Clinical Trials Logo

Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT00774514
Other study ID # Dnr 08-113M
Secondary ID
Status Completed
Phase N/A
First received October 16, 2008
Last updated April 8, 2009
Start date October 2008
Est. completion date December 2008

Study information

Verified date April 2009
Source University of Edinburgh
Contact n/a
Is FDA regulated No
Health authority Sweden: Regional Ethical Review Board
Study type Interventional

Clinical Trial Summary

Exposure to air pollution has been linked to increased cardiorespiratory morbidity and mortality. The exact component of air pollution that mediates this effect is unknown, but the link is strongest for fine combustion derived particulate matter derived from traffic sources. It has been demonstrated that inhalation of diesel exhaust impairs vascular vasomotor tone and endogenous fibrinolysis. Recent studies using an inline retrofit particle trap to reduce the particulate component of exhaust have shown that filtering particles leads to a reversal of the endothelial dysfunction seen after diesel exhaust exposure, and have even suggested an augmentation of vascular function. This raises the question of the cardiovascular effects of the gaseous pollutants, the most abundant of which is nitrogen dioxide. In this study we plan to investigate the cardiovascular effects of nitrogen dioxide exposure.


Recruitment information / eligibility

Status Completed
Enrollment 12
Est. completion date December 2008
Est. primary completion date December 2008
Accepts healthy volunteers Accepts Healthy Volunteers
Gender Male
Age group N/A and older
Eligibility Inclusion Criteria:

- Healthy male volunteers

Exclusion Criteria:

- Current smokers

- Significant occupational exposure to air pollution

- Regular medication use

- Intercurrent illness

Study Design

Allocation: Randomized, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Investigator, Outcomes Assessor), Primary Purpose: Basic Science


Related Conditions & MeSH terms


Intervention

Procedure:
Forearm Vascular Study
Forearm venous occlusion plethysmography to measure forearm blood flow during intrabrachial infusion of vasodilators Acetylcholine (5-20 mg/min), sodium nitroprusside (2-8 µg/min), bradykinin (100-1000 pmol/min) and verapamil (10-100 µg/min)

Locations

Country Name City State
Sweden Umeå University Umeå

Sponsors (2)

Lead Sponsor Collaborator
University of Edinburgh Umeå University

Country where clinical trial is conducted

Sweden, 

Outcome

Type Measure Description Time frame Safety issue
Primary Forearm blood flow measured by venous occlusion plethysmography in response to intraarterial vasodilators (acetylcholine, sodium nitroprusside, bradykinin and verapamil) 4-6 hours after exposure No
Secondary Plasma t-PA concentrations after infusion of bradykinin During forearm study No
Secondary Exhaled nitric oxide 4-6 hours after exposure No
See also
  Status Clinical Trial Phase
Completed NCT02122198 - Vascular Mechanisms for the Effects of Loss of Ovarian Hormone Function on Cognition in Women N/A
Completed NCT04156711 - Remote Ischemic Preconditioning in Patients Undergoing Acute Minor Abdominal Surgery N/A
Recruiting NCT06133634 - Fisetin to Improve Vascular Function in Older Adults Phase 1/Phase 2
Completed NCT05872139 - Role of Mitochondrial-derived Oxidative Stress to Promote Vascular Endothelial Dysfunction in Non-exercisers With Aging N/A
Recruiting NCT04558450 - Covid-19 Effects on Arterial Stiffness and Vascular Aging (CARTESIAN) N/A
Terminated NCT03325933 - Resistance Training and Cardiometabolic Health N/A
Not yet recruiting NCT05939934 - Impact of the Mandibular Advancement Device on Sleep Apnea During CPAP Withdrawal N/A
Completed NCT02652975 - Anticancer Treatment of Breast Cancer Related to Cardiotoxicity and Dysfunctional Endothelium N/A
Recruiting NCT02334839 - The Association Between Severity of Hypertensive Disorder During Pregnancy and Endothelial Dysfunction N/A
Recruiting NCT02020044 - Outcome After Descemet Membrane Endothelial Keratoplasty (DMEK) and Ultra-thin Descemet Stripping Automated Endothelial Keratoplasty (DSAEK) N/A
Completed NCT01775865 - Targeting Inflammation to Treat Cardiovascular Aging Phase 2
Completed NCT01691404 - Study on the Effects of Epicatechin and Quercetin Supplementation on Vascular Function and Blood Pressure (FLAVO) N/A
Terminated NCT01412216 - The Effects of Sedentarism on Vascular Function, Inflammation, and Insulin Resistance Phase 2
Completed NCT01319344 - Effect of Eplerenone on Endothelial Function in Metabolic Syndrome Phase 3
Completed NCT00987974 - Short Term Statin Treatment and Endothelial Dysfunction Due to Ischemia and Reperfusion Injury Phase 4
Completed NCT00990730 - Atherosclerosis in Rheumatoid Arthritis N/A
Completed NCT00848302 - Endothelial Function in Human Arteries Early Phase 1
Completed NCT00532844 - A Phase 2, Pharmacokinetic (PK) Study of 6R-BH4 Alone or 6R-BH4 With Vitamin C in Subjects With Endothelial Dysfunction Phase 2
Completed NCT00376246 - Effect of Ezetimibe on Flow-mediated Brachial Artery Reactivity in Healthy Subjects Phase 4
Completed NCT00775099 - Combustion Derived Air Pollution and Vascular Function N/A