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for people ages 18–75 (full criteria)
at San Francisco, California
study started
estimated completion:



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.


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.




You can join if…

Open to people ages 18–75

  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.

You CAN'T join if...

  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.


  • UCSF Airway Clinical Research Center accepting new patients
    San Francisco, California, 94143, United States


accepting new patients
Start Date
Completion Date
University of California, San Francisco
UCSF Airway Clinical Research Center website
Lead Scientist
John Fahy
Study Type
Last Updated
June 2016
I’m interested in this study!