Differential hemolysis of a whole blood sample

G - Physics – 01 – N

Patent

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Details

G01N 30/06 (2006.01) G01N 1/38 (2006.01) G01N 33/50 (2006.01) G01N 30/02 (2006.01) G01N 30/60 (2006.01) G01N 30/72 (2006.01)

Patent

CA 2649633

The invention relates to a method for differentially hemolyzing whole blood. It discloses method for detecting an analyte in a liquid sample known or suspected to comprise red blood cells and suspected or known to comprise eukaryotic cells, the method comprising the steps of processing said liquid sample with a membrane solubilizing agent under conditions appropriate to lyse cell membranes of red blood cells and at the same time not to cause precipitation of sample constituents, subjecting the processed sample to a chromatographic separation, and detecting the analyte. The differential hemolysis of red blood cells is of advantage in a method of detecting an analyte in a liquid sample that may comprise both erythrocytes as well as nucleated cells. The differential solubilization of red blood cells can be easily combined with an online detection methodology, like LC-MS, and is advantageous in the detection of many analytes, e.g. in the detection of folate or of immunosuppressive drugs, like tacrolimus or sirolimus.

L'invention concerne un procédé d'hémolyse différentielle de tout le sang, permettant de détecter un analyte dans un échantillon liquide qui comprend ou risque de comprendre des globules rouges et qui comprend ou risque de comprendre des cellules eucaryotes, le procédé comprenant les phases consistant à traiter ledit échantillon liquide avec un agent de solubilisation de membrane dans des conditions appropriées pour lyser des membranes cellulaires de globules rouges sans pour autant provoquer la précipitation d'éléments constitutifs d'échantillon, à soumettre l'échantillon traité à une séparation chromatographique, et à détecter l'analyte. L'hémolyse différentielle de globules rouges est avantageuse dans un procédé de détection d'un analyte dans un échantillon liquide pouvant comprendre à la fois des érythrocytes et des cellules nucléées. La solubilisation différentielle de globules rouges peut être facilement combinée à une méthodologie de détection en ligne, comme le LC-MS, et est avantageuse dans la détection de nombreux analytes, par exemple dans la détection de folate ou de médicaments immunosuppresseurs, comme le tacrolimus ou le sirolimus.

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