Higher 25(OH)D2 is associated with lower 25(OH)D3 and 1,25(OH)2D3

Christine M. Swanson, Carrie Nielson, Smriti Shrestha, Christine Lee, Elizabeth Barrett-Connor, Ivo Jans, Jane A. Cauley, Steven Boonen, Roger Bouillon, Dirk Vanderschueren, Eric Orwoll

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Context: Despite common use of supplemental vitamin D2 in clinical practice, the associations of serum vitaminD2 concentrations with other vitaminDmetabolites and total vitaminDare unclear. Objective: The aim of the study was to measure vitamin D2 and D3 levels and examine their associations with each other and with total vitamin D. Design: We performed a cross-sectional analysis of 679 randomly selected participants from the Osteoporotic Fractures in Men Study. 25-Hydroxyvitamin D2 [25(OH)D2], 25(OH)D3, 1,25-dihydroxyvitamin D2 [1,25(OH)2D2], and 1,25(OH)2D3 were measured using liquid chromatographytandem mass spectrometry and were summed to obtain total 25(OH)D and 1,25(OH)2D. Associations between all metabolites (D2, D3, and total levels) were examined using Wilcoxon rank-sum tests and Spearman correlations. Results: 25(OH)D2 and 1,25(OH)2D2 were detectable in 189 (27.8%) and 178 (26.2%) of the men, respectively. Higher 25(OH)D2 levels did not correlate with higher total 25(OH)D (r=0.10; P=.17), although median total 25(OH)D was slightly higher in those with detectable vs undetectable 25(OH)D2 (25.8 vs 24.3 ng/mL; P = .001). 25(OH)D2 was not positively associated with total 1,25(OH)2D levels (r-=0.11; P = .13), and median 1,25(OH)2D level was not higher in those with detectable vs undetectable 25(OH)D2. Higher 25(OH)D2 was associated with lower 25(OH)D3 (r - =0.35; P = .001) and 1,25(OH)2D3 (r-=0.32; P = .001), with median levels of both D3 metabolites 18-35% higher when D2 metabolites were undetectable. Conclusions: In a cohort of older men, 25(OH)D2 is associated with lower levels of 25(OH)D3 and 1,25(OH) 2D3, suggesting that vitamin D2 may decrease the availability of D3 and may not increase calcitriol levels.

Original languageEnglish (US)
Pages (from-to)2736-2744
Number of pages9
JournalJournal of Clinical Endocrinology and Metabolism
Volume99
Issue number8
DOIs
StatePublished - 2014

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Ergocalciferols
Metabolites
Nonparametric Statistics
25-Hydroxyvitamin D 2
Osteoporotic Fractures
Calcitriol
Cholecalciferol
Vitamin D
Mass spectrometry
Mass Spectrometry
Cross-Sectional Studies
Availability
Liquids
Serum
1,25-dihydroxyergocalciferol

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Biochemistry
  • Endocrinology
  • Biochemistry, medical
  • Endocrinology, Diabetes and Metabolism

Cite this

Higher 25(OH)D2 is associated with lower 25(OH)D3 and 1,25(OH)2D3. / Swanson, Christine M.; Nielson, Carrie; Shrestha, Smriti; Lee, Christine; Barrett-Connor, Elizabeth; Jans, Ivo; Cauley, Jane A.; Boonen, Steven; Bouillon, Roger; Vanderschueren, Dirk; Orwoll, Eric.

In: Journal of Clinical Endocrinology and Metabolism, Vol. 99, No. 8, 2014, p. 2736-2744.

Research output: Contribution to journalArticle

Swanson, CM, Nielson, C, Shrestha, S, Lee, C, Barrett-Connor, E, Jans, I, Cauley, JA, Boonen, S, Bouillon, R, Vanderschueren, D & Orwoll, E 2014, 'Higher 25(OH)D2 is associated with lower 25(OH)D3 and 1,25(OH)2D3', Journal of Clinical Endocrinology and Metabolism, vol. 99, no. 8, pp. 2736-2744. https://doi.org/10.1210/jc.2014-1069
Swanson, Christine M. ; Nielson, Carrie ; Shrestha, Smriti ; Lee, Christine ; Barrett-Connor, Elizabeth ; Jans, Ivo ; Cauley, Jane A. ; Boonen, Steven ; Bouillon, Roger ; Vanderschueren, Dirk ; Orwoll, Eric. / Higher 25(OH)D2 is associated with lower 25(OH)D3 and 1,25(OH)2D3. In: Journal of Clinical Endocrinology and Metabolism. 2014 ; Vol. 99, No. 8. pp. 2736-2744.
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T1 - Higher 25(OH)D2 is associated with lower 25(OH)D3 and 1,25(OH)2D3

AU - Swanson, Christine M.

