Non-thiopurine methyltransferase related effects in...

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving nucleic acid

Reexamination Certificate

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C435S091100, C435S091200, C536S023100, C536S024300

Reexamination Certificate

active

07919251

ABSTRACT:
The present invention provides methods for predicting tolerance associated with 6-mercaptopurine drug treatment of an immune-mediated gastrointestinal disorder such as inflammatory bowel disease. In particular, the present invention provides methods for predicting a patient's risk of an adverse drug reaction (or tolerance) to a 6-mercaptopurine drug by genotyping a patient at a polymorphic site in at least one gene selected from the group consisting of a xanthine dehydrogenase (XDH) gene, molybdenum cofactor sulfurase (MOCOS) gene, and aldehyde oxidase (AOX) gene. The present invention further provides methods for optimizing therapeutic efficacy in a patient receiving a 6-mercaptopurine drug by determining whether the patient should be given an alternative drug based on the presence or absence of a polymorphism in at least one of the XDH, MOCOS, and AOX genes.

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