Search Results - "Horst, Ronald L"

Long-term variation in serum 25-hydroxyvitamin D concentration among participants in the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial by Hofmann, Jonathan N, Yu, Kai, Horst, Ronald L, Hayes, Richard B, Purdue, Mark P

“…Molecular epidemiologic studies of vitamin D and risk of cancer and other health outcomes usually involve a single measurement of the biomarker…”
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Vitamin D and Sterol Composition of 10 Types of Mushrooms from Retail Suppliers in the United States by Phillips, Katherine M, Ruggio, David M, Horst, Ronald L, Minor, Bart, Simon, Ryan R, Feeney, Mary Jo, Byrdwell, William C, Haytowitz, David B

“…Vitamin D2 (ergocalciferol) and sterols were analyzed in mushrooms sampled nationwide in the United States to update the USDA Nutrient Database for Standard…”
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Polymorphic Human Sulfotransferase 2A1 Mediates the Formation of 25-Hydroxyvitamin D3-3-O-Sulfate, a Major Circulating Vitamin D Metabolite in Humans by Wong, Timothy, Wang, Zhican, Chapron, Brian D, Suzuki, Mizuki, Claw, Katrina G, Gao, Chunying, Foti, Robert S, Prasad, Bhagwat, Chapron, Alenka, Calamia, Justina, Chaudhry, Amarjit, Schuetz, Erin G, Horst, Ronald L, Mao, Qingcheng, de Boer, Ian H, Thornton, Timothy A, Thummel, Kenneth E

“…Metabolism of 25-hydroxyvitamin D3 (25OHD3) plays a central role in regulating the biologic effects of vitamin D in the body. Although cytochrome…”
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Correction: Vitamin D4 in Mushrooms by Phillips, Katherine M., Horst, Ronald L., Koszewski, Nicholas J., Simon, Ryan R.

“…The level was highest in samples with known UV exposure: vitamin D enhanced portabella, and maitake mushrooms from one supplier (0.02–0.7 and 2.25–3.54 µg/100…”
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Human UGT1A4 and UGT1A3 Conjugate 25-Hydroxyvitamin D3: Metabolite Structure, Kinetics, Inducibility, and Interindividual Variability by Wang, Zhican, Wong, Timothy, Hashizume, Takanori, Dickmann, Leslie Z, Scian, Michele, Koszewski, Nicholas J, Goff, Jesse P, Horst, Ronald L, Chaudhry, Amarjit S, Schuetz, Erin G, Thummel, Kenneth E

“…25-Hydroxyvitamin D3 (25OHD3) is used as a clinical biomarker for assessment of vitamin D status. Blood levels of 25OHD3 represent a balance between its…”
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The assessment of circulating 25(OH)D and 1,25(OH)2D: Where we are and where we are going by Hollis, Bruce W., Horst, Ronald L.

“…The field of Vitamin D assay technology has progressed significantly over the past 4 decades. Further, the clinical utility of these measurements has moved…”
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Effects of Vitamin D3-Enriched Diet on Egg Yolk Vitamin D3 Content and Yolk Quality by Yao, Linxing, Wang, Tong, Persia, Michael, Horst, Ronald L., Higgins, Mallory

“…A 40‐wk experiment was conducted using Hy‐Line W‐36 laying hens (19‐wk old) to investigate the impact of feeding cholecalciferol‐enriched diets on egg yolk…”
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Vitamin D4 in mushrooms by Phillips, Katherine M, Horst, Ronald L, Koszewski, Nicholas J, Simon, Ryan R

“…An unknown vitamin D compound was observed in the HPLC-UV chromatogram of edible mushrooms in the course of analyzing vitamin D(2) as part of a food…”
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Plasma 25-Hydroxyvitamin D Levels and the Risk of Colorectal Cancer: The Multiethnic Cohort Study by WOOLCOTT, Christy G, WILKENS, Lynne R, NOMURA, Abraham M. Y, HORST, Ronald L, GOODMAN, Marc T, MURPHY, Suzanne P, HENDERSON, Brian E, KOLONEL, Laurence N, LE MARCHAND, Loïc

“…Vitamin D is obtained from the diet and synthesized in skin exposed to sunlight. Vitamin D status, assessed by circulating 25-hydroxyvitamin D [25(OH)D], has…”
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Serum 25-hydroxyvitamin D and risk of lung cancer in male smokers: a nested case-control study by Weinstein, Stephanie J, Yu, Kai, Horst, Ronald L, Parisi, Dominick, Virtamo, Jarmo, Albanes, Demetrius

