25-Hydroxyvitamin D3 26,23-lactone: a new in vivo metabolite of vitamin D.
Biochemistry, 1979/10/30;18(22):4775-80.
Wichmann JK, DeLuca HF, Schnoes HK, Horst RL, Shepard RM, Jorgensen NA
PMID: 228698
Impact factor: 3.321
Abstract
A major vitamin D metabolite was isolated in pure form from the blood plasma of chicks either maintenance levels or large doses of vitamin D3. The isolation involved methanol-chloroform extraction and five column chromatographic procedures. The metabolite purification and elution position on these columns were followed by a competitive protein binding assay. The metabolite was identified, using high- and low-resolution mass spectrometry, 270-MHz proton nuclear magnetic resonance spectrometry, ultraviolet absorption spectrophotometry, Fourier transform infrared spectrophotometry, and specific chemical reactions, as 3 beta,-25-dihydroxy-9,10-seco-5,7,10(19)-cholestatrieno-26,23-lactone. The trivial names 25-hydroxyvitamin D3 26,23-lactone or calcidiol 26,23-lactone are suggested for this compound.
MeSH terms
Animals; Chickens; Cholecalciferol; Hydroxycholecalciferols; Lactones; Magnetic Resonance Spectroscopy; Male; Mass Spectrometry; Spectrophotometry
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