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Levothyroxine enhances glucose clearance and blunts the onset of experimental type 1 diabetes mellitus in mice.
López-Noriega, Livia; Cobo-Vuilleumier, Nadia; Narbona-Pérez, Álvaro Jesús; Araujo-Garrido, Juan Luis; Lorenzo, Petra Isabel; Mellado-Gil, José Manuel; Moreno, José Carlos; Gauthier, Benoit R; Martín-Montalvo, Alejandro.
Afiliação
  • López-Noriega L; Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain.
  • Cobo-Vuilleumier N; Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain.
  • Narbona-Pérez ÁJ; Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain.
  • Araujo-Garrido JL; Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain.
  • Lorenzo PI; Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain.
  • Mellado-Gil JM; Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain.
  • Moreno JC; Thyroid Molecular Laboratory, Institute for Medical and Molecular Genetics (INGEMM), La Paz University Hospital, Autonomous University of Madrid, Madrid, Spain.
  • Gauthier BR; Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain.
  • Martín-Montalvo A; Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain.
Br J Pharmacol ; 174(21): 3795-3810, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28800677
ABSTRACT
BACKGROUND AND

PURPOSE:

Thyroid hormones induce several changes in whole body metabolism that are known to improve metabolic homeostasis. However, adverse side effects have prevented its use in the clinic. In view of the promising effects of thyroid hormones, we investigated the effects of levothyroxine supplementation on glucose homeostasis. EXPERIMENTAL

APPROACH:

C57BL/6 mice were treated with levothyroxine from birth to 24 weeks of age, when mice were killed. The effects of levothyroxine supplementation on metabolic health were determined. C57BL/6 mice treated with levothyroxine for 2 weeks and then challenged with streptozotocin to monitor survival. Mechanistic experiments were conducted in the pancreas, liver and skeletal muscle. RIP-B7.1 mice were treated with levothyroxine for 2 weeks and were subsequently immunized to trigger experimental autoimmune diabetes (EAD). Metabolic tests were performed. Mice were killed and metabolic tissues were extracted for immunohistological analyses. KEY

RESULTS:

Long-term levothyroxine supplementation enhanced glucose clearance and reduced circulating glucose in C57BL/6 mice. Levothyroxine increased simultaneously the proliferation and apoptosis of pancreatic beta cells, promoting the maintenance of a highly insulin-expressing beta cell population. Levothyroxine increased circulating insulin levels, inducing sustained activation of IRS1-AKT signalling in insulin-target tissues. Levothyroxine-treated C57BL/6 mice challenged with streptozotocin exhibited extended survival. Levothyroxine blunted the onset of EAD in RIP-B7.1 mice by inducing beta cell proliferation and preservation of insulin-expressing cells. CONCLUSIONS AND IMPLICATIONS Interventions based on the use of thyroid hormones or thyromimetics could be explored to provide therapeutic benefit in patients with type 1 diabetes mellitus.
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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Tiroxina / Diabetes Mellitus Experimental / Diabetes Mellitus Tipo 1 / Glucose Limite: Animais Idioma: Inglês Revista: Br J Pharmacol Ano de publicação: 2017 Tipo de documento: Artigo País de afiliação: Espanha