Abstract
Purpose
To investigate the effects of juçara pulp supplementation on energy homeostasis and metabolic complications in diet-induced obese mice.
Methods
Mice received a control (C) or a high-fat diet (H) for 16 weeks and for half the diet was supplemented with 0.5% freeze-dried juçara powder (CJ and HJ groups, respectively). Food intake, body weight, energy expenditure, glucose tolerance, insulin sensitivity, liver steatosis, and uncoupling protein 1 (UCP1) expression in brown adipocytes were analyzed.
Results
Juçara pulp supplementation reduced body weight gain in HJ compared to H group but increased body weight in CJ compared to C group. Energy intake was higher in the CJ group than in C, H, and HJ, but similar between H and HJ groups. Despite similar energy intake, juçara pulp supplementation increased energy expenditure in HJ compared to H group. However, UCP-1 expression was not affected by juçara. Also, H mice exhibited a severe diet-induced glucose intolerance and insulin resistance, all of which were significantly improved in HJ mice. In addition, H group had higher fat content in hepatocytes than HJ, whereas no difference was observed between C and CJ.
Conclusions
Juçara pulp has a great potential to reduce the metabolic complications associated with obesity.
Graphical abstract
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Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- AIN:
-
American Institute of Nutrition
- ANOVA:
-
analysis of variance
- AUC:
-
area under the curve
- BSA:
-
bovine serum albumin
- C:
-
control diet group
- CAT:
-
catalase
- CEDEME:
-
Center for Development of Animal Models for Medicine and Biology
- CEUA:
-
Institutional Ethics Committee on Animal Use
- CJ:
-
control diet group supplemented with juçara 0.5% freeze-dried powder
- H:
-
high-fat diet group
- HE:
-
hematoxylin and eosin
- HJ:
-
high-fat diet group supplemented with juçara 0.5% freeze-dried powder
- IL-6:
-
interleukin 6
- IPEMA:
-
Institute of Permaculture and Ecovillages of the Atlantic
- ipGTT:
-
intraperitoneal glucose tolerance test
- ipITT:
-
intraperitoneal insulin tolerance test
- MCP-1:
-
monocyte chemoattractant protein-1
- NAFLD:
-
non-alcoholic fatty liver disease
- PUFAs:
-
polyunsaturated fatty acids
- SE:
-
standard error of the mean
- TNF-α:
-
tumor necrosis factor alpha
- UCP-1:
-
uncoupling protein 1
- WHO:
-
World Health Organization
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This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES)—Finance Code 001 and by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP, grant 2011/05932-3 and 2017/26075-8).
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MB, CAMO and LPP were responsible for the design of the study; MB and CAMO conducted the study; MB, CAMO, TLM, FPC, IDB, DAR, DE, LLM and VVR helped with experimental procedures, data analysis and discussion.
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All procedures were approved by the Institutional Ethics Committee on Animal Use (CEUA n.1750/11) from Federal University of Sao Paulo.
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Barthichoto, M., Moretto, T.L., de Carvalho, F.P. et al. Juçara (Euterpe edulis Mart.) supplementation reduces body weight gain and protects mice from metabolic complications induced by high-fat diet. Nutrire 46, 6 (2021). https://doi.org/10.1186/s41110-021-00135-7
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DOI: https://doi.org/10.1186/s41110-021-00135-7