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Periodontal Bacteria Proteomics in Thrombi from Ischemic Stroke Patients.

OBEJECTIVE: To characterize periodontal bacterial proteins in ischemic stroke thrombi and explore differences according to stroke etiology. … ns from five periodontal bacteria: Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Fusobacterium nucleatum, Tannerella forsythia, and Treponema denticola. Protein expression was compared across thrombus etiologies, and differentially expressed proteins were further analyzed in silico to explore their functions and interactions. RESULTS: A total of 136 b …

Prevention of HNSCC by chewing gum delivery of enzymes/antimicrobials to reduce carcinogenic acetaldehyde produced by pathogenic microbes.

Acetaldehyde, a WHO Group 1 human carcinogen, produced by oral microbes, plays a critical role at the onset of head and neck squamous cell carcinoma (HNSCC). Candida albicans isolated from different HNSCC patient saliva samples produced similar levels of acetaldehyde; the production level increased in a dose-dependent manner, with the highest level observed at 100 mM glucose or ethanol. Streptococci produced acetaldehyde in ethanol-free media, but the level increased up to 500-1,000 mM alcohol, whereas Fusobacterium nucleatum and Porphyromonas gingivalis showed ethanol-induced acetaldehyde pro…

Detection Blind Spots in Microbial Culture, tNGS, and mNGS: Anaerobic Bacterial Infections in the Lung-A Retrospective Analysis of Two Cases.

Aspiration pneumonia is often associated with specific obligate anaerobic bacteria, particularly oral commensals, as causative agents; howev … gens and colonizing bacteria. Specifically, Case 1 revealed the presence of Bacteroides timidum and Fusobacterium nucleatum. Case 2 identified Prevotella oralis, Streptococcus australis, and Actinomyces caries. The administration of targeted anti-anaerobic therapy (metronidazole, ornidazole) subsequently resulted in significant improvement in clinical symptoms and radiog …

От Мауса к разуму: Нервозность роли орального микробиома в орофациальной боли и нейродегенерации.

Человеческая пероральная полость содержит разнообразный и динамичный микробиом, состоящий более чем из двух микробиомов. 700 Микробные виды, которые играют решающую роль в поддержании перорального и системного здоровья. Оральный дисбиоз, определяемый как нарушение этого микробного баланса, все чаще проявляется не только в периодонных заболеваниях, но и в патогенезе ородовой боли и нейродегенеративных заболеваниях. Были предложены ключевые патогены, такие, как Porphyromonas gingivalis, Treponema denticola и Fusobacterium нуклеатум, для высвобождения вирулентных факторов, включая липополисакчари

Совпадение в аннотации оригинала
The human oral cavity hosts a diverse and dynamic microbiome comprising more than 700 microbial species, which plays a crucial role in maint … urodegenerative diseases. Key pathogens, such as Porphyromonas gingivalis, Treponema denticola, and Fusobacterium nucleatum, have been proposed to release virulence factors, including lipopolysaccharides and gingipains, which may activate immune pathways and nociceptors, thereby driving peripheral sensitization and neuroinflammation. These organisms have also been sugges …

The relationship between pathogenic bacteria and different stages of colorectal cancer.

Colorectal cancer (CRC) involves uncontrolled cell growth in the colon and rectum. This study aims to explore the prevalence of key pathogen … 3), 2 (P = 0.004), and 3 (P = 0.0002) compared to the control group. Additionally, the frequency of Fusobacterium nucleatum in stage 3 CRC patients was significantly higher than in the control group (P = 0.004) and stage 1 patients (P = 0.01). Furthermore, Streptococcus gallolyticus showed similar significant differences in stage 3 patients (P = 0.004). Bioinformatics an …

Periodontitis increases the risk of gastrointestinal dysfunction: an update on the plausible pathogenic molecular mechanisms.

Periodontitis is an immuno-inflammatory disease of the soft tissues surrounding the teeth. Periodontitis is linked to many communicable and … omonas. gingivalis, Klebsiella, Helicobacter. Pylori, Streptococcus, Veillonella, Parvimonas micra, Fusobacterium nucleatum, Peptostreptococcus, Haemophilus, Aggregatibacter actinomycetomcommitans and Streptococcus mutans can withstand the unfavorable acidic, survive in the gut and result in gut dysbiosis. Gut dysbiosis increases gut inflammation, and induce dysplastic c …

In situ-activated photothermal nanoplatform for on-demand NO gas delivery and enhanced colorectal cancer treatment.

