2026-08-19T23:09:22Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/49652021-11-10T09:38:25Zcom_10259_4725com_10259_5086com_10259_2604col_10259_4726

00925njm 22002777a 4500 dc Villa Pérez, Pablo . author Merino, Beatriz author Fernández Díaz, Cristina M. . author Cidad, Pilar author Lobatón, Carmen D. author Moreno, Alfredo author Muturi, Harrison T. . author Ghadieh, Hilda E. . author Najjar, Sonia M. . author Leissring, Malcolm A. author Cózar Castellano, Irene author Perdomo Hernández, Germán M. author 2018-11 The role of insulin-degrading enzyme (IDE), a metalloprotease with high affinity for insulin, in insulin clearance remains poorly understood. OBJECTIVE: This study aimed to clarify whether IDE is a major mediator of insulin clearance, and to define its role in the etiology of hepatic insulin resistance. Methods We generated mice with liver-specific deletion of Ide (L-IDE-KO) and assessed insulin clearance and action. Results L-IDE-KO mice exhibited higher (~20%) fasting and non-fasting plasma glucose levels, glucose intolerance and insulin resistance. This phenotype was associated with ~30% lower plasma membrane insulin receptor levels in liver, as well as ~55% reduction in insulin-stimulated phosphorylation of the insulin receptor, and its downstream signaling molecules, AKT1 and AKT2 (reduced by ~40%). In addition, FoxO1 was aberrantly distributed in cellular nuclei, in parallel with up-regulation of the gluconeogenic genes Pck1 and G6pc. Surprisingly, L-IDE-KO mice showed similar plasma insulin levels and hepatic insulin clearance as control mice, despite reduced phosphorylation of the carcinoembryonic antigen-related cell adhesion molecule 1, which upon its insulin-stimulated phosphorylation, promotes receptor-mediated insulin uptake to be degraded. Conclusion IDE is not a rate-limiting regulator of plasma insulin levels in vivo 0026-0495 http://hdl.handle.net/10259/4965 10.1016/j.metabol.2018.08.001 nsulin-degrading enzyme Hepatic insulin resistance Insulin recepto Carcinoembryonic antigen-related cell adhesion molecule 1 Liver-specific ablation of insulin-degrading enzyme causes hepatic insulin resistance and glucose intolerance, without affecting insulin clearance in mice