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The results of the study indicate that paricalcitol is effective in treating hyperparathyroidism in patients on PD, and suggest an effect upon proteinuria and PM permeability (not previously reported), with diminished peritoneal protein loss and increased ultrafiltration. The antiinflammatory, antifibrotic and RAAS-modulating actions described for paricalcitol may be responsible for these findings, and could be important for preserving the peritoneum as a dialyzing membrane.

In hemodialysis patients with secondary hyperparathyroidism controlled by cinacalcet, a transient (1-6 hours) reduction in PTH and P and an increase in calcitonin are observed after each daily dose, with return to baseline at 24 hours. After calcimimetics discontinuation, PTH was significantly increased at 48 hours. The assay used to measure PTH does not influence relative changes induced by cinacalcet.

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