It was found that the AMI subjects (n=29) who had no history of diabetes mellitus were overtly hyperglycemic (>130 mg/dL ) with concomitant reduction of insulin level (19 to 0 μunits /dl) that accompanied the increase of plasma dermcidin level from normal (basal) 9 nM to 112 nM (p<0.0001) . This evidence concerns the gene DCD and diabetes mellitus.