- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT01487005
Cardiovascular Effects of Exposure to Ozone (MOSES)
Multicenter Ozone Study in Elderly Subjects
Studienübersicht
Status
Bedingungen
Detaillierte Beschreibung
This multicenter study will investigate whether short-term exposure of elderly volunteers to ambient levels of O3 in a controlled exposure setting while intermittently exercising causes acute cardiovascular responses. The study is based on the suppositions that: 1) elderly people are a susceptible group for cardiovascular effects; and 2) effects are more likely with exercise.
The study will involve approximately 90 healthy volunteers aged ≥55 and ≤70 who meet strict criteria for inclusion. They will be exposed for 3 hours to clean air, 0.07 ppm O3 (near the current NAAQS), and 0.12 ppm O3 (a level measured in several locations in the US). A suite of cardiovascular and pulmonary endpoints will be measured on the day before the exposure and up to 22 hours after the exposures. The study is being conducted at three centers using a common protocol and common SOPs. Most the endpoints will be analyzed by core laboratories to reduce the variability in the results. A Data Coordination and Analysis Center will assemble all the data generated by the three centers and conduct the statistical analyses on the combined data sets.
The study has 3 main objectives:
- To determine the relationship of altered autonomic balance (measured as changes in heart rate and heart rate variability (HRV)), cardiac arrhythmia, and repolarization and ozone exposure.
- To identify instances of altered systemic vascular function [measured as brachial artery flow-mediated dilation (FMD)without and with nitroglycerin (NTG) when exposed to ozone.
- To identify pro-thrombotic vascular state (measured as increase in von Willebrand factor antigen in blood - primary endpoints) when exposed to ozone.
Additional objectives include:
- To identify any increase in micro particle-associated tissues factor (measured as number of particles and tissue factor activity) and platelet activation) in ozone exposure.
- To identify if markers of systemic oxidative stress and inflammation and any correlation with the cardiovascular effects and degree of airway injury (measured as CC16) and airway inflammatory effects (neutrophils and cytokines in induced sputum) in ozone exposure.
- To determine if cardiovascular effects in ozone exposure are correlated with airway inflammatory effects, but not lung function effects.
Studientyp
Einschreibung (Voraussichtlich)
Kontakte und Standorte
Studienorte
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California
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San Francisco, California, Vereinigte Staaten, 94143
- Rekrutierung
- University of California at San Francisco
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Kontakt:
- Hofer Wong
- Telefonnummer: 415-206-8951
- E-Mail: howong@sfghoem.ucsf.edu
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Hauptermittler:
- John Balmes, MD
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Massachusetts
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Watertown, Massachusetts, Vereinigte Staaten, 02472
- Aktiv, nicht rekrutierend
- New England Research Institutes, Inc.
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New York
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Rochester, New York, Vereinigte Staaten, 14642
- Rekrutierung
- University of Rochester
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Kontakt:
- Erika Little
- Telefonnummer: 585-275-4163
- E-Mail: erika_little@urmc.rochester.edu
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Hauptermittler:
- Mark Frampton, MD
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North Carolina
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Chapel Hill, North Carolina, Vereinigte Staaten, 27599
- Rekrutierung
- University of North Carolina At Chapel Hill
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Kontakt:
- Martha Almond
- Telefonnummer: 919-966-0759
- E-Mail: martha_almond@med.unc.edu
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Hauptermittler:
- Philip Bromberg, MD
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Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Probenahmeverfahren
Studienpopulation
Beschreibung
Inclusion Criteria:
- males and females of all ethnic backgrounds.
- Normal spirometry (FEV1 and FVC >75% of predicted and FEV1/FVC >0.65).
- Ability to complete the exposure exercise regimen chosen to induce a ventilation rate of 15 to 17 L/min/m2 without exceeding 80% of predicted maximal heart rate.
- Normal baseline 12-lead resting ECG, and absence of significant ST depression while performing the 15-minute required level of exercise targeted for the exposure period.
- Subjects must be able to avoid certain medication supplements listed for 1 week before the exposure.
Exclusion Criteria:
- Non-English speaking.
- Including, but not limited to as ascertained by the physicians: Subjects with chronic cardiovascular (such as ischemic heart disease) or respiratory (such as asthma or COPD) disease; diabetes, or other organ or system dysfunction; cerebrovascular disease; active psychiatric disorders that would interfere with the subject's ability to understand and participate in the study. Subjects who have tested positive for a disease that affects the immune system (such as HIV, lymphoma, leukemia) or current drug or alcohol abuse (defined as having more than 3 drinks per day or being unable to abstain from alcohol for 3 days).
