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Probiotics ameliorate chronic low-grade inflammation and fat accumulation with gut microbiota composition change in diet-induced obese mice models

  • Applied microbial and cell physiology
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Abstract

Recent reports suggest that obesity is caused by dysbiosis of gut microbiota and that it could be prevented or treated through improvement in the composition and diversity of gut microbiota. In this study, high-fat diet (HFD)-induced obese mice were orally administered with Lactobacillus plantarum K50 (K50) isolated from kimchi and Lactobacillus rhamnosus GG (LGG) as a positive control for 12 weeks. Body weight and weights of epididymal, mesenteric, and subcutaneous adipose tissues and the liver were significantly reduced in K50-treated HFD-fed mice compared with HFD-fed mice. The serum triglyceride level was decreased and high-density lipoprotein cholesterol level was increased in K50-treated HFD-fed mice. The gut microbiota analysis showed that the L. plantarum K50 treatment reduced the Firmicutes/Bacteroidetes ratio and improved the gut microbiota composition. In addition, the level of total short-chain fatty acids (SCFAs) in K50-treated HFD-fed mice was higher than that in HFD-fed mice. A remarkable reduction in the fat content of adipose tissue and liver was also observed in K50-treated HFD-fed mice, accompanied by improvements in gene expression related to lipid metabolism, adipogenesis, and SCFA receptors. K50-treated mice had downregulated expression levels of genes and proteins such as TNFα and IL-1β. Our findings confirm that L. plantarum K50 could be a good candidate for ameliorating fat accumulation and low-grade inflammation in metabolic tissues through gut microbiota improvement.

Key points

• Lactobacillus plantarum and L. rhamnosus GG were fed to HFD-induced obese mice.

• L. plantarum K50 had dramatic ameliorating effects on obesity and related diseases.

• These effects may be associated with the restoration of gut microbiota dysbiosis.

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Data availability

The datasets generated during and/or analyzed during the current study are available in NCBI’s SRA and are accessible through accession number SRR12334249 (https://www.ncbi.nlm.nih.gov/sra/SRR12334249) and are included in this published article and its supplementary information file.

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Funding

This research was supported by the Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET) through the Technology Commercialization Support Program, funded by Ministry of Agriculture, Food and Rural Affairs (MAFRA) (Grant Number: 818028-2).

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Contributions

HCJ and JRC designed the experiments and analyzed mRNA, protein, and gut microbiota. HCJ, JRC, BKK, and TSP wrote the manuscript. BKK, ISC, and WSK contributed to the experiments. All authors contributed to manuscript revision, reading, and approval of the submitted version.

Corresponding author

Correspondence to Tae-Sik Park.

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The authors declare that they have no conflict of interest.

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This article does not contain any studies with human participants. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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Joung, H., Chu, J., Kim, BK. et al. Probiotics ameliorate chronic low-grade inflammation and fat accumulation with gut microbiota composition change in diet-induced obese mice models. Appl Microbiol Biotechnol 105, 1203–1213 (2021). https://doi.org/10.1007/s00253-020-11060-6

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  • DOI: https://doi.org/10.1007/s00253-020-11060-6

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