Functional assessment of vitamin D status by a novel metabolic approach: the low vitamin D profile concept
Abstract - Background - Determining serum 25-hydroxyvitamin D [25(OH)D], 24,25-dihydroxyvitamin D [24,25(OH)2D] and the vitamin D metabolite ratio (VMR) allows the identification of individuals with a low vitamin D metabolite profile. Here, we evaluated if such a functional approach provides superio...
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
05 October 2023
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| In: |
Clinical chemistry
Year: 2023, Volume: 69, Issue: 11, Pages: 1307-1316 |
| ISSN: | 1530-8561 |
| DOI: | 10.1093/clinchem/hvad151 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/clinchem/hvad151 Verlag, lizenzpflichtig, Volltext: https://academic.oup.com/clinchem/article/69/11/1307/7292901 
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| Author Notes: | Markus Herrmann, Sieglinde Zelzer, Etienne Cavalier, Marcus Kleber, Camilla Drexler-Helmberg, Peter Schlenke, Pero Curcic, Martin H Keppel, Dietmar Enko, Hubert Scharnagl, Stefan Pilz, and Winfried März |
MARC
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| 245 | 1 | 0 | |a Functional assessment of vitamin D status by a novel metabolic approach |b the low vitamin D profile concept |c Markus Herrmann, Sieglinde Zelzer, Etienne Cavalier, Marcus Kleber, Camilla Drexler-Helmberg, Peter Schlenke, Pero Curcic, Martin H Keppel, Dietmar Enko, Hubert Scharnagl, Stefan Pilz, and Winfried März |
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| 520 | |a Abstract - Background - Determining serum 25-hydroxyvitamin D [25(OH)D], 24,25-dihydroxyvitamin D [24,25(OH)2D] and the vitamin D metabolite ratio (VMR) allows the identification of individuals with a low vitamin D metabolite profile. Here, we evaluated if such a functional approach provides superior diagnostic information to serum 25(OH)D alone. - Methods - 25(OH)D, 24,25(OH)2D, and the VMR were determined in participants of the DESIRE (Desirable Vitamin D Concentrations, n = 2010) and the LURIC (Ludwigshafen Risk and Cardiovascular Health, n = 2456) studies. A low vitamin D metabolite profile (vitamin D insufficiency) was defined by a 24,25(OH)2D concentration <1.2 ng/mL (<3 nmol/L) and a VMR <4%. Parathyroid hormone (PTH) and bone turnover markers were measured in both cohorts, whereas 10-year mortality data was recorded in LURIC only. - Results - The median age in DESIRE and LURIC was 43.3 and 63.8 years, respectively. Median 25(OH)D concentrations were 27.2 ng/mL (68.0 nmol/L) and 15.5 ng/mL (38.8 nmol/L), respectively. Serum 25(OH)D deficiency, defined as <20.2 ng/mL (<50 nmol/L), was present in 483 (24.0%) and 1701 (69.3%) participants of DESIRE and LURIC, respectively. In contrast, only 77 (3.8%) and 521 (21.2%) participants had a low vitamin D metabolite profile. Regardless of the serum 25(OH)D concentration, a low vitamin D metabolite profile was associated with a significantly higher PTH, accelerated bone metabolism, and higher all-cause mortality than an unremarkable vitamin D metabolite profile. - Conclusions - The personalized assessment of vitamin D status using a functional approach better identifies patients with accelerated bone metabolism and increased mortality than the use of a fixed 25(OH)D cutoff of 20 ng/mL (50 nmol/L). | ||
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