Bronchoprotection of Salbutamol in Asthma and Chronic Obstructive Pulmonary Disease

March 25, 2020 updated by: Don Cockcroft, University of Saskatchewan

Bronchoprotection of Salbutamol in Asthma and COPD

This study will investigate potential differences in how two puffs of salbutamol protects airway smooth muscle from contracting in people with asthma and chronic obstructive pulmonary disease (COPD).

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

In asthma, the administration (inhalation) of a selective β2 receptor agonist (e.g. salbutamol), prior to methacholine challenge has been shown to shift the dose response curve to the right and "bronchoprotect" the airway against airway smooth muscle contraction. The extent of β2 receptor agonist bronchoprotection in COPD is unknown.

Airway hyperresponsiveness (AHR) to direct acting agents such as histamine and methacholine is a feature of both asthma and COPD. In asthma, the abnormality leading to AHR is believed to be due to changes in airway smooth muscle (e.g. hypertrophy, hyperplasia, contractile apparatus) whereas in COPD the AHR is likely due to structural or geometric changes.

The investigators hypothesize that the bronchoprotection afforded by salbutamol against methacholine challenge will be greater in asthma than in COPD due to differences in underlying airway abnormalities.

Study Type

Interventional

Enrollment (Actual)

28

Phase

  • Phase 4

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

  • Canada
    • Saskatchewan
      • Saskatoon, Saskatchewan, Canada, S7N0W8
        • University of Saskatchewan

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

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • asthma or COPD

Exclusion Criteria:

  • asthma and COPD

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: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: salbutamol
There are two groups, asthma and COPD, which are being compared with respect to bronchoprotection from an active treatment (salbutamol).
Drug: salbutamol
200 micrograms salbutamol from MDI

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
methacholine PC20 dose shift
Time Frame: one hour
one hour

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Saskatchewan

Investigators

  • Principal Investigator: Donald Cockcroft, MD, University of Saskatchewan

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 (Actual)

February 1, 2007

Primary Completion (Actual)

July 1, 2010

Study Completion (Actual)

July 1, 2010

Study Registration Dates

First Submitted

February 22, 2007

First Submitted That Met QC Criteria

February 22, 2007

First Posted (Estimate)

February 26, 2007

Study Record Updates

Last Update Posted (Actual)

March 27, 2020

Last Update Submitted That Met QC Criteria

March 25, 2020

Last Verified

March 1, 2020

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Bio-REB 06-231

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

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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