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Evaluation of Factors II, VII, IX, X, and Proteins C and S, Following High-dose Vitamin K Supplementation

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Stephan Moll, MD, University of North Carolina, Chapel Hill
ClinicalTrials.gov Identifier:
NCT01143831
First received: June 11, 2010
Last updated: June 11, 2012
Last verified: June 2012
History of Changes
  Purpose

The purpose of this study is to evaluate factor levels of the pro coagulant factors II, VII, IX, X, and the anticoagulant factors protein C and S in healthy volunteers during the intake of elevated levels of vitamin K in order to investigate whether there is any evidence that high dose vitamin K intake increases plasma coagulation factor activity.


Condition Intervention
Thrombosis
 Dietary Supplement: Vitamin K, 20mg

Study Type: Interventional
Study Design: Endpoint Classification: Pharmacokinetics Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Basic Science
Official Title: Evaluation of Factors II, VII, IX, X, and Proteins C and S, Following High-dose Vitamin K Supplementation

Resource links provided by NLM:

MedlinePlus related topics: Vitamin K
U.S. FDA Resources

Further study details as provided by University of North Carolina, Chapel Hill:

Primary Outcome Measures:
  • Change in levels and activities due to vitamin K supplementation [ Time Frame: 4 weeks ] [ Designated as safety issue: No ]
    Levels and activities to be recorded at three time points: Factor II, Factor VII, Factor IX, Factor X, D-dimer, TAT complexes, Protein C and S, thrombin generation potential


Enrollment: 8
Study Start Date: November 2009
Study Completion Date: March 2012
Primary Completion Date: March 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: All study participants
Three blood collections, one at baseline, one two weeks later, and the final blood collection 4 weeks from baseline, after taking Vitamin K orally for 14 days.
 Dietary Supplement: Vitamin K, 20mg
Subjects will take 20mg vitamin K by mouth in capsule form everyday for 14 continuous days.
Other Name: Carlson Vitamin K2 Menatetrenone, in 5mg capsules

Detailed Description:
  1. Recruit 8 male healthy individuals with no prior history of arterial or venous thrombosis (2 each from each of the following age ranges: 20-34, 35-49, 50-64, >65).
  2. Visit 1: Measure baseline activity levels of Factor II, Factor VII, Factor IX, Factor X, and levels of D-Dimer, TAT complexes, protein C and S activities. Also measure thrombin generation potential. Collaboration with a research laboratory will be sought to also determine factor VIIa levels.
  3. Visit 2: Measure activity of Factor II, Factor VII, Factor IX, Factor X, levels of D-Dimer, TAT complexes, protein C and S activities and thrombin generation potential at the end of the 2 week period.
  4. Have each individual consume 20 mg of Vitamin K2 orally per day for two weeks.
  5. Visit 3: Measure Factor II, Factor VII, Factor IX, Factor X, D-Dimer, TAT complexes, protein C and S activities and thrombin generation potential at the end of the 2 week period.
  6. Total length of study is 4 weeks.
  7. Analyze the data sets for changes in levels / activities due to Vitamin K supplementation.
  Eligibility

Ages Eligible for Study:   20 Years to 85 Years
Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Healthy adult male

Exclusion Criteria:

  • prior history of arterial or venous thrombosis
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT01143831

Locations
United States, North Carolina
University of North Carolina at Chapel Hill
Chapel Hill, North Carolina, United States, 27599
Sponsors and Collaborators
Stephan Moll, MD
Investigators
Principal Investigator: Stephan Moll, MD UNC Chapel Hill Department of Medicine, Division of Hematology
  More Information

No publications provided

Responsible Party: Stephan Moll, MD, Associate Professor, University of North Carolina, Chapel Hill
ClinicalTrials.gov Identifier: NCT01143831     History of Changes
Other Study ID Numbers: 09-1240
Study First Received: June 11, 2010
Last Updated: June 11, 2012
Health Authority: United States: Institutional Review Board

Keywords provided by University of North Carolina, Chapel Hill:
Vitamin K
Thrombosis

Additional relevant MeSH terms:
Thrombosis
Embolism and Thrombosis
Vascular Diseases
Cardiovascular Diseases
Protein C
Vitamin K
Menatetrenone
Vitamins
Anticoagulants
Hematologic Agents
Therapeutic Uses
 Pharmacologic Actions
Fibrinolytic Agents
Fibrin Modulating Agents
Molecular Mechanisms of Pharmacological Action
Cardiovascular Agents
Micronutrients
Growth Substances
Physiological Effects of Drugs
Antifibrinolytic Agents
Hemostatics
Coagulants

ClinicalTrials.gov processed this record on May 19, 2013