CClinicalTrials.gg
Status unknownNCT04900610VIKIPEDIAUpdated May 25, 2021

The Effect of Vitamin K2 Supplementation on Arterial Stifness and Cardiovascular Events in PEritonial DIAlysis

An interventional study of MenaQ7 ®, Nattopharma, ASA, Hovik, Norway in Vitamin K Deficiency, End Stage Renal Disease and Peritoneal Dialysis, sponsored by Aristotle University Of Thessaloniki. Status unknown. Open to participants aged 18 Years to 90 Years. Per ClinicalTrials.gov, last updated 2021-05-25.

Sponsored by Aristotle University Of Thessaloniki · Not applicable, Interventional, and Treatment

The sponsor has not verified this record recently (last verified May 2021), so the status shown — last known as Not yet recruiting — may be out of date.
Phase
Not applicable
Study type
Interventional
Enrollment
120
Allocation
Randomized
Ages
18 Years to 90 Years
Sex
All
01

Study summary

VIKIPEDIA is a multi-centre, placebo-controlled, randomized, open-label intervention clinical trial on Peritoneal Dialysis (PD) patients. At baseline the investigators will recruit End-Stage Renal Disease patients undergoing PD and randomize them to either daily per os supplementation of 1mg menaquinone-7 or placebo for 1.5 year. The investigators will study the effect of vitamin K2 supplementation (through normalization of dp-ucMGP) on arterial stifness and the occurence of cardiovascular events. The investigators will also cosider as secondary endpoints, mortality, central aortic blood pressure and indices of 24h-ambulatory blood pressure.

Read the detailed description

VIKIPEDIA is a multi-centre, placebo-controlled, randomized, open-label intervention clinical trial on PD patients. The study protocol was developed in accordance with the Helsinki Declaration of Human Rights and the Good Clinical Practice Guidelines and Standard Protocol Items: Recommendations for Intervention Trials, was approved by the Ethics Committee/Scientific Council of the Medical School of Aristotle University of Thessaloniki (235/14.05.2021) All participants will provide a structured, written, informed consent. Three university, tertiary hospitals in Northern Greece with major, referral PD units will participate in the study. The patients will be recruited within 1 year. At baseline, all eligible patients who have provided a written, informed consent will be enrolled in the study. Αortic stiffness and vitamin K status will be assessed by PWV and plasma dp-ucMGP levels respectively. Before randomization, the investigators will draw blood (serum and plasma) and PD fluid samples from all patients to measure blood count and routine biochemical parameters, including urea, creatinine, potassium, sodium, calcium, phosphorus, c-reactive protein, alkaline phosphatase, albumin, parathormone, 25-OH D3, magnesium, glycated hemoglobin, thyroid function hormones. Since both vitamin D and magnesium are considered of utmost importance in vitamin K metabolism, after baseline, patients with vitamin D and/or magnesium depletion will be treated with oral supplements to achieve normal levels of both elements, before randomization. The cohort will then be categorized to one of the two groups (placebo or active group) and the treatment period will last 1.5 years. To ensure that the two parallel groups will include patients that will not differ significantly in vitamin K and stiffness, patients will be accordingly stratified. After randomization, all patients will continue their routine, standard medical treatment and patients in the treatment group will additionally receive daily, per os 1 mg of vitamin K2 (MenaQ7 ®, Nattopharma, ASA, Hovik, Norway).

02

Conditions studied

  • Vitamin K Deficiency
  • End Stage Renal Disease
  • Peritoneal Dialysis
  • Arterial Stiffness
  • Cardiovascular Morbidity
  • Mortality

Keywords

  • Vitamin K
  • Menaquinone-7
  • Peritoneal dialysis
  • Arterial stifness
  • Cardiovascular
  • Chronic Kidney Disease
  • End Stage Renal Disease
03

In context

Kidney Diseases

3,840 studies on the registry are indexed under Kidney Diseases; 500 are open to participants now.

This study's planned enrollment of 120 is above the median of 70 across 2,640 interventional studies indexed under Kidney Diseases.

Browse Kidney Diseases studies →

Lead sponsor

Aristotle University Of Thessaloniki is the lead sponsor of 274 studies on the registry; 56 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 90 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Age ≥ 18 years
  • At least 3 months on PD
  • Life expectancy of ≥ 18 months

Exclusion criteria

Exclusion Criteria:

  • Liver disease
  • Drug or alcohol abuse
  • Pregnancy or breast-feeding
  • Treatment with phosphate binders (sevelamer)
  • Ongoing malignancy or severe inflammatory disease diagnosis
  • Use of vitamin K antagonist or vitamin K supplements during the past 3 months
  • Diagnosis of severe gut-disease (inflammatory or short bowel disease) or gastrointestinal malabsorption
  • Mental disorder rendering the patient unable to conform with the instructions and fully understand the nature, aim and possible side-effects of the supplementation
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
120 participants (estimated)

Study arms

  • Active comparator
    Vitamin K2

    1mg/day per os

    Dietary Supplement: MenaQ7 ®, Nattopharma, ASA, Hovik, Norway

  • Placebo comparator
    Placebo

    matching placebo

    Dietary Supplement: MenaQ7 ®, Nattopharma, ASA, Hovik, Norway

Interventions

  • Dietary supplementMenaQ7 ®, Nattopharma, ASA, Hovik, Norway

    daily per os supplementation of 1mg MK-7

06

What researchers measure

Primary outcomes

  1. Progression of arterial stifness

    Change in pulse wave velocity

    Time frame: 1.5 years

  2. Non fatal cardiovascular events

    Number of patients presenting acute myocardial infarction, acute coronary syndrome, embolism, peripheral arterial disease and stroke

