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Cardiovascular Effects of Oligomeric Procyanidins (OPCs) in Smokers (INC001)
This study has been completed.
Sponsor:
Maastricht University Medical Center
Information provided by (Responsible Party):
Antje Weseler, Maastricht University Medical Center
ClinicalTrials.gov Identifier:
NCT00742287
First received: August 26, 2008
Last updated: October 28, 2011
Last verified: October 2011
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Purpose
Smoking has been identified as a key risk factor for the development of cardiovascular diseases (CVD). It was found that a persistent increase in levels of oxidative stress and prolonged inflammation play a pivotal role in the pathogenesis of smoking associated CVD. Oligomeric proanthocyanidins (OPCs) are widely known for their anti-oxidant and anti-inflammatory effects, in vitro and in vivo. However, there are hardly any studies available that systematically investigated their acute and long-term effects on vascular function as well as on established biomarkers of oxidative stress and inflammation in an "at risk" population such as smokers.
Therefore, the aim of the present study is to investigate the effects of an eight-week supplementation with OPCs on vascular function as well as biomarkers of oxidative stress and inflammation in blood of smokers.
| Condition | Intervention |
|---|---|
| Smoking | Dietary Supplement: oligomeric proanthocyanidins (MASQUELIER'S Original OPCs) Dietary Supplement: Placebo |
| Study Type: | Interventional |
| Study Design: | Allocation: Randomized Intervention Model: Parallel Assignment Masking: Double Blind (Participant, Investigator) Primary Purpose: Prevention |
| Official Title: | The Effects of Oligomeric Procyanidins (OPCs) on Vascular Function, Biomarkers of Oxidative Stress and Inflammation in Smokers: a Pilot Study |
Resource links provided by NLM:
Further study details as provided by Antje Weseler, Maastricht University Medical Center:
Primary Outcome Measures:
- Vasoreactivity of conduit arteries by means of flow mediated dilation (FMD) [ Time Frame: before start of intervention and at the end of the 8 week of intervention ]
Secondary Outcome Measures:
- Endothelium-dependent and -independent reactivity of microvasculature by means of Laser Doppler flowmetry (LDF) [ Time Frame: before start of intervention, after 4 and 8 weeks of intervention ]
- Plasma nitrite and nitrate levels [ Time Frame: before start of intervention, after 4 and 8 weeks of intervention ]
- Systemic oxidative stress markers such as plasma levels of PGF2alpha and TEAC, GSH erythrocyte levels and gene expression of redox enzymes [ Time Frame: before start of intervention, after 4 and 8 weeks of intervention ]
- Systemic inflammation markers such as plasma levels of hsCRP, fibrinogen and cytokines, as well as gene expression levels of the latter [ Time Frame: before start of intervention, after 4 and 8 weeks of intervention ]
| Enrollment: | 28 |
| Study Start Date: | February 2009 |
| Study Completion Date: | November 2009 |
| Primary Completion Date: | November 2009 (Final data collection date for primary outcome measure) |
| Arms | Assigned Interventions |
|---|---|
|
Placebo Comparator: 1
placebo
|
Dietary Supplement: Placebo
placebo
|
|
Active Comparator: 2
200 mg oligomeric proanthocyanidins (MASQUELIER'S Original OPCs)
|
Dietary Supplement: oligomeric proanthocyanidins (MASQUELIER'S Original OPCs)
200 mg oligomeric proanthocyanidins (MASQUELIER'S Original OPCs) per day over 8 weeks
|
Eligibility| Ages Eligible for Study: | 30 Years to 60 Years (Adult) |
| Sexes Eligible for Study: | Male |
| Accepts Healthy Volunteers: | Yes |
Criteria
Inclusion Criteria:
- healthy male subjects smoking ≥ 10 cigarettes per day with a regular smoking history of ≥ 5 years
- BMI ≥ 20 and ≤ 27 kg/m2
Exclusion Criteria:
- Occurence of any adverse event, in particular those which require the use of medication that might interfere with the effects and/or the uptake of the investigational products
- Intolerance of study products
- Occurence of a serious adverse event
- Use of supplements, functional foods and/or other products containing vitamins, antioxidants and polyphenolic compounds or other ingredients with potential influence on vessel function for at least one month before the beginning of the study and during the entire study
- Use of a medically prescribed diet or slimming diet
- Vegetarian or vegan lifestyle
- Excessive alcohol consumption (< 28 consumptions (approximately 250 g alcohol) per week)
- Participation in a clinical trial within 4 weeks before the study
- Non-compliance with the demands of the study
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00742287
Please refer to this study by its ClinicalTrials.gov identifier: NCT00742287
Locations
| Netherlands | |
| Maastricht University | |
| Maastricht, Netherlands, 6200 MD | |
Sponsors and Collaborators
Maastricht University Medical Center
Investigators
| Principal Investigator: | Antje R Weseler, PhD | Maastricht University |
| Study Chair: | Aalt Bast, PhD, Prof. | Maastricht University |
More Information
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
| Responsible Party: | Antje Weseler, Principal Investigator, Maastricht University Medical Center |
| ClinicalTrials.gov Identifier: | NCT00742287 History of Changes |
| Other Study ID Numbers: |
MEC 083056 |
| Study First Received: | August 26, 2008 |
| Last Updated: | October 28, 2011 |
Keywords provided by Antje Weseler, Maastricht University Medical Center:
|
smoking oligomeric proanthocyanidins polyphenols supplementation |
vascular function oxidative stress inflammation |
Additional relevant MeSH terms:
|
Procyanidin Proanthocyanidin Antioxidants Molecular Mechanisms of Pharmacological Action Protective Agents |
Physiological Effects of Drugs Antiprotozoal Agents Antiparasitic Agents Anti-Infective Agents |
ClinicalTrials.gov processed this record on June 22, 2017