Sevelamer and Secondary Hyperparathyroidism in Chronic Kidney Disease

Summary

The hypothesis underlying this study is that phosphate interferes with PTH-mediated calcium reabsorption in the distal nephron and thereby necessitates supranormal \[PTH\]to maintain normocalcemia in chronic kidney disease. This study will examine the hypothesis with measures of phosphate homeostasis and calcium reabsorption. A double-blind trial of the intestinal phosphate binder sevelamer carbonate will be employed to examine whether reductions in phosphate influx alter distal nephron phosphate concentration and the \[PTH\] required for calcium reabsorption in the expected manner.

Timeline

Start

2010-04

Primary completion

2012-08

Completion

2013-04

Publications

• Natale P, Green SC, Ruospo M, Craig JC, Vecchio M, Elder GJ, Strippoli GF. Phosphate binders for preventing and treating chronic kidney disease-mineral and bone disorder (CKD-MBD). Cochrane Database Syst Rev. 2025 Jun 27;6(6):CD006023. doi: 10.1002/14651858.CD006023.pub4.
• Phelps KR, Mason DL. Parathyroid Hormone, Fibroblast Growth Factor 23, and Parameters of Phosphate Reabsorption. Am J Nephrol. 2018;47(5):343-351. doi: 10.1159/000489270. Epub 2018 May 18.
• Phelps KR, Mason DL, Stote KS. Phosphate homeostasis, parathyroid hormone, and fibroblast growth factor 23 in stages 3 and 4 chronic kidney disease. Clin Nephrol. 2016 May;85(5):251-61. doi: 10.5414/CN108686.
• Phelps KR, Mason DL. Parameters of phosphorus homeostasis at normal and reduced GFR: theoretical considerations. Clin Nephrol. 2015 Mar;83(3):167-76. doi: 10.5414/cn108367.

Drugs

Indications