    Time frame: 1.5 years

Secondary outcomes

  1. Mortality

    Number of participants who willl die from any cause

    Time frame: 1.5 years

  2. PD adequacy

    Number of patients with preserved residual renal function

    Time frame: 1.5 years

  3. PD clearance

    Change in Kt/V

    Time frame: 1.5 years

  4. Infections/peritonitis

    Rate of infections and peritonitis

    Time frame: 1.5 years

  5. Parathormone homeostasis

    Changes in serum parathormone

    Time frame: 1.5 year

  6. Calcium phosphorus homeostasis

    Changes in the calcium phosphorus product

    Time frame: 1.5 year

  7. Fractures

    Incidence of fractures

    Time frame: 1.5 years

  8. Joint/muscle pain

    Incidence of pain in muscles and/or joints

    Time frame: 1.5 years

  9. 24-hour ambulatory BP/aortic systolic BP

    Change in indices of ambulatory BP and aortic systolic blood pressure

    Time frame: 1.5 years

07

Study locations

No study locations are listed for this record.

08

References and documents

Publications

  • Roumeliotis S, Roumeliotis A, Dounousi E, Eleftheriadis T, Liakopoulos V. Vitamin K for the Treatment of Cardiovascular Disease in End-Stage Renal Disease Patients: Is there Hope? Curr Vasc Pharmacol. 2021;19(1):77-90. doi: 10.2174/1570161118666200320111745. PubMed 32196451 ↗
  • Roumeliotis S, Dounousi E, Eleftheriadis T, Liakopoulos V. Association of the Inactive Circulating Matrix Gla Protein with Vitamin K Intake, Calcification, Mortality, and Cardiovascular Disease: A Review. Int J Mol Sci. 2019 Feb 1;20(3):628. doi: 10.3390/ijms20030628. PubMed 30717170 ↗
  • Roumeliotis S, Dounousi E, Salmas M, Eleftheriadis T, Liakopoulos V. Vascular Calcification in Chronic Kidney Disease: The Role of Vitamin K- Dependent Matrix Gla Protein. Front Med (Lausanne). 2020 Apr 24;7:154. doi: 10.3389/fmed.2020.00154. eCollection 2020. PubMed 32391368 ↗
  • Xu Q, Guo H, Cao S, Zhou Q, Chen J, Su M, Chen S, Jiang S, Shi X, Wen Y. Associations of vitamin K status with mortality and cardiovascular events in peritoneal dialysis patients. Int Urol Nephrol. 2019 Mar;51(3):527-534. doi: 10.1007/s11255-019-02080-x. Epub 2019 Jan 28. PubMed 30689181 ↗
  • Peeters FECM, van Mourik MJW, Meex SJR, Bucerius J, Schalla SM, Gerretsen SC, Mihl C, Dweck MR, Schurgers LJ, Wildberger JE, Crijns HJGM, Kietselaer BLJH. Bicuspid Aortic Valve Stenosis and the Effect of Vitamin K2 on Calcification Using 18F-Sodium Fluoride Positron Emission Tomography/Magnetic Resonance: The BASIK2 Rationale and Trial Design. Nutrients. 2018 Mar 21;10(4):386. doi: 10.3390/nu10040386. PubMed 29561783 ↗
  • Haroon SW, Tai BC, Ling LH, Teo L, Davenport A, Schurgers L, Teo BW, Khatri P, Ong CC, Low S, Yeo XE, Tan JN, Subramanian S, Chua HR, Tan SY, Wong WK, Lau TW. Treatment to reduce vascular calcification in hemodialysis patients using vitamin K (Trevasc-HDK): A study protocol for a randomized controlled trial. Medicine (Baltimore). 2020 Sep 4;99(36):e21906. doi: 10.1097/MD.0000000000021906. PubMed 32899022 ↗
  • Vaios V, Georgianos PI, Vareta G, Dounousi E, Dimitriadis C, Eleftheriadis T, Papagianni A, Zebekakis PE, Liakopoulos V. Clinic and Home Blood Pressure Monitoring for the Detection of Ambulatory Hypertension Among Patients on Peritoneal Dialysis. Hypertension. 2019 Oct;74(4):998-1004. doi: 10.1161/HYPERTENSIONAHA.119.13443. Epub 2019 Aug 12. PubMed 31401878 ↗
  • Roumeliotis S, Roumeliotis A, Georgianos PI, Thodis E, Schurgers LJ, Maresz K, Eleftheriadis T, Dounousi E, Tripepi G, Mallamaci F, Liakopoulos V. VItamin K In PEritonial DIAlysis (VIKIPEDIA): Rationale and study protocol for a randomized controlled trial. PLoS One. 2022 Aug 17;17(8):e0273102. doi: 10.1371/journal.pone.0273102. eCollection 2022. PubMed 35976944 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 25, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04900610
Lead sponsor
Aristotle University Of Thessaloniki
Collaborators
Nattopharma ASA
Responsible party
Vaios Vasileios (Principal Investigator, Aristotle University Of Thessaloniki) — Principal investigator
First posted
May 25, 2021
Start date
Sep 2021 (estimated)
Primary completion
Jun 2022 (estimated)
Completion
Sep 2022 (estimated)
Last update
May 25, 2021

Study contacts

Stefanos Roumeliotis, MD, PhD
Contact
st_roumeliotis@hotmail.com
+302313303110
Vassilios Liakopoulos, Professor
Contact
liakopul@otenet.gr
+302313303110
Stefanos Roumeliotis, MD, PhD
principal investigator · 1st Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki
Vassilios Liakopoulos, Professor
principal investigator · 1st Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in May 2021. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion