Improved measurement of vitamin d

G - Physics – 01 – N

Patent

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G01N 33/82 (2006.01)

Patent

CA 2649338

The present invention relates to a method of measuring a vitamin D metabolite in a sample, the method comprising the steps of (a) treating said sample with a vitamin D metabolite releasing reagent under conditions appropriate to release a vitamin D metabolite from vitamin D-binding protein and not to cause protein precipitation, (b) subjecting the treated sample obtained in step (a) to a chromatographic separation, and (c) measuring a vitamin D metabolite during or after said chromatographic separation. The present invention also relates to methods for determining the vitamin D status of a subject, for use in the diagnosis of disease, and to agents and kits for use in performing the methods of the invention.

La présente invention concerne un procédé de mesure d'un métabolite de vitamine D dans un échantillon, le procédé comprenant les étapes consistant (a) à traiter ledit échantillon avec un réactif de libération de métabolite de vitamine D dans des conditions appropriées pour libérer le métabolite de vitamine D d'une protéine de liaison de vitamine D sans causer de précipitation de la protéine, (b) à soumettre l'échantillon traité obtenu dans l'étape (a) à une séparation chromatographique, et (c) à mesurer un métabolite de vitamine D durant ou après ladite séparation chromatographique. La présente invention concerne en outre des procédés pour déterminer l'état de la vitamine D chez un sujet, en vue de son utilisation dans le diagnostic thérapeutique, ainsi que des agents et des kits utilisés dans la conduite des procédés de l'invention.

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