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ABSTRACT: AKK blunts IBD

PROVIDER: PRJNA881950 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21622540_1.fastq.gz	Fastqsanger.gz
	SRR21622540_2.fastq.gz	Fastqsanger.gz
	SRR21622541_1.fastq.gz	Fastqsanger.gz
	SRR21622541_2.fastq.gz	Fastqsanger.gz
	SRR21622542_1.fastq.gz	Fastqsanger.gz

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Akkermansia muciniphila reduces lipid absorption through activating AMPK in the jejunum

Project description:Akkermansia muciniphila (Akk) associated with multiple metabolic diseases and administration of Akk can improve the metabolic disorders. However, little is known about the effect of Akk on jejunal epithelial cells which absorb lipid and interact with oral administrated Akk. We oral administrated Akk to mice and measured the lipid absorption and gene expression in small intestinal epithelial cells. The long-term effect of Akk treatment reduced lipid deposits in the liver and adipocytes with improved the glucose metabolism. This is particularly caused by reduced lipid absorption in jejunal epithelia. Akk feeding reduced the expression of those genes that regulate synthesis and cell cycles, characters of the host cell responding to energy deficiency. In fact, we detected increased AMPK-alpha phosphorylation levels in Akk-treated jejunal epithelial cells both in vivo and in vitro. Furthermore, activating AMPK inhibits lipids absorption in jejunum. Thus, we conclude that oral administration of Akk activates the AMPK pathway and represses the lipid absorption in jejunal epithelial cells, which contributes to the metabolic benefits of oral Akk administration.

2025-01-25 | GSE254234 | GEO

RNA sequencing analysis of doxorubicin-treated mice after administration with Akkermansia muciniphila

Project description:Doxorubicin (DOX) is considered as the major culprit in chemotherapy-induced cardiotoxicity, which limits its clinical application. Akkermansia muciniphila (AKK) shows a beneficial role as a probiotic in the treatment of metabolic syndrome. However, the changes of AKK during DIC and whether it mediates cardioprotective effects remains unclear. Cardiac transcriptomics certified by in vitro experiments demonstrated that AKK administration effectively improved mitochondrial function and alleviated DIC, by activation of PPARα/PGC1α signaling pathway. These findings provide a therapeutic strategy for DIC through supplementation with AKK.

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AKK bacteria affects colitis by regulating ferroptosis signaling pathway

Project description:To investigate whether Akkermansia muciniphila (AKK) bacteria affects colitis by regulating the ferroptosis signaling pathway, an mouse model of colitis was constructed, and the mice were administered with AKK and the ferroptosis agonist Erastin. HE staining and transmission electron microscopy were used to observe the pathological and microstructural changes of mouse colon tissues. The number of goblet cells was examined using alcian blue staining. The expression levels of oxidative stress-related indicators and ferroptosis-related proteins were detected by ELISA, western blot and immunohistochemisty analyses. Transcriptome and non-targeted metabolome sequencing were carried out to screen for differentially expressed genes and metabolites. Immunofluorescence double staining was used to detect the co-localization of cell adhesion-related indicators.16S microbiota sequencing was performed on mouse feces. Erastin caused damage to colon tissues, decreased the expression of ZO-1 and E-Cadherin, and increased the expression of oxidative stress and ferroptosis-related indicators. The species-abundance was increased after AKK treatment, while it was decreased after treatment with AKK bacteria+Erastin. AKK alleviated inflammatory cell infiltration, reduced organelle damage, and decreased the number of goblet cells in mice with colitis. MDA, ROS, and Fe2+ levels in colitis tissues were increased, but they were decreased after AKK bacteria treatment. The expression of GPX4 and SLC7A11 was decreased, while ACSL4 was increased. After intervention with AKK bacteria, the trend of changes in the above indicators was reversed, and 19 differential pathways were enriched. In conclusion, AKK bacteria can treat colitis in mice, and its mechanism may be related to regulating the ferroptosis signaling pathway.

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Intestinal Akkermansia muciniphila complements the therapeutic efficacy of PD1 therapy by reshaping the immunosuppressive microenvironment in nonalcoholic fatty liver disease (NAFLD)-induced hepatocellular carcinoma [16S]

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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Project description:The mechanism underlying negative regulatory role of Akk in hepatic steatosis was examined using bulk RNA sequencing.

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