The naturally evolved and intestinal pathogenic Fusobacterium nucleatum (Fn)-induced drug resistance profoundly impaired the efficacy of chemotherapy against colorectal cancer (CRC). Alternative treatment modalities against Fn-associated CRC are desperately needed. Herein, we engineer an in situ-activated anti-tumor and antibacterial nanoplatform (Cu2O/BNN6@MSN-Dex) to allow photoacoustic (PA) imaging-guided photothermal and NO gas combinatorial therapy for enhanced Fn-associated CRC treatment. The nanoplatform is constructed by loading cuprous oxide (Cu2O) and nitric oxide (NO) donor (BNN6) i…

The gut microbiota can orchestrate the signaling pathways in colorectal cancer.

Current evidence suggests that bacteria contribute to the development of certain cancers, such as colorectal cancer (CRC), partly by stimula … . Not surprisingly, some of these studies investigated known CRC drivers, such as Escherichia coli, Fusobacterium nucleatum, and Bacteroides fragilis. Interestingly, some metabolites produced by bacterial species typically considered pathogenic, e.g., Vibrio cholera, displayed anti-tumorigenic activities, emphasizing the caution needed when classifying healthy and unheal …

Transitions in oral and gut microbiome of HPV+ oropharyngeal squamous cell carcinoma following definitive chemoradiotherapy (ROMA LA-OPSCC study).

BACKGROUND: Oral and gut microbiomes have emerged as potential biomarkers in cancer. We characterised the oral and gut microbiomes in a pros … geal swabs and stool taxonomic composition varied significantly by stage, with increased oral RA of Fusobacterium nucleatum observed in stage III disease (p < 0.05). CRT significantly reduced the species richness and increased the RA of gut-associated taxa in oropharyngeal swabs (p < 0.05), while it had no effect in stool samples. These findings remained significant when …

Feasibility of investigating the association between bacterial pathogens and oral leukoplakia in low and middle income countries: A population-based pilot study in India.

BACKGROUND: Certain oral bacterial pathogens may play a role in oral carcinogenesis. We assessed the feasibility of conducting a population-based study in India to examine the distributions and levels of Porphyromonas gingivalis, Fusobacterium nucleatum and Prevotella intermedia in relation to oral leukoplakia (a potentially malignant disorder) and other participant characteristics. METHODS: This exploratory case-control study was nested within a large urban Indian cohort and the data included 22 men and women with oral leukoplakia (cases) and 69 leukoplakia-free controls. Each participant pr…

Actinotignum schaalii: Relation to Concomitants and Connection to Patients' Conditions in Polymicrobial Biofilms of Urinary Tract Catheters and Urines.

Actinotignum schaalii is an emerging, opportunistic pathogen and its connection to non-infectious diseases and conditions, such as prostate … i negative and between-group diversity was higher than intra-group. Propionimicrobium lymphophilum, Fusobacterium nucleatum, Veillonella sp., Morganella sp., and Aerococcus sp. were significantly more often present in A. schaalii-positive samples; thus, we suggest these species are A. schaalii's concomitants, while Enterobacter and Staphylococcaceae were more often ident …

Recovery of gut microbiota of healthy adults following antibiotic exposure.

To minimize the impact of antibiotics, gut microorganisms harbour and exchange antibiotics resistance genes, collectively called their resistome. Using shotgun sequencing-based metagenomics, we analysed the partial eradication and subsequent regrowth of the gut microbiota in 12 healthy men over a 6-month period following a 4-day intervention with a cocktail of 3 last-resort antibiotics: meropenem, gentamicin and vancomycin. Initial changes included blooms of enterobacteria and other pathobionts, such as Enterococcus faecalis and Fusobacterium nucleatum, and the depletion of Bifidobacterium spe…

Antimicrobial effectiveness of cetylpyridinium chloride and zinc chloride-containing mouthrinses on bacteria of halitosis and peri-implant disease.

PURPOSE: To clarify the antimicrobial efficacy of zinc chloride (ZnCl2) and cetylpyridinium chloride (CPC) by testing their impact on the growth of seven bacterial strains known to be involved in the pathophysiology of both peri-implant disease and halitosis-Staphylococcus aureus, Streptococcus mutans, Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum, Treponema denticola, and Tannerella forsythia. MATERIALS AND METHODS: A time-response growth curve was obtained. Commercial mouthrinses with CPC, ZnCl2, or both were added to the media in a final concentration of 0.25% CP…

Anaerobic and microaerophilic pathogens in the biofilm formation on voice prostheses: A pilot study.

OBJECTIVES/HYPOTHESIS: Voice rehabilitation with voice prostheses is a standard therapy in laryngectomized patients. Biofilm formation on th … 80% of the voice prostheses, at least one and up to 10 of the tested bacteria could be identified. Fusobacterium nucleatum was the pathogen most often present (73%). Other frequently occurring pathogens were Treponema denticola (40%), Tannerella forsythia (33%), and Eikenella corrodens (33%). There was no correlation between the number of identified bacteria and the ind …

Microbial shifts during dental biofilm re-development in the absence of oral hygiene in periodontal health and disease.

AIM: To monitor microbial shifts during dental biofilm re-development. MATERIALS AND METHODS: Supra- and subgingival plaque samples were ta … d reached or exceeded the baseline values after day 2. Supragingival counts of Veillonella parvula, Fusobacterium nucleatum ss vincentii and Neisseria mucosa increased from 2 to 7 days. Subgingival counts were greater for Actinomyces, green and orange complex species. Significant differences between groups in supragingival counts occurred for 17 of 41 species at entry, 0 …

Efficacy of a low-concentration chlorhexidine mouth rinse in non-compliant periodontitis patients attending a supportive periodontal care programme: a randomized clinical trial.

OBJECTIVE: To assess the clinical and microbiological efficacy of a 0.05% chlorhexidine and 0.05% cetyl-pyridinium chloride mouth rinse in s … Microbiological variables demonstrated inter-group significant reductions in subgingival counts of Fusobacterium nucleatum and Prevotella intermedia and a decrease of the total bacterial counts in saliva. CONCLUSIONS: The tested mouth rinse demonstrated efficacy in reducing plaque and gingivitis, as well as in decreasing the microbial load in saliva and gingival sulcus …

Comparison between polymerase chain reaction-based and checkerboard DNA hybridization techniques for microbial assessment of subgingival plaque samples.

AIM: To compare polymerase chain reaction (PCR) with subsequent reverse hybridization (micro-IDent test) and checkerboard DNA-DNA hybridizat … omparisons. The highest rank correlations of 0.58, 0.49 and 0.46 were seen for Treponema denticola, Fusobacterium nucleatum and Eubacterium nodatum, respectively (p<0.0001). Both tests could distinguish samples from healthy and periodontitis subjects. CONCLUSION: Detection patterns of 10/13 test species in subgingival plaque samples from periodontitis and healthy subjec …

Production of antagonistic substance by Eikenella corrodens isolated from the oral cavity of human beings with and without periodontal disease.

AIMS: Antagonistic abilities may confer ecological advantages for micro-organisms in competitive ecosystems. However, reports regarding this … tum ATCC25559, Peptostreptococcus anaerobius ATCC27337, Actinobacillus actinomycetemcomitans FDCY4, Fusobacterium nucleatum ATCC10953, Streptococcus sanguinis ATCC10557, Streptococcus uberis ATCC9927, Streptococcus mutans IM/UFRJ, Staphylococcus aureus ATCC33591 and Candida albicans ATCC18804. All the strains showed antagonism against at least one of the indicator strain …

Improved diagnosis specificity in bone and joint infections using molecular techniques.

OBJECTIVES: The microbiological diagnosis of osteoarticular infections currently relies on microbiological cultures, to specifically target … a, Escherichia coli, Pseudomonas aeruginosa, and fastidious bacteria like Neisseria gonorrhoeae and Fusobacterium nucleatum. The overall PCR sensitivity was 73.3%: 53.8% for prosthetic-joint infections and 88.2% for infections without prostheses. The overall PCR specificity was 95.2%, whereas culture specificity was only 85.7%. CONCLUSIONS: The instrument was simple to …

Oral microbiome contribution in colorectal carcinogenesis: polymicrobial interactions and virulence determinants.

The contribution of the microbiome to sporadic colorectal cancer (CRC) has traditionally been interpreted through the detection of individua … ate the structural organization and succession patterns of oral biofilms. Within these communities, Fusobacterium nucleatum serves as the primary bridging organism, facilitating interspecies adhesion and spatial organization. Parvimonas micra, Porphyromonas gingivalis, and Candida albicans display potential bridging structural and functional properties, with their roles …