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Bifidobacterium bifidum Ameliorates DSS-Induced Colitis in Mice by Regulating AHR/NRF2/NLRP3 Inflammasome Pathways through Indole-3-lactic Acid Production.

Abstract
In this study, the effectors and mechanisms of Bifidobacterium bifidum FL-276.1 and B. bifidum FL-228.1 in alleviating dextran sulfate sodium (DSS)-induced colitis were investigated. Both FL-276.1 and FL-228.1 significantly alleviated DSS-induced colitis, whether they were supplemented from the beginning of the experiment (whole course intervention) or after the DSS induction started (partial intervention). Aryl hydrocarbon receptor (AHR) and the nuclear factor erythroid 2-related factor 2 (NRF2) pathways were activated in mice colons, while the NLR family pyrin domain containing 3 (NLRP3) was downregulated under the whole course intervention modes. Indole-3-lactic acid, an AHR ligand produced by FL-276.1 and FL-228.1, could regulate the AHR/NRF2/NLRP3 pathway in Caco-2 monolayers, thus upregulating the tight junction proteins and protecting the integrity of the epithelial barrier. These results are conducive to promoting clinical trials and product development of probiotics for alleviating colitis.
AuthorsQingyu Cui, Zhe Zhang, Xiaoying Tian, Xi Liang, Youyou Lu, Yixin Shi, Malina Kuerman, Rui Wang, Yu Zhou, Pimin Gong, Kai Lin, Huaxi Yi, Jiadong Li, Tongjie Liu, Lanwei Zhang
JournalJournal of agricultural and food chemistry (J Agric Food Chem) Vol. 71 Issue 4 Pg. 1970-1981 (Feb 01 2023) ISSN: 1520-5118 [Electronic] United States
PMID36633059 (Publication Type: Journal Article)
Chemical References
  • Dextran Sulfate
  • indole-3-lactic acid
  • Inflammasomes
  • NF-E2-Related Factor 2
  • NLR Family, Pyrin Domain-Containing 3 Protein
  • Nlrp3 protein, mouse
  • Receptors, Aryl Hydrocarbon
Topics
  • Animals
  • Humans
  • Mice
  • Bifidobacterium bifidum
  • Caco-2 Cells
  • Colitis (chemically induced, drug therapy, metabolism)
  • Dextran Sulfate
  • Disease Models, Animal
  • Inflammasomes (metabolism)
  • Mice, Inbred C57BL
  • NF-E2-Related Factor 2 (genetics, metabolism)
  • NLR Family, Pyrin Domain-Containing 3 Protein (genetics, metabolism)
  • Receptors, Aryl Hydrocarbon (genetics, metabolism)

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