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Mus musculus

ABSTRACT: Akkermansia muciniphila in the small intestine improves liver fibrosis and hyperammonemia in a murine liver cirrhosis model

PROVIDER: PRJDB17287 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR523287_1.fastq.gz	Fastqsanger.gz
	DRR523287_2.fastq.gz	Fastqsanger.gz
	DRR523288_1.fastq.gz	Fastqsanger.gz
	DRR523288_2.fastq.gz	Fastqsanger.gz
	DRR523289_1.fastq.gz	Fastqsanger.gz

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Project description:The potential of orally administered colostrum-derived EVs to regulate gut microbiota dysbiosis and prevent non-alcoholic steatohepatitis was evaluated. The results demonstrated that colostrum-derived EVs improved steatosis, fibrosis, and inflammation. Transcriptome analysis showed decreased lipid metabolism, bacterial response, and inflammatory responses in the intestine, and reduced inflammatory and fibrosis-related pathways in the liver. Gut microbiota and metabolite analysis revealed an increased abundance of Akkermansia and elevated cholesterol excretion. Additionally, treatment with colostrum-derived EVs increased the production of tight junction proteins and mucin in the intestine. These findings suggest that increased Akkermansia due to colostrum-derived EVs improves intestinal inflammation and barrier function, preventing endotoxin translocation to the liver and thereby reducing liver inflammation and fibrosis.

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Akkermansia muciniphila outer membrane protein Amuc_0904 promotes goblet cell differentiation

Project description:Akkermansia muciniphila is recognized as a promising probiotic that improves the symptoms of a variety of diseases. However, the role and mechanism of A. muciniphila in regulating intestinal homeostasis remain to be explored. Here, we discovered that A. muciniphila was dramatically increased during colitis recovery, and its colonization greatly increased goblet cells to protect the intestinal barrier in mice. Amuc_0904, a previously uncharacterized A. muciniphila outer membrane protein, was identified to induce goblet cell differentiation.

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Mass spectrometry identification of Akkermansia muciniphila -Caco2 cells interaction proteins

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Project description:16S rRNA sequencing showed that Akkermansia muciniphila (Akk) decreased during the course of HCC tumor development, and daily administration of Akk not only ameliorated liver steatosis and cholesterol biosynthesis but also effectively attenuated the development of NAFLD-induced HCC.

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Impact of gut microbiota on m6A/m epitranscriptomic mRNA modification in different host tissues

Project description:In this study we performed MeRIP-Seq to study N6-methyl adenosine (m6A) and and N6,2′ -O-dimethyladenosine (m6Am) modification of mRNA. We investigated the effect of the microbiota on the transcriptome and epitranscriptomic modifications in murine liver and cecum. We compared m6A/m modification profiles in cecum of conventionally raised (CONV) and germ-free (GF) mice. We additionally included GF mice colonised with the flora of CONV mice for four weeks (ex-GF), for which show that they exhibit similar patterns of the most abundant genera of gut bacteria as CONV mice. We added mice treated with several antibiotics to deplete the gut flora (abx)and vancomycin treated mice in which the genera Akkermansia, Escherichia/Shigella and Lactobacillus were enriched. Furthermore, we included GF mice colonised with the commensal bacterium Akkermansia muciniphila (Am), Lactobacillus plantarum (Lp) and Escherichia coli Nissle (Ec) and analysed their m6A/m modification profiles. In addition, we analysed changes in m6A/m- modified liver RNA for CONV, GF, and Am, Lp and Ec mice.

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Sequencing of total RNA in mouse ileum to evaluate effect of IFNg and Akkermansia muciniphila on host gene expression

Project description:Total RNA from ileum of three groups of mice are sequenced. The three groups are 1. wild type mice. 2. mice with IFNg gene knockout. 3. IFNg gene knockout mice after colonization of Akkermansia muciniphila

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Akkermansia muciniphila Membrane Protein Improves Cognitive Function in Aged Mice by Reducing IL-6 Expression

Project description:We implemented transcriptomic analyses of blood and hippocampus of old mice treated with Akkermansia muciniphila Membrane Protein for 8 weeks.

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Project description:Akkermansia muciniphila improves periodontitis by inhibiting Fusobacterium nucleatum

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Project description:Akkermansia muciniphila improves periodontitis by inhibiting Fusobacterium nucleatum

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Binding of Akkermansia muciniphila to mucin is O-glycan specific

Project description:The intestinal anaerobic bacterium Akkermansia muciniphila is specialized in the degradation of mucins, which are heavily O-glycosylated proteins that constitute the major components of the mucus lining the intestine. Despite that adhesion to mucins is considered critical for the persistence of A. muciniphila in the human intestinal tract, our knowledge of how this intestinal symbiont recognizes and binds to mucins is still limited. Here, we first show that the mucin-binding properties of A. muciniphila are independent of environmental oxygen concentrations and not abolished by pasteurization. We then dissected the mucin-binding properties of pasteurized A. muciniphila by use of a recently developed cell-based mucin array that enables display of the tandem repeats of human mucins with distinct O-glycan patterns and structures. We found that A. muciniphila recognizes the unsialylated LacNAc (Galβ1-4GlcNAc1-R) disaccharide selectively on core2 and core3 O-glycans. This disaccharide epitope is abundantly found on human colonic mucins capped by sialic acids, and we demonstrated that endogenous A. muciniphila neuraminidase activity can uncover the epitope and promote binding. In summary, our study provides insights into the mucin-binding properties important for colonization of a key mucin-foraging bacterium.

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