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Fusobacterium nucleatum

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https://www.readbyqxmd.com/read/28914596/obesity-and-periodontitis-an-experimental-study-to-evaluate-the-periodontal-and-systemic-effects-of-the-co-morbidity
#1
Leire Virto, Pilar Cano, Vanesa Jiménez-Ortega, Pilar Fernández-Mateos, Jerián González, Ana Isabel Esquifino, Mariano Sanz
BACKGROUND: Obesity and overweight have been associated with periodontitis. This study aims to evaluate the periodontal and systemic effects of this association in a validated experimental model. METHODS: 28 male Wistar rats were randomly divided in four groups: control group (Con) (fed with standard diet); high-fat diet group (HFD) (fed with a diet containing 35.2% fat); control group with induced periodontitis (Con-Perio) and HFD group with induced periodontitis (HFD-Perio)...
September 15, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28912574/distinct-gut-microbiome-patterns-associate-with-consensus-molecular-subtypes-of-colorectal-cancer
#2
Rachel V Purcell, Martina Visnovska, Patrick J Biggs, Sebastian Schmeier, Frank A Frizelle
Colorectal cancer (CRC) is a heterogeneous disease and recent advances in subtype classification have successfully stratified the disease using molecular profiling. The contribution of bacterial species to CRC development is increasingly acknowledged, and here, we sought to analyse CRC microbiomes and relate them to tumour consensus molecular subtypes (CMS), in order to better understand the relationship between bacterial species and the molecular mechanisms associated with CRC subtypes. We classified 34 tumours into CRC subtypes using RNA-sequencing derived gene expression and determined relative abundances of bacterial taxonomic groups using 16S rRNA amplicon metabarcoding...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28898513/characterisation-of-a-sucrose-independent-in-vitro-biofilm-model-of-supragingival-plaque
#3
Kota Tsutsumi, Masato Maruyama, Akira Uchiyama, Ken-Ichiro Shibasaki
OBJECTIVES: Sugar consumption has been decreasing in Japan, suggesting higher rates of sucrose-independent supragingival plaque formation. For developing an in vitro biofilm model of sucrose-independent supragingival plaque, this study aimed to investigate the compositions and functions on contributing to cariogenicity in comparison with sucrose-dependent biofilm. MATERIALS AND METHODS: An in vitro multispecies biofilm containing Actinomyces naeslundii, Streptococcus gordonii, S...
September 12, 2017: Oral Diseases
https://www.readbyqxmd.com/read/28874771/immunization-with-alkyl-hydroperoxide-reductase-subunit-c-reduces-fusobacterium-nucleatum-load-in-the-intestinal-tract
#4
Song-He Guo, Hai-Fang Wang, Zhi-Gang Nian, Yi-Dan Wang, Qiu-Yao Zeng, Ge Zhang
Fusobacterium nucleatum (Fn) is an important tumour-associated bacterium in colorectal cancer (CRC). The antioxidant protein alkyl hydroperoxide reductase subunit C (AhpC) can induce strong antibacterial immune response during various pathogen infections. Our study aimed to evaluate the efficacy of Fn-AhpC as a candidate vaccine. In this work, by western blot analysis, we showed that Fn-AhpC recombinant protein could be recognized specifically by antibodies present in the sera of CRC patients; using the mouse Fn-infection model, we observed that systemic prophylactic immunization with AhpC/alum conferred significant protection against infection in 77...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28874750/amixicile-a-novel-strategy-for-targeting-oral-anaerobic-pathogens
#5
Justin A Hutcherson, Kathryn M Sinclair, Benjamin R Belvin, Qin Gui, Paul S Hoffman, Janina P Lewis
The oral microflora is composed of both health-promoting as well as disease-initiating bacteria. Many of the disease-initiating bacteria are anaerobic and include organisms such as Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum, and Tannerella forsythia. Here we investigated a novel therapeutic, amixicile, that targets pyruvate:ferredoxin oxidoreductase (PFOR), a major metabolic enzyme involved in energy generation through oxidative decarboxylation of pyruvate. PFOR is present in these anaerobic pathogenic bacteria and thus we hypothesized that amixicile would effectively inhibit their growth...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28861286/comparison-of-periodontitis-associated-oral-biofilm-formation-under-dynamic-and-static-conditions
#6
Won Sub Song, Jae-Kwan Lee, Se Hwan Park, Heung-Sik Um, Si Young Lee, Beom-Seok Chang
PURPOSE: The purpose of this study was to compare the characteristics of single- and dual-species in vitro oral biofilms made by static and dynamic methods. METHODS: Hydroxyapatite (HA) disks, 12.7 mm in diameter and 3 mm thick, were coated with processed saliva for 4 hours. The disks were divided into a static method group and a dynamic method group. The disks treated with a static method were cultured in 12-well plates, and the disks in the dynamic method group were cultured in a Center for Disease Control and Prevention (CDC) biofilm reactor for 72 hours...
