- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT01799746
Mechanisms of Response to Diesel Exhaust in Subjects With Asthma
Aperçu de l'étude
Statut
Les conditions
Description détaillée
The investigators will also characterize selected polymorphisms in glutathione-S-transferase (GST) genes that have been implicated in susceptibility to air pollutants. Outcome measures will include lung function, bronchial responsiveness to bronchodilator, exhaled nitric oxide, induced sputum for inflammatory markers (IL6 and IL8), and exhaled breath condensate for nitrite, 8-isoprostane, 20-HETE (20-hydroxyeicosatetraenoic acid), nitrotyrosine and pH.
In this pilot project, parallel studies are being carried out in the human exposure chambers at two NIEHS centers, the EOHSI-CEED (Environmental and Occupational Health Sciences Institute- Center for Environmental Exposure and Disease) and the Penn-CEET (University of Pennsylvania-Center of Excellence in Environmental Toxicology). The joint project will enable each center to validate research results in a second population and include new biomarkers of pulmonary inflammation. Each center will recruit, consent, and collect data on its own subjects. Only de-identified data will be shared between the centers.
Type d'étude
Contacts et emplacements
Lieux d'étude
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Pennsylvania
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Philadephia, Pennsylvania, États-Unis, 19104
- Airways Biology Initiative at Penn Presbyterian Medical Center
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
Méthode d'échantillonnage
Population étudiée
La description
Inclusion Criteria:
- Subject is an adult male or female between 18 and 55 years of age inclusive.
- Subject must have a prior history of a physician's diagnosis of asthma with reversible airway obstruction (shown by a greater than 12% increase in FEV1 following bronchodilator; or a positive methacholine challenge done following the screening visit. If methacholine challenge is required for qualification, a physician will be on-site for the test. Subject's asthma has been stable for the past six months with no change in asthma therapy.
- The subject has been a non-smoker for the past year and should have less than a 10-pack year history.
- Subject must be free of other significant pulmonary diseases (i.e., cystic fibrosis, tuberculosis, interstitial lung disease and bronchopulmonary dysplasia.
- The subject must be capable of and willing to provide written informed consent.
- The subject is able to understand and comply with protocol requirements and timetables, instructions and protocol-stated restrictions.
The subject has no significant DE exposure that would include occupations such as truck driver, heavy equipment operator and railroad maintenance.
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Exclusion Criteria:
- As a result of the medical interview, physical examination or screening investigations, the physician responsible considers the volunteer unfit for the study.
- The subject has received an investigational drug or participated in any other research trial within 30 days or five half-lives or twice the duration of the biological effect of any drug (whichever is longer) prior to the current study.
- Oral steroids within the last 6 months.
- Less than 12% FEV1 response to bronchodilator or negative methacholine challenge.
- Hospital admission for asthma in past 6 months.
- The subject has a history of alcohol or drug abuse within the last 5 years.
- The subject has history of hepatitis B, hepatitis C or HIV virus.
- The subject has a history of cardiovascular disease including hypertension or says yes to one of the cardiovascular risk questions on the screening questionnaire.
- The subject has a history of diabetes.
- The subject is pregnant or lactating.
The subject has daily exposure to DE, i.e., trucking or heavy machine operators.
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Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Délai |
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FEV1 response to bronchodilator, following DE compared with filtered air (primary outcome)
Délai: Up to 3 weeks
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Up to 3 weeks
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Mesures de résultats secondaires
Mesure des résultats |
Délai |
---|---|
Exhaled nitric oxide
Délai: Up to 3 weeks
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Up to 3 weeks
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8-isoprostane in exhaled breath condensate
Délai: 1 year
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1 year
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Nitrite in exhaled breath condensate
Délai: 1 year
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1 year
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pH in exhaled breath condensate
Délai: 1 year
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1 year
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20-HETE(20-hydroxyeicosatetraenoic acid)levels in exhaled breath condensate
Délai: 1 year
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1 year
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Cell differential in induced sputum
Délai: 1 year
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1 year
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Glutathione-S-transferase (GST)polymorphisms
Délai: Visit 1
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Visit 1
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Peak Flow
Délai: Up to 3 weeks
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Up to 3 weeks
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Forced Vital Capacity (FVC)
Délai: Up to 3 weeks
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Up to 3 weeks
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FEV1/FVC ratio
Délai: Up to 3 weeks
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Up to 3 weeks
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Collaborateurs et enquêteurs
Parrainer
Collaborateurs
Les enquêteurs
- Chercheur principal: Reynold A Panettieri, Jr., MD, University of Pennsylvania
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- 817330
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
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