Also, both ALT and AST levels were higher in diabetic subjects than in non-diabetic subjects (ALT and AST, means ± S.D., with vs. without diabetes, 27.6±16.7 vs. 22.8±11.4 and 26.5±10.7 vs. 24.5±6.9, p<0.001 and p = 0.004, respectively). This evidence concerns the gene GPT and diabetes mellitus.