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Our Specialists

Clinical Trials

Steroids in Eosinophil Negative Asthma (SIENA)

Most people with asthma have inflammation in their airway. Asthma controller medications, like inhaled corticosteroids, are meant to reduce inflammation in the airway. Reducing airway inflammation should make one's breathing easier. However, many people with asthma don't breathe easier when they take an inhaled corticosteroid. We know that there are several types of cells that can cause airway inflammation. However, inhaled corticosteroids mostly target only one cell called the eosinophil. The purpose of this study is to find out if people should take an asthma controller medication based on the type of inflammatory cells present in their airway.

Study participation involves: 

  • 10 visits to our research unit over ~ 1 year 
  • Asthma and allergy tests at no charge  
  • Asthma medications at no cost

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Reasons to Visit National Jewish Health

  • The leading respiratory hospital in the nation and the only one devoted fully to the treatment of respiratory and related illnesses
  • Ranked as one of the top two hospitals in pulmonology every year since U.S. News & World Report included this category in its annual “Best Hospitals” survey
  • Ranked in the top 1 percent of hospitals in the nation by HCAHPS
  • Physicians frequently recognized as among the best in the nation by multiple services, including Best Doctors in America and Castle Connolly
  • Among the top 8 percent of organizations funded for research by the NIH, providing patients access to the latest clinical trials
  • 117-year history of focus on care, research and education serving thousands of patients with lung, heart, immune and related disorders


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