Linked Life Data

18199601

Source:http://linkedlifedata.com/resource/pubmed/id/18199601

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2008-4-3
pubmed:abstractText
Patients with renal insufficiency develop secondary hyperparathyroidism. Monotherapy with active vitamin D or calcimimetics ameliorates secondary hyperparathyroidism. We compared kidney damage in subtotally nephrectomized (SNX) rats treated with active vitamin D (calcitriol) or the calcimimetic R-568. Male Sprague-Dawley SNX and sham-operated (sham-op) rats were randomized into the following treatment groups: SNX + R-568, SNX + calcitriol, SNX + vehicle, sham-op + R-568, sham-op + calcitriol, and sham-op + vehicle. Albuminuria and blood pressure were monitored and kidneys were examined using morphometry, immunohistochemistry, quantitative RT-PCR, and in situ hybridization. Parathyroid hormone concentrations were lowered to the same extent by the two interventions, although phosphorus and the calcium-phosphorus product were reduced only by R-568 treatment. SNX rats developed marked albuminuria, which was significantly reduced in ad libitum- and pair-fed animals treated with R-568 and animals treated with calcitriol. Mean glomerular volume (6.05 +/- 1.46 vs. 2.70 +/- 0.91 mm(3)), podocyte volume (831 +/- 127 vs. 397 +/- 67 microm(3)), the degree of foot process fusion (mean width of foot processes = 958 +/- 364 vs. 272 +/- 35 nm), and glomerular basement membrane thickness (244 +/- 6 vs. 267 +/- 23 nm), as well as desmin staining, were significantly higher in vehicle-treated SNX than sham-operated animals. These changes were ameliorated with R-568 and calcitriol. In SNX, as well as sham-operated, animals, expression of the calcium-sensing receptor (protein and mRNA) was upregulated by treatment with the calcimimetic, but not calcitriol. Calcitriol and R-568 were similarly effective in ameliorating kidney damage.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1931-857X
pubmed:author
pubmed:issnType
Print
pubmed:volume
294
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
F748-57
pubmed:dateRevised
2011-4-28
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Calcimimetic R-568 or calcitriol: equally beneficial on progression of renal damage in subtotally nephrectomized rats.
pubmed:affiliation
Institute of Pathology, Univ. of Heidelberg, Im Neuenheimer Feld 220/221, D-69120 Heidelberg, Germany. g.piecha@gmx.de
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't