Methods of assessing crohn's disease patient phenotype by...

G - Physics – 01 – N

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G01N 33/569 (2006.01) G01N 33/564 (2006.01)

Patent

CA 2519696

The invention provides a method of diagnosing or predicting susceptibility to a clinical subtype of Crohn's disease in a subject having Crohn's disease by determining the presence or absence of IgA anti-I2 antibodies in the subject, where the presence of the IgA anti-I2 antibodies indicates that the subject has a clinical subtype of Crohn's disease. In one embodiment, a method of the invention is practiced by further determining the presence or absence in the subject of a NOD2 variant, anti-Saccharomyces cerevisiae antibodies (ASCA), IgA anti-OmpC antibodies, or perinuclear anti-neutrophil cytoplasmic antibodies (pANCA). The methods of the invention can be used to diagnose or predict susceptibility to a clinical subtype of Crohn's disease, for example, a fibrostenotic subtype, a subtype characterized by the need for small bowel surgery, or a subtype characterized by the absence of features of ulcerative colitis.

L'invention concerne un procédé de diagnostic ou de prévision de la vulnérabilité à un sous-type clinique de la maladie de Crohn chez un sujet souffrant de la maladie de Crohn par la détermination de la présence ou de l'absence d'anticorps IgA anti-I2 chez le sujet, la présence des anticorps IgA anti-I2 indiquant que le sujet a un sous-type clinique de la maladie de Crohn. Dans un mode de réalisation un procédé de l'invention est mis en pratique par la détermination de la présence ou de l'absence chez le sujet d'un variant de NOD2, d'anticorps anti-Saccharomyces cerevisiae antibodies (ASCA), d'anticorps IgA anti-OmpC ou d'anticorps cytoplasmiques périnucléaires anti-neutrophiles (pANCA). Les procédés de l'invention peuvent s'utiliser pour diagnostiquer ou prédire la vulnérabilité à un sous-type clinique de la maladie de Crohn, par exemple, d'un sous-type fibrosténique, d'un sous-type caractérisé par la besoin d'une transplantation de l'estomac grêle ou par un sous-type caractérisé par l'absence de caractéristiques de la colite ulcéreuse.

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