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

ABSTRACT: Transcriptome profiling revealed that KIF26B was associated with cell-cell junction and response to growth factor stimulation, which are important for CRC cell aggressiveness. And gene set enrichment analysis suggested that Hippo signaling pathway was significantly enriched in KIF26B-regulated gene signatures

ORGANISM(S): Homo sapiens

PROVIDER: GSE150309 | GEO | 2022/02/07

REPOSITORIES: GEO

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Fusobacterium nucleatum Reducing METTL3-mediated m6A Modification Contributes to Colorectal Cancer Aggressiveness

Project description:This SuperSeries is composed of the SubSeries listed below.

2022-02-08 | GSE150310 | GEO

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.

2022-02-07 | GSE150308 | GEO

Fusobacterium nucleatum Reducing METTL3-mediated m6A Modification Contributes to Colorectal Cancer Aggressiveness

Project description:Fusobacterium nucleatum Reducing METTL3-mediated m6A Modification Contributes to Colorectal Cancer Aggressiveness

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

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

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

Project description:Fusobacterium nucleatum Reducing METTL3-mediated m6A Modification Contributes to Colorectal Cancer Aggressiveness [RNA-Seq]

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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 semidefined 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 versus 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 reverse transcription-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.

| S-EPMC2794088 | biostudies-other

Fusobacterium nucleatum-positive colorectal cancer.

Project description:Colorectal cancer (CRC) is an important threat to human health and the fourth leading cause of mortality worldwide. Accumulating evidence indicates that the composition of the intestinal flora is associated with the occurrence of CRC. Fusobacterium nucleatum (Fn), one of the highly enriched bacteria in CRC tissues, invades the mucosa with adhesion factors and virulence proteins, interacts with the host immune system and promotes the occurrence and development of CRC and chemoresistance. Fn infection is prevalent in human colorectal carcinoma, although the infection rate varies in different regions. Fn may be used as a prognostic indicator of CRC. It is important to understand the multi-pathway carcinogenic mechanisms associated with CRC in order to develop novel antibacterial drugs against Fn. The current review summarizes the role of Fn and relevant research concerning CRC published in recent years, focusing on Fn infection in CRC, pathogenesis of Fn, Fn-positive CRC treatment, screening and prevention strategies against Fn-positive CRC.

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Fusobacterium nucleatum - symbiont, opportunist and oncobacterium.

Project description:Fusobacterium nucleatum has long been found to cause opportunistic infections and has recently been implicated in colorectal cancer; however, it is a common member of the oral microbiota and can have a symbiotic relationship with its hosts. To address this dissonance, we explore the diversity and niches of fusobacteria and reconsider historic fusobacterial taxonomy in the context of current technology. We also undertake a critical reappraisal of fusobacteria with a focus on F. nucleatum as a mutualist, infectious agent and oncogenic microorganism. In this Review, we delve into recent insights and future directions for fusobacterial research, including the current genetic toolkit, our evolving understanding of its mechanistic role in promoting colorectal cancer and the challenges of developing diagnostics and therapeutics for F. nucleatum.

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Comparative Genome Analysis of Fusobacterium nucleatum.

Project description:Fusobacterium nucleatum is considered to be a key oral bacterium in recruiting periodontal pathogens into subgingival dental plaque. Currently F. nucleatum can be subdivided into five subspecies. Our previous genome analysis of F. nucleatum W1481 (referred to hereafter as W1481), isolated from an 8-mm periodontal pocket in a patient with chronic periodontitis, suggested the possibility of a new subspecies. To further investigate the biology and relationships of this possible subspecies with other known subspecies, we performed comparative analysis between W1481 and 35 genome sequences represented by the five known Fusobacterium subspecies. Our analyses suggest that W1481 is most likely a new F. nucleatum subspecies, supported by evidence from phylogenetic analyses and maximal unique match indices (MUMi). Interestingly, we found a horizontally transferred W1481-specific genomic island harboring the tripartite ATP-independent (TRAP)-like transporter genes, suggesting this bacterium might have a high-affinity transport system for the C4-dicarboxylates malate, succinate, and fumarate. Moreover, we found virulence genes in the W1481 genome that may provide a strong defense mechanism which might enable it to colonize and survive within the host by evading immune surveillance. This comparative study provides better understanding of F. nucleatum and the basis for future functional work on this important pathogen.

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Genome sequence of Fusobacterium nucleatum subspecies polymorphum - a genetically tractable fusobacterium.

Project description:Fusobacterium nucleatum is a prominent member of the oral microbiota and is a common cause of human infection. F. nucleatum includes five subspecies: polymorphum, nucleatum, vincentii, fusiforme, and animalis. F. nucleatum subsp. polymorphum ATCC 10953 has been well characterized phenotypically and, in contrast to previously sequenced strains, is amenable to gene transfer. We sequenced and annotated the 2,429,698 bp genome of F. nucleatum subsp. polymorphum ATCC 10953. Plasmid pFN3 from the strain was also sequenced and analyzed. When compared to the other two available fusobacterial genomes (F. nucleatum subsp. nucleatum, and F. nucleatum subsp. vincentii) 627 open reading frames unique to F. nucleatum subsp. polymorphum ATCC 10953 were identified. A large percentage of these mapped within one of 28 regions or islands containing five or more genes. Seventeen percent of the clustered proteins that demonstrated similarity were most similar to proteins from the clostridia, with others being most similar to proteins from other gram-positive organisms such as Bacillus and Streptococcus. A ten kilobase region homologous to the Salmonella typhimurium propanediol utilization locus was identified, as was a prophage and integrated conjugal plasmid. The genome contains five composite ribozyme/transposons, similar to the CdISt IStrons described in Clostridium difficile. IStrons are not present in the other fusobacterial genomes. These findings indicate that F. nucleatum subsp. polymorphum is proficient at horizontal gene transfer and that exchange with the Firmicutes, particularly the Clostridia, is common.

| S-EPMC1924603 | biostudies-literature

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