We updated the design of this site on September 25th. Learn more.
Show more
ClinicalTrials.gov
ClinicalTrials.gov Menu

Change in Airway Responsiveness After Allergen Exposure

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01699594
First Posted: October 3, 2012
Last Update Posted: April 9, 2015
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
University of Saskatchewan
  Purpose
Exposure to allergens changes the way the airway responds to some stimuli (methacholine). The investigators will look at whether or not exposure to allergens changes the way the airway responds to a different stimuli (mannitol) and compare that with the known stimuli (methacholine).

Condition Intervention
Allergic Asthma Drug: Mannitol Drug: Methacholine Chloride

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Allergen Induced Increase in Indirect Non-allergic Bronchial Reactivity

Resource links provided by NLM:


Further study details as provided by University of Saskatchewan:

Primary Outcome Measures:
  • Change from baseline in airway responsiveness three hours after allergen exposure [ Time Frame: Change from Baseline at 3 hours ]

Enrollment: 11
Study Start Date: October 2012
Study Completion Date: May 2014
Primary Completion Date: May 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Mannitol
This arm will assess the allergen induced change in airway responsiveness to mannitol bronchoprovocation.
Drug: Mannitol
Indirect bronchoprovocation agent being compared to direct bronchoprovocation agent (methacholine)
Other Name: Aridol
Active Comparator: Methacholine Chloride
This arm will assess the allergen induced change in airway responsiveness to methacholine bronchoprovocation.
Drug: Methacholine Chloride
Direct bronchoprovocation agent being compared to indirect bronchoprovocation agent (mannitol)
Other Name: Provocholine

  Eligibility

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • mild, allergic asthma
  • FEV1 greater than 70% predicted
  • methacholine PC20 less than or equal to 16mg/ml

Exclusion Criteria:

  • known sensitivity to mannitol or other excipient
  • diagnosis of any other respiratory or non respiratory disease/disorder that would preclude the individual from participating
  • recent thoracic, abdominal or eye surgery
  • recent allergen exposure (4 weeks), respiratory infection (6 weeks)
  • current immunotherapy
  • pregnancy
  • history of anaphylaxis
  • use of asthma therapies other than short acting beta agonist
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01699594


Locations
Canada, Saskatchewan
University of Saskatchewan
Saskatoon, Saskatchewan, Canada, S7N 0W8
Sponsors and Collaborators
University of Saskatchewan
Investigators
Principal Investigator: Donald W Cockcroft, MD University of Saskatchewan
  More Information

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: University of Saskatchewan
ClinicalTrials.gov Identifier: NCT01699594     History of Changes
Other Study ID Numbers: IIS-A-524
BioReb #10-227 ( Other Identifier: University of Saskatchewan )
First Submitted: October 1, 2012
First Posted: October 3, 2012
Last Update Posted: April 9, 2015
Last Verified: October 2013

Keywords provided by University of Saskatchewan:
asthma
allergies
mannitol
methacholine

Additional relevant MeSH terms:
Mannitol
Methacholine Chloride
Diuretics, Osmotic
Diuretics
Natriuretic Agents
Physiological Effects of Drugs
Miotics
Autonomic Agents
Peripheral Nervous System Agents
Parasympathomimetics
Bronchoconstrictor Agents
Respiratory System Agents
Muscarinic Agonists
Cholinergic Agonists
Cholinergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action