August 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/28841474/relatively-low-invasive-capacity-of-porphyromonas-gingivalis-strains-into-human-gingival-fibroblasts-in-vitro
#7
Ju Young Jang, Keum Jin Baek, Youngnim Choi, Suk Ji
OBJECTIVE: Bacterial invasion into host cells is a common strategy to escape the host immune system. Gingival fibroblasts (GFs) are the most predominant non-phagocytic cell type in gingival connective tissue. Therefore, invasion into GFs was thought to be the first strategy for the survival of Porphyromonas gingivalis. The present study compared the invasive ability of P. gingivalis into GFs with those of other red-complex and relatively less pathogenic bacterial strains, especially Fusobacterium nucleatum...
August 16, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28833699/impaired-polymorphonuclear-neutrophils-in-the-oral-cavity-of-edentulous-individuals
#8
Patrick Rijkschroeff, Bruno G Loos, Elena A Nicu
Oral health is characterized by functional oral polymorphonuclear neutrophils (oPMNs). Edentulism might be associated with a loss of oPMNs because these cells enter the oral cavity primarily through the gingival crevices. The main aim of this study was to investigate the numbers of oPMNs in rinse samples obtained from edentulous (n = 21) and dentate (n = 20) subjects. A second study aim was to investigate possible differences between oPMNs and peripheral blood polymorphonuclear neutrophils (cPMNs). Apoptosis/necrosis and cell-activation markers (CD11b, CD63 and CD66b) were analyzed using flow cytometry...
August 19, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/28833079/cancer-associated-faecal-microbial-markers-in-colorectal-cancer-detection
#9
Vincy Eklöf, Anna Löfgren-Burström, Carl Zingmark, Sofia Edin, Pär Larsson, Pontus Karling, Oleg Alexeyev, Jörgen Rutegård, Maria L Wikberg, Richard Palmqvist
Colorectal cancer (CRC) is the second most common cause of cancer death in the western world. An effective screening program leading to early detection of disease would severely reduce the mortality of CRC. Alterations in the gut microbiota has been linked to CRC, but the potential of microbial markers for use in CRC screening has been largely unstudied. We used a nested case-control study of 238 study subjects to explore the use of microbial markers for clbA+ bacteria harbouring the pks pathogenicity island, afa-C+ diffusely adherent Escherichia coli harbouring the afa-1 operon, and Fusobacterium nucleatum in stool as potential screening markers for CRC...
August 22, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28826733/periopathogens-differ-in-terms-of-the-susceptibility-to-toluidine-blue-o-mediated-photodynamic-inactivation
#10
Zuzanna Oruba, Przemysław Łabuz, Wojciech Macyk, Maria Chomyszyn Gajewska
BACKGROUND: The main goal of periodontal therapy is to eliminate the infection spreading in periodontium. Antimicrobial photodynamic therapy may be applied in order to eradicate pathogens remaining in periodontal tissues after conventional mechanical debridement, thus, improve the treatment results. The aim of this in vitro study was to evaluate the susceptibility of selected key periopathogens to toluidine blue O-mediated photodynamic inactivation and the influence of photosensitizer's concentration and light dose on the effectiveness of this process...
