Your browser doesn't support javascript.
loading
Increased liver fat, impaired insulin clearance, and hepatic and adipose tissue insulin resistance in type 2 diabetes.
Kotronen, Anna; Juurinen, Leena; Tiikkainen, Mirja; Vehkavaara, Satu; Yki-Järvinen, Hannele.
Afiliación
  • Kotronen A; Department of Medicine, Division of Diabetes, University of Helsinki, Helsinki, Finland. anna.kotronen@helsinki.fi
Gastroenterology ; 135(1): 122-30, 2008 Jul.
Article en En | MEDLINE | ID: mdl-18474251
BACKGROUND & AIMS: Liver fat is increased in type 2 diabetes. We determined whether it is associated with impaired insulin clearance and to what extent insulin resistance, impaired insulin clearance, or secretion contribute to fasting hyperinsulinemia. We also examined whether insulin suppression of serum free fatty acid (FFA) correlates with liver fat. METHODS: We compared 68 type 2 diabetic patients and age-, gender-, and body mass index (BMI)-matched nondiabetic subjects. Liver fat was determined by (1)H-MRS, body composition by magnetic resonance imaging, and insulin clearance and action on hepatic glucose production (HGP), glucose uptake, and serum FFA by the euglycemic insulin clamp technique (insulin 0.3 mU/kg x min) combined with infusion of [3-(3)H]glucose. RESULTS: Liver fat was 54% higher and insulin clearance 24% lower in type 2 diabetic patients than nondiabetic subjects. The percent suppression of both HGP and serum FFA by insulin were comparable, but serum insulin concentrations were significantly higher (34 mU/L [interquartile range, 30-39 mU/L] vs 25 mU/L [interquartile range, 22-30 mU/L]; P < .0001) in the type 2 diabetic than the nondiabetic subjects. When this difference was taken into account, both hepatic and adipose tissue insulin sensitivity were impaired in the type 2 diabetic subjects. Liver fat correlated with insulin clearance (r = -0.41; P = .001), and hepatic (r = 0.46; P = .0001) and adipose tissue (r = 0.55; P < .0001) insulin sensitivity. Hepatic but not peripheral insulin sensitivity was independently associated with liver fat content. Insulin clearance and secretion were independent determinants of fasting serum insulin. CONCLUSIONS: We conclude that increased liver fat, impaired insulin clearance, and hepatic and adipose tissue insulin resistance characterize type 2 diabetic patients.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Resistencia a la Insulina / Diabetes Mellitus Tipo 2 / Hígado Graso / Insulina Tipo de estudio: Diagnostic_studies Límite: Adult / Female / Humans / Male / Middle aged Idioma: En Revista: Gastroenterology Año: 2008 Tipo del documento: Article País de afiliación: Finlandia Pais de publicación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Resistencia a la Insulina / Diabetes Mellitus Tipo 2 / Hígado Graso / Insulina Tipo de estudio: Diagnostic_studies Límite: Adult / Female / Humans / Male / Middle aged Idioma: En Revista: Gastroenterology Año: 2008 Tipo del documento: Article País de afiliación: Finlandia Pais de publicación: Estados Unidos