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Fusobacterium nucleatum promotes colorectal cancer cells adhesion to endothelial cells and facilitates extravasation and metastasis by inducing ALPK1/NF-κB/ICAM1 axis

ABSTRACT: Fusobacterium nucleatum-treated HCT116 cells reported an increased adhesion to endothelial cells compared with PBS control. To understand the underlying mechanisms of Fusobacterium nucleatum-induced intercellular adhesion ability of CRC cells, we performed RNA-sequencing in HCT116 cells with or without Fusobacterium nucleatum treatment with three independent biological replicates.

ORGANISM(S): Homo sapiens

PROVIDER: GSE171611 | GEO | 2022/03/09

REPOSITORIES: GEO

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Fusobacterium nucleatum Reducing METTL3-mediated m6A Modification Contributes to Colorectal Cancer Aggressiveness [RIP-Seq]

Project description:To investigate the role of Fusobacterium nucleatum-mediated m6A modification, we performed m6A-sequencing to map the m6A modification in control or Fusobacterium nucleatum-treated HCT116 cells.

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Effect of Fusobacterium nucleatum on human HUVEC cells

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Comparison of Fusobacterium Nucleatum stimulated and unstimulated neutrophils

Project description:Neutrophils are known to be stimulated by different periodontal bacteria to produce reactive oxygen species and cytokines. It is inportant to investigate the gene changes made by bacteria of importance, of which, for periodontal disease, fusobaterium nucleatum is one. we used microarrays to investigate gene experssion changes in peripheral blood neutrophils werwhich e stimulated with or with out Fusobacterium Nucleatum (10953). Neutrophils from periodonatlly healthy individuals (n=4) were isolated and stimulated for 3hrs with or without fusobaterium nucleatum (10953). RNA was then extracted from these and pooled before hybridization on Affymetrix microarrays

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Fusobacterium nucleatum promotes colorectal cancer metastasis through miR-1322/CCL20 axis and M2 polarization

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The adhesion RadD enhances Fusobacterium nucleatum tumor colonization and colorectal carinogenesis

Project description:Fusobacterium nucleatum can bind to host cells and potentiate intestinal tumorigenesis. Here, we used a genome-wide screen to identify an adhesin, RadD, which facilitates the attachment of F. nucleatum to CRC cells in vitro. RadD directly binds to CD147, a receptor overexpressed on CRC cell surfaces, which initiated a PI3K-AKT-NF-kB-MMP9 cascade, subsequently enhanceing tumorigenesis in mice. Clinical specimen analysis showed that elevated radD levels in CRC tissues correlated positively with activated oncogenic signaling and poor patient outcomes. Finally, blockade of the interaction between RadD and CD147 in mice effectively impaired F. nucleatum attachment and attenuated F. nucleatum-induced oncogenic response. Together, our study provides insights into an oncogenic mechanism driven by F. nucleatum RadD and suggests taht the RadD-CD147 interaction could be a potential therapeutic target for CRC.

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The effect of blood on Fusobacterium nucleatum

Project description:Fusobacterium nucleatum is a Gram-negative oral bacterial species associated with periodontal disease progression. As periodontal disease progresses, it is known F. nucleatum coaggregated with blood is frequently detected in the gingival crevice. However, it is largely unknown whether these interactions between F. nucleatum and blood induce a particular genetic response. We tested the cultures of F. nucleatum ATCC 25586 with or without blood in a semi-defined growth medium by microarray analysis and found 14 genes that were affected after only about 4hr. of adhered blood. Then, we selected 7 genes that changed significantly and tested these genes via real-time RT-PCR to confirm the validity of the microarray results. As a result, one amino sugar-binding protein on the membrane of F. nucleatum was especially expressed high via both microarray and real-time RT-PCR. Based upon these data, it appears that the protein on the F. nucleatum membrane binds and transfers the amino sugar only under blood conditions. This study aims to determine the effect of blood on the gene expression profiling of F. nucreatum. The study contains 2 separate experiments that both measure the cultures without or with blood. The samples with blood contain 9% and 33% blood.

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Fusobacterium nucleatum

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| PRJNA831657 | ENA

Characterization of the autoaggregation response of Fusobacterium nucleatum

Project description:Fusobacterium nucleatum is a Gram negative oral bacterial species associated with periodontal disease progression. This species is perhaps best known for its ability to adhere to a vast array of other bacteria and eukaryotic cells. Numerous studies of F. nucleatum have examined various coaggregation partners and inhibitors, but it is largely unknown whether these interactions induce a particular genetic response. We tested coaggregation between F. nucleatum ATCC strain 25586 and various species of Streptococcus in the presence of a semi-defined growth medium containing saliva. We found that this condition could support efficient coaggregation, but surprisingly also stimulated a similar degree of autoaggregation. We further characterized the autoaggregation response, since few reports have examined this in F. nucleatum. After screening several common coaggregation inhibitors, we identified L-lysine as a competitive inhibitor of autoaggregation. We performed a microarray analysis of the planktonic vs. autoaggregated cells and found nearly 100 genes that were affected after only about 60 min. of aggregation. We tested a subset of these genes via real-time RT-PCR and confirmed the validity of the microarray results. Some of these genes were also found to be inducible in cell pellets created by centrifugation. Based upon these data, it appears that autoaggregation activates a genetic program that may be utilized for growth in a high cell density environment, such as the oral biofilm. The study aims to determine the effect of autoaggregation upon the transcriptome. The study contains 2 separate experiments that both measure dispersed (i.e. non-aggregated) vs. aggregated cells and each experiment was performed in duplicate. Samples with no added components other than medium were dispersed, samples containing 25% saliva were aggregated, and samples containing 25% saliva + 50mM L-lysine remained dispersed.

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