- Subjects with atopy or allergic rhinitis will not be excluded as long as they do not require regular treatment with antihistamines or systemic steroids.
- Ever-smokers (smoked tobacco or marijuana during the last five years, or with history of >10 pack year for tobacco or > 1 joint year for marijuana, or living with a smoker who smokes inside the house).
- Subject having plasma cotinine level > 3ng/mL.
- BMI >35 or <18 (35 is the official cut off for class 1 obesity).
- Hypertension (defined as blood pressure >140 systolic or >90diastolic) or on anti-hypertension medications other than diuretics.
- Pregnancy or nursing (breastfeeding).
- On the following medications: prednisone, statins, beta-blockers, anticoagulants, current hormonal therapy, tamoxifen. Subjects will not be asked to discontinue needed prescription medications for the purpose of this study. If any of these medications becomes necessary during the course of the study, the subjects will be excluded. Use of other medications will be considered on an individual basis.
- Subjects taking aspirin or PDE5 inhibitors must be willing to abstain from these medications during the week preceding each exposure.
- Occupational exposures (exposed to high levels of vapors, dust, gases, or fumes on an on-going basis)
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Zeitperspektiven: Interessent
Kohorten und Interventionen
Gruppe / Kohorte |
|---|
|
elderly subjects
Healthy
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Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Change in endothelial function
Zeitfenster: Baseline (16 hours before exposure) and 4 hours after exposure
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Brachail artey flow-mediated dilation and nitroglycerin-mediated dilation
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Baseline (16 hours before exposure) and 4 hours after exposure
|
|
Change in heart rate variability
Zeitfenster: Baseline (0.5 hours before exposure) and 0.2, 2, and 21.5 after exposure
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measured with Holter monitor
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Baseline (0.5 hours before exposure) and 0.2, 2, and 21.5 after exposure
|
|
Change in prothrombotic vascular state
Zeitfenster: Baseline (17 hour before exposure) and 3.5 and 22 hours after exposure
|
Peripheral blood samples will be taken and stored as plasma for measurement of von Willenbrand Factor antigen
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Baseline (17 hour before exposure) and 3.5 and 22 hours after exposure
|
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Change in cardiac repolarization
Zeitfenster: Baseline (0.5 hours before exposure) and 0.2, 2, and 21.5 after exposure
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from Holter monitor
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Baseline (0.5 hours before exposure) and 0.2, 2, and 21.5 after exposure
|
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Change in markers of systemic inflammation
Zeitfenster: Baseline (17 hour before exposure) and 3.5 and 22 hours after exposure
|
Peripheral blood samples will be taken and stored as plasma for measurements of inflammatory markers
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Baseline (17 hour before exposure) and 3.5 and 22 hours after exposure
|
|
Change in lung function
Zeitfenster: Baseline (0.2 hours before exposure) and 0.5, 3, and 22.5 hours after exposure
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Spirometry
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Baseline (0.2 hours before exposure) and 0.5, 3, and 22.5 hours after exposure
|
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Lung inflammation
Zeitfenster: 22 hours after exposure
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A sputum sample will be obtained and stored for measurement of inflammatory mediators
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22 hours after exposure
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Mitarbeiter und Ermittler
Sponsor
Mitarbeiter
Ermittler
- Hauptermittler: Anne Stoddard, PhD, HealthCore-NERI
Publikationen und hilfreiche Links
Allgemeine Veröffentlichungen
- Rich DQ, Thurston SW, Balmes JR, Bromberg PA, Arjomandi M, Hazucha MJ, Alexis NE, Ganz P, Zareba W, Thevenet-Morrison K, Koutrakis P, Frampton MW. Do Ambient Ozone or Other Pollutants Modify Effects of Controlled Ozone Exposure on Pulmonary Function? Ann Am Thorac Soc. 2020 May;17(5):563-572. doi: 10.1513/AnnalsATS.201908-597OC.
- Arjomandi M, Balmes JR, Frampton MW, Bromberg P, Rich DQ, Stark P, Alexis NE, Costantini M, Hollenbeck-Pringle D, Dagincourt N, Hazucha MJ. Respiratory Responses to Ozone Exposure. MOSES (The Multicenter Ozone Study in Older Subjects). Am J Respir Crit Care Med. 2018 May 15;197(10):1319-1327. doi: 10.1164/rccm.201708-1613OC.
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn
Primärer Abschluss (Voraussichtlich)
Studienabschluss (Voraussichtlich)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Schätzen)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Schätzen)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Andere Studien-ID-Nummern
- 10-01-4
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