- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01967459
Effects Vitamin D Suppletion on Postprandial Leukocyte Activation (DOSFEM)
Effects of High and Low Dose Vitamin D Suppletion on Postprandial Leukocyte Activation, Oxidative Stress and Vascular Function in Healthy Overweight and Obese Females
Study Overview
Status
Intervention / Treatment
Detailed Description
Rationale: Postprandial lipemia, known to be associated with acute leukocyte activation, impairs endothelial function and promotes atherosclerosis. Deficiency of vitamin D is associated with increased cardiovascular risk, but the precise mechanism is still unclear. A recent pilot study performed in our laboratory showed improved postprandial vascular function by pulse wave analysis and decreased postprandial leukocyte activation after vitamin D supplementation. Interestingly, the effects on leukocyte activation were solely found in females.
Hypothesis: The beneficial effects of vitamin D administration on postprandial leukocyte activation are mediated by suppression of oxidative stress. High doses of vitamin D may have a more pronounced effect than low doses.
Objective: To estimate the effect sizes of different doses of vitamin D on postprandial leukocyte activation markers, oxidative stress and arterial stiffness in vitamin D deficient females.
Study design: Randomized, double blind pilot study. Study population: Premenopausal overweight and obese female volunteers with proven vitamin D deficiency, ≥ 18 years of age.
Intervention: Two oral fat load tests (OFLTs) will be performed. After the first OFLT, volunteers will be randomly assigned to receive a single low dose (75 000 IU) or high dose (300 000 IU) of cholecalciferol drink. One week later the OFLT will be repeated.
Main study parameters/endpoints: Postprandial leukocyte activation, oxidative stress parameters and arterial augmentation index.
Nature and extent of the burden and risks associated with participation, benefit and group relatedness: The use of a single dose of 300 000 IU of cholecalciferol has been established to be a safe and effective way to correct vitamin D deficiency. Volunteers will be hospitalized on 2 different days (day 1, day 8) for approximately nine hours each day and receive an oral fat load. Cholecalciferol will be administered once. Volunteers will be instructed not to take vitamin D supplements during the study up until 3 months after the study. The volunteers' general practitioner will be informed on their participation. A total of 222ml (111ml for each postprandial test) of blood will be drawn. Volunteers will be allowed to drink only water during the tests. There is a theoretical risk of hypercalcemia but no excessive risk is involved. Volunteers receive 250 euros for full participation. Furthermore, volunteers will be told and given advice if they turn out to suffer from hyperlipidemia or any other condition.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Zuid-Holland
-
Rotterdam, Zuid-Holland, Netherlands, 3045 PM
- Sint Franciscus Gasthuis
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Age of 18 years or older;
- Pre-menopausal;
- BMI ≥25.0 kg/m2;
- Vitamin D deficiency, defined by a 25-hydroxyvitamin D level of <30ng/ml;
- Use of oral contraceptives.
Exclusion Criteria:
- The use of any kind of medication except oral contraceptives;
- Smoking;
- Pregnancy;
- Participation in a clinical study less than 6 months before inclusion;
- The use of (multi)vitamin supplements.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: High dose vitamin D
Volunteers assigned to this arm will receive a single dose of oral cholecalciferol 300 000 IU, in the form of 3 ml D-cura drink 100 000 IU/ml
|
Single dose D-cura cholecalciferol drink 100 000 IU/ml, in total 300 000 IU (=3ml)
Other Names:
Single dose D-cura cholecalciferol drink 250 000 IU/ml, in total 75 000 IU (=3ml)
Other Names:
|
Active Comparator: Low dose vitamin D
Volunteers assigned to this arm will receive a single dose of oral cholecalciferol 75000 IU, in the form of 3 ml D-cura drink 25 000 IU/ml
|
Single dose D-cura cholecalciferol drink 100 000 IU/ml, in total 300 000 IU (=3ml)
Other Names:
Single dose D-cura cholecalciferol drink 250 000 IU/ml, in total 75 000 IU (=3ml)
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
effect of vitamin D on leukocyte cluster of differentiation antigen 11b expression
Time Frame: 2, 4, 6 and 8 hours postprandial
|
the differential effect of 75 000 IU low dose vs. 300 000 IU high dose vitamin D on postprandial leukocyte activation markers cluster of differentiation antigen 11b
|
2, 4, 6 and 8 hours postprandial
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Effect of vitamin D on oxidative stress
Time Frame: 2,4,6 and 8 hours postprandial
|
the differential effect of 75 000 IU low dose vs. 300 000 IU high dose vitamin D on oxidative stress
|
2,4,6 and 8 hours postprandial
|
Effect of vitamin D on vascular function
Time Frame: 0,2,6,8 and 8 hours postprandial
|
the differential effect of 75 000 IU low dose vs. 300 000 IU high dose vitamin D on vascular function (Pulse Wave Velocity and Augmentation Index)
|
0,2,6,8 and 8 hours postprandial
|
Collaborators and Investigators
Sponsor
Investigators
- Study Chair: Manuel Castro Cabezas, MD, PhD, Sint Franciscus Gasthuis
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- NL44804.101.13
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Atherosclerosis
-
University Hospital, CaenUnknownPeripheral Arterial Disease | Atherosclerosis Obliterans | Atherosclerosis Right Leg | Atherosclerosis Left LegFrance
-
Nantes University HospitalAbbottCompletedAtherosclerosis ObliteransFrance
-
Central Hospital, Nancy, FranceSuspended
-
Federal University of São PauloCompletedAtherosclerosis of ArteryBrazil
-
MedtronicActive, not recruitingAtherosclerosis of Femoral Artery | Obstructive Disease | Atherosclerosis of Popliteal ArteryFrance
-
Cabinet de Medecine Interne Générale Demetrio PitarchCompletedAtherosclerosis of Artery
-
Emory UniversityThe Robert W. Woodruff FoundationCompleted
-
Korea UniversityMinistry of Health & Welfare, KoreaCompletedAtherosclerosis | Noninvasive Imaging of AtherosclerosisKorea, Republic of
-
Zhejiang Zylox Medical Device Co., Ltd.RecruitingAtherosclerosis of Femoral ArteryGermany
-
VA Office of Research and DevelopmentCompletedSaphenous Vein Graft AtherosclerosisUnited States
Clinical Trials on Cholecalciferol
-
Medical University of South CarolinaTerminatedVitamin D Deficiency | Nutritional DeficiencyUnited States
-
Centre of Postgraduate Medical EducationUnknownInfant, Premature, DiseasesPoland
-
Johns Hopkins UniversityNational Institute on Aging (NIA)TerminatedVitamin D Deficiency | FallsUnited States
-
Rashid Centre for Diabetes and ResearchCompletedObesity | Type 2 Diabetes Mellitus | Hypovitaminosis DUnited Arab Emirates
-
University of PittsburghNational Heart, Lung, and Blood Institute (NHLBI)CompletedCystic Fibrosis | Allergic Bronchopulmonary AspergillosisUnited States
-
University Hospitals Cleveland Medical CenterUniversity of Colorado, DenverCompletedInflammationUnited States
-
University Hospital, AngersMylan LaboratoriesCompleted
-
Medical University of South CarolinaEunice Kennedy Shriver National Institute of Child Health and Human Development... and other collaboratorsCompleted
-
Assistance Publique - Hôpitaux de ParisLaboratoire CrinexCompletedRenal Transplant Candidate for Right KidneyFrance