• Pieter Evenepoel, Sander Dejongh, Kristin Verbeke, and Bjorn Meijers.
• Laboratory of Nephrology, Department of Immunology and Microbiology, KU Leuven-University of Leuven, B-3000 Leuven, Belgium.
• Toxins (Basel). 2020 Apr 29; 12 (5).

AbstractPatients with chronic kidney disease (CKD) are at increased risk of bone mineral density loss and vascular calcification. Bone demineralization and vascular mineralization often concur in CKD, similar to what observed in the general population. This contradictory association is commonly referred to as the 'calcification paradox' or the bone-vascular axis. Mounting evidence indicates that CKD-associated gut dysbiosis may be involved in the pathogenesis of the bone-vascular axis. A disrupted intestinal barrier function, a metabolic shift from a predominant saccharolytic to a proteolytic fermentation pattern, and a decreased generation of vitamin K may, alone or in concert, drive a vascular and skeletal pathobiology in CKD patients. A better understanding of the role of gut dysbiosis in the bone-vascular axis may open avenues for novel therapeutics, including nutriceuticals.

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