Antioxidant, antihyperglycemic, and antidyslipidemic effects of Brazilian-native fruit extracts in an animal model of insulin resistance.
Redox Rep 2017;
23:41-46. [PMID:
29088999 PMCID:
PMC6748693 DOI:
10.1080/13510002.2017.1375709]
[Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Objective: Insulin resistance (IR) plays an important role in the
development of many diseases, such as diabetes mellitus. Therefore, the aim of
the present study was to evaluate the effects of the extracts from fruits native
to Brazil on metabolic parameters and hepatic oxidative markers in an animal
model of insulin resistance induced by dexamethasone (DEX).
Methods: Wistar rats received water or extracts of Eugenia
uniflora or Psidium cattleianum, once a day for 21
days. For the last 5 days, the rats received an intraperitoneal injection of
saline or DEX.
Results: DEX caused a reduction in body weight gain and relative
pancreatic weight, as well as glucose intolerance, and an increase in serum
glucose and triacylglycerol levels. The extracts were found to prevent
hyperglycemia and hypertriglyceridemia. DEX caused an increase in the levels of
thiobarbituric acid-reactive substances and reactive oxygen species production
in the liver of rats, and both extracts prevented these changes. In addition,
hepatic glutathione peroxidase activity was reduced by DEX. However, total thiol
content and activities of catalase, superoxide dismutase, and
delta-aminolevulinate dehydratase were not altered in any of the tested
groups.
Conclusion: Fruit extracts of E. uniflora and
P. cattleianum exhibited considerable
antihyperglycemic, antidyslipidemic, and antioxidant effects, and may be useful
in the therapeutic management of alterations due to IR.
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