Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/55808
Type: Artigo de periódico
Title: Chlorella modulates insulin signaling pathway and prevents high-fat diet-induced insulin resistance in mice
Author: Vecina, JF
Oliveira, AG
Araujo, TG
Baggio, SR
Torello, CO
Saad, MJA
Queiroz, MLD
Abstract: Aims: The search for natural agents that minimize obesity-associated disorders is receiving special attention. In this regard, the present study aimed to evaluate the prophylactic effect of Chlorella vulgaris (CV) on body weight, lipid profile, blood glucose and insulin signaling in liver, skeletal muscle and adipose tissue of diet-induced obese mice. Main methods: Balb/C mice were fed either with standard rodent chow diet or high-fat diet (HFD) and received concomitant treatment with CV for 12 consecutive weeks. Triglyceride, free fatty acid, total cholesterol and fractions of cholesterol were measured using commercial assay. Insulin and leptin levels were determined by enzyme-linked immunosorbent assay (ELISA). Insulin and glucose tolerance tests were performed. The expression and phosphorylation of IR beta, IRS-1 and Ala were determined by Western blot analyses. Key findings: Herein we demonstrate for the first time in the literature that prevention by CV of high-fat dietinduced insulin resistance in obese mice, as shown by increased glucose and insulin tolerance, is in part due to the improvement in the insulin signaling pathway at its main target tissues, by increasing the phosphorylation levels of proteins such as IR, IRS-1 and Akt. In parallel, the lower phosphorylation levels of IRS-lse' were observed in obese mice. We also found that CV administration prevents high-fat diet-induced dyslipidemia by reducing triglyceride, cholesterol and free fatty add levels. Significance: We propose that the modulatory effect of CV treatment preventing the deleterious effects induced by high-fat diet is a good indicator for its use as a prophylactic-therapeutic agent against obesity-related complications. (C) 2013 Elsevier Inc. All rights reserved.
Subject: Obesity
Chlorella vulgaris
Insulin resistance
Insulin signaling pathway
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Rights: fechado
Identifier DOI: 10.1016/j.lfs.2013.11.020
Date Issue: 2014
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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