Cocoa Flavanol Supplementation in Raynaud's Phenomenon
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ClinicalTrials.gov Identifier: NCT03815162 |
Recruitment Status :
Completed
First Posted : January 24, 2019
Last Update Posted : November 4, 2021
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Tracking Information | |||||
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First Submitted Date ICMJE | January 18, 2019 | ||||
First Posted Date ICMJE | January 24, 2019 | ||||
Last Update Posted Date | November 4, 2021 | ||||
Actual Study Start Date ICMJE | October 16, 2018 | ||||
Actual Primary Completion Date | April 30, 2020 (Final data collection date for primary outcome measure) | ||||
Current Primary Outcome Measures ICMJE |
Vasospasm [ Time Frame: 3 months ] frequency of vasospasm
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Original Primary Outcome Measures ICMJE | Same as current | ||||
Change History | |||||
Current Secondary Outcome Measures ICMJE |
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Original Secondary Outcome Measures ICMJE | Same as current | ||||
Current Other Pre-specified Outcome Measures | Not Provided | ||||
Original Other Pre-specified Outcome Measures | Not Provided | ||||
Descriptive Information | |||||
Brief Title ICMJE | Cocoa Flavanol Supplementation in Raynaud's Phenomenon | ||||
Official Title ICMJE | Pilot Study to Investigate the Effect of Cocoa Flavanols on Symptoms in Primary Raynaud's Phenomenon | ||||
Brief Summary | The study aims to investigate the effect that supplementing the diet with cocoa flavanols has on vasospasm symptoms and temperature regulation in women with primary Raynaud's phenomenon (PRP). Participants will be randomised to consume either high flavanol cocoa extract or low flavanol cocoa (placebo) daily for 3 months. | ||||
Detailed Description | Primary Raynaud's phenomenon (PRP) is characterised by periodic vasospasm of the fingers and toes precipitated by exposure to cold or emotional stimuli and stress. Previous studies have demonstrated that underlying this condition there can be vascular endothelium dysfunction. Pharmacological interventions used to relieve symptoms and complications in PRP include drugs targeted at increasing nitric oxide (NO; transdermal nitrates) levels. Cocoa derived products, rich in the phytonutrients 'flavanols', have been shown to increase the bioavailability of NO at the vascular endothelium and promote vasodilation, which may address an underlying cause of PRP and mitigate symptoms. Previous work carried out in the research group has indicated that the acute consumption of cocoa does not compromise the counter-regulatory responses to localised cold exposure in those with PRP. 30 individuals with PRP will be recruited. Those interested in taking part will attend a medical screening and consent visit. If recruited, a participant number will be assigned to them sequentially and they will be randomised to either experimental or control group, with neither the participants nor the research team knowing which group they have been allocated to. Participants will be asked to complete a diet diary before attending 4 further visits over a period of 3 months. Visit 1 (pre-intervention) and 4 (end of intervention); immediately on arrival, participants will be asked to lie semi-supine on a hospital bed. Skin temperature (surface thermocouples) and 'core' temperature (infrared tympanic thermometer) will start to be recorded to identify when these parameters have stabilized in room temperature (set at 25oC). Blood pressure will be taken using an arm cuff. Then a Finometer cuff will be attached to the left middle finger to record cardiovascular parameters (Blood pressure /heart rate/ cardiac output) and a laser Doppler probe will be attached to the dorsum of both index fingers to assess skin blood flow. Once the finger skin temperature has remained stable for 6 minutes, baseline Finometer and laser Doppler measurements will be recorded and the skin and 'core' temperature will be noted. Then, the right hand will be placed in a temperature regulated box which is set at an air temperature of 0oC. The hand will be cooled to a finger skin temperature of 15oC, then the box temperature will be modified to maintain the skin temperature at 15oC. The time that it takes for the skin temperature on the fingers to reach 15oC will be recorded. With the finger skin temperature stable at 15oC, Finometer and laser Doppler measurements will be repeated and the 'core' temperature at this point noted. Then, the hand will be removed from the chamber, and allowed to equilibrate in room temperature. The time taken for the skin temperature to reach stability will be recorded, as will the absolute temperature that it stabilises to. Measures above will be repeated once hand temperature is stable. Once these measures have been made, all equipment will be removed and a 15ml blood sample will be taken (for epicatechin, glucose and insulin analysis). The participant will be asked to complete 3 questionnaires (SF-36, Raynaud's symptoms and a food frequency questionnaire). Participants will also return a 4-day diet diary at visits 1 and 4, and their symptom diary at visit 4. Visits 2 (end of month 1) and 3 (end of month 2); participants will return a 4-day diet diary, symptom diary and any unused capsules. They will also have a resting blood pressure measurement made, weight measured and be asked to complete 3 questionnaires (SF-36, Raynaud's symptoms and a food frequency questionnaire). At the end of Visits 1, 2 and 3, participants will be given a months' supply of capsules, a symptom diary and a diet diary (to be completed in the week prior to the next visit). |
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Study Type ICMJE | Interventional | ||||
Study Phase ICMJE | Not Applicable | ||||
Study Design ICMJE | Allocation: Randomized Intervention Model: Parallel Assignment Intervention Model Description: Double-blinded, placebo controlled study. Block randomised with equal allocation of participants between groups. Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)Masking Description: Opaque capsules of equal size and appearance presented in similar bottles labelled only by a code. Code to product information is held by the manufacturer and un-blinding of the PI will only occur once the study analysis has been completed or in the event of a serious adverse event occurring. Primary Purpose: Prevention
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Condition ICMJE | Primary Raynaud Phenomenon | ||||
Intervention ICMJE |
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Study Arms ICMJE |
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Publications * |
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* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline. |
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Recruitment Information | |||||
Recruitment Status ICMJE | Completed | ||||
Actual Enrollment ICMJE |
27 | ||||
Original Estimated Enrollment ICMJE |
30 | ||||
Actual Study Completion Date ICMJE | July 31, 2021 | ||||
Actual Primary Completion Date | April 30, 2020 (Final data collection date for primary outcome measure) | ||||
Eligibility Criteria ICMJE | Inclusion Criteria:
Exclusion Criteria:
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Sex/Gender ICMJE |
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Ages ICMJE | 18 Years to 60 Years (Adult) | ||||
Accepts Healthy Volunteers ICMJE | Yes | ||||
Contacts ICMJE | Contact information is only displayed when the study is recruiting subjects | ||||
Listed Location Countries ICMJE | United Kingdom | ||||
Removed Location Countries | |||||
Administrative Information | |||||
NCT Number ICMJE | NCT03815162 | ||||
Other Study ID Numbers ICMJE | 112-1809 | ||||
Has Data Monitoring Committee | No | ||||
U.S. FDA-regulated Product |
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IPD Sharing Statement ICMJE |
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Current Responsible Party | Elizabeth Simpson, University of Nottingham | ||||
Original Responsible Party | Same as current | ||||
Current Study Sponsor ICMJE | University of Nottingham | ||||
Original Study Sponsor ICMJE | Same as current | ||||
Collaborators ICMJE | Not Provided | ||||
Investigators ICMJE |
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PRS Account | University of Nottingham | ||||
Verification Date | November 2021 | ||||
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP |