Results 211 to 220 of about 71,944,619 (247)

Serum 25-Hydroxyvitamin D in Infantile Rickets

Pediatrics, 1976
In small children with nutritional vitamin D deficiency, the serum concentration of 25-hydroxyvitamin D (25-OH-D), the major circulating metabolite of vitamin D, was correlated with the stage of clinical disease. It was low (16 to 20 ng/ml) but within the normal range in the earliest (hypocalcemic) stage of the deficiency syndrome and decreased (& ...
S B, Arnaud, G B, Stickler, J C, Haworth
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Serum 25-hydroxyvitamin D in erythropoietic protoporphyria

British Journal of Dermatology, 2008
Vitamin D, produced by the action of sunlight on skin, is an important hormone for calcium homeostasis and has been implicated as tumour-protective agent. Some previous studies of photosensitive patients who actively avoid sunlight have failed to show convincing evidence of vitamin D insufficiency.The aim of this study was to characterize the vitamin D
S A, Holme, A V, Anstey, M N, Badminton, G H, Elder   +3 more
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25-Hydroxyvitamin D, cholesterol, and ultraviolet irradiation

Metabolism, 2008
Vitamin D deficiency may have implications for cardiovascular health. The purpose of this study was to determine the relationship of 25-hydroxyvitamin D (25[OH]D) to cholesterol and lipoprotein particles and to determine whether increasing 25(OH)D through ultraviolet (UV) irradiation impacted on these parameters in healthy young men and women. This was
Laura D, Carbone, E William, Rosenberg, Elizabeth A, Tolley, Michael F, Holick, Thomas A, Hughes, Mitchell A, Watsky, Karen D, Barrow, Tai C, Chen, Nathaniel K, Wilkin, Syamal K, Bhattacharya, John C, Dowdy, Robert M, Sayre, Karl T, Weber   +12 more
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3-Epi-25 hydroxyvitamin D in pregnancy

Pregnancy Hypertension: An International Journal of Women's Cardiovascular Health, 2014
The physiological importance of the C3 epimers of vitamin D (3-epi-25OHD2/3) is uncertain and there have been limited studies determining the levels of these epimers in human populations. The aims of the current study were (1) to determine 3-epi-25OHD2/3 levels throughout non-diabetic and T1DM pregnancy, (2) to examine the relationships between 25OHD ...
S E, Bennett, C, Casey, J, McPeake, D R, McCance, J G, Manderson, A, McGinty   +5 more
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The 25-hydroxyvitamin D threshold for better health

The Journal of Steroid Biochemistry and Molecular Biology, 2007
Available data supporting a target serum level of at least 75 nmol/l 25-hydroxyvitamin D (25-OHD) include studies on bone mineral density (bmd), fracture prevention, lower extremity function, and cancer prevention. Given the high cost and disability from falls, fractures, and cancer treatment a shared threshold for 25-OHD has significant public health ...
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THE PLASMA LEVELS OF 25‐HYDROXYVITAMIN D IN PATIENTS WITH VARIOUS LIVER DISEASES AND THE RESPONSE OF 25‐HYDROXYVITAMIN D TO VITAMIN D TREATMENT

Acta Paediatrica, 1978
ABSTRACT. The mean plasma levels of 25‐hydroxyvitamin D (25‐OH‐D) were measured before and after the administration of 2000 units of daily oral vitamin D2 for a period of 2 weeks in 9 normal infants and children, 7 infants with neonatal hepatitis and persistent neonatal hepatitis, and 4 infants with congenital biliary atresia. The mean plasma level of
Y, Seino, T, Shimotsuji, H, Kai, C, Ikehara, H, Yabuuchi   +4 more
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Measurement of 25-hydroxyvitamin D₃and 25-hydroxyvitamin D₂in clinical settings

Scandinavian Journal of Clinical and Laboratory Investigation, 1984
A quick and simple method for the selective measurement of 25-hydroxyvitamin D3 (25OHD3) and 25-hydroxyvitamin D2 (25OHD2) is described. It includes a rapid sample preparation technique and a combination of a selective radioimmunoassay for 25OHD3 and a competitive protein-binding assay using vitamin D-binding protein for the determination of total ...
L, Hummer, L, Tjellesen, H, Rickers, C, Christiansen   +3 more
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The 25-Hydroxyvitamin D 24-Hydroxylase

2005
This chapter reviews the role of 25-hydroxyvitamin D 24-hydroxylase in vitamin D metabolism. The 24-hydroxylase enzyme is a widely distributed component of the vitamin D pathway. It is regulated by a spectrum of hormones and functions to synthesise 24-hydroxylated metabolites, with preferential action in promoting bone mineralization and possibly other
Omdahl, John L., May, B.
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25-Hydroxyvitamin D in Patients With Cognitive Decline

JAMA Neurology, 2016
Sevilay, Muratli, Ozlem, Soyluk, Fatih, Tufan   +2 more
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Treatment with 50,000 IU vitamin D₂ every other week and effect on serum 25-hydroxyvitamin D₂, 25-hydroxyvitamin D₃, and total 25-hydroxyvitamin D in a clinical setting.

Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists, 2012
To examine the effect of 50,000 IU-vitamin D₂ supplementation in a clinical setting on serum total 25-hydroxyvitamin D (25[OH]D), 25-hydroxyvitamin D₂ (25[OH]D₂), and 25-hydroxyvitamin D3 (25[OH]D₃).This retrospective cohort study was performed in an urban tertiary referral hospital in Boston, Massachusetts.
Emily T W, Demetriou, Thomas G, Travison, Michael F, Holick   +2 more
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