- ICH GCP
- 미국 임상 시험 레지스트리
- 임상시험 NCT00775099
Combustion Derived Air Pollution and Vascular Function
The Effects of Combustion-Derived Air Pollution on Vascular Vasomotor and Fibrinolytic Function in Healthy Volunteers (Diesel Exposure)
Air pollution is a major cause of cardiovascular morbidity and mortality. The components of air pollution responsible and the mechanisms through which they might mediate these harmful effects remain only partially understood. The link between cardiovascular disease and air pollution is strongest for fine particulate matter. Fine particulate matter (PM) is produced from the combustion of fossil fuels with the most significant threat thought to be posed by small particles less than 10µm (PM 10) which can be inhaled into the lungs. We propose to identify the precise component of diesel exhaust that mediates the adverse cardiovascular effects using a carbon particle generator, and a particle concentrator. The aim of this study proposal is to assess the vascular effects of different types and components of air pollution in healthy subjects. We intend to test the hypotheses that:
- Combustion derived nanoparticulate causes an acute impairment of endothelial vasomotor and fibrinolytic function in healthy volunteers.
- Exposure to combustion derived air pollution is associated with increased thrombus formation.
연구 개요
연구 유형
등록 (실제)
단계
- 해당 없음
연락처 및 위치
연구 장소
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Edinburgh, 영국, EH16 4SB
- University of Edinburgh
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참여기준
자격 기준
공부할 수 있는 나이
- 어린이
- 성인
- 고령자
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
설명
Inclusion Criteria:
- Healthy volunteers
Exclusion Criteria:
- Current smokers
- Significant occupational exposure to air pollution
- History of lung disease
- Women of child-bearing potential
- Malignant arrhythmias
- Renal or hepatic failure
- Significant co-morbidity
- Systolic blood pressure >190 or <100 mmHg
- Previous history of blood dyscrasia
- Unable to tolerate the supine position
- Lack of informed consent
- Blood donation within last 3 months
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 주 목적: 기초 과학
- 할당: 무작위
- 중재 모델: 크로스오버 할당
- 마스킹: 삼루타
무기와 개입
참가자 그룹 / 팔 |
개입 / 치료 |
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실험적: Filtered Air Exposure
1 hour exposure to filtered air during intermittent exercise
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Forearm venous occlusion plethysmography to measure forearm blood flow during intra-arterial infusion of the vasodilators Verapamil (10-100 µg/min), bradykinin (100-1000 pmol/min), sodium nitroprusside (2-8 µg/min) and Acetylcholine (5-20 mg/min).
다른 이름들:
Ex-vivo assessment of thrombus formation using Badimon Chamber
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실험적: Diesel Exhaust Exposure
1 hour exposure to dilute diesel exhaust at a concentration of 300 µg/m3 during intermittent exercise
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Forearm venous occlusion plethysmography to measure forearm blood flow during intra-arterial infusion of the vasodilators Verapamil (10-100 µg/min), bradykinin (100-1000 pmol/min), sodium nitroprusside (2-8 µg/min) and Acetylcholine (5-20 mg/min).
다른 이름들:
Ex-vivo assessment of thrombus formation using Badimon Chamber
|
실험적: Filtered Diesel Exposure
1 hour exposure to diesel exhaust with all particulates filtered out using teflon filter with intermittent exercise
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Forearm venous occlusion plethysmography to measure forearm blood flow during intra-arterial infusion of the vasodilators Verapamil (10-100 µg/min), bradykinin (100-1000 pmol/min), sodium nitroprusside (2-8 µg/min) and Acetylcholine (5-20 mg/min).
다른 이름들:
Ex-vivo assessment of thrombus formation using Badimon Chamber
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실험적: PALAS Exposure
1 hour exposure to pure carbon particles produced by PALAS generator during intermittent exercise
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Forearm venous occlusion plethysmography to measure forearm blood flow during intra-arterial infusion of the vasodilators Verapamil (10-100 µg/min), bradykinin (100-1000 pmol/min), sodium nitroprusside (2-8 µg/min) and Acetylcholine (5-20 mg/min).
다른 이름들:
Ex-vivo assessment of thrombus formation using Badimon Chamber
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연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
기간 |
---|---|
Forearm blood flow measured by forearm venous occlusion plethysmography in response to infused vasodilators
기간: 6-8 hours after exposure
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6-8 hours after exposure
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2차 결과 측정
결과 측정 |
기간 |
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Ex-vivo thrombus formation assessed using the Badimon chamber
기간: 6 hours after exposure
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6 hours after exposure
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Arterial stiffness measured by radial artery tonometry
기간: Before and after exposure
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Before and after exposure
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Heart rate and heart rate variability measured with 3 lead Holter electrographic monitors
기간: During and for 24 hours after exposure
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During and for 24 hours after exposure
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Blood pressure
기간: During and after exposure and during forearm study
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During and after exposure and during forearm study
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Plasma t-PA and PAI concentrations following infusion of bradykinin
기간: During forearm study
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During forearm study
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Plasma inflammatory markers IL-6, TNF-alpha, IL-1 and hsCRP
기간: Before and after exposure
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Before and after exposure
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Platelet monocyte binding as measured by flow cytometry
기간: After the exposure
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After the exposure
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공동 작업자 및 조사자
수사관
- 수석 연구원: Nicholas L Mills, MB BCh MRCP, University of Edinburgh
간행물 및 유용한 링크
일반 간행물
- Mills NL, Tornqvist H, Robinson SD, Gonzalez M, Darnley K, MacNee W, Boon NA, Donaldson K, Blomberg A, Sandstrom T, Newby DE. Diesel exhaust inhalation causes vascular dysfunction and impaired endogenous fibrinolysis. Circulation. 2005 Dec 20;112(25):3930-6. doi: 10.1161/CIRCULATIONAHA.105.588962.
- Langrish JP, Watts SJ, Hunter AJ, Shah AS, Bosson JA, Unosson J, Barath S, Lundback M, Cassee FR, Donaldson K, Sandstrom T, Blomberg A, Newby DE, Mills NL. Controlled exposures to air pollutants and risk of cardiac arrhythmia. Environ Health Perspect. 2014 Jul;122(7):747-53. doi: 10.1289/ehp.1307337. Epub 2014 Mar 25.
연구 기록 날짜
연구 주요 날짜
연구 시작
기본 완료 (실제)
연구 완료 (실제)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (추정)
연구 기록 업데이트
마지막 업데이트 게시됨 (추정)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .
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