Oxidized fish oils increased lipid deposition via oxidative stress-mediated mitochondrial dysfunction and the CREB1-Bcl2-Beclin1 pathway in the liver tissues and hepatocytes of yellow catfish: Food Chemistry

D.-G. Zhang, T. Zhao, C. Hogstrand, H.-M. Ye, X.-J. Xu, Z. Luo

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

At present, the harmful effects and relevant mechanism of oxidized fish oils on fish and fish cells remain unknown. Our study found that oxidized fish oils increased lipogenesis, and reduced lipolysis, activated oxidative stress by decreasing glutathione peroxidase (GPX) activity, increasing malondialdhyde (MDA) content and damaging mitochondrial structure, and activated autophagy in the liver of yellow catfish; oxidized eicosapentaenoic acid (oxEPA) induced oxidative stress in yellow catfish hepatocytes. Oxidative stress, mitochondrial dysfunction and lipophagy mediated oxEPA induced-variations in lipid metabolism. Our further investigation indicated that oxEPA-activated lipophagy was via inhibiting the DNA binding capacity of the cAMP-response element binding protein (CREB)-1 to the region of Bcl-2 promoter, which in turn suppressed the binding activity of Bcl-2 to Beclin1 and promoted autophagosome formation. For the first time, our study elucidated the mechanisms of oxidized fish oils-induced lipid deposition by the oxidative stress, mitochondrial dysfunction and CREB1-Bcl-2-Beclin1 pathway in fish. © 2021 Elsevier Ltd
Original languageEnglish
JournalFood Chem.
Volume360
DOIs
Publication statusPublished - 2021

Keywords

  • Lipid metabolism
  • Molecular mechanism
  • Oxidative stress
  • Oxidized fish oils
  • Signaling pathway
  • Cell death
  • Deposition
  • Fish
  • Mitochondria
  • Oxidation
  • Unsaturated fatty acids
  • Eicosapentaenoic acid
  • Fish oil
  • Hepatocytes
  • Lipid deposition
  • Lipid metabolisms
  • Liver tissue
  • Mitochondrial dysfunction
  • Oxidized fish oil
  • Signalling pathways
  • Metabolism
  • 3 methyladenine
  • acetylcysteine
  • beclin 1
  • chloroquine
  • cyclic AMP responsive element binding protein
  • fish oil
  • glutathione peroxidase
  • icosapentaenoic acid
  • malonaldehyde
  • protein bcl 2
  • rapamycin
  • reactive oxygen metabolite
  • lipid
  • animal cell
  • animal experiment
  • animal model
  • animal tissue
  • Article
  • autophagosome
  • autophagy (cellular)
  • binding affinity
  • controlled study
  • disorders of mitochondrial functions
  • DNA binding
  • enzyme activity
  • female
  • lipid metabolism
  • lipid storage
  • lipogenesis
  • lipolysis
  • lipophagocytosis
  • liver cell
  • liver tissue
  • male
  • nonalcoholic fatty liver
  • nonhuman
  • oxidative stress
  • Pelteobagrus fulvidraco
  • promoter region
  • protein content
  • signal transduction
  • animal
  • autophagy
  • catfish
  • cell culture
  • drug effect
  • liver
  • metabolism
  • mitochondrion
  • oxidation reduction reaction
  • Animals
  • Autophagy
  • Beclin-1
  • Catfishes
  • Cells, Cultured
  • Cyclic AMP Response Element-Binding Protein
  • Fish Oils
  • Lipid Metabolism
  • Lipids
  • Liver
  • Oxidation-Reduction
  • Oxidative Stress
  • Proto-Oncogene Proteins c-bcl-2
  • Signal Transduction

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