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Synthesis of Deuterium-Labeled Vitamin D Metabolites as Internal Standards for LC-MS Analysis.


ABSTRACT: Blood levels of the vitamin D3 (D3) metabolites 25-hydroxyvitamin D3 (25(OH)D3), 24R,25-dihydroxyvitamin D3, and 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3) are recognized indicators for the diagnosis of bone metabolism-related diseases, D3 deficiency-related diseases, and hypercalcemia, and are generally measured by liquid-chromatography tandem mass spectrometry (LC-MS/MS) using an isotope dilution method. However, other D3 metabolites, such as 20-hydroxyvitamin D3 and lactone D3, also show interesting biological activities and stable isotope-labeled derivatives are required for LC-MS/MS analysis of their concentrations in serum. Here, we describe a versatile synthesis of deuterium-labeled D3 metabolites using A-ring synthons containing three deuterium atoms. Deuterium-labeled 25(OH)D3 (2), 25(OH)D3-23,26-lactone (6), and 1,25(OH)2D3-23,26-lactone (7) were synthesized, and successfully applied as internal standards for the measurement of these compounds in pooled human serum. This is the first quantification of 1,25(OH)2D3-23,26-lactone (7) in human serum.

SUBMITTER: Nagata A 

PROVIDER: S-EPMC9025501 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature

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Synthesis of Deuterium-Labeled Vitamin D Metabolites as Internal Standards for LC-MS Analysis.

Nagata Akiko A   Iijima Kazuto K   Sakamoto Ryota R   Mizumoto Yuka Y   Iwaki Miho M   Takiwaki Masaki M   Kikutani Yoshikuni Y   Fukuzawa Seketsu S   Odagi Minami M   Tera Masayuki M   Nagasawa Kazuo K  

Molecules (Basel, Switzerland) 20220409 8


Blood levels of the vitamin D<sub>3</sub> (D<sub>3</sub>) metabolites 25-hydroxyvitamin D<sub>3</sub> (25(OH)D<sub>3</sub>), 24<i>R</i>,25-dihydroxyvitamin D<sub>3</sub>, and 1α,25-dihydroxyvitamin D<sub>3</sub> (1,25(OH)<sub>2</sub>D<sub>3</sub>) are recognized indicators for the diagnosis of bone metabolism-related diseases, D<sub>3</sub> deficiency-related diseases, and hypercalcemia, and are generally measured by liquid-chromatography tandem mass spectrometry (LC-MS/MS) using an isotope dilu  ...[more]

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