August 18, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28823057/fusobacterium-nucleatum-as-a-prognostic-marker-of-colorectal-cancer-in-a-japanese-population
#11
Yuko Yamaoka, Yutaka Suehiro, Shinichi Hashimoto, Tomomi Hoshida, Michiyo Fujimoto, Michiya Watanabe, Daiki Imanaga, Kouhei Sakai, Toshihiko Matsumoto, Mitsuaki Nishioka, Taro Takami, Nobuaki Suzuki, Shoichi Hazama, Hiroaki Nagano, Isao Sakaida, Takahiro Yamasaki
BACKGROUND: Accumulating evidence shows an overabundance of Fusobacterium nucleatum in colorectal tumor tissues. However, the correlation between the absolute copy number of F. nucleatum in colorectal cancer tissues and colorectal cancer progression is unclear from previous reports. Therefore, we performed a study to compare the abundance of F. nucleatum in colorectal tissues with clinicopathologic and molecular features of colorectal cancer. METHODS: We collected 100 colorectal cancer tissues and 72 matched normal-appearing mucosal tissues...
August 19, 2017: Journal of Gastroenterology
https://www.readbyqxmd.com/read/28798773/planktonic-growth-of-pseudomonas-aeruginosa-around-a-dual-species-biofilm-supports-the-growth-of-fusobacterium-nucleatum-within-that-biofilm
#12
James C Wang, Joehassin Cordero, Yan Sun, Mayank Aranke, Randall Wolcott, Jane A Colmer-Hamood, Abdul N Hamood
PURPOSE: The goal of this study was to understand the potential interaction between Pseudomonas aeruginosa and Fusobacterium nucleatum within the middle ear. METHODS: We examined the microbiota of ear fluid and tympanostomy tubes (TTs) obtained from patients with posttympanostomy tube otorrhea. We also examined biofilms formed by P. aeruginosa and F. nucleatum, singly or together, under aerobic or anaerobic conditions. RESULTS: While the facultative anaerobe P...
2017: International Journal of Otolaryngology
https://www.readbyqxmd.com/read/28797303/combined-antioxidant-effects-of-neem-extract-bacteria-red-blood-cells-and-lysozyme-possible-relation-to-periodontal-disease
#13
Leali Heyman, Yael Houri-Haddad, Samuel N Heyman, Isaac Ginsburg, Yossi Gleitman, Osnat Feuerstein
BACKGROUND: The common usage of chewing sticks prepared from Neem tree (Azadirachta indica) in India suggests its potential efficacy in periodontal diseases. The objective of this study is to explore the antibacterial effects of Neem leaf extract on the periodontophatic bacteria Porphyromonas gingivalis and Fusobacterium nucleatum, and its antioxidant capacities alone and in combination with bacteria and polycationic peptides that may be at the site of inflammation. METHODS: Neem leaf extract was prepared by ethanol extraction...
August 10, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28793925/perturbed-human-sub-networks-by-fusobacterium-nucleatum-candidate-virulence-proteins
#14
Andreas Zanzoni, Lionel Spinelli, Shérazade Braham, Christine Brun
BACKGROUND: Fusobacterium nucleatum is a gram-negative anaerobic species residing in the oral cavity and implicated in several inflammatory processes in the human body. Although F. nucleatum abundance is increased in inflammatory bowel disease subjects and is prevalent in colorectal cancer patients, the causal role of the bacterium in gastrointestinal disorders and the mechanistic details of host cell functions subversion are not fully understood. RESULTS: We devised a computational strategy to identify putative secreted F...
August 10, 2017: Microbiome
https://www.readbyqxmd.com/read/28776753/assessment-of-the-involvement-of-the-macrophage-migration-inhibitory-factor-glucocorticoid-regulatory-dyad-in-the-expression-of-matrix-metalloproteinase-2-during-periodontitis
#15
Josefine Hirschfeld, Mohammed Howait, Alexandru Movila, Marijo Parčina, Isabelle Bekeredjian-Ding, James Deschner, Søren Jepsen, Toshihisa Kawai
Macrophage migration inhibitory factor (MIF) is a proinflammatory cytokine and counter-regulator of endogenous glucocorticoids (GCs). It is implicated in acute and chronic inflammatory diseases. This study investigated the role of the MIF-GC regulatory dyad in the expression and release of matrix metalloproteinase-2 (MMP-2) during periodontitis, in vivo and in vitro. In a Mif-knockout (KO) mouse model of ligature-induced periodontitis, gingival tissues and blood were collected and analysed for levels of interleukin-6 (IL-6), MIF, MMP-2, and corticosterone...
