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ABSTRACT: studies of microbial diversity of colitis mice

PROVIDER: PRJNA861670 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR20508424_1.fastq.gz	Fastqsanger.gz
	SRR20508424_2.fastq.gz	Fastqsanger.gz
	SRR20508425_1.fastq.gz	Fastqsanger.gz
	SRR20508425_2.fastq.gz	Fastqsanger.gz
	SRR20508426_1.fastq.gz	Fastqsanger.gz

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The reduction of dextran sulfate sodium-induced colitis severity in mice exposed to cigarette smoke is accompanied by specific gene pathway and microbial shifts.

Project description:Background and Aims: The impact of cigarette smoke on inflammatory bowel disease has been established by a large number of epidemiological, clinical, and preclinical studies. Exposure to cigarette smoke is associated with a higher risk of developing Crohn’s disease but is inversely correlated with the development, disease risks, progression, and relapse rate of ulcerative colitis. Few mechanistic studies have investigated the effect of cigarette smoke on intestinal inflammation and microbial composition. Methods: Three groups of mice were exposed to three different concentrations of cigarette smoke for a total of 4 weeks, including 5 days of dextran sulfate sodium treatment to induce colitis and a 7-day recovery period. A comprehensive and integrated comparative analysis of the global colon transcriptome and microbiome, as well as classical endpoints, was performed. Results: Cigarette smoke exposure significantly decreased the severity induced colitis. Colon transcriptome analysis revealed that cigarette smoke downregulated specific pathways in a concentration-dependent manner, affecting both the inflammatory state and composition of the gut microbiome. Metagenomics analysis demonstrated that cigarette smoke can modulate dextran sulfate sodium-induced dysbiosis of specific bacterial genera, contributing to resolve the inflammation or accelerate recovery. Conclusions: Cigarette smoke alters gut microbial composition and reduces inflammatory responses in a concentration-dependent manner. The present study lays the foundation for investigating potential molecular mechanisms responsible for the attenuation of colitis by cigarette smoke.

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fecal sample

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