AgingNCT00336232
Determinants of Vitamin K Metabolism
A study testing Vitamin K in people with Aging and Osteoporosis, run by Tufts University at 1 site in United States.
Trial summary
The purpose of this study is to learn how the body responds to different amounts of vitamin K in the diet in order to understand the roles that vitamin K may have in the body. We also need to determine if older adults need more or less vitamin K in their diet compared to younger adults in order to maintain normal body… Read more about this study
- Who is it for?
- Ages 18 to 90 yearsHealthy volunteers can take part
- Conditions the study is for
- Aging, Osteoporosis
- What is being tested?
- Vitamin K
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 59 participants
- Where
- 1 siteUnited States
- Study dates
- May 2006to Jul 2009
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 90 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- -
Who cannot join
- kidney, GI, or liver disease requiring treatment
- prescribed osteoporosis medications in the previous 3 months
- use of acid reducers more than twice per week
- blood clotting disorder and/or abnormal clotting time
- warfarin or anticoagulant use in the previous 12 months
- diabetes
Show all 10Show fewer
- smoking
- hormone therapy in the previous 3 months
- oral contraceptive use in the previous 3 months; pregnancy
- strict vegetarian diet
Trial locations and contacts
1 site in 1 country.
United States1 site
Jean Mayer United States Department of Agriculture Human Nutrition Research Center on Aging at Tufts University
Boston, Massachusetts, 02111
About this study
Official title: Dietary and Non-dietary Components of Vitamin K Metabolism
The purpose of this study is to learn how the body responds to different amounts of vitamin K in the diet in order to understand the roles that vitamin K may have in the body. We also need to determine if older adults need more or less vitamin K in their diet compared to younger adults in order to maintain normal body stores of vitamin K.
Read the detailed description
Vitamin K has a role in bone health, but little is known about vitamin K metabolism in aging and in maintenance of bone mass. The limited understanding of vitamin K metabolism impedes the establishment of dietary recommendations for vitamin K, and the interpretation of results from clinical trials on vitamin K supplementation and bone health of women in a narrow age group. This study is the first to assess the role of dietary and other factors that influence the response to vitamin K status and bone turnover to vitamin K depletion and repletion in adults. This study also compares the absorption efficiency and body retention of vitamin K relative to current vitamin K status. Men and women [21 younger (18-40y) and 21 older (55+y)] will participate in a 62-d metabolic study, with a 5d run-in period, followed by a 28d dietary vitamin K restriction period (10 ug/d), and ending with a 28d dietary vitamin K supplementation period (500 ug/d). Coagulation times will be monitored during the dietary restriction period. Serial measurements of vitamin K status markers and of bone turnover markers will show the response of vitamin K to dietary manipulation for both age groups under identically controlled dietary conditions. Deuterium-labeled vitamin K in collards will be used to compare the absorption of vitamin K during a vitamin K-deplete state to that of a vitamin K-replete state. Vitamin K is transported in triglyceride-rich lipoproteins, which may vary among individuals due to differences in adiposity and lipid homeostasis. Therefore, measurement of body composition by Dual Energy X-Ray Absorptiometry (DXA) and plasma lipids will provide insight into the role of lipids in absorption and transport of vitamin K. The findings of this study are critical for the interpretation of the epidemiologic and clinical data used to determine the protective role vitamin K may have in chronic disease prevention.
- Conditions
- Aging, Osteoporosis
- Being tested
- Vitamin K
- Keywords
- Vitamin K metabolism, Bone health, Metabolism
- Medical subject headings
- Osteoporosis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Vitamin KDrug
Also called phylloquinone
phylloquinone (vitamin K1) 500 mcg daily in third month
| Study group | Role | What they receive |
|---|---|---|
| Diet Intervention | Experimental | 28 day diet low vitamin K, 28 day diet high vitamin K Receives: Drug: Vitamin K |
What is being measured
The primary outcome is the main question the study is designed to answer.
Plasma Phylloquinone
Plasma phylloquinone in response to phylloquinone depletion and repletion
Measured: 2 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted13 Jun 2006 (estimated)
- Study startMay 2006
- Primary completionJul 2009
- Study completionJul 2009
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (7)Papers the sponsor has linked to this study.
