OSLO, NORWAY and METUCHEN, NJ – (August 16th, 2017) – A new study1 of renal transplant recipients, a group shown to express subclinical vitamin K deficiency, examined whether K2 supplementation would correct this deficiency and thus improve arterial stiffness. The study has published in Journal of the American Society of Hypertension, and the vitamin K2 used in the study was MenaQ7® Vitamin K2 as MK-7 from NattoPharma.
This Lebanese study evaluated in the KING trial (a single-arm pilot study) to see if there is an association between vitamin K2 supplementation and the change in both subclinical vitamin K status and indices of arterial stiffness among 60 renal transplant recipients with stable graft function. The results showed that 8 weeks of MK-7 supplementation (360 mcg/day as MenaQ7®) was associated with significant improvement in arterial stiffness and 24-hour peripheral and central pressures. The mean reduction in cfPWV was 1.4 m/s, which was well beyond the reduction of 1 m/s recommended for a clinically relevant vascular effect.
"While our previous cardiovascular study in healthy postmenopausal women showed an improvement in arterial elasticity after 3 years of supplementation, the results collected in this trial are staggering, especially as the statistically significant effect was seen very quickly," says Hogne Vik, chief medical officer of NattoPharma. "After just 8 weeks of MK-7 supplementation, low vitamin K status represented by dpucMGP level was significantly reduced by 55.1%. Moreover, supplementation was associated with a 14.2% reduction in mean cfPWV."
"One can assume that longer MK-7 supplementation may lead to even better results, and secure improvement in cardiovascular outcomes in renal transplant patients."
According to the researchers, prior observational studies have shown the prevalence of subclinical vitamin K deficiency has been reported to be as high as 80% in the renal transplant population. Moreover, in kidney transplant recipients, Vitamin K insufficiency, expressed as a high circulating level of dp-ucMGP (dephosphorylated-uncarboxylated matrix Gla protein, or “inactive” MGP, a K-dependent protein), is associated independently with increased risk of mortality. However, any studies to date have not addressed whether vitamin K supplementation may lead