Horm Metab Res 2010; 42(12): 854-859
DOI: 10.1055/s-0030-1267186
Original Basic

© Georg Thieme Verlag KG Stuttgart · New York

A Promoter Polymorphism in the Liver-specific Fatty Acid Transport Protein 5 is Associated with Features of the Metabolic Syndrome and Steatosis

A. Auinger1 , 2 , L. Valenti3 , M. Pfeuffer1 , 2 , U. Helwig4 , J. Herrmann1 , 2 , A. L. Fracanzani3 , P. Dongiovanni3 , S. Fargion3 , J. Schrezenmeir1 , 2 , D. Rubin4
  • 1Max Rubner-Institute, Federal Research Institute of Nutrition and Food, Department of Physiology and Biochemistry of Nutrition, Kiel, Germany
  • 2Max Rubner-Institute, Federal Research Institute of Nutrition and Food, Department of Physiology and Biochemistry of Nutrition, Karlsruhe, Germany
  • 3Dipartimento di Medicina Interna, UO Medicina Interna IB, Padiglione Granelli Universita’ degli Studi di Milano, Ospedale Policlinico Mangialli e Regina Elena Fondazione IRCCS, Università di Milano, Milan, Italy
  • 4University Hospital Schleswig-Holstein (UKSH), Campus Kiel, Clinic for General Internal Medicine, I. Medical Department, Kiel, Germany
Further Information

Publication History

received 10.03.2010

accepted 08.09.2010

Publication Date:
13 October 2010 (online)

Zoom Image

Abstract

The fatty acid transport protein 5 (FATP5) is exclusively expressed in the liver and is involved in hepatic lipid and bile metabolism. We investigated whether a variation in the FATP5 promoter (rs56225452) is associated with hepatic steatosis and further features of the metabolic syndrome. A total of 716 male subjects from the Metabolic Intervention Cohort Kiel (MICK) and 103 male subjects with histologically proved nonalcoholic fatty liver disease (NAFLD) were genotyped for this FATP5 polymorphism rs56225452 and phenotyped for features of the metabolic syndrome. In the MICK cohort, ALT activities, postprandial insulin, and triglyceride concentrations were higher in subjects carrying the rare A-allele compared to GG homozygotes. Accordingly, the insulin sensitivity index determined after a mixed meal and standardized glucose load was lower in A-allele carriers. NAFLD cases carrying allele A were presented with also higher ALT activities. In NAFLD subjects, the association of BMI with the degree of steatosis and glucose concentration differed across FATP5 promoter polymorphism. The FATP5 promoter polymorphism rs56225452 is associated with higher ALT activity, insulin resistance, and dyslipidemia in the general population. The impact of the BMI on the severity of steatosis in NAFLD cases seems to depend on the FATP5 polmorphism.