- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01286129
Nasal Allergen Challenge in Rhinitic Subjects
January 15, 2019 updated by: Laval University
Comparative Responses to Nasal Allergen Challenge in Allergic Rhinitic Subjects With or Without Asthma
Background: Nasal allergen challenge (NAC) is useful to study the pathophysiology of rhinitis, and multiple challenges may more adequately approximate natural exposure.
Objective: To determine the effect of 4 consecutive daily NAC, on clinical and inflammatory parameters in rhinitics with or without asthma.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
The study will be performed outside the pollen season.
On a baseline visit, 2 to 7 days prior to control challenge, allergy skin prick tests and methacholine inhalation test will be done.
Prior to first allergen challenge, skin titration will be done using tenfold dilutions of the allergen chosen for nasal challenges.
Subsequent to baseline visit, a control challenge will be done, followed, a week later, by repeated NACs.
NACs will be done over 4 consecutive days, in the morning.
Nasal peak inspiratory flows (NPIF), oral peak expiratory flows (PEF), and symptoms will be recorded at baseline and at regular intervals over 7 hours post-challenge on each challenge day.
Induced sputum and nasal lavage specimen will be obtained 7 hours following the control challenge and the first and last NAC.
Study Type
Interventional
Enrollment (Actual)
45
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
Quebec
-
Québec, Quebec, Canada, G1V 4G5
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Quebec
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 45 years (ADULT)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- To have a positive reaction to one or more allergen on prick tests.
- Non smokers
- No respiratory track infection for at least one month prior to the study.
- Positive reaction to cat hair and/or house dust mite (Dermatophagoides pteronyssinus) aeroallergens on allergy skin prick tests and report rhinitis symptoms when exposed to an environment containing this allergen.
- Asthmatic subjects using only inhaled beta-2 agonists on an as needed basis for their asthma treatment.
- Asthmatic subjects with a history of asthma of at least 6 months.
- Asthmatic subjects with PC20 methacholine lower or equal to 8 mg/ml.
- Allergic rhinitic subjects never experienced any asthma symptoms or took any asthma medication in the past.
- Allergic rhinitic subjects with a provocative concentration of methacholine (PC20 higher than 16 mg/ml.
Exclusion Criteria:
- Smokers or ex smokers less than 6 months or more than 10 pack-years.
- Asthmatic subjects using or used in the past 3 months inhaled or oral corticosteroids.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: PREVENTION
- Allocation: NON_RANDOMIZED
- Interventional Model: PARALLEL
- Masking: NONE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
ACTIVE_COMPARATOR: Allergic asthmatic
Subjects with allergic asthma will undergo nasal allergen provocations with either house dust mite or cat pelt.
|
Allergen sprayed into nostrils.
Allergen used will be house dust mite or cat allergen.
Allergens will be given in increasing ten-fold dilutions until a positive response occurs.
|
ACTIVE_COMPARATOR: Allergic rhinitic without asthma
Subjects with allergic rhinitis without asthma will undergo nasal allergen provocations with either house dust mite or cat pelt.
|
Allergen sprayed into nostrils.
Allergen used will be house dust mite or cat allergen.
Allergens will be given in increasing ten-fold dilutions until a positive response occurs.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Sputum Eosinophils Following Allergen Challenge
Time Frame: At 7 hours post first and last challenge compared to baseline
|
Eosinophil is an inflammatory cell found in the lungs.
Sputum is obtained from hypertonic inhalation.
patients expectorate in a sterile dish and mucus plugs are selected and treated to obtain cells.
cells are transferred on a slide and a differential count is obtained where eosinophils are counted.
|
At 7 hours post first and last challenge compared to baseline
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Nasal Lavage Eosinophils After Allergen Challenge
Time Frame: At 7 hours post first and last challenge compared to baseline
|
Change in nasal lavage eosinophil percentages in allergic asthmatic and allergic non asthmatic at baseline and at 7h post first and last challenge
|
At 7 hours post first and last challenge compared to baseline
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
November 1, 2005
Primary Completion (ACTUAL)
March 1, 2008
Study Completion (ACTUAL)
March 1, 2008
Study Registration Dates
First Submitted
January 13, 2011
First Submitted That Met QC Criteria
January 27, 2011
First Posted (ESTIMATE)
January 31, 2011
Study Record Updates
Last Update Posted (ACTUAL)
February 1, 2019
Last Update Submitted That Met QC Criteria
January 15, 2019
Last Verified
January 1, 2019
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Infections
- Respiratory Tract Infections
- Respiratory Tract Diseases
- Immune System Diseases
- Lung Diseases
- Hypersensitivity, Immediate
- Bronchial Diseases
- Otorhinolaryngologic Diseases
- Lung Diseases, Obstructive
- Respiratory Hypersensitivity
- Hypersensitivity
- Nose Diseases
- Asthma
- Rhinitis
- Rhinitis, Allergic
Other Study ID Numbers
- FP-2005-3
- CER1223 (OTHER: Ethics committee)
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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