Abstract:
BACKGROUND/AIMS:Vitamin D insufficiency drives secondary hyperparathyroidism (SHPT) and is associated with increased cardiovascular mortality in patients with chronic kidney disease (CKD). SHPT is poorly addressed by current vitamin D repletion options. The present study evaluated a novel investigational vitamin D repletion therapy: a modified-release (MR) formulation of calcifediol designed to raise serum 25-hydroxyvitamin D in a gradual manner to minimize the induction of CYP24 and, thereby, improve the SHPT control. METHODS:This randomized, double-blind, placebo-controlled trial evaluated MR calcifediol in CKD subjects (n = 78) with plasma intact parathyroid hormone (iPTH) >70 pg/ml and serum total 25-hydroxyvitamin D <30 ng/ml. Subjects received daily treatment for six weeks with oral MR calcifediol (30, 60 or 90 µg) or a placebo. RESULTS:More than 90% of subjects treated with MR calcifediol achieved serum 25-hydroxyvitamin D levels ≥30 ng/ml versus 3% of subjects treated with placebo (p < 0.0001). Mean plasma iPTH decreased from baseline (140.3 pg/ml) by 20.9 ± 6.2% (SE), 32.8 ± 5.7 and 39.3 ± 4.3% in the 30, 60 and 90 µg dose groups, respectively, and increased 17.2 ± 7.8% in the pooled placebo group (p < 0.005). No clinically significant safety concerns arose during MR calcifediol treatment. CONCLUSION:Oral MR calcifediol appears safe and highly effective in treating SHPT associated with vitamin D insufficiency in CKD.
journal_name
Am J Nephroljournal_title
American journal of nephrologyauthors
Sprague SM,Silva AL,Al-Saghir F,Damle R,Tabash SP,Petkovich M,Messner EJ,White JA,Melnick JZ,Bishop CWdoi
10.1159/000369939subject
Has Abstractpub_date
2014-01-01 00:00:00pages
535-45issue
6eissn
0250-8095issn
1421-9670pii
000369939journal_volume
40pub_type
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