Liver Fat in the Metabolic Syndrome (original) (raw)

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1_Department of Medicine (A.K., J.W., R.B., K.H.P., H.Y.-J.), Department of Psychiatry, University of Helsinki, FIN-00029 Helsinki, Finland_

4_Division of Minerva Medical Research Institute (A.K., R.B.), 00290 Helsinki, Finland_

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1_Department of Medicine (A.K., J.W., R.B., K.H.P., H.Y.-J.), Department of Psychiatry, University of Helsinki, FIN-00029 Helsinki, Finland_

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1_Department of Medicine (A.K., J.W., R.B., K.H.P., H.Y.-J.), Department of Psychiatry, University of Helsinki, FIN-00029 Helsinki, Finland_

4_Division of Minerva Medical Research Institute (A.K., R.B.), 00290 Helsinki, Finland_

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1_Department of Medicine (A.K., J.W., R.B., K.H.P., H.Y.-J.), Department of Psychiatry, University of Helsinki, FIN-00029 Helsinki, Finland_

2_Division of Diabetes, The Finnish Twin Cohort Study, Department of Public Health (K.H.P.), Department of Psychiatry, University of Helsinki, FIN-00029 Helsinki, Finland_

3_Division of Obesity Research Unit (K.H.P.), Department of Psychiatry, University of Helsinki, FIN-00029 Helsinki, Finland_

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1_Department of Medicine (A.K., J.W., R.B., K.H.P., H.Y.-J.), Department of Psychiatry, University of Helsinki, FIN-00029 Helsinki, Finland_

*Address all correspondence and requests for reprints to: Hannele Yki-Järvinen, M.D., F.R.C.P., Department of Medicine, Division of Diabetes, University of Helsinki, Finland, P.O. Box 700, Room C426B, FIN-00029 HUCH, Helsinki, Finland.

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Published:

01 September 2007

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Anna Kotronen, Jukka Westerbacka, Robert Bergholm, Kirsi H. Pietiläinen, Hannele Yki-Järvinen, Liver Fat in the Metabolic Syndrome, The Journal of Clinical Endocrinology & Metabolism, Volume 92, Issue 9, 1 September 2007, Pages 3490–3497, https://doi.org/10.1210/jc.2007-0482
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Abstract

Background: The liver, once fatty, overproduces components of the metabolic syndrome, such as glucose and lipids. The amount of liver fat in subjects with and without the metabolic syndrome has not been determined. It is unknown which clinically available markers best reflect liver fat content.

Measurements: Components of the metabolic syndrome as defined by the International Diabetes Federation and liver fat content by proton magnetic resonance spectroscopy were measured in 271 nondiabetic subjects (162 women, 109 men). In addition, other features of insulin resistance (serum insulin, C-peptide), intraabdominal and sc fat by magnetic resonance imaging, and liver enzymes (serum alanine aminotransferase and serum aspartate aminotransferase) were measured.

Results: Liver fat was 4-fold higher in subjects with [n = 116; median 8.2% (interquartile range 3.2–18.7%)] than without [n = 155; 2.0% (1.0–5.0%); P < 0.0001] the metabolic syndrome. This increase in liver fat remained significant after adjusting for age, gender, and body mass index. All components of the metabolic syndrome correlated with liver fat content. The best correlate was waist in both women (r = 0.59, P < 0.0001) and men (r = 0.56, P < 0.0001). Liver fat correlated significantly with serum alanine aminotransferase (r = 0.39, P < 0.0001 for women; r = 0.44, P < 0.0001 for men) and aspartate aminotransferase (r = 0.27, P = 0.0005 for women; r = 0.31, P = 0.0012 for men) concentrations. The best correlates of liver fat were fasting serum insulin (r = 0.61; P < 0.0001 for both women and men) and C-peptide (r = 0.62; P < 0.0001 for both women and men).

Conclusions: Liver fat content is significantly increased in subjects with the metabolic syndrome as compared with those without the syndrome, independently of age, gender, and body mass index. Of other markers, serum C-peptide is the strongest correlate of liver fat.

Copyright © 2007 by The Endocrine Society

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