Method and apparatus useful for detecting bloodgroup...

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G01N 33/80 (2006.01) G01N 33/49 (2006.01) G01N 33/543 (2006.01) G01N 33/555 (2006.01)

Patent

CA 2190462

The direct assay comprises adding a sample of erythrocytes to a reaction tube charged with a column of immunoreactive particles having an immunoglobulin binding ligand selected from the group consisting of Protein A, Protein G, Protein A/G or a universal kappa light chain binding protein coupled to the surface of the particles. Antibodies specific for bloodgroup antigens tested for are coupled to the ligand on the particles. The indirect assay comprises obtaining either a sample of erythrocytes or a sample of blood serum to be tested and mixing the erythrocytes or serum with a known antibody or antigen reagent, depending on whether antigens or antibodies are being tested for. The mixture is incubated in a reaction tube above a column of immunoreactive particles having immunoglobulin binding ligands selected from the group consisting of Protein A, Protein G, Protein A/G or a universal kappa light chain binding protein coupled to the surface of the particles. A positive response is indicated by binding of the erythrocytes to the immunoreactive particles in the upper one-half of the reaction tube. A negative response is indicated by the erythrocytes being forced to the bottom of the reaction tube in a pellet.

Le dosage direct consiste à ajouter un échantillon d'érythrocytes à un tube de réaction chargé d'une colonne de particules immunoréactives présentant un ligand fixant les immunoglobulines, choisi dans le groupe constitué de la Protéine A, Protéine G, Protéine A/G ou d'une protéine universelle fixant les chaînes légères kappa et couplée à la surface des particules. Les anticorps spécifiques contre les antigènes érythrocytaires recherchés sont couplés au ligand sur les particules. Le dosage indirect consiste à obtenir soit un échantillon d'érythrocytes, soit un échantillon de sérum sanguin à tester, et à mélanger les érythrocytes ou le sérum avec un réactif anticorpal ou antigénique connu, selon que l'on recherche des antigènes ou des anticorps. Le mélange est incubé dans un tube de réaction au-dessus d'une colonne de particules immunoréactives présentant des ligands fixant les immunoglobulines, choisis dans le groupe composé de la Protéine A, Protéine G, Protéine A/G ou d'une protéine universelle fixant les chaînes légères kappa et couplée à la surface des particules. La fixation des érythrocytes sur les particules immunoréactives dans la moitié supérieure du tube de réaction révèle une réaction positive. Le refoulement des érythrocytes vers le fond du tube de réaction sous forme d'un pellet révèle une réaction négative.

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