There are inconsistent findings on the effects of vitamin K on bone mineral density (BMD) and undercarboxylated osteocalcin (UcOC). The present intervention study evaluated the effect in subjects over 60-yr-old. The vitamin K group (vitamin K + vitamin D + calcium supplement; 15 mg of vitamin K2 [menatetrenone] three times daily, 400 IU of vitamin D once a day, and 315 mg of calcium twice daily...

A high incidence of fractures, particularly of the hip, represents an important problem in patients with Alzheimer disease (AD), who are prone to falls and have osteoporosis. We previously found that vitamin K deficiency and low 25-hydroxyvitamin D (25-OHD) with compensatory hyperparathyroidism cause reduced bone mineral density (BMD) in female patients with AD. This may modifiable by intervent...

Because vascular or cardiac mineralization is inversely correlated with morbidity and long-term survival, we investigated the role of ABCC6 in the calcification response to cardiac injury in mice. By using two models of infarction, nonischemic cryoinjury and the pathologically relevant coronary artery ligation, we confirmed a large propensity to acute cardiac mineralization in Abcc6−/− mice. Fu...

Introduction: Experimental evidence suggests positive effects of physical activity on skeletal mass. Biochemical markers determine the response rate of bone metabolism to physical activity. Therefore, the aim of this study was to investigate the effect of Pilates exercise training on serum osteocalcin and parathormone levels in inactive and overweight women. Methods: 28 healthy overweight wome...

Low vitamin K status is associated with low BMD and increased fracture risk. Additionally, a specific menaquinone, menatetrenone (MK4), may reduce fracture risk. However, whether vitamin K plays a role in the skeletal health of North American women remains unclear. Moreover, various K vitamers (e.g., phylloquinone and MK4) may have differing skeletal effects. The objective of this study was to ...

BACKGROUND A significant proportion of hemodialysis patients have functional, but modifiable, vitamin K deficiency. OBJECTIVE To determine the correlates of poor vitamin K status in hemodialysis patients. DESIGN Cross-sectional study. SETTING Hemodialysis units at Kingston General Hospital and its satellite centres, Ontario, Canada. PATIENTS Patients undergoing outpatient hemodialysis f...