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Safety Study of 20,000 EU of Clinical Center Reference Endotoxin in Allergic Adults With and Without Mild Asthma

This study has been terminated.
(Data collected under different protocol; funding exhuasted)
National Institutes of Health (NIH)
Information provided by (Responsible Party):
David B. Peden, MD, University of North Carolina, Chapel Hill Identifier:
First received: February 28, 2008
Last updated: October 5, 2012
Last verified: October 2012
Endotoxin is a component of outdoor air pollution, an air contaminant found in a number of different workplaces, and is even found in homes. The endotoxin used for this study is obtained from the National Institutes of Health, and is called "Clinical Center Reference Endotoxin", or CCRE. The purpose of this Phase 1 research study is to identify a dose of inhaled endotoxin that is safe (does not cause prolonged cough, shortness of breath or other problems), but causes changes in your sputum cell samples that the scientists can measure. Phase 1 research studies like this one are not intended to be a treatment, but are a scientific investigation. Eventually, with these types of studies we will be able to examine why some people are more sensitive to endotoxin. Scientists at other universities have found that while most people do not have a considerable lung response to endotoxin at doses as high as 60,000 EU (endotoxin units), a few respond to as little as a total dose of 4500 EU. Our study is designed to identify if using a dose of 20,000 EU causes changes in the lung cells but does not cause symptoms in our study subjects. In our previous studies in our lab, using an endotoxin from another source, we have used higher doses (15,000 EUs) in subjects with asthma with no major problems, and we have used 10,000 EUs of CCRE in subjects with allergies and asthma without problems. We have used 20,000 EUs of CCRE in healthy individuals with no major problems.

Condition Intervention Phase
Mild Allergic Rhinitis
Mild Allergic Rhinitis With Mild Asthma
Biological: Clinical Center Reference Endotoxin
Phase 1

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Basic Science
Official Title: Safety Study of 20,000 EU of Clinical Center Reference Endotoxin in Allergic Adults With and Without Mild Asthma

Further study details as provided by University of North Carolina, Chapel Hill:

Primary Outcome Measures:
  • Increased sputum neutrophils with no adverse events [ Time Frame: 6 hours post challenge ]

Enrollment: 4
Study Start Date: May 2008
Study Completion Date: May 2012
Primary Completion Date: May 2012 (Final data collection date for primary outcome measure)
Intervention Details:
    Biological: Clinical Center Reference Endotoxin
    single inhalation challenge

Ages Eligible for Study:   18 Years to 50 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Mild allergic rhinitis
  • Mild allergic asthma
  • Normal lung function
  • No other chronic illness

Exclusion Criteria:

  • Use of inhaled or oral steroids
  • Emergency treatment of asthma in last year
  • Inhaled tobacco use
  Contacts and Locations
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Please refer to this study by its identifier: NCT00630461

United States, North Carolina
UNC Center for Environmental Medicine, Asthma and Lung Biology
Chapel Hill, North Carolina, United States, 27599
Sponsors and Collaborators
University of North Carolina, Chapel Hill
National Institutes of Health (NIH)
Principal Investigator: David b Peden, MD, MS University of North Carolina
  More Information

Responsible Party: David B. Peden, MD, Professor of Pediatrics, University of North Carolina, Chapel Hill Identifier: NCT00630461     History of Changes
Other Study ID Numbers: 07-2026 GCRC 2627
Study First Received: February 28, 2008
Last Updated: October 5, 2012

Keywords provided by University of North Carolina, Chapel Hill:
mild asthma, mild allergies

Additional relevant MeSH terms:
Rhinitis, Allergic
Bronchial Diseases
Respiratory Tract Diseases
Lung Diseases, Obstructive
Lung Diseases
Respiratory Hypersensitivity
Hypersensitivity, Immediate
Immune System Diseases
Nose Diseases
Respiratory Tract Infections
Otorhinolaryngologic Diseases processed this record on May 25, 2017