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Vitamin K2 Supplementation and Arterial Stiffness in the Renal Transplant Population (The KING Trial)

Vitamin K2 Supplementation and Effect on Arterial Stiffness Progression in the Renal Transplant Population

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02517580
Acronym
KING
Enrollment
60
Registered
2015-08-07
Start date
2015-03-31
Completion date
2016-05-31
Last updated
2018-02-09

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Arterial Stiffness, Vitamin K2 Deficiency

Brief summary

This study is a single arm, single center clinical trial that aims to evaluate the effect of 8 weeks of vitamin K2 replacement (360 mcg/day) on the progression of arterial stiffness in stable renal transplant patients.

Interventions

DIETARY_SUPPLEMENTVitamin K2 (MK7)

Sponsors

Omicron Pharmaceuticals
CollaboratorINDUSTRY
Lebanese American University
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Functional renal graft * Stable renal function for at least 3 months prior to enrollment

Exclusion criteria

* History of thrombotic events * Diagnosed coagulopathy * Cardiovascular event in the past month prior to enrollment * Current or planned pregnancy * Lactation * Soy allergy * Concomitant or recent (past 6 months) use of supplements that contain vitamin K * Warfarin treatment * Known intestinal malabsorption or hypomotility syndromes

Design outcomes

Primary

MeasureTime frame
Reduction From Baseline in Carotid-femoral Pulse Wave Velocity at 8 Weeks8 weeks

Secondary

MeasureTime frame
Change From Baseline in Central Pressure by Ambulatory Hemodynamic Measurement (Mobil-O-Graph) at 8 Weeks8 weeks
Change From Baseline in Augmentation Index by Ambulatory Hemodynamic Measurement (Mobil-O-Graph) at 8 Weeks8 weeks
Change From Baseline in Blood Concentration of Dephosphorylated-uncarboxylated Matrix Gla Protein (Dp-ucMGP) at 8 Weeks8 weeks

Countries

Lebanon

Participant flow

Participants by arm

ArmCount
Vitamin K2 (MK7)
Vitamin K2 (MK7) 360 mcg/day PO once daily for 8 weeks
60
Total60

Baseline characteristics

CharacteristicVitamin K2 (MK7)
Age, Continuous49.7 years
STANDARD_DEVIATION 10.4
Race and Ethnicity Not Collected— Participants
Region of Enrollment
Lebanon
60 participants
Sex: Female, Male
Female
26 Participants
Sex: Female, Male
Male
34 Participants
Transplantation duration15.9 years
STANDARD_DEVIATION 6

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
0 / 60
other
Total, other adverse events
12 / 60
serious
Total, serious adverse events
0 / 60

Outcome results

Primary

Reduction From Baseline in Carotid-femoral Pulse Wave Velocity at 8 Weeks

Time frame: 8 weeks

ArmMeasureValue (MEAN)Dispersion
Vitamin K2 (MK7)Reduction From Baseline in Carotid-femoral Pulse Wave Velocity at 8 Weeks-1.4 m/sStandard Error 0.2
Secondary

Change From Baseline in Augmentation Index by Ambulatory Hemodynamic Measurement (Mobil-O-Graph) at 8 Weeks

Time frame: 8 weeks

Secondary

Change From Baseline in Blood Concentration of Dephosphorylated-uncarboxylated Matrix Gla Protein (Dp-ucMGP) at 8 Weeks

Time frame: 8 weeks

Secondary

Change From Baseline in Central Pressure by Ambulatory Hemodynamic Measurement (Mobil-O-Graph) at 8 Weeks

Time frame: 8 weeks

Source: ClinicalTrials.gov · Data processed: Mar 9, 2026