EPA/DHA and linseed oil have different effects on liver and adipose tissue in rats fed with a high-fat diet.
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2022
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The incidence of cardiovascular diseases and metabolic disorders has increased worldwide. Clinical and exper-
imental research has shown that the consumption of ω-3 FAs can be beneficial to metabolism in several ways, as
they can act on metabolic pathways. Our objective was to evaluate the effect of treatment with linseed oil, a
vegetable oil rich in alpha-linolenic acid, and EPA and DHA in different proportions (3:1 EPA:DHA, and 1:3 EPA:
DHA), on the metabolic disorders induced by a high-fat diet (20 % lipids) in rats for 2 weeks, after 18 weeks of
consumption of a high-fat diet. In 18 weeks, the high-fat diet increased blood glucose, systolic blood pressure,
triglyceride concentration in the liver and adipose tissue, and impaired insulin sensibility without interfering in
the weight of the animals. All treatments were effective in reducing the deposition of hepatic type III collagen,
the proportion of ω-6/ω-3 in the liver and WAT (white adipose tissue), the proportion of area/number of adi-
pocytes, and the gene expression of the ACC, FAS, and CPT1 enzymes. In addition, treatment with EPA and DHA
reduced blood glucose, serum TNF-α concentration, amount of liver fat, degree of microsteatosis and type I
collagen deposition in the liver, deposition of type I and III collagen in TA, gene expression of the transcription
factor SREBP-1c, and increased hepatic binucleation. EPA in major proportion was more effective in reducing the
area of adipocytes, hepatic triglyceride concentration, PPAR-α expression, and WAT fat weight. DHA in a major
proportion reduced the concentration of MCP1 in WAT. LO treatment did not have any isolated effects. We
concluded that EPA and DHA were more effective in treating metabolic damage than treatment with LO, leading
to a more favorable metabolic profile.
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n-3 polyunsaturated fatty acids, Docosahexaenoic acid, Liver metabolism, White adipose tissue
Citação
DIAS, B. V. et al. EPA/DHA and linseed oil have different effects on liver and adipose tissue in rats fed with a high-fat diet. Prostaglandins and Other Lipid Mediators, v. 159, 2022. Disponível em: <https://www.sciencedirect.com/science/article/pii/S1098882322000120>. Acesso em: 11 out. 2022.