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Clin Infect Dis. 2012 Apr;54(7):1013-25. doi: 10.1093/cid/cir968. Epub 2012 Jan 19.

Vitamin D3 decreases parathyroid hormone in HIV-infected youth being treated with tenofovir: a randomized, placebo-controlled trial.

Author information

1
Department of Pediatrics, Children's Research Institute, Medical College of Wisconsin, Children's Hospital of Wisconsin, Milwaukee, WI 53201-1997, USA. phavens@mcw.edu

Abstract

BACKGROUND:

The study goal was to determine the effect of vitamin D (VITD) supplementation on tubular reabsorption of phosphate (TRP), parathyroid hormone (PTH), bone alkaline phosphatase (BAP), and C-telopeptide (CTX) in youth infected with human immunodeficiency virus (HIV) receiving and not receiving combination antiretroviral therapy (cART) containing tenofovir disoproxil fumarate (TDF).

METHODS:

This randomized, double-blind, placebo-controlled multicenter trial enrolled HIV-infected youth 18-25 years based on stable treatment with cART containing TDF (n = 118) or no TDF (noTDF; n = 85), and randomized within those groups to vitamin D3, 50 000 IU (n = 102) or placebo (n = 101), administered at 0, 4, and 8 weeks. Outcomes included change in TRP, PTH, BAP, and CTX from baseline to week 12 by TDF/noTDF; and VITD/placebo.

RESULTS:

At baseline, VITD and placebo groups were similar except those on TDF had lower TRP and higher PTH and CTX. At week 12, 95% in the VITD group had sufficient serum 25-hydroxy vitamin D (25-OHD; ≥20 ng/mL), increased from 48% at baseline, without change in placebo (P < .001). PTH decreased in the TDF group receiving VITD (P = .031) but not in the noTDF group receiving VITD, or either placebo group. The decrease in PTH with VITD in those on TDF occurred with insufficient and sufficient baseline 25-OHD (mean PTH change, -7.9 and -6.2 pg/mL; P = .031 and .053, respectively).

CONCLUSIONS:

In youth on TDF, vitamin D3 supplementation decreased PTH, regardless of baseline 25-OHD concentration.

CLINICAL TRIALS REGISTRATION:

NCT00490412.

PMID:
22267714
PMCID:
PMC3297650
DOI:
10.1093/cid/cir968
[Indexed for MEDLINE]
Free PMC Article

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