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Obesity and Female Gender Increase Breath Ethanol.pdf

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Obesity and Female Gender Increase Breath Ethanol

Obesity and Female Gender Increase Breath Ethanol Concentration: Potential Implications for the Pathogenesis of Nonalcoholic Steatohepatitis Satheesh Nair, M.D., Keary Cope, B.S., Risby H. Terence, Ph.D., and Anna Mae Diehl, M.D. Department of Medicine, The Johns Hopkins University School of Medicine; and The Johns Hopkins University School of Public Health and Hygiene, Baltimore, Maryland OBJECTIVES: Similarities between histological features of alcoholic hepatitis and obesity-related liver disease suggest a common pathogenic mechanism. Because intestinal bac- teria can produce ethanol, it is conceivable that intestinally derived alcohol may contribute to fatty liver disease. An indirect way of measuring endogenous ethanol is to measure the breath ethanol concentration. In a previous study in ob/ob mice, breath ethanol decreased with a course of non- absorbable antibiotics, suggesting that the ethanol is derived from intestinal bacterial flora. The aims of this study were 1) to determine whether alcohol can be detected in the breath of human subjects, and 2) to assess whether there is any correlation between ethanol and obesity in patients with nonalcoholic steatohepatits (NASH) and control subjects without known liver disease. METHODS: Breath ethanol concentration was determined in 21 patients with biopsy-proven NASH and in 10 control subjects by gas chromatography. An abnormal breath etha- nol level was defined as two standard deviations above the mean value of the breath ethanol of lean controls. RESULTS: Minute quantities of ethanol were detected in the breath of human subjects who had not consumed alcohol in the recent past. Patients who were obese were more likely to have higher breath ethanol concentrations. Women also had higher breath alcohol than men. However, there was no difference between patients with NASH and controls. Se- verity of liver disease, as evidenced by cirrhosis, did not influence the breath ethanol concentration. CONCLUSIONS: Higher breat