- Other trials for AgingStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 59 participants (actual)
Sponsor and investigators
- Lead sponsor
- Tufts University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Sarah Booth, Tufts University
- Investigators
- Sarah L Booth, PhD, Principal investigator, Tufts Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00336232
- Sponsor's protocol ID
- R01DK069341
- Status last verified
- Nov 2023
- First submitted
- 12 Jun 2006
- Last updated
- 29 Nov 2023
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- Individual data sharing
- Yes
Publications
Harrington DJ, Soper R, Edwards C, Savidge GF, Hodges SJ, Shearer MJ. Determination of the urinary aglycone metabolites of vitamin K by HPLC with redox-mode electrochemical detection. J Lipid Res. 2005 May;46(5):1053-60. doi: 10.1194/jlr.D400033-JLR200. Epub 2005 Feb 1.
PubMed 15722567Erkkila AT, Lichtenstein AH, Dolnikowski GG, Grusak MA, Jalbert SM, Aquino KA, Peterson JW, Booth SL. Plasma transport of vitamin K in men using deuterium-labeled collard greens. Metabolism. 2004 Feb;53(2):215-21. doi: 10.1016/j.metabol.2003.08.015.
PubMed 14767874Booth SL, Martini L, Peterson JW, Saltzman E, Dallal GE, Wood RJ. Dietary phylloquinone depletion and repletion in older women. J Nutr. 2003 Aug;133(8):2565-9. doi: 10.1093/jn/133.8.2565.
PubMed 12888638Booth SL, Lichtenstein AH, O'Brien-Morse M, McKeown NM, Wood RJ, Saltzman E, Gundberg CM. Effects of a hydrogenated form of vitamin K on bone formation and resorption. Am J Clin Nutr. 2001 Dec;74(6):783-90. doi: 10.1093/ajcn/74.6.783.
PubMed 11722960Traber MG, Leonard SW, Bobe G, Fu X, Saltzman E, Grusak MA, Booth SL. alpha-Tocopherol disappearance rates from plasma depend on lipid concentrations: studies using deuterium-labeled collard greens in younger and older adults. Am J Clin Nutr. 2015 Apr;101(4):752-9. doi: 10.3945/ajcn.114.100966. Epub 2015 Mar 4.
PubMed 25739929Truong JT, Fu X, Saltzman E, Al Rajabi A, Dallal GE, Gundberg CM, Booth SL. Age group and sex do not influence responses of vitamin K biomarkers to changes in dietary vitamin K. J Nutr. 2012 May;142(5):936-41. doi: 10.3945/jn.111.154807. Epub 2012 Mar 21.
PubMed 22437558Ellis JL, Fu X, Al Rajabi A, Grusak MA, Shearer MJ, Naumova EN, Saltzman E, Barger K, Booth SL. Plasma Response to Deuterium-Labeled Vitamin K Intake Varies by TG Response, but Not Age or Vitamin K Status, in Older and Younger Adults. J Nutr. 2019 Jan 1;149(1):18-25. doi: 10.1093/jn/nxy216.
PubMed 30590596
Study at a glance
From the registry record, last updated by the sponsor on 29 Nov 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Dietary and Non-dietary Components of Vitamin K Metabolism
- ClinicalTrials.gov ID
- NCT00336232
- Acronym / sponsor ID
- R01DK069341
- Conditions
- Aging, Osteoporosis
- Keywords
- Vitamin K metabolism, Bone health, Metabolism
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 59 participants (actual)
- Lead sponsor
- Tufts UniversityUniversity, hospital or other
- Study start
- May 2006
- Primary completion
- Jul 2009 (actual)
- Study completion
- Jul 2009 (actual)
- First posted
- 13 Jun 2006 (estimated)
- Results
- Posted 30 May 2016
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to learn how the body responds to different amounts of vitamin K in the diet in order to understand the roles that vitamin K may have in the body. We also need to determine if older adults need more or less vitamin K in their diet compared to younger adults in order to maintain normal body stores of vitamin K.
Detailed description
Vitamin K has a role in bone health, but little is known about vitamin K metabolism in aging and in maintenance of bone mass. The limited understanding of vitamin K metabolism impedes the establishment of dietary recommendations for vitamin K, and the interpretation of results from clinical trials on vitamin K supplementation and bone health of women in a narrow age group. This study is the first to assess the role of dietary and other factors that influence the response to vitamin K status and bone turnover to vitamin K depletion and repletion in adults. This study also compares the absorption efficiency and body retention of vitamin K relative to current vitamin K status. Men and women [21 younger (18-40y) and 21 older (55+y)] will participate in a 62-d metabolic study, with a 5d run-in period, followed by a 28d dietary vitamin K restriction period (10 ug/d), and ending with a 28d dietary vitamin K supplementation period (500 ug/d). Coagulation times will be monitored during the dietary restriction period. Serial measurements of vitamin K status markers and of bone turnover markers will show the response of vitamin K to dietary manipulation for both age groups under identically controlled dietary conditions. Deuterium-labeled vitamin K in collards will be used to compare the absorption of vitamin K during a vitamin K-deplete state to that of a vitamin K-replete state. Vitamin K is transported in triglyceride-rich lipoproteins, which may vary among individuals due to differences in adiposity and lipid homeostasis. Therefore, measurement of body composition by Dual Energy X-Ray Absorptiometry (DXA) and plasma lipids will provide insight into the role of lipids in absorption and transport of vitamin K. The findings of this study are critical for the interpretation of the epidemiologic and clinical data used to determine the protective role vitamin K may have in chronic disease prevention.