“…A role for vitamin D in cancer risk reduction has been hypothesized, but few data exist for lung cancer. We investigated the relationship between vitamin D…”
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Pre-diagnostic circulating vitamin D and risk of melanoma in men by Major, Jacqueline M, Kiruthu, Christine, Weinstein, Stephanie J, Horst, Ronald L, Snyder, Kirk, Virtamo, Jarmo, Albanes, Demetrius

“…Various studies have examined the association between serum vitamin D levels and different cancers; however, this is the first prospective study of this…”
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Null Mutation in the Gene Encoding Plasma Membrane Ca2+-ATPase Isoform 2 Impairs Calcium Transport into Milk by Reinhardt, Timothy A, Lippolis, John D, Shull, Gary E, Horst, Ronald L

“…The means by which calcium is transported into the milk produced by mammary glands is a poorly understood process. One hypothesis is that it occurs during…”
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Adapting to the transition between gestation and lactation : Differences between rat, human and dairy cow by HORST, Ronald L, GOFF, Jesse P, REINHARDT, Timothy A

“…Adequate blood calcium concentrations are vital for the normal function of mammals. Mechanisms for maintaining normal blood calcium function adequately most of…”
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Prevalence of subclinical hypocalcemia in dairy herds by Reinhardt, Timothy A., Lippolis, John D., McCluskey, Brian J., Goff, Jesse P., Horst, Ronald L.

“…The prevalence of subclinical hypocalcemia in the transition cow is unknown. Cows with subclinical hypocalcemia have no clinical signs of hypocalcemia but may…”
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Exogenous versus endogenous recovery of 25-hydroxyvitamins D2 and D3 in human samples using high-performance liquid chromatography and the DiaSorin LIAISON Total-D Assay by Horst, Ronald L

“…Demand for circulating 25-hydroxyvitamin D [25(OH)D] measurements has exploded due to its relationship with many serious health problems. The present study was…”
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Hypercalcemia, Hypercalciuria, and Elevated Calcitriol Concentrations with Autosomal Dominant Transmission Due to CYP24A1 Mutations: Effects of Ketoconazole Therapy by Tebben, Peter J, Milliner, Dawn S, Horst, Ronald L, Harris, Peter C, Singh, Ravinder J, Wu, Yanhong, Foreman, John W, Chelminski, Paul R, Kumar, Rajiv

“…Background: Mutations of the CYP24A1 gene, which encodes the 1,25-dihydroxyvitamin D-24-hydroxylase cytochrome P450, Cyp24A1, are predicted to result in…”
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Vitamin D3 Is More Potent Than Vitamin D2 in Humans by Heaney, Robert P, Recker, Robert R, Grote, James, Horst, Ronald L, Armas, Laura A. G

“…Vitamin D3 increased serum 25(OH)D by 1.87× relative to an equimolar quantity of vitamin D2; very little of the administered vitamin was stored. Background:…”
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Androgens Attenuate Vitamin D Production Induced by UVB Irradiation of the Skin of Male Mice by an Enzymatic Mechanism by Xue, Yingben, Ying, Lee, Horst, Ronald L., Watson, Gordon, Goltzman, David

“…Cutaneous exposure to UVB irradiation is an important source of vitamin D. Here, we examined sex-specific differences in cutaneous vitamin D production in…”
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Inhibition of Mouse Breast Tumor-Initiating Cells by Calcitriol and Dietary Vitamin D by Jeong, Youngtae, Swami, Srilatha, Krishnan, Aruna V, Williams, Jasmaine D, Martin, Shanique, Horst, Ronald L, Albertelli, Megan A, Feldman, Brian J, Feldman, David, Diehn, Maximilian

“…The anticancer actions of vitamin D and its hormonally active form, calcitriol, have been extensively documented in clinical and preclinical studies. However,…”
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impact of delayed blood centrifuging, choice of collection tube, and type of assay on 25-hydroxyvitamin D concentrations by Yu, Chu-Ling, Falk, Roni T, Kimlin, Michael G, Rajaraman, Preetha, Sigurdson, Alice J, Horst, Ronald L, Cosentino, Louis M, Linet, Martha S, Freedman, D. Michal

“…Studies have examined the associations between cancers and circulating 25-hydroxyvitamin D [25(OH)D], but little is known about the impact of different…”
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