Results 201 to 210 of about 71,944,619 (247)

Association of serum 25-hydroxyvitamin D levels with indicators of target organ damage in patients with diabetes: a cross-sectional study. [PDF]

Front Endocrinol (Lausanne)
Wang M, Huang Y, Gong Y, Li L, Zeng Z, Jiang C, Ji G.   +6 more
europepmc   +1 more source

Association between body roundness index and serum 25-hydroxyvitamin D in women with and without breast cancer: A cross-sectional analysis of NHANES 2001-2018. [PDF]

Medicine (Baltimore)
Du Y, Huang M, Su T, Su T, Huang X, Zheng Z.   +5 more
europepmc   +1 more source

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Measured free 25-hydroxyvitamin D in healthy children and relationship to total 25-hydroxyvitamin D, calculated free 25-hydroxyvitamin D and vitamin D binding protein

Clinical Biochemistry, 2018
vitamin D deficiency in children is still a global health problem. Measuring free 25-hydroxyvitamin D concentrations could provide a better estimate of the vitamin D status than total 25-hydroxyvitamin D (25(OH)D) levels.To assess the relationship between measured free vitamin D (m-f25(OH)D) and calculated free 25(OH)D (c-f25(OH)D), total 25(OH)D ...
Maria, Lopez-Molina, Cecilia, Santillan, Marta, Murillo, Aina, Valls, Laura, Bosch, Joan, Bel, María Luisa, Granada   +6 more
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Circulating 25-hydroxyvitamin D in man

The American Journal of Medicine, 1974
Abstract Measurement by bioassay of the antiricketic sterol content of crude biologic extracts is tedious, insensitive and incapable of estimating the separate contributions made by vitamin D and its metabolites, which vary in their biologic potency.
J G, Haddad, T C, Stamp
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Enhanced 3-Epi-25-Hydroxyvitamin D3 Signal Leads to Overestimation of Its Concentration and Amplifies Interference in 25-Hydroxyvitamin D LC-MS/MS Assays [PDF]

Annals of Clinical Biochemistry, 2014
Background 3-epi-25-hydroxyvitamin D3 (3-epi-25OHD3) interferes in most liquid chromatography-tandem mass spectrometry (LC-MS/MS) assays for 25-hydroxyvitamin D (25OHD).
Lam, F, Flynn, N, Dawnay, A
exaly   +1 more source

25-Hydroxyvitamin D isomerizes to pre-25-hydroxyvitamin D in solution: considerations for calibration in clinical measurements

Analytical and Bioanalytical Chemistry, 2015
Reference standards for the vitamin D metabolites 25-hydroxyvitamin D3, 25-hydroxyvitamin D2, and 3-epi-25-hydroxyvitamin D3 were evaluated using liquid chromatography (LC) with ultraviolet (UV) absorbance and mass spectrometric (MS) detection to assess purity.
Mary, Bedner, Katrice A, Lippa
openaire   +2 more sources

Low 25‐hydroxyvitamin D, but not the bioavailable fraction of 25‐hydroxyvitamin D, is a risk factor for multiple sclerosis

European Journal of Neurology, 2015
Background and purposeLow 25‐hydroxyvitamin D [25(OH)D] levels correlate with higher disease activity in patients with multiple sclerosis (MS). However, it is not clear whether low 25(OH)D levels directly contribute to increased disease activity or merely represent a consequence of reduced endogenous vitamin D synthesis in more disabled MS patients ...
Janina R, Behrens, Ludwig, Rasche, Rene M, Gieß, Catherina, Pfuhl, Katharina, Wakonig, Erik, Freitag, Katrin, Deuschle, Judith, Bellmann-Strobl, Friedemann, Paul, Klemens, Ruprecht, Jan, Dörr   +10 more
openaire   +2 more sources

25-Hydroxyvitamin D

Archives of Internal Medicine, 1978
During the first three days of life newborns exhibit a decrease in serum ionized calcium level (Ca ++ ). 1 A pathological exacerbation of this process may occur in premature infants, infants born to mothers who are diabetic, and sick infants of any gestational age who were asphyxiated and required active resuscitation.
openaire   +1 more source

25-Hydroxyvitamin D: Analysis and clinical application

Clinica Chimica Acta, 2014
25-Hydroxyvitamin D (25-OHD) is one of the most popular tests requested by clinicians nowadays because in addition to bone diseases, many non-skeletal disorders have been suggested to be linked to vitamin D deficiency or insufficiency. Methodologies used in clinical laboratories include competitive vitamin D protein binding assays (CPBA), immunoassays,
Zengliu, Su, Satya Nandana, Narla, Yusheng, Zhu   +2 more
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