Salmonella infection accelerates potential maturation of the intestinal epithelium
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE278410 | GEO | 2024/12/17
REPOSITORIES: GEO
Similar Datasets
Project description:Examination of intestinal colonization of enteric pathogen Salmonella typhimurium
2015-08-14 | MSV000079240 | MassIVE
Project description:BACKGROUND & AIMS: The immune system comprises an innate and an adaptive immune response to combat pathogenic agents. The human enteropathogen Salmonella enterica serovar Typhimurium invades the intestinal mucosa and triggers an early innate pro-inflammatory host gene response, which results in diarrheal disease. Several host factors are involved in the acute early response to Salmonella infection. Transcription factors and transcription co-regulators have an especially important function, because they are required for the expression and synthesis of pro-inflammatory cytokines, chemokines and adhesion molecules. A central transcription factor involved in inflammation is NF-κB, which requires the nuclear protein PARP1 as co-factor for the expression of some of its target genes. Here, we investigated the role of PARP1 during Salmonella infection using a mouse model for Salmonella-induced colitis. METHODS: To study enterocolitis by Salmonella Typhimurium, an established mouse model system, which relies on streptomycin-pretreatment prior to Salmonella infection, was employed. Histopathologic signs of inflammation and cecum colonization at various time-points after infection of wild type and PARP1 knockout mice were analyzed. PARP1 expression in the gut mucosa was studied by quantitative RT-PCR, Western blot and immunofluorescence. Gene expression profiles of infected and control infected mice in the wild type or PARP1 knockout background were obtained by whole mouse genome arrays and confirmed by quantitative RT-PCR.
2010-05-01 | GSE19174 | GEO
Project description:Group 3 innate lymphoid cells (ILC3s) produce interleukin (IL)-22 and, together with other cells in the gut, orchestrate to mount productive host immunity against bacterial infection. However, the role of ILC3s in Salmonella enterica serovar Typhimurium (S. Typhimurium) infection, which causes foodborne enteritis in humans, remains elusive. Here, we show that S. Typhimurium exploit ILC3-produced IL-22 to promote its infection. Specifically, S. Typhimurium secrete flagellin through activation of the TLR5-Myd88-IL-23 signaling pathway in antigen presenting cells (APCs) to selectively enhance IL-22 production by ILC3s, but not T cells. Deletion of ILC3s but not T cells in mice led to better control of S. Typhimurium infection. We also show that S. Typhimurium can invade ILC3s directly and cause caspase-1-mediated ILC3 pyroptosis independently of flagellin. Genetic ablation of Casp1 in mice leads to increased ILC3 survival and IL-22 production, and enhanced S. Typhimurium infection. Collectively, our data suggest a key host defense mechanism against S. Typhimurium infection via induction of ILC3 death to limit intracellular bacteria and reduce IL-22 production.
2022-05-23 | GSE201292 | GEO
Project description:Salmonella Typhimurium (S. Typhimurium) is an enteric bacterium capable of invading a wide range of host cell types and adopting different intracellular lifestyles for survival. Host endocytic trafficking and autophagy have been implied to regulate the S. Typhimurium subcellular localization and survival. To reveal alternative host regulators on S. Typhimurium lifestyle, we combined a novel fluorescent reporter, Salmonella Intracellular Analyzer (SINA) with haploid forward genetic screening. This identified transcription factor c-MYC as a negative regulator of S. Typhimurium cytosolic lifestyle via stabilizing the Salmonella-containing vacuole (SCV). We further confirmed that c-MYC downstream regulated LC3 acts to maintain SCV stability and limits S. Typhimurium cytosolic lifestyle. We demonstrated that LC3 is recruited to the SCV prior to the endomembrane damage marker Galectin 3, and it regulates SCV stability independent of the autophagosome adaptor NDP52. The LC3 processing enzymes ATG3 and ATG4 reciprocally act on SCV stability, where the loss of LC3-PE conjugation in the absence of ATG3 limits SCV damages. We further identified the dosage-dependent function of the S. Typhimurium effector SopF in mediating SCV stability by actively avoiding LC3 recruitment to the proximity of the SCV to reduce its catastrophic rupture and host cell death. Altogether, we offer insights on the significance of cellular transcription profile in the determination of S. Typhimurium pathophysiology as well as the underlying host-evasion strategy of S. Typhimurium.
2022-09-25 | GSE161812 | GEO
Project description:BACKGROUND & AIMS: The immune system comprises an innate and an adaptive immune response to combat pathogenic agents. The human enteropathogen Salmonella enterica serovar Typhimurium invades the intestinal mucosa and triggers an early innate pro-inflammatory host gene response, which results in diarrheal disease. Several host factors are involved in the acute early response to Salmonella infection. Transcription factors and transcription co-regulators have an especially important function, because they are required for the expression and synthesis of pro-inflammatory cytokines, chemokines and adhesion molecules. A central transcription factor involved in inflammation is NF-κB, which requires the nuclear protein PARP1 as co-factor for the expression of some of its target genes. Here, we investigated the role of PARP1 during Salmonella infection using a mouse model for Salmonella-induced colitis. METHODS: To study enterocolitis by Salmonella Typhimurium, an established mouse model system, which relies on streptomycin-pretreatment prior to Salmonella infection, was employed. Histopathologic signs of inflammation and cecum colonization at various time-points after infection of wild type and PARP1 knockout mice were analyzed. PARP1 expression in the gut mucosa was studied by quantitative RT-PCR, Western blot and immunofluorescence. Gene expression profiles of infected and control infected mice in the wild type or PARP1 knockout background were obtained by whole mouse genome arrays and confirmed by quantitative RT-PCR. 2 genotypes (wildtype, PARP1 knockout), 2 treatments (Salmonella SB300 infection, Salmonella SB161 control infection), 2 time-points (6h, 10h). 2-3 replicates/condition.
