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Alleviative effects of total flavones of Glycyrrhiza uralensis Fisch on oxidative stress and lipid metabolism disorder induced by high-fat diet in intestines of Tilapia (Oreochromis niloticus)

Abstract

Total flavones of Glycyrrhiza uralensis Fisch (GTF) are main components of Glycyrrhiza uralensis Fisch, which have anti-oxidation and lipid-lowering effects. However, its protective effects on the intestinal tissue of tilapia (Oreochromis niloticus) are unknown. The aims of the study were to evaluate the protective effects of GTF on the intestinal tissue of tilapia after high-fat diet (HFD) feeding. Tilapia (initial weight 30 ± 1 g) received diets containing four doses of GTF (0.05, 0.1, 0.5, and 1.0 g/kg diet) for 90 days. The intestinal tissues were collected to determine biochemical parameter, gene expression and protein level. The results showed that the HFD reduced antioxidant indexes and increased the fat level, lipid oxidation products in the intestinal tissue relative to the control. Adding GTF to the HFD resulted in an increase of antioxidant indexes, fat level and lipid oxidation products decreased after 60, 90 days. In the HFD group, mRNA level of fatty acid transport protein 1 (FATP1) was increased at 60 day and then decreased at 90 day. The mRNA levels of fatty acid binding protein 1 (FABP1) and sterol regulatory element binding protein 1c (SREBP 1c) were significantly increased at 60 or 90 day after HFD feeding. The mRNA levels of acetate coenzyme A carboxylase (ACCA) peroxisome proliferator-activated receptor γ (PPAR-γ) and PPAR-α were decreased significantly at 30, 60 and/or 90 days after HFD feeding. Western blotting results also showed that nuclear factor (NF)-κβ C-Rel (NF-κβ C-Rel) and mitogen-activated protein kinase 8 (MAPK8) protein expression in intestinal tissue increased after consumption of the HFD. However, adding GTF to the HFD reversed the changes of genes related to fatty acid synthesis and metabolism, and the level of NF-κβ c-Rel and MAPK8 at different degrees. Overall, these results indicated that GTF promoted decomposition and metabolism of fatty acids in intestinal tissue, alleviated oxidative stress damage caused by the HFD, and had certain protective effects on the intestinal tissue of tilapia.

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Data availability

The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

This work was supported by the Central Public-interest Scientific Institution Basal Research Fund, Freshwater Fisheries Research Center, CAFS (2019JBFM10); Jiangsu Provincial Natural Science Foundation of China (NO.BK20201143); and National Natural Science Foundation of China (NO.31702318).

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Authors

Contributions

JD writing—original draft, methodology. LPC formal analysis, resources. RJ validation. ZG investigation. QH data curation. PX supervision, funding acquisition. GY writing—review and editing. YM conceptualization, project administration.

Corresponding authors

Correspondence to Guojun Yin or Yuzhong Ma.

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Conflict of interest

The authors declare that they have no conflicts of interest with the contents of this article.

Ethics approval

This experiments were approved by Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences.

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Du, J., Cao, Lp., Jia, R. et al. Alleviative effects of total flavones of Glycyrrhiza uralensis Fisch on oxidative stress and lipid metabolism disorder induced by high-fat diet in intestines of Tilapia (Oreochromis niloticus). 3 Biotech 11, 348 (2021). https://doi.org/10.1007/s13205-021-02785-w

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  • DOI: https://doi.org/10.1007/s13205-021-02785-w

Keywords

  • Total flavones of Glycyrrhiza uralensis Fisch
  • Tilapia
  • Oxidative stress
  • Biochemical indicators
  • Fatty acid synthesis
  • Metabolism-related genes