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An evaluation of automated methods for measurement of serum 25-hydroxyvitamin D.
Wagner D, Hanwell HE, Vieth R. Wagner D, et al. Clin Biochem. 2009 Oct;42(15):1549-56. doi: 10.1016/j.clinbiochem.2009.07.013. Epub 2009 Jul 21. Clin Biochem. 2009. PMID: 19631201
OBJECTIVES: To compare two new automated assays with the well-established reference method, DiaSorin radioimmunoassay (RIA), for quantitation of serum total 25-hydroxyvitamin D [25(OH)D]. ...The DiaSorin LIAISON 25 OH Vitamin D TOTAL assay is an accurate and …
OBJECTIVES: To compare two new automated assays with the well-established reference method, DiaSorin radioimmunoassay (RIA), for quantitatio …
The bioavailability of vitamin D from fortified cheeses and supplements is equivalent in adults.
Wagner D, Sidhom G, Whiting SJ, Rousseau D, Vieth R. Wagner D, et al. J Nutr. 2008 Jul;138(7):1365-71. doi: 10.1093/jn/138.7.1365. J Nutr. 2008. PMID: 18567762 Clinical Trial.
There is a need to increase the options for vitamin D fortification. We have developed a method to fortify hard cheese with vitamin D. ...The treatments contained 28,000 IU cholecalciferol (vitamin D3), equivalent to 4000 IU (100 microg/d). The primary outcom …
There is a need to increase the options for vitamin D fortification. We have developed a method to fortify hard cheese with vitamin …
Low wintertime vitamin D levels in a sample of healthy young adults of diverse ancestry living in the Toronto area: associations with vitamin D intake and skin pigmentation.
Gozdzik A, Barta JL, Wu H, Wagner D, Cole DE, Vieth R, Whiting S, Parra EJ. Gozdzik A, et al. Among authors: wagner d. BMC Public Health. 2008 Sep 26;8:336. doi: 10.1186/1471-2458-8-336. BMC Public Health. 2008. PMID: 18817578 Free PMC article.
BACKGROUND: Vitamin D plays a critical role in bone metabolism and many cellular and immunological processes. Recent research indicates that concentrations of serum 25-hydroxyvitamin D [25(OH)D], the main indicator of vitamin D status, should be in exc …
BACKGROUND: Vitamin D plays a critical role in bone metabolism and many cellular and immunological processes. Recent research indicat …
The development and evaluation of a food frequency questionnaire used in assessing vitamin D intake in a sample of healthy young Canadian adults of diverse ancestry.
Wu H, Gozdzik A, Barta JL, Wagner D, Cole DE, Vieth R, Parra EJ, Whiting SJ. Wu H, et al. Among authors: wagner d. Nutr Res. 2009 Apr;29(4):255-61. doi: 10.1016/j.nutres.2009.03.006. Nutr Res. 2009. PMID: 19410977

Serum 25-hydroxyvitamin D (25(OH)D), the major biomarker of vitamin D nutritional status, and skin melanin were determined. The FFQ results were highly correlated with 7-day diary results and with serum 25(OH)D concentrations (r = 0.529, P < .001; r

Serum 25-hydroxyvitamin D (25(OH)D), the major biomarker of vitamin D nutritional status, and skin melanin were determi …
The ratio of serum 24,25-dihydroxyvitamin D(3) to 25-hydroxyvitamin D(3) is predictive of 25-hydroxyvitamin D(3) response to vitamin D(3) supplementation.
Wagner D, Hanwell HE, Schnabl K, Yazdanpanah M, Kimball S, Fu L, Sidhom G, Rousseau D, Cole DE, Vieth R. Wagner D, et al. J Steroid Biochem Mol Biol. 2011 Sep;126(3-5):72-7. doi: 10.1016/j.jsbmb.2011.05.003. Epub 2011 May 13. J Steroid Biochem Mol Biol. 2011. PMID: 21605672 Clinical Trial.
24,25-Dihydroxyvitamin D (24,25VD) is a major catabolite of 25-hydroxyvitamin D (25VD) metabolism, and may be physiologically active. Our objectives were to: (1) characterize the response of serum 24,25VD(3) to vitamin D(3) (VD(3)) supplementation; (2) test t …
24,25-Dihydroxyvitamin D (24,25VD) is a major catabolite of 25-hydroxyvitamin D (25VD) metabolism, and may be physiologically …
Determination of 1,25-dihydroxyvitamin D concentrations in human colon tissues and matched serum samples.