Study design
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Diet Intervention | Experimental | Drug: Vitamin K28 day diet low vitamin K, 28 day diet high vitamin K |
Who may qualify
- Ages
- 18 to 90 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- -
Key exclusion criteria (10 listed)
- kidney, GI, or liver disease requiring treatment
- prescribed osteoporosis medications in the previous 3 months
- use of acid reducers more than twice per week
- blood clotting disorder and/or abnormal clotting time
- warfarin or anticoagulant use in the previous 12 months
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Vitamin KAlso: phylloquinonephylloquinone (vitamin K1) 500 mcg daily in third month | Drug | Diet Intervention |
Primary outcome
Plasma Phylloquinone
Time frame: 2 months
Plasma phylloquinone in response to phylloquinone depletion and repletion
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Nov 2023.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Background: PubMed 15722567Harrington DJ, Soper R, Edwards C, Savidge GF, Hodges SJ, Shearer MJ. Determination of the urinary aglycone metabolites of vitamin K by HPLC with redox-mode electrochemical detection. J Lipid Res. 2005 May;46(5):1053-60. doi: 10.1194/jlr.D400033-JLR200. Epub 2005 Feb 1.
- Background: PubMed 14767874Erkkila AT, Lichtenstein AH, Dolnikowski GG, Grusak MA, Jalbert SM, Aquino KA, Peterson JW, Booth SL. Plasma transport of vitamin K in men using deuterium-labeled collard greens. Metabolism. 2004 Feb;53(2):215-21. doi: 10.1016/j.metabol.2003.08.015.
- Background: PubMed 12888638Booth SL, Martini L, Peterson JW, Saltzman E, Dallal GE, Wood RJ. Dietary phylloquinone depletion and repletion in older women. J Nutr. 2003 Aug;133(8):2565-9. doi: 10.1093/jn/133.8.2565.
- Background: PubMed 11722960Booth SL, Lichtenstein AH, O'Brien-Morse M, McKeown NM, Wood RJ, Saltzman E, Gundberg CM. Effects of a hydrogenated form of vitamin K on bone formation and resorption. Am J Clin Nutr. 2001 Dec;74(6):783-90. doi: 10.1093/ajcn/74.6.783.
- Results publication: PubMed 25739929Traber MG, Leonard SW, Bobe G, Fu X, Saltzman E, Grusak MA, Booth SL. alpha-Tocopherol disappearance rates from plasma depend on lipid concentrations: studies using deuterium-labeled collard greens in younger and older adults. Am J Clin Nutr. 2015 Apr;101(4):752-9. doi: 10.3945/ajcn.114.100966. Epub 2015 Mar 4.
- Results publication: PubMed 22437558Truong JT, Fu X, Saltzman E, Al Rajabi A, Dallal GE, Gundberg CM, Booth SL. Age group and sex do not influence responses of vitamin K biomarkers to changes in dietary vitamin K. J Nutr. 2012 May;142(5):936-41. doi: 10.3945/jn.111.154807. Epub 2012 Mar 21.
- Derived from this study: PubMed 30590596Ellis JL, Fu X, Al Rajabi A, Grusak MA, Shearer MJ, Naumova EN, Saltzman E, Barger K, Booth SL. Plasma Response to Deuterium-Labeled Vitamin K Intake Varies by TG Response, but Not Age or Vitamin K Status, in Older and Younger Adults. J Nutr. 2019 Jan 1;149(1):18-25. doi: 10.1093/jn/nxy216.
- Jean Mayer USDA Human Nutrition Research Center on Aging siteLink provided by the sponsor.
- Individual participant dataSharing planned: Yes
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Sarah L Booth, PhD principal investigator
Tufts Medical Center
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Vitamin K in people with Aging and Osteoporosis, run by Tufts University at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 29 Nov 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Yes. Results are posted in the registry (first posted 30 May 2016). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Plasma Phylloquinone (time frame: 2 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00336232, which also lists 7 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Nov 2023.