- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02230189
Study of the Inflammation and Airway Changes That Occur After Exposure to Allergen in Asthmatics (ACE)
Mechanistic Study of Epithelial miRNAs and T-cell Recruitment Dynamics That Occur After Allergen Challenge in Patients With Asthma.
Study Overview
Status
Conditions
Study Type
Enrollment (Actual)
Phase
- Phase 2
Contacts and Locations
Study Locations
-
-
California
-
San Francisco, California, United States, 94143
- University of California, San Francisco
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Allergic/Non-Asthmatic subjects and Allergic/Asthmatic subjects
Inclusion Criteria:
- Positive skin test to dust mite or cat allergen
Non-Allergic/Non-Asthmatic subjects
Inclusion Criteria:
- Negative skin test to panel of 12 allergens, including dust mite and cat allergen
All groups
Exclusion Criteria:
- History of intubation for asthma exacerbation
- Use of Xolair (omalizumab) within the last 6 months
- Immunotherapy with cat or dust mite extract now or in the past 5 years
- ≥ 10 pack-years smoking or any smoking in the past year
- Other lung diseases, such as sarcoidosis, bronchiectasis or active lung infection
- History of dermatographia
- History of anaphylaxis to cat allergen
- Participation in another research study involving a drug or biologic during the past 30 days
- Presence of past or current medical problems/other factors that may pose additional risks from participation or influence study results, as determined per study investigator
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Allergen challenge subjects
Intervention: Segmental airway allergen challenge Three types of subjects are studied in this arm: 1) Volunteers with neither asthma nor allergy (as established by skin prick testing); 2) Volunteers with allergy (as established by skin prick testing) but without asthma; and 3) Volunteers with both asthma and allergy (as established by skin prick testing) |
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Difference in Expression of Epithelial miRNAs (in Read Counts) 24 Hours After Allergen-challenge as Compared to 24 Hours After Diluent Challenge in Participants With Allergic Asthma
Time Frame: 24 hours
|
For each participant with Allergic Asthma, a baseline airway epithelial brushing was performed, allergen was instilled into one segment of the lung, and diluent (control) was instilled into another segment.
Both segments were brushed for epithelial cells 24 hours later.
After processing brushes to RNA and generating RNA sequencing data, the RNA transcript read counts for each gene underwent variance stabilized log normalization.
Then we built a regression model which estimated the difference in miRNA read count in the allergen challenged as compared to the baseline sample and the difference in miRNA read count in the diluent challenged segment as compared to baseline for each participant.
The change from baseline read count for each miRNA in the allergen samples was compared to the change in the diluent samples and statistical significance was assessed using the unadjusted p-value(<0.05).
The direction of change does not have clinical significance; this was a mechanistic study.
|
24 hours
|
Difference in Expression of Epithelial miRNAs (in Read Counts) 7 Days After Allergen-challenge as Compared to 7 Days After Diluent Challenge
Time Frame: 7 days
|
For each participant with Allergic Asthma, a baseline airway epithelial brushing was performed, allergen was instilled into one segment of the lung, and diluent (control) was instilled into another segment.
Both segments were brushed for epithelial cells 7 days later.
After processing the brushes to RNA and generating RNA sequencing data, the RNA transcript read counts for each gene underwent variance stabilized log normalization.
Then we built a regression model which estimated the difference in miRNA read count in the allergen challenged as compared to the baseline sample and the difference in miRNA read count in the diluent challenged segment as compared to baseline for each participant.
The change from baseline read count for each miRNA in the allergen samples was compared to the change in the diluent samples and statistical significance was assessed using the unadjusted p-value(<0.05).
The direction of change does not have clinical significance; this was a mechanistic study.
|
7 days
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Prescott G Woodruff, MD, MPH, University of California, San Francisco
Publications and helpful links
Helpful Links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Respiratory Tract Diseases
- Immune System Diseases
- Lung Diseases
- Hypersensitivity, Immediate
- Bronchial Diseases
- Lung Diseases, Obstructive
- Respiratory Hypersensitivity
- Hypersensitivity
- Asthma
- Physiological Effects of Drugs
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Autonomic Agents
- Peripheral Nervous System Agents
- Cholinergic Agents
- Cholinergic Agonists
- Respiratory System Agents
- Miotics
- Parasympathomimetics
- Bronchoconstrictor Agents
- Muscarinic Agonists
- Methacholine Chloride
Other Study ID Numbers
- 14-14224
- 5U19AI077439 (U.S. NIH Grant/Contract)
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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