DIAGNOSTIC IN VITRO METHOD

摘要

Disclosed is a diagnostic in vitro method for determining the activity of thiopurine S-methyltransferase (TPMT) in individuals to be examined, characterized in that the content of urothione and/or jukathione in body fluids is determined. Also disclosed is a diagnostic in vitro method for determining the TPMT activity in cellular extracts of test subjects of any origin, characterized in that molybdenum cofactor (Moco) and/or decomposition stages of Moco are used as substrates for the reaction and the formed quantity of jukathione and/or urothione is determined. Finally, a diagnostic in vitro method is disclosed, wherein urothione and/or jukathione serves as a biomarker for an increased susceptibility with regard to one or more particular diseases, which is determined in body fluids and/or cellular extracts.