Summary:
The purpose of this study is to identify the causes of asthma that were not previously suspected, to better understand the effects of inhaled steroids on asthma and to identify new way to treat asthma.

Condition or disease

Detailed Description:
In this study, we will explore mechanisms of exacerbation in asthma by careful characterization studies in asthmatics presenting in acute severe exacerbation. Specifically, we will determine the frequency of secretor status in these subjects by blood and saliva testing, and we will also perform a detailed cellular and biochemical analysis of their airway secretions. We will collect airway secretions using two methods. One method will be to have subjects cough sputum into a clean plastic container. The other method only applies to asthmatics with near-fatal asthma requiring intubation and mechanical ventilation. In these asthmatics, we will collect airway secretions by tracheal aspirate using methods normally applied in their clinical care.

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Study Type : Observational
Estimated Enrollment : 115 participants
Observational Model: Cohort
Time Perspective: Cross-Sectional
Official Title: Mechanisms of Exacerbation of Asthma
Study Start Date : May 2006
Estimated Primary Completion Date : September 2022
Estimated Study Completion Date : December 2022

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Asthma

People who have been diagnosed with Asthma

Primary Outcome Measures :
  1. rheological measurements (viscosity and elasticity) in sputum from patients with acute severe asthma [ Time Frame: 1-2 years ]

Biospecimen Retention:   Samples Without DNA
Sputum, whole blood

Information from the National Library of Medicine

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, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years to 75 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
emergency deparment, admitted patients in the ICU and inpatient wards

Inclusion Criteria:

  1. Male and female subjects with a history of asthma between the ages of 18 to 75 years.
  2. Physician diagnosis of asthma.
  3. Currently experiencing an acute exacerbation of asthma. This exacerbation may be severe necessitating treatment in the emergency room, ICU, or hospital ward.
  4. Ability to provide informed consent.

Exclusion Criteria:

  1. Lung disease other than asthma.
  2. Females who are lactating or who are pregnant.
  3. Use of recreational drugs in the 1 month preceding the study.

Information from the National Library of Medicine

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 identifier (NCT number): NCT00594750

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United States, California
UCSF Airway Clinical Research Center
San Francisco, California, United States, 94143
Sponsors and Collaborators
University of California, San Francisco
National Heart, Lung, and Blood Institute (NHLBI)
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Principal Investigator: John V Fahy, M.D., M.Sc. University of California, San Francisco
Additional Information:
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Responsible Party: University of California, San Francisco Identifier: NCT00594750    
Other Study ID Numbers: 10-01329
5R01HL080414-08 ( U.S. NIH Grant/Contract )
First Posted: January 16, 2008    Key Record Dates
Last Update Posted: February 1, 2022
Last Verified: January 2022
Additional relevant MeSH terms:
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Bronchial Diseases
Respiratory Tract Diseases
Lung Diseases, Obstructive
Lung Diseases
Respiratory Hypersensitivity
Hypersensitivity, Immediate
Immune System Diseases