2010-05-27 | E-GEOD-19174 | biostudies-arrayexpress
Project description:Cell to cell communication in bacteria to regulate various cellular processes with respect to their population density is termed quorum sensing and is achieved using signaling molecules called autoinducers. LuxS, which is involved in the synthesis of the autoinducer molecule-2 (AI-2), is conserved in several Gram-positive and Gram-negative bacteria including the enteric pathogen Salmonella Typhimurium. Genes that are regulated by luxS in S. Typhimurium were identified using microarrays and RNA samples from wild type S. Typhimurium and its isogenic luxS mutant, in two growth conditions (presence and absence of glucose), and at two different time points (mid-log and early-stationary phases). Minimal differential gene expression was observed in the presence of glucose. In the absence of both luxS and glucose, a total of 1560 genes were differentially expressed and 1361 genes were identified as luxS/AI-2-regulated at the mid-log phase and 199 genes at the early-stationary phase. Quantitative real-time PCR was performed on selected genes to validate the microarray results. These results suggest that although the expression of the luxS gene in S. Typhimurium is independent of the growth condition, its role in the production of AI-2 depends on the growth condition. It was found that luxS/AI-2 plays a vital role in a variety of processes such as metabolism, virulence gene expression, motility, transcription and translation. Keywords: Salmonella Typhimurium, quorum sensing, luxS mutant, autoinducer-2
2009-10-22 | GSE7558 | GEO
Project description:A first generation Affymetrix GeneChip® Porcine genome array was used to profile the gene expression in porcine mesenteric lymph nodes over a time course of infection with S. Typhimurium, including the acute (8 hours post inoculation (hpi), 24 hpi, 48 hpi) and chronic (21 days post-inoculation (dpi)) stages of infection. Our objectives were to 1) identify and examine the stereotypical gene expression response within host MLN to S. Typhimurium infection, 2) characterize global host responses by revealing the specific features of the host’s innate immunity pathways, and 3) explore if and how S. Typhimurium may escape the host immune response and develop into a carrier state. Our study has attempted to investigate the features of host gene expression profiling during S. Typhimurium infection at the acute and chronic infection stages and to explore the mechanism by which S. Typhimurium can escape from the host immune response and develop a carrier state in the host. In conclusion, by using the Affymetrix porcine GeneChip, 848 differentially expressed genes were identified in porcine MLN during infection and several specific features of host response were revealed by gene cluster and pathway analysis. Our data are the first report to investigate global host responses to S. Typhimurium in porcine MLN, and this new study provides data applicable for studying enteric salmonellosis of pigs, as well as humans. Keywords: time course
2007-06-01 | GSE7313 | GEO
Project description:Salmonella enterica subsp. enterica contains more than 2,600 serovars of which four are of major medical relevance for humans. While the typhoidal serovars (Typhi and Paratyphi A) are human-restricted and cause enteric fever, non-typhoidal Salmonella serovars (Typhimurium and Enteritidis) have a broad host range and predominantly cause gastroenteritis. In this study, we compared the core proteomes of Salmonella Typhi, Paratyphi A, Typhimurium and Enteritidis using contemporary proteomics. Five isolates, covering different geographical origins, and one reference strain per serovar were grown in vitro to the exponential phase. Protein levels of orthologous proteins between serovars were compared and subjected to gene ontology term enrichment and inferred regulatory interactions. Differential expression of the core proteomes of the typhoidal serovars appears mainly related to cell surface components and, for the non-typhoidal serovars, to pathogenicity. Our findings may guide future development of novel diagnostics and vaccines, and understanding of disease progression.
2019-05-13 | PXD011154 | Pride
Project description:Background: Salmonella Typhimurium is a gram-negative enteropathogen that infects millions worldwide; the rapid emergence of antibiotic resistant strains has heightened the urgency of developing effective treatment for this pathogen. Previous studies have demonstrated that the aqueous extract of yerba mate (Ilex paraguariensis) provides effective therapy, in vitro, for the drug-resistant S. Typhimurium DT104. Unfortunately, while some of the chemical constituents that contribute to the extract’s antibacterial activity have been identified, the mechanism of action of the extract is still unknown and of crucial importance to its future potential in combating antibiotic resistant bacteria.</br> Results: Yerba mate extract altered central carbon metabolism in S. Typhimurium, reduced catalase activity by means other than direct inhibition, and did not change membrane integrity (except at the initial 0 time point, where differences were not resolved) despite a significant increase in the production of a cell wall precursor. Additional significant differences were observed in the global metabolic regulators alpha-ketoglutarate and acetylphosphate, the energy-related molecule NAD+, and in an unexpected match to the antibacterial compound yohimbine.</br> Conclusions: This work provides the first insight into the mechanism of action of yerba mate extract on S. Typhimurium by revealing a major impact on central carbon metabolism, catalase activity, and possible metabolic links to interference in energy production and membrane integrity. The putative identification of the antibacterial compound yohimbine and the many unidentified compounds provides additional avenues for future investigations of novel yerba mate compounds capable of traversing or binding to S. Typhimurium’s membrane.
2017-02-16 | MTBLS359 | MetaboLights
Project description:Longitudinal analysis of Salmonella typhimurium mRNA from superspeader mouse cecal content and stool compared to in vitro Salmonella typhimurium mRNA.
2023-03-22 | GSE207764 | GEO