Wagner D, Dias AG, Schnabl K, Van der Kwast T, Vieth R. Wagner D, et al. Anticancer Res. 2012 Jan;32(1):259-63. Anticancer Res. 2012. PMID: 22213314
Colon 1,25(OH)(2)D was measured by lipid extraction followed by enzyme immunoassay (EIA). Serum 1,25(OH)(2)D and 25-hydroxyvitamin D (25(OH)D) were measured by EIA. ...The corresponding intercept at zero serum 1,25(OH)(2)D was 21.5 pmol/kg (95% …
Colon 1,25(OH)(2)D was measured by lipid extraction followed by enzyme immunoassay (EIA). Serum 1,25(OH)(2)D and 25-hydroxyvit …
Randomized clinical trial of vitamin D3 doses on prostatic vitamin D metabolite levels and ki67 labeling in prostate cancer patients.
Wagner D, Trudel D, Van der Kwast T, Nonn L, Giangreco AA, Li D, Dias A, Cardoza M, Laszlo S, Hersey K, Klotz L, Finelli A, Fleshner N, Vieth R. Wagner D, et al. J Clin Endocrinol Metab. 2013 Apr;98(4):1498-507. doi: 10.1210/jc.2012-4019. Epub 2013 Mar 5. J Clin Endocrinol Metab. 2013. PMID: 23463655 Clinical Trial.
INTERVENTION: Vitamin D3 (400, 10 000, or 40 000 IU/d) was orally administered before radical prostatectomy. MAIN OUTCOME MEASURES: We evaluated vitamin D metabolite levels and Ki67 labeling in surgical prostate tissue. ...Prostate vitamin D metabolites corre …
INTERVENTION: Vitamin D3 (400, 10 000, or 40 000 IU/d) was orally administered before radical prostatectomy. MAIN OUTCOME MEASURES: W …
Individual participant data (IPD)-level meta-analysis of randomised controlled trials with vitamin D-fortified foods to estimate Dietary Reference Values for vitamin D.
Cashman KD, Kiely ME, Andersen R, Grønborg IM, Madsen KH, Nissen J, Tetens I, Tripkovic L, Lanham-New SA, Toxqui L, Vaquero MP, Trautvetter U, Jahreis G, Mistry VV, Specker BL, Hower J, Knoll A, Wagner D, Vieth R, Öhlund I, Karlsland Åkeson P, Brett NR, Weiler HA, Ritz C. Cashman KD, et al. Among authors: wagner d. Eur J Nutr. 2020 Jun 15. doi: 10.1007/s00394-020-02298-x. Online ahead of print. Eur J Nutr. 2020. PMID: 32556447
Using data from randomized controlled trials (RCTs) with vitamin D(3)-fortified foods, we undertook an IPD analysis of the response of winter serum 25-hydroxyvitamin (25(OH)D) to total vitamin D intake among children and adults and derived DRV for vitamin …
Using data from randomized controlled trials (RCTs) with vitamin D(3)-fortified foods, we undertook an IPD analysis of the response o …
Differential expression and regulation of vitamin D hydroxylases and inflammatory genes in prostate stroma and epithelium by 1,25-dihydroxyvitamin D in men with prostate cancer and an in vitro model.
Giangreco AA, Dambal S, Wagner D, Van der Kwast T, Vieth R, Prins GS, Nonn L. Giangreco AA, et al. Among authors: wagner d. J Steroid Biochem Mol Biol. 2015 Apr;148:156-65. doi: 10.1016/j.jsbmb.2014.10.004. Epub 2014 Oct 8. J Steroid Biochem Mol Biol. 2015. PMID: 25305352 Free PMC article. Clinical Trial.
Previous work on vitamin D in the prostate has focused on the prostatic epithelium, from which prostate cancer arises. Prostatic epithelial cells are surrounded by stroma, which has well-established regulatory control over epithelial proliferation, differentiation, and the …
Previous work on vitamin D in the prostate has focused on the prostatic epithelium, from which prostate cancer arises. Prostatic epit …
microRNAs and DICER1 are regulated by 1,25-dihydroxyvitamin D in prostate stroma.
Dambal S, Giangreco AA, Acosta AM, Fairchild A, Richards Z, Deaton R, Wagner D, Vieth R, Gann PH, Kajdacsy-Balla A, Van der Kwast T, Nonn L. Dambal S, et al. Among authors: wagner d. J Steroid Biochem Mol Biol. 2017 Mar;167:192-202. doi: 10.1016/j.jsbmb.2017.01.004. Epub 2017 Jan 12. J Steroid Biochem Mol Biol. 2017. PMID: 28089917 Free PMC article. Clinical Trial.
Vitamin D deficiency increases the risk of lethal prostate adenocarcinomas (PCa) and the majority of older men are deficient. ...Herein, we describe regulation of microRNAs (miRs) by the active hormone dihydroxyvitamin D (1,25(OH)(2)D) in human prostate strom …
Vitamin D deficiency increases the risk of lethal prostate adenocarcinomas (PCa) and the majority of older men are deficient. ...Here …
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