Role of Indoor Pollutants on House Dust Mite Allergic Asthma

March 26, 2015 updated by: University Hospital, Strasbourg, France

Aldehyde and Nitrogen Dioxide at Homes: Measurement of the Exposure and Their Role on Allergic Asthma

It seems that the aldehydes and NO2, at the levels found indoor, could be the aggravating factors for an allergic response. However this effect has not been demonstrated. The investigators plan to study the effect of exposure to standard doses of these pollutants on the bronchial reactivity as measured by bronchial challenge tests with dust mite extract in volunteers asthmatic, allergic to house dust mite.

Study Overview

Status

Withdrawn

Conditions

Intervention / Treatment

Study Type

Interventional

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

  • France
      • Strasbourg, France, 67091
        • Unité de Pneumologie, d'Allergologie et de Pathologie Respiratoire de l'Environnement, Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg

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 50 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion criteria:

  • M/F 18-50 years of age
  • History of intermittent HDM allergic asthma-FEV1 > 80%
  • Non smokers or smokers with smoking < 10 PY

Exclusion criteria:

  • Persistent asthma and FEV1<80%
  • Allergic to pets and pets at home

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

  • Allocation: Randomized
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: Placebo
Other: Placebo (Exposure to indoor pollutants)
Exposure to indoor pollutants (placebo) in a randomized way, followed by bronchial challenge test with house dust mite extract.
Experimental: NO2
NO2 400 µg/m3
Other: Formaldehyde and NO2 (Exposure to indoor pollutants)
Exposure to indoor pollutants (Formaldehyde and NO2) in a randomized way, followed by bronchial challenge test with house dust mite extract.
Experimental: Formaldehyde
Formaldehyde 100 µg/m3
Other: Formaldehyde and NO2 (Exposure to indoor pollutants)
Exposure to indoor pollutants (Formaldehyde and NO2) in a randomized way, followed by bronchial challenge test with house dust mite extract.
Experimental: NO2 + Formaldehyde
mixture of Formaldehyde and NO2
Other: Formaldehyde and NO2 (Exposure to indoor pollutants)
Exposure to indoor pollutants (Formaldehyde and NO2) in a randomized way, followed by bronchial challenge test with house dust mite extract.

Collaborators and Investigators

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

Sponsor

University Hospital, Strasbourg, France

Investigators

  • Principal Investigator: Frederic DE BLAY, MD, Service de Pneumologie, Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg

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

December 7, 2022

Primary Completion

December 7, 2022

Study Completion

December 7, 2022

Study Registration Dates

First Submitted

November 23, 2009

First Submitted That Met QC Criteria

November 23, 2009

First Posted (Estimate)

November 25, 2009

Study Record Updates

Last Update Posted (Estimate)

March 27, 2015

Last Update Submitted That Met QC Criteria

March 26, 2015

Last Verified

March 1, 2015

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 3965

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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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