October 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/28771533/mechanisms-by-which-porphyromonas-gingivalis-evades-innate-immunity
#16
Kaveh Abdi, Tsute Chen, Brian A Klein, Albert K Tai, Jill Coursen, Xiangdong Liu, Jeff Skinner, Saravanan Periasamy, Youngnim Choi, Benedikt M Kessler, Robert J Palmer, Apostolos Gittis, Polly Matzinger, Margaret J Duncan, Nevil J Singh
The oral cavity is home to unique resident microbial communities whose interactions with host immunity are less frequently studied than those of the intestinal microbiome. We examined the stimulatory capacity and the interactions of two oral bacteria, Porphyromonas gingivalis (P. gingivalis) and Fusobacterium nucleatum (F. nucleatum), on Dendritic Cell (DC) activation, comparing them to the effects of the well-studied intestinal microbe Escherichia coli (E. coli). Unlike F. nucleatum and E. coli, P. gingivalis failed to activate DCs, and in fact silenced DC responses induced by F...
2017: PloS One
https://www.readbyqxmd.com/read/28766990/involvement-of-nlrp10-in-il-1%C3%AE-induction-of-oral-epithelial-cells-by-periodontal-pathogens
#17
Seok-Joo Lee, Bong-Kyu Choi
This study investigated the pathogenesis of periodontitis and the role of nucleotide-binding oligomerization domain-like receptor protein 10 (NLRP10). The human oral epithelial cell line HOK-16B was infected with two periodontal pathogens, Tannerella forsythia and Fusobacterium nucleatum, at various MOIs. RT-PCR and immunoblotting demonstrated that infection increased mRNA and protein expression of NLRP10, respectively. The siRNA-mediated NLRP10 knockdown significantly reduced IL-1α expression and secretion...
January 1, 2017: Innate Immunity
https://www.readbyqxmd.com/read/28757933/prevalence-of-periodontal-pathogens-among-italian-patients-with-chronic-periodontitis-a-retrospective-study-on-2992-patients
#18
L Tettamanti, R M Gaudio, F Cura, D Mucchi, N Illuzzi, A Tagliabue
PURPOSE: The aim of the present study was to evaluate the prevalence of some periodontal pathogens in Italian adults with chronic periodontitis. MATERIALS AND METHODS: The sample consisted of 2992 patients with a clinical diagnosis of chronic periodontitis, based on the criteria of the American Academy of Periodontology, sampled in the period 2013-2016: 2108 patients were from Northern, 690 from Central and 194 from Southern Italy. Porphyromonas gengivalis, Treponema denticola, and Tannerella forsythia were investigated in all patients of the present study, while Campylobacter rectus, Fusobacterium nucleatum and Aggregatibacter actinomycetemcomitans only in 2514 (84%) patients...
January 2017: Oral & Implantology
https://www.readbyqxmd.com/read/28755761/do-quaternary-ammonium-monomers-induce-drug-resistance-in-cariogenic-endodontic-and-periodontal-bacterial-species
#19
Suping Wang, Haohao Wang, Biao Ren, Hao Li, Michael D Weir, Xuedong Zhou, Thomas W Oates, Lei Cheng, Hockin H K Xu
OBJECTIVES: Antibacterial monomers were developed to combat oral biofilm acids and caries; however, little is known on whether quaternary ammonium monomers (QAMs) would induce drug resistance in oral bacteria. The objective of this study was to investigate the effects of new antimicrobial monomers dimethylaminohexadecyl methacrylate (DMAHDM) and dimethylaminododecyl methacrylate (DMADDM) on the induction of drug resistance in eight species of cariogenic, endodontic and periodontal bacteria for the first time...
July 26, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28753429/fusobacterium-nucleatum-promotes-chemoresistance-to-colorectal-cancer-by-modulating-autophagy
#20
TaChung Yu, Fangfang Guo, Yanan Yu, Tiantian Sun, Dan Ma, Jixuan Han, Yun Qian, Ilona Kryczek, Danfeng Sun, Nisha Nagarsheth, Yