title: Effects of 11β-hydroxysteroid dehydrogenase-1 inhibition on hepatic glycogenolysis and gluconeogenesis.
abstract: The aim of this study was to determine the effect of prolonged 11β-hydroxysteroid dehydrogenase-1 (11β-HSD1) inhibition on basal and hormone-stimulated glucose metabolism in fasted conscious dogs. For 7 days prior to study, either an 11β-HSD1 inhibitor (HSD1-I; n = 6) or placebo (PBO; n = 6) was administered. After the basal period, a 4-h metabolic challenge followed, where glucagon (3×-basal), epinephrine (5×-basal), and insulin (2×-basal) concentrations were increased. Hepatic glucose fluxes did not differ between groups during the basal period. In response to the metabolic challenge, hepatic glucose production was stimulated in PBO, resulting in hyperglycemia such that exogenous glucose was required in HSD-I (P < 0.05) to match the glycemia between groups. Net hepatic glucose output and endogenous glucose production were decreased by 11β-HSD1 inhibition (P < 0.05) due to a reduction in net hepatic glycogenolysis (P < 0.05), with no effect on gluconeogenic flux compared with PBO. In addition, glucose utilization (P < 0.05) and the suppression of lipolysis were increased (P < 0.05) in HSD-I compared with PBO. These data suggest that inhibition of 11β-HSD1 may be of therapeutic value in the treatment of diseases characterized by insulin resistance and excessive hepatic glucose production.
authors: Department of Molecular Physiology and Biophysics, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
authors: J J
authors: JJ
authors: Winnick
authors: C J
authors: CJ
authors: Ramnanan
authors: V
authors: V
authors: Saraswathi
authors: J
authors: J
authors: Roop
authors: M
authors: M
authors: Scott
authors: P
authors: P
authors: Jacobson
authors: P
authors: P
authors: Jung
authors: R
authors: R
authors: Basu
authors: A D
authors: AD
authors: Cherrington
authors: D S
authors: DS
authors: Edgerton
mesh_terms: D043205:11-beta-Hydroxysteroid Dehydrogenase Type 1 / Q000037:antagonists & inhibitors* / Q000378:metabolism; D000818:Animals; D004285:Dogs; D005260:Female; D005934:Glucagon / Q000187:drug effects / Q000378:metabolism; D005943:Gluconeogenesis / Q000502:physiology*; D005947:Glucose / Q000378:metabolism; D050261:Glycogenolysis / Q000502:physiology*; D006854:Hydrocortisone / Q000378:metabolism*; D008099:Liver / Q000378:metabolism*; D008297:Male
chemical_list: D005934:Glucagon; D043205:11-beta-Hydroxysteroid Dehydrogenase Type 1; D005947:Glucose; D006854:Hydrocortisone
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