AU - Nielson, Carrie

AU - Shrestha, Smriti

AU - Lee, Christine

AU - Barrett-Connor, Elizabeth

AU - Jans, Ivo

AU - Cauley, Jane A.

AU - Boonen, Steven

AU - Bouillon, Roger

AU - Vanderschueren, Dirk

AU - Orwoll, Eric

PY - 2014

Y1 - 2014

N2 - Context: Despite common use of supplemental vitamin D2 in clinical practice, the associations of serum vitaminD2 concentrations with other vitaminDmetabolites and total vitaminDare unclear. Objective: The aim of the study was to measure vitamin D2 and D3 levels and examine their associations with each other and with total vitamin D. Design: We performed a cross-sectional analysis of 679 randomly selected participants from the Osteoporotic Fractures in Men Study. 25-Hydroxyvitamin D2 [25(OH)D2], 25(OH)D3, 1,25-dihydroxyvitamin D2 [1,25(OH)2D2], and 1,25(OH)2D3 were measured using liquid chromatographytandem mass spectrometry and were summed to obtain total 25(OH)D and 1,25(OH)2D. Associations between all metabolites (D2, D3, and total levels) were examined using Wilcoxon rank-sum tests and Spearman correlations. Results: 25(OH)D2 and 1,25(OH)2D2 were detectable in 189 (27.8%) and 178 (26.2%) of the men, respectively. Higher 25(OH)D2 levels did not correlate with higher total 25(OH)D (r=0.10; P=.17), although median total 25(OH)D was slightly higher in those with detectable vs undetectable 25(OH)D2 (25.8 vs 24.3 ng/mL; P = .001). 25(OH)D2 was not positively associated with total 1,25(OH)2D levels (r-=0.11; P = .13), and median 1,25(OH)2D level was not higher in those with detectable vs undetectable 25(OH)D2. Higher 25(OH)D2 was associated with lower 25(OH)D3 (r - =0.35; P = .001) and 1,25(OH)2D3 (r-=0.32; P = .001), with median levels of both D3 metabolites 18-35% higher when D2 metabolites were undetectable. Conclusions: In a cohort of older men, 25(OH)D2 is associated with lower levels of 25(OH)D3 and 1,25(OH) 2D3, suggesting that vitamin D2 may decrease the availability of D3 and may not increase calcitriol levels.

AB - Context: Despite common use of supplemental vitamin D2 in clinical practice, the associations of serum vitaminD2 concentrations with other vitaminDmetabolites and total vitaminDare unclear. Objective: The aim of the study was to measure vitamin D2 and D3 levels and examine their associations with each other and with total vitamin D. Design: We performed a cross-sectional analysis of 679 randomly selected participants from the Osteoporotic Fractures in Men Study. 25-Hydroxyvitamin D2 [25(OH)D2], 25(OH)D3, 1,25-dihydroxyvitamin D2 [1,25(OH)2D2], and 1,25(OH)2D3 were measured using liquid chromatographytandem mass spectrometry and were summed to obtain total 25(OH)D and 1,25(OH)2D. Associations between all metabolites (D2, D3, and total levels) were examined using Wilcoxon rank-sum tests and Spearman correlations. Results: 25(OH)D2 and 1,25(OH)2D2 were detectable in 189 (27.8%) and 178 (26.2%) of the men, respectively. Higher 25(OH)D2 levels did not correlate with higher total 25(OH)D (r=0.10; P=.17), although median total 25(OH)D was slightly higher in those with detectable vs undetectable 25(OH)D2 (25.8 vs 24.3 ng/mL; P = .001). 25(OH)D2 was not positively associated with total 1,25(OH)2D levels (r-=0.11; P = .13), and median 1,25(OH)2D level was not higher in those with detectable vs undetectable 25(OH)D2. Higher 25(OH)D2 was associated with lower 25(OH)D3 (r - =0.35; P = .001) and 1,25(OH)2D3 (r-=0.32; P = .001), with median levels of both D3 metabolites 18-35% higher when D2 metabolites were undetectable. Conclusions: In a cohort of older men, 25(OH)D2 is associated with lower levels of 25(OH)D3 and 1,25(OH) 2D3, suggesting that vitamin D2 may decrease the availability of D3 and may not increase calcitriol levels.

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