Clinical Significance of Serum Leptin Levels in the Diagnosis of Fatty Liver / 日本農村医学会雑誌

ABSTRACT

We examined the usefulness of serum leptin concentration as an index for the diagnosis of fatty liver. Twenty-two patients diagnosed with fatty liver by abdominal ultrasonography, participated in this study together with 7 indinduels as controls. As laboratory findings showed, body fat percentage (29.5±1.4 vs 19.1±1.6%, P<0.001), BMI (25.7±0.7 vs 20.8±1.0 kg/m2, P<0.005), procollagen III peptide (P III P) (0.58±0.04 vs 0.42±0.04 U/ml, P<0.05), and serum leptin levels (7.3±1.0 vs 2.9±0.5 ng/ml, P<0.001) were significantly higher in the fatty liver group than in the control group. Serum leptin levels were correlated significantly with body fat percentage (r=0.76, P<0.0001) and BMI (r=0.61, P<0.001), though there was a significant correlation between serum leptin levels and liver-kidney contrast (r=0.47, P<0.05) only in males. In addition, when the fatty liver group was classified into two groups by GPT levels, m-GOT (mitochondrial glutamate-oxaloacetate transaminase) (8.6±1.0 vs 5.7±1.0 IU/l/37°C, P<0.05) and P III P (0.65±0.06 vs 0.49±0.04 U/ml, P<0.05) were significantly higher in the elevated GPT group than in the normal GPT group.These results suggest that serum leptin levels may be indicative of fatty liver and that fatty liver is not always a reversible disease.