Fusobacterium nucleatum subsp. nucleatum ATCC 25586
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Project description:Oral bacterium contributing to tooth decay.
| PRJNA1419 | ENA
Project description:Oral bacterium contributing to tooth decay and gingivitis
| PRJNA17261 | ENA
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| S-EPMC3457189 | biostudies-literature
Project description:Normal oral and gastrointestinal bacterium
| PRJNA12332 | ENA
Project description:Interspecies coaggregation promotes transcriptional changes of oral bacteria, contributing to the development of structurally balanced biofilms as well as oral diseases such as periodontitis. Streptococcus gordonii (S. gordonii) is an early colonizer of the oral cavity, and Fusobacterium nucleatum (F. nucleatum) may act as a bridge adhering to both early and late oral colonizers. These two species were commonly detected in healthy and periodontitis-diseased oral sites and could interact with immune cells such as macrophages. However, little research explored how intergeneric coaggregation affected transcriptional changes in S. gordonii and F. nucleatum subsp. polymorphum and how these gene changes might affect both species’ pathogenicity. The present study investigated transcriptional changes of both species in response to dual-species physical association using dual RNA-seq. Results indicated that after 30-min dual-species coaggregation, 148 genes were significantly up-regulated, and 124 genes were significantly down-regulated in S. gordonii. A total of 154 genes were significantly down-regulated, and 10 genes were significantly up-regulated in F. nucleatum subsp. polymorphum. A majority of up-regulated S. gordonii genes were involved in the biosynthesis and export of cell-wall proteins and the pathway of carbohydrate metabolism, and a group of down-regulated S. gordonii genes were associated with fatty acid biosynthesis and peptidoglycan biosynthesis. The transcriptome profiles indicated that the interspecies coaggregation led to a reduced level of DNA repair and lipopolysaccharides virulence in F. nucleatum subsp. polymorphum. The present study revealed that dual-species coaggregation induced a wide array of gene changes in S. gordonii and F. nucleatum subsp. polymorphum, enhancing S. gordonii’s adherence ability and attenuating F. nucleatum subsp. polymorphum's ability to produce LPS.
2021-05-20 | GSE164282 | GEO
Project description:High throughput RNA sequencing For RNA sequencing, F. nucleatum was incubated with 1 mM or 5 mM metformin for 7 hours, when the bacterium were under logarithmic phase. Total RNA of F. nucleatum was stabilized with RNA protect Bacteria Reagent (QIAGEN, Germany) and extracted using a QIAGEN RNeasy kit (QIAGEN, Germany) following the manufacturer’s instructions.
2024-04-01 | GSE171561 | GEO
Project description:Fusobacterium nucleatum, long known as a constituent of the oral microflora, has recently garnered much attention for its newly discovered prevalence in colorectal and breast cancer tissue. The growing interest in this emerging cancer-associated bacterium sharply contrasts with a paucity of knowledge about its basic gene expression features and physiological responses. Post-transcriptional networks are also unknown, for fusobacteria lack all established small RNA-associated proteins. Here, we present high-resolution global RNA maps for two clinically relevant F. nucleatum subspecies for different growth conditions, and use these to uncover fundamental aspects of fusobacterial gene expression architecture and a previously unknown suite of noncoding RNAs. Developing a new vector for functional analysis of fusobacterial genes, we identify a conserved oxygen-induced small RNA as a post-transcriptional repressor of major porin FomA. Our findings provide a crucial step towards delineating the regulatory networks enabling F. nucleatum to colonize different compartments of the human body.
2021-05-03 | GSE161360 | GEO
Project description: Not available
| S-EPMC6386562 | biostudies-literature
Project description: Not available
| S-EPMC134920 | biostudies-literature
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.
2009-10-15 | E-GEOD-18554 | biostudies-arrayexpress