Vitamin K and vascular calcification in chronic kidney disease: An update of current evidence

Area of Science:

• Nephrology
• Cardiology
• Biochemistry

Background:

• Vascular calcification is common in chronic kidney disease (CKD), increasing cardiovascular risk.
• The exact mechanisms linking CKD, Vitamin K deficiency, and vascular calcification are not fully understood.
• Vitamin K deficiency is prevalent in CKD patients.

Purpose of the Study:

• To review the role of Vitamin K in vascular calcification within the context of CKD.
• To examine the pathophysiology connecting Vitamin K deficiency and vascular calcification.
• To analyze existing literature on Vitamin K supplementation in CKD patients.

Main Methods:

• Literature review of animal models, observational studies, and clinical trials.
• Analysis of functional Vitamin K status in CKD.
• Assessment of Vitamin K's impact on vascular calcification and cardiovascular outcomes.

Main Results:

• Animal and observational studies suggest Vitamin K may benefit vascular health in CKD.
• Recent clinical trials failed to confirm these benefits, even with improved Vitamin K status.
• Discrepancies between study types highlight the complexity of Vitamin K's role.

Conclusions:

• Current clinical evidence does not support Vitamin K supplementation for preventing vascular calcification in CKD.
• Further research is needed to understand the conflicting results and explore potential reasons for Vitamin K's limited efficacy.
• Investigating Vitamin K's role in CKD requires nuanced approaches beyond simple supplementation.