{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T15:44:38Z","timestamp":1792424678709,"version":"4.5.0"},"reference-count":44,"publisher":"American Physiological Society","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American Journal of Physiology-Renal Physiology"],"published-print":{"date-parts":[[2010,6]]},"abstract":"<jats:p>Calcimimetics activate the calcium-sensing receptor (CaR) and reduce parathyroid hormone (PTH) by increasing the sensitivity of the parathyroid CaR to ambient calcium. The calcimimetic, cinacalcet, is effective in treating secondary hyperparathyroidism in dialysis patients [chronic kidney disease (CKD 5)], but little is known about its effects on stage 3\u20134 CKD patients. We compared cinacalcet and paricalcitol in uremic rats with creatinine clearances \u201cequivalent\u201d to patients with CKD 3\u20134. Uremia was induced in anesthetized rats using the 5\/6th nephrectomy model. Groups were 1) uremic control, 2) uremic + cinacalcet (U+Cin; 15 mg\u00b7kg<jats:sup>\u22121<\/jats:sup>\u00b7day<jats:sup>\u22121<\/jats:sup>po for 6 wk), 3) uremic + paricalcitol (U+Par; 0.16 \u03bcg\/kg, 3 \u00d7 wk, ip for 6 wk), and 4) normal. Unlike U+Par animals, cinacalcet promoted hypocalcemia and marked hyperphosphatemia. The Ca \u00d7 P in U+Cin rats was twice that of U+Par rats. Both compounds suppressed PTH. Serum 1,25-(OH)<jats:sub>2<\/jats:sub>D<jats:sub>3<\/jats:sub>was decreased in both U+Par and U+Cin rats. Serum FGF-23 was increased in U+Par but not in U+Cin, where it tended to decrease. Analysis of tibiae showed that U+Cin, but not U+Par, rats had reduced bone volume. U+Cin rats had similar bone formation and reduced osteoid surface, but higher bone resorption. Hypocalcemia, hyperphosphatemia, low 1,25-(OH)<jats:sub>2<\/jats:sub>D<jats:sub>3<\/jats:sub>, and cinacalcet itself may play a role in the detrimental effects on bone seen in U+Cin rats. This requires further investigation. In conclusion, due to its effects on bone and to the hypocalcemia and severe hyperphosphatemia it induces, we believe that cinacalcet should not be used in patients with CKD without further detailed studies.<\/jats:p>","DOI":"10.1152\/ajprenal.00552.2009","type":"journal-article","created":{"date-parts":[[2010,3,3]],"date-time":"2010-03-03T20:51:05Z","timestamp":1267649465000},"page":"F1315-F1322","source":"Crossref","is-referenced-by-count":68,"title":["Effect of paricalcitol and cinacalcet on serum phosphate, FGF-23, and bone in rats with chronic kidney disease"],"prefix":"10.1152","volume":"298","author":[{"given":"Jane L.","family":"Finch","sequence":"first","affiliation":[{"name":"Renal Division, Washington University Medical School, St. Louis, Missouri; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masanori","family":"Tokumoto","sequence":"additional","affiliation":[{"name":"Renal Division, Washington University Medical School, St. Louis, Missouri; 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