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2018 ; 19
(1
): 113
Nephropedia Template TP
gab.com Text
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English Wikipedia
Longitudinal changes in bone and mineral metabolism after cessation of cinacalcet
in dialysis patients with secondary hyperparathyroidism
#MMPMID29764395
Ruderman I
; Smith ER
; Toussaint ND
; Hewitson TD
; Holt SG
BMC Nephrol
2018[May]; 19
(1
): 113
PMID29764395
show ga
BACKGROUND: The calcimimetic agent cinacalcet is effective for the management of
secondary hyperparathyroidism (SHPT) in dialysis patients. Changes to
reimbursement of cinacalcet in Australia provided an opportunity to assess
effects of medication cessation on biochemical and clinical outcomes in dialysis
patients, including changes to novel biomarkers such as calciprotein particles
(CPP). CPP are nanoparticles of mineral and protein in the circulation associated
with increased vascular calcification in patients with chronic kidney disease.
METHODS: Dialysis patients from a single center who ceased cinacalcet between
August 2015 and March 2016 were included in a prospective observational study.
Bloods were taken at the time of cessation of cinacalcet and at 1, 6 and
12 months. Clinical and biochemical outcomes were compared with an age- and
gender-matched cohort of cinacalcet-naïve dialysis patients. RESULTS: Sixty-two
patients participated in the study. Mean age was 69.6?±?13.2 years. Biochemical
changes over 12 months following cessation of cinacalcet included an increase in
serum parathyroid hormone (PTH) (42.2 [IQR 27.8-94.6] pmol/L to 114.8
[83.9-159.1] pmol/L [p?0.001]), serum calcium (2.31?±?0.21 mmol/L to
2.46?±?0.14 mmol/L [p?0.001]) and primary CPP (CPP-I) (p?=?0.002). Changes in
CPP were associated with an increase in PTH (p?=?0.007), calcium (p?=?0.002) and
ferritin (p?=?0.02) but a reduction in serum albumin (p?=?0.001). Over the
12-month period, there were two fractures, five cardiovascular events, one
episode of calciphylaxis, and one parathyroidectomy, with a mortality rate of 19%
(n?=?13). CONCLUSION: Uniquely we report the effects of cinacalcet withdrawal in
a real world setting with demonstrated increases in PTH, serum calcium and CPP
subsets, novel CKD-MBD related factors, over a 12-month period.