Diagnostic method for diabetes using C-13 labeled pyruvic acid

Abstract

The present invention relates to a diagnostic agent for diabetes, which comprises glucose labelled with 13 C at a specific position, or pyruvic acid labelled with 13 C at least one specific position. According to the present invention, there is provided a diagnostic agent for diabetes which can be used safely without side effects to give accurate results immediately with less physical pains on the subject. The present diagnostic agent for diabetes can distinguish between healthy persons and patients with diabetes even under the circumstances where the patients are easily missed, and further it can determine the type of diabetes (insulin-dependent type or insulin-independent type).

What is claimed is:  
     
       1. A method for detecting a diabetic condition in a subject comprising: 
       a) administering to said subject an effective amount of pyruvic acid labeled with  13 C at a specific position; and  
       b) measuring a level of exhaled labeled CO 2 , wherein a reduced  an increased level of exhaled labeled CO 2  compared to normal is indicative of an increased likelihood of said subject having or suffering from said diabetic condition.  
     
     
       2. The method according to  claim 1 , wherein said pyruvic acid labeled with  13 C at a specific position is selected from the group consisting of 1- 13 C-pyruvic acid, 2- 13 C-pyruvic acid and 3- 13 C-pyruvic acid.