{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T12:59:49Z","timestamp":1780491589477,"version":"3.54.1"},"reference-count":49,"publisher":"American Veterinary Medical Association (AVMA)","issue":"10","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["javma"],"published-print":{"date-parts":[[2012,11,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n<jats:p><jats:bold>Objective<\/jats:bold>\u2014To determine whether cats in the nonazotemic stages of chronic kidney disease have increased plasma parathyroid hormone (PTH) concentrations as a compensatory physiologic mechanism to maintain plasma phosphate concentration within the reference interval.<\/jats:p>\n<jats:p><jats:bold>Design<\/jats:bold>\u2014Prospective longitudinal study.<\/jats:p>\n<jats:p><jats:bold>Animals<\/jats:bold>\u2014118 client-owned geriatric cats with various degrees of renal function.<\/jats:p>\n<jats:p><jats:bold>Procedures<\/jats:bold>\u2014For each cat, a blood sample was obtained for plasma biochemical analysis and determination of plasma PTH concentration, and a urine sample was obtained for determination of urine specific gravity at study entry (baseline) and after 12 months. For a subset of 30 cats, plasma calcitriol concentration was determined at baseline. Cats were categorized into 1 of 3 groups on the basis of kidney function at the end of 12 months. At baseline and after 12 months, plasma concentrations of variables associated with calcium homeostasis were compared between the 3 groups and also within groups over time. Multivariable linear regression was used to identify variables associated with plasma PTH concentration.<\/jats:p>\n<jats:p><jats:bold>Results<\/jats:bold>\u2014Plasma PTH concentration was significantly increased in cats that developed azotemia, compared with PTH concentration in cats that remained nonazotemic, and PTH concentration increased before changes in plasma calcium and phosphate concentrations were detected. A moderate positive association between plasma calcitriol and PTH concentrations was identified. Plasma PTH concentration was associated with age and plasma urea, creatinine, and total calcium concentrations in the final multivariable model.<\/jats:p>\n<jats:p><jats:bold>Conclusions and Clinical Relevance<\/jats:bold>\u2014Results suggested that renal secondary hyperparathyroidism can develop prior to azotemia in cats, even in the absence of hyperphosphatemia and hypocalcemia.<\/jats:p>","DOI":"10.2460\/javma.241.10.1326","type":"journal-article","created":{"date-parts":[[2012,10,31]],"date-time":"2012-10-31T14:43:32Z","timestamp":1351694612000},"page":"1326-1335","source":"Crossref","is-referenced-by-count":41,"title":["Parathyroid hormone concentration in geriatric cats with various degrees of renal function"],"prefix":"10.2460","volume":"241","author":[{"given":"Natalie C.","family":"Finch","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Harriet M.","family":"Syme","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jonathan","family":"Elliott","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1272","reference":[{"key":"ref1","series-title":"J Small Anim Pract","first-page":"108","article-title":"Feline chronic renal failure: calcium homeostasis in 80 cases diagnosed between 1992 and 1995","volume":"39","author":"Barber","year":"1998"},{"key":"ref2","series-title":"Endocrinology","first-page":"1043","article-title":"Regulation of parathyroid hormone secretion: proportional control by calcium, lack of effect of phosphate","volume":"83","author":"Sherwood","year":"1968"},{"key":"ref3","series-title":"Nephron","first-page":"77","article-title":"Role of phosphate in the genesis of secondary hyperparathyroidism of renal failure","volume":"18","author":"Massry","year":"1977"},{"key":"ref4","series-title":"J Am Soc 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Both are essential to prevent or suppress toxic hyperparathyroidism","volume":"26","author":"Nagode","year":"1996"},{"key":"ref48","series-title":"Eur J Clin Invest","first-page":"915","article-title":"The role of calcimimetics in the treatment of hyperparathyroidism","volume":"37","author":"W\u00fcthrich","year":"2007"},{"key":"ref49","series-title":"Clin J Am Soc Nephrol","first-page":"286","article-title":"Early control of PTH and FGF23 in normophosphatemic CKD patients: a new target in CKD-MBD therapy?","volume":"5","author":"Oliveira","year":"2010"}],"container-title":["Journal of the American Veterinary Medical Association"],"original-title":[],"link":[{"URL":"https:\/\/avmajournals.avma.org\/view\/journals\/javma\/241\/10\/javma.241.10.1326.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/avmajournals.avma.org\/downloadpdf\/journals\/javma\/241\/10\/javma.241.10.1326.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/avmajournals.avma.org\/downloadpdf\/journals\/javma\/241\/10\/javma.241.10.1326.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,3,7]],"date-time":"2025-03-07T13:45:42Z","timestamp":1741355142000},"score":1,"resource":{"primary":{"URL":"https:\/\/avmajournals.avma.org\/view\/journals\/javma\/241\/10\/javma.241.10.1326.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,11,15]]},"references-count":49,"journal-issue":{"issue":"10"},"URL":"https:\/\/doi.org\/10.2460\/javma.241.10.1326","relation":{},"ISSN":["0003-1488"],"issn-type":[{"value":"0003-1488","type":"print"}],"subject":[],"published":{"date-parts":[[2012,11,15]]}}}