5 research outputs found
Associations between liver histology and cortisol secretion in subjects with nonalcoholic fatty liver disease
Relationship of non-alcoholic hepatic steatosis to cortisol secretion in diet-controlled Type 2 diabetic patients
Relationship of nonalcoholic hepatic steatosis to overnight low-dose dexamethasone suppression test in obese individuals
A Comparative Biochemical Characterization of Microbial Transglutaminases: Commercial vs. a Newly Isolated Enzyme from Streptomyces Sp.
Cortisol clearance and associations with insulin sensitivity, body fat and fatty liver in middle-aged men
Aims/hypothesis The regulation of cortisol metabolism in vivo is not well understood. We evaluated the relationship between cortisol metabolism and insulin sensitivity, adjusting for total and regional fat content and for non-alcoholic fatty liver disease.Materials and methods Twenty-nine middle-aged healthy men with a wide range of BMI were recruited. We measured fat content by dual-energy X-ray absorptiometry and magnetic resonance imaging (MRI), liver fat by ultrasound and MRI, the hypothalamic-pituitary-adrenal axis by adrenal response to ACTH1-24, unconjugated urinary cortisol excretion, corticosteroid-binding globulin, and cortisol clearance by MS. We assessed insulin sensitivity by hyperinsulinaemic-euglycaemic clamp and by OGTT.Results Cortisol clearance was strongly inversely correlated with insulin sensitivity (M value) (r?=??0.61, p? =?0.002). Cortisol clearance was increased in people with fatty liver compared with those without (mean±SD: 243?±?10 vs 158?±?36 ml/min; p?=?0.014). Multiple regression modelling showed that the relationship between cortisol clearance and insulin sensitivity was independent of body fat. The relationship between fatty liver and insulin sensitivity was significantly influenced by body fat and cortisol clearance.Conclusions/interpretation Cortisol clearance is strongly associated with insulin sensitivity, independently of the amount of body fat. The relationship between fatty liver and insulin sensitivity is mediated in part by both fatness and cortisol clearance