Viral-Related Neutrophil Response and Condition Severity in People With ARDS
Acute respiratory distress syndrome (ARDS) is a severe lung condition that can result from a bacterial infection in the lungs. Viral infections may impair the body's immune system response to bacteria, which may lead to more serious lung injury. This study will evaluate the association between the immune response and ARDS severity in people who have ARDS plus a viral infection.
Respiratory Distress Syndrome, Adult
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||A Prospective Assessment of Viral-induced Adaptation of Neutrophil Response in ARDS - Ancillary to ARDS Network Trials|
- Primary outcome measure of subject mortality. [ Time Frame: baseline to 90 days ] [ Designated as safety issue: No ]
|Study Start Date:||August 2007|
|Study Completion Date:||July 2012|
|Primary Completion Date:||January 2011 (Final data collection date for primary outcome measure)|
ARDS is a serious condition that involves inflammation and fluid accumulation in the lungs, leading to low blood oxygen levels and breathing failure. It is often fatal and affects approximately 150,000 individuals each year in the United States. Common underlying causes include bacterial infections, lung trauma, and pneumonia. Even in people with similar risk factors for ARDS, there are often varying levels of condition severity. This may be because some people experience an ongoing viral infection that further predisposes them to the bacterial infection, worsening the severity of ARDS. Viruses release a protein called Type I interferon. This protein increases the response of the interferon stimulated genes (ISG) in neutrophils, which are white blood cells that protect the body against disease and infections by destroying bacteria. Preliminary studies have shown that some people at risk for ARDS have elevated ISGs in their neutrophils and that ISGs are associated with an impaired neutrophil response and increased severity of ARDS. This study will evaluate the association between viral-related neutrophil ISG response and the severity of ARDS.
Participants will include people on mechanical ventilation who are enrolled in either the ARDSNet 06 or 07 studies. For this study, participants will undergo blood collection within 48 hours of beginning the main ARDSNet study. There will be no study visits specifically for this study. Study researchers will analyze participants' blood samples and ARDSNet study data to gather information on mortality, the number of ventilator-free days, markers of severity of organ dysfunction and inflammation, and neutrophil response.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00548795
|United States, Colorado|
|University of Colorado Health Sciences Center|
|Aurora, Colorado, United States, 80010|
|Principal Investigator:||Jerry A. Nick, MD||National Jewish Health|