Airway and Pulmonary Vascular Endothelial Function in Healthy Smokers: Effect of Inhaled Glucocorticosteroid Treatment (smoker3)
調査の概要
状態
条件
詳細な説明
With this protocol the Investigators will test the hypotheses that a) there is a correlation between airway and pulmonary vascular endothelial function within the current smoker and non-smoker groups, and b) ICS treatment improves airway and pulmonary vascular endothelial function in the current smoker group.
Fifteen healthy current smokers with a >10 pack-year history of smoking and 15 healthy never-smokers will be enrolled. Males and females between 25 and 75 years of age will be recruited There will be 1-4 visits to the laboratory (one for non-smokers, 4 for smokers). All subjects will have the first visit. Current smokers will have 3 additional visits. Current smokers will be asked not to smoke before coming to the laboratory on the 3 study days. All subjects will be instructed to abstain from ingesting alcoholic beverages, coffee or caffeinated drinks for at least 12 hours the night before each study day. The subjects will also be instructed not to use PDE5 inhibitors for 24 hours before coming to the laboratory. On each study day, the protocol will start at the same time (in the morning).
研究の種類
入学 (実際)
段階
- 適用できない
連絡先と場所
研究場所
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Florida
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Miami、Florida、アメリカ、33136
- University of Miami School of Medicine
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- Fifteen healthy current smokers with a >10 pack-year history of smoking and 15 healthy never-smokers will be enrolled. Males and females between 25 and 75 years of age will be recruited.
Exclusion Criteria:
- Women of childbearing potential who do not use accepted birth control measures; pregnant and breast feeding women
- Cardiovascular disease and/or use of cardiovascular medications
- Subjects with known beta-adrenergic agonist intolerance
- A physician diagnosis of chronic airway disease (asthma, COPD, bronchiectasis, cystic fibrosis)
- Acute respiratory infection within four weeks prior to the study
- Use of any airway medication
- Abnormal pulmonary function
研究計画
研究はどのように設計されていますか？
デザインの詳細
- 割り当て：ランダム化
- 介入モデル：並列代入
- マスキング：ダブル
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
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実験的：smokers
participants with smoking history ( > 10 pack/year) will be enrolled and perform airway blood flow and echocardiogram before and 15 minutes after albuterol inhalation
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participants will performed echocardiogram before and 15 minutes after inhaled albuterol
participants will performed echocardiogram before and 15 minutes after inhaled albuterol
他の名前：
participant will be received a 4-week course of inhaled fluticasone (220 μg fluticasone twice a day administered as a MDI using a spacer)
participant will be received a 4-week course of identically appearing placebo (2 puffs twice a day via spacer).
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実験的：non-smokers
healthy life-time non smokers will be enrolled and perform airway blood flow and echocardiogram before and 15 minutes after albuterol inhalation
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participants will performed echocardiogram before and 15 minutes after inhaled albuterol
participants will performed echocardiogram before and 15 minutes after inhaled albuterol
他の名前：
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この研究は何を測定していますか？
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Airway Blood Flow
時間枠：before and 15 minutes after albuterol inhalation
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compare inhaled albuterol-induced changes in airway blood flow (ΔQaw) in healthy current smokers and lifetime non-smokers as an index of endothelial function in the airway circulation and to compare the results between smokers and non-smokers
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before and 15 minutes after albuterol inhalation
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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Echocardiogram
時間枠：MPAP before and 15 minutes after albuterol inhalation in smokers vs non-smokers
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to compare inhaled albuterol-induced changes in echocardiogram measuring mean pulmonary artery pressure (MPAP)in healthy current smokers and lifetime non-smokers as an index of endothelial function in the pulmonary circulation and to compare the results between smokers and non-smokers
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MPAP before and 15 minutes after albuterol inhalation in smokers vs non-smokers
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協力者と研究者
スポンサー
研究記録日
主要日程の研究
研究開始
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (見積もり)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。