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Effec of lactic acid or HCl on the Lactiplantibacillus plantarum gene expression

ABSTRACT: Effec of lactic acid or HCl on the Lactiplantibacillus plantarum gene expression

PROVIDER: PRJNA871236 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21141125_1.fastq.gz	Fastqsanger.gz
	SRR21141125_2.fastq.gz	Fastqsanger.gz
	SRR21141126_1.fastq.gz	Fastqsanger.gz
	SRR21141126_2.fastq.gz	Fastqsanger.gz
	SRR21141127_1.fastq.gz	Fastqsanger.gz

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Effec of lactic acid or HCl on the Lactiplantibacillus plantarum gene expression

Project description:To characterize the effect of lactic acid on the L. plantarum growth and adaptation, we investigated the transcriptome under hydrochloride (HCl) or lactic acid at the early stage of the growth.

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Responses of Staphylococcus aureus exposed to HCl and organic acid stress.

Project description:Staphylococcus aureus is an important food poisoning bacterium. In food preservation, acidification is a well-known method. Permeant weak organic acids, like lactic and acetic acids, are known to be more effective against bacteria than inorganic strong acids (e.g., HCl). Growth experiments and metabolic and transcriptional analyses were used to determine the responses of a food pathogenic S. aureus strain exposed to lactic acid, acetic acid, and HCl at pH 4.5. Lactic and acetic acid stress induced a slower transcriptional response and large variations in growth patterns compared with the responses induced by HCl. In cultures acidified with lactic acid, the pH of the medium gradually increased to 7.5 during growth, while no such increase was observed for bacteria exposed to acetic acid or HCl. Staphylococcus aureus increased the pH in the medium mainly through accumulation of ammonium and the removal of acid groups, resulting in increased production of diacetyl (2,3-butanedione) and pyrazines. The results showed flexible and versatile responses of S. aureus to different types of acid stress. As measured by growth inhibition, permeant organic acid stress introduced severe stress compared with the stress caused by HCl. Cells exposed to lactic acid showed specific mechanisms of action in addition to sharing many of the mechanisms induced by HCl stress. Data is also available from http://bugs.sgul.ac.uk/E-BUGS-87

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Project description:Nowadays, Western diets and lifestyle lead to an increasing occurrence of chronic gut inflammation, that represents an emerging health concern with still a lack of successful therapies. Fermented foods, and their associated Lactic Acid Bacteria, have recently regained popularity for their probiotic potential including the maintenance of gut homeostasis by modulating the immune and inflammatory response. Our study aims to investigate the cross-talk between the food-borne strain Lactiplantibacillus plantarum C9O4 and intestinal epithelial cells in an in vitro inflammation model. Cytokines profile shows the ability of C9O4 to significantly reduce levels of IL-2, IL-5, IL-6, and IFN-γ. Proteomic functional analysis reveals an active host-microbe interaction that highlights an immunoregulatory role of C9O4, able to revert both the detrimental effects of IFN-γ through the JAK/STAT pathway and the apoptosis process in inflamed cells. These results suggest a promising therapeutic role of fermented food-associated microbes for the management of gastrointestinal inflammatory diseases.

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