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High-fat diet alters intestinal microbiota and induces endoplasmic reticulum stress via the activation of apoptosis and inflammation in blunt snout bream

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Abstract

The primary organ for absorbing dietary fat is the gut. High dietary lipid intake negatively affects health and absorption by causing fat deposition in the intestine. This research explores the effect of a high-fat diet (HFD) on intestinal microbiota and its connections with endoplasmic reticulum stress and inflammation. 60 fish (average weight: 45.84 ± 0.07 g) were randomly fed a control diet (6% fat) and a high-fat diet (12 % fat) in four replicates for 12 weeks. From the result, hepatosomatic index (HSI), Visceralsomatic index (VSI), abdominal fat (ADF), Intestosomatic index (ISI), mesenteric fat (MFI), Triglycerides (TG), total cholesterol (TC), non-esterified fatty acid (NEFA) content were substantially greater on HFD compared to the control diet. Moreover, fish provided the HFD significantly obtained lower superoxide dismutase (SOD) and glutathione peroxidase (GPX) activities. In contrast, an opposite result was seen in malondialdehyde (MDA) content in comparison to the control. HFD significantly altered intestinal microbiota in blunt snout bream, characterized by an increased abundance of Aeromonas, Plesiomonas proteobacteria, and firmicutes with a reduced abundance of Cetobacterium and ZOR0006. The transcriptional levels of glucose-regulated protein 78 (grp78), inositol requiring enzyme 1 (ire1), spliced X box-binding protein 1 (xbp1), DnaJ heat shock protein family (Hsp40) member B9 (dnajb9), tumor necrosis factor alpha (tnf-α), nuclear factor-kappa B (nf-κb), monocyte chemoattractant protein-1 (mcp-1), and interleukin-6 (il-6) in the intestine were markedly upregulated in fish fed HFD than the control group. Also, the outcome was similar in bax, caspases-3, and caspases-9, ZO-1, Occludin-1, and Occludin-2 expressions. In conclusion, HFD could alter microbiota and facilitate chronic inflammatory signals via activating endoplasmic reticulum stress.

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All data generated or used during the study appear in the submitted article.

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Funding

This research was funded by the Jiangsu Natural Science Foundation for Basic Research (BK 20201325), National Technology System, and Conventional Freshwater Fish Industries of China (grant number CARS-45-14)

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All authors participated in the study’s design, interpretation of the findings and analysis of the data, and review of the manuscript. Kenneth Prudence Abasubong, Guang-zhen Jiang, and Wen-bin Liu provided ideas and schemes for this experiment; Kenneth Prudence Abasubong Hui-Xing Guo and Xi Wang completed the feeding trial; Hui-Xing Guo, and Xi Wang assisted sampling. Kenneth Prudence Abasubong finished data analysis and manuscript writing; Xiang-Fei Li, Dong Yan-zou, Wen-bin Liu, and Hesham Eed. Desouky polished the manuscript

Corresponding author

Correspondence to Wen-bin Liu.

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Ethical approval

Animals were managed, and the experimental manipulations were performed following the guidelines of the Animal Care and Use Committee in China. The Animal Research Ethics Committee has approved the current study at Nanjing Agricultural University, China (permit number: SYXK (Su) 2011-0036). Furthermore, the animals were handled and used based on the international laboratory animal care and use guidelines.

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The authors declare no competing interests.

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Abasubong, K.P., Jiang, GZ., Guo, Hx. et al. High-fat diet alters intestinal microbiota and induces endoplasmic reticulum stress via the activation of apoptosis and inflammation in blunt snout bream. Fish Physiol Biochem 49, 1079–1095 (2023). https://doi.org/10.1007/s10695-023-01240-2

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  • DOI: https://doi.org/10.1007/s10695-023-01240-2

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