Inspection method enabling specific diagnosis of pathological state of diabetic nephropathy at early stage

摘要

Provided is an inspection method which enables specific diagnosis of the pathological state of diabetic nephropathy at an early stage. The method, which aims at the detection of the onset or onset risk of diabetic nephropathy, comprises measuring IgG4 in a biological sample derived from a subject. The inspection method may further comprise measuring Smad1 in the biological sample derived from the subject, said method preferably comprising measuring both.