Disturbances in Bone Largely Predict Aortic Calcification in an Alternative Rat Model Developed to Study Both Vascular and Bone Pathology in Chronic Kidney Disease

Oxford University Press (OUP) - Tập 30 Số 12 - Trang 2313-2324 - 2015
Ellen Neven1, Rida Bashir-Dar1, Geert Dams1, Geert J. Behets1, Anja Verhulst1, Monique Elseviers2, Patrick C. D’Haese1
1Laboratory of Pathophysiology, Department of Biomedical Sciences, University of Antwerp, Belgium
2Department of Nursing Sciences, Faculty of Medicine and Public Health, University of Antwerp, Belgium.

Tóm tắt

ABSTRACT   Because current rat models used to study chronic kidney disease (CKD)-related vascular calcification show consistent but excessive vascular calcification and chaotic, immeasurable, bone mineralization due to excessive bone turnover, they are not suited to study the bone-vascular axis in one and the same animal. Because vascular calcification and bone mineralization are closely related to each other, an animal model in which both pathologies can be studied concomitantly is highly needed. CKD-related vascular calcification in rats was induced by a 0.25% adenine/low vitamin K diet. To follow vascular calcification and bone pathology over time, rats were killed at weeks 4, 8, 10, 11, and 12. Both static and dynamic bone parameters were measured. Vascular calcification was quantified by histomorphometry and measurement of the arterial calcium content. Stable, severe CKD was induced along with hyperphosphatemia, hypocalcemia as well as increased serum PTH and FGF23. Calcification in the aorta and peripheral arteries was present from week 8 of CKD onward. Four and 8 weeks after CKD, static and dynamic bone parameters were measurable in all animals, thereby presenting typical features of hyperparathyroid bone disease. Multiple regression analysis showed that the eroded perimeter and mineral apposition rate in the bone were strong predictors for aortic calcification. This rat model presents a stable CKD, moderate vascular calcification, and quantifiable bone pathology after 8 weeks of CKD and is the first model that lends itself to study these main complications simultaneously in CKD in mechanistic and intervention studies. © 2015 American Society for Bone and Mineral Research.

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Oxford University Press (OUP)

Tập 30 Số 12

2313-2324

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