| Full text | |
| Author(s): |
Borck, Patricia Cristine
[1]
;
Vettorazzi, Jean Franciesco
[1]
;
Souto Branco, Renato Chaves
[1]
;
Batista, Thiago Martins
[1]
;
Santos-Silva, Junia Carolina
[1]
;
Nakanishi, Vanessa Yumi
[1]
;
Boschero, Antonio Carlos
[1]
;
Ribeiro, Rosane Aparecida
[2]
;
Carneiro, Everardo Magalhaes
[1]
Total Authors: 9
|
| Affiliation: | [1] Univ Campinas UNICAMP, Inst Biol, Lab Pancreas Endocrine & Metab, Obes & Comorbid Res Ctr, 255 Monteiro Lobato St, BR-13083862 Campinas, SP - Brazil
[2] Univ Fed Rio de Janeiro, Campus UFRJ Macae, Macae, RJ - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Amino Acids; v. 50, n. 6, p. 765-774, JUN 2018. |
| Web of Science Citations: | 5 |
| Abstract | |
The sulfur-containing amino acid, taurine (Tau), regulates glucose and lipid homeostasis under normal, pre- and diabetic conditions. Here, we aimed to verify whether Tau supplementation exerts its beneficial effects against obesity, hyperglycemia and alterations in islet functions, in leptin-deficient obese (ob/ob), over a long period of treatment. From weaning until 12 months of age, female ob/ob mice received, or not, 5% Tau in drinking water (obTau group). After this period, a reduction in hypertriglyceridemia and an improvement in glucose tolerance and insulin sensitivity were observed in obTau mice. In addition, the daily metabolic flexibility was restored in obTau mice. In the gastrocnemius muscle of obTau mice, the activation of AMP-activated protein kinase (AMPK) was increased, while total AMPK protein content was reduced. Finally, isolated islets from obTau mice expressed high amounts of pyruvate carboxylase (PC) protein and lower glucose-induced insulin secretion. Taking these evidences together Tau supplementation had long-term positive actions on glucose tolerance and insulin sensitivity, associated with a reduction in glucose-stimulated insulin secretion, in ob/ob mice. The improvement in insulin actions in obTau mice was due, at least in part, to increased activation of AMPK in skeletal muscle, while the increased content of the PC enzyme in pancreatic islets may help to preserve glucose responsiveness in obTau islets, possibly contributing to islet cell survive. (AU) | |
| FAPESP's process: | 14/01717-9 - Investigation of the insulinotropic, insulinomimetic and endothelial actions of taurine in cells/tissues submitted to an in vitro amino acid restriction: an integrated and multifocal approach |
| Grantee: | Everardo Magalhães Carneiro |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 15/12611-0 - Molecular mechanisms involved in pancreatic beta cell disfunction and dead in diabetes mellitus: strategies for the inhibition of these processes and restoration of the insular mass |
| Grantee: | Antonio Carlos Boschiero |
| Support Opportunities: | Research Projects - Thematic Grants |