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BMC Nephrol. 2018 Aug 22;19(1):212. doi: 10.1186/s12882-018-1000-8.

Paricalcitol supplementation during the first year after kidney transplantation does not affect calcification propensity score.

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Department of Transplantation Medicine, Oslo University Hospital Rikshospitalet, P.O. Box 4950, Nydalen, 0424, Oslo, Norway.
Department of Transplantation Medicine, Oslo University Hospital Rikshospitalet, P.O. Box 4950, Nydalen, 0424, Oslo, Norway.
Calciscon AG, Bern, Switzerland.
Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.
Smerud Medical Research International AS, Oslo, Norway.
The Norwegian Renal Registry, Oslo University Hospital Rikshospitalet, Oslo, Norway.
Department of Pharmaceutical Biosciences, School of Pharmacy, University of Oslo, Oslo, Norway.



Cardiovascular complications are common in kidney transplant patients and calcification propensity of blood, measured as T50, is associated with cardiovascular outcomes. Paricalcitol supplementation affects calcium/phosphate homeostasis and may affect calcification propensity. To assess this hypothesis we measured T50 in kidney transplant recipients participating in a randomized study comparing paricalcitol versus no treatment during the first year after kidney transplantation.


Stored serum samples from 76 kidney transplant recipients (paricalcitol n = 37, no treatment n = 39) were analyzed. Analyses were performed at inclusion (8 weeks after transplantation) and repeated one year after transplantation.


There were no statistically significant differences in T50 between the paricalcitol and placebo groups, neither at baseline (p = 0.56) nor at 1 year (p = 0.61). Also, there were no significant changes in T50 over time in either group or when pooling all data (p <  0.20). In multivariate regression analysis, out of 16 potentially relevant covariates, comprising clinical and biochemical parameters, only plasma PTH and T50 at baseline were significantly correlated to T50 after one year. (p <  0.03 and p < 0.01, respectively).


Calcium propensity measured as T50 score remained unchanged with paricalcitol treatment in kidney transplant recipients, and was not changed over time during the study period of one year.

TRIAL REGISTRATION:, NCT01694160 , registered 23 September 2012.


Calcification propensity score; Paricalcitol; Randomized controlled trial; Renal transplantation

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