Diesel Exhaust Particles and Leukotriene Production

Withdrawn before enrolling

Conditions studied: Allergic Rhinitis

In brief

The purpose of this study is to measure the effects of allergens and/or diesel exhaust particles in the nose to learn more about allergic responses in individuals with cat allergic rhinitis.

Key facts

Study ID

NCT00915447

Run by

University of California, Los Angeles

People needed

0

Starts

2008-04-01

Expected to finish

2013-04-11

Last updated by the study team

2019-01-23

Who can join

Age: 18 and older, up to 65. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Age 18 to 65 years old.
• Positive prick (epicutaneous) skin test to standardized cat with a wheal equal to or greater than 3 mm and with a surrounding flare.
• Ability to give informed consent.

You may not qualify if…

• Pregnancy or breast-feeding. (Pregnancy and the period during breast feeding can affect nasal congestion and be a confounder in this regard.)
• Systemic corticosteroid use within the previous three months or anytime during the challenge protocol.
• Topical nasal corticosteroid use within the past month or anytime during the challenge protocol.
• Systemic antihistamines or decongestant use within past two weeks or anytime during the trial.
• Chronic sinusitis or chronic non-allergic rhinitis.
• Use of reserpine.
• Cigarette smoking within the past year or during the challenge protocol
• Use of topical nasal antihistamines, chromoglycolates (chromolyn, Cromlon®), decongestants or non-steroidal anti-inflammatory agents (NSIADS) within the preceding week or anytime during the challenge protocol.
• Present or treatment within the past 10 years with allergy immunotherapy (injections).
• Present or past treatment with anti-IgE therapy.
• Any unusual exposure to air pollutants (e.g., working as a diesel mechanic) that, in the opinion of the investigators, might compromise the individual's ability to participate in the study.
• Living arrangement where the subject has a cat dwelling within the subject's habitation.
• Any serious heart, lung, neurological or kidney disease that in the opinion of the investigators would impair the individual's ability to participate in the study.
• Use of asthma-required medications.

Where it is running

• University of California, Los Angeles — Los Angeles, California, United States

Full record on ClinicalTrials.gov

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