Abstract 
         
         Mutations in the hepatocyte nuclear factor-1-alpha gene cause maturity onset diabetes
            of the young 3 (MODY 3). Here we describe a new family affected by this disorder carrying
            the so far unknown mutation Pro224Ser in exon 3. First we identified a 17-year-old
            patient. OGTT demonstrated that insulin secretion was severely impaired: basal insulin
            was 3.7 uU/ml and 60 min after an oral glucose load plasma insulin peaked only threefold
            to 10.7 uU/ml. In addition, this patient carries the homozygous polymorphism Ile27Leu
            (exon1) in the hepatocyte nuclear factor-1-alpha gene that was shown to be associated
            with insulin resistance. So far, we have no evidence for insulin resistance in this
            individual patient. Additionally, two other family members carry the hepatocyte nuclear
            factor-1-alpha mutation Pro224Ser and the homozygous polymorphism Ile27Leu. A similar
            case with these two mutations in the HNF-1-alpha gene has not been described before.
            This data will allow to discover more patients with MODY 3.
         
         
         
            
Key words 
         
         
            MODY 3 - HNF-1 alpha - insulin secretion - I27L polymorphism - diabetes mellitus
          
       
    
   
      
         References 
         
         
             
         1  
            †  Deceased on August 16, 2003.
         
         
         M.Epe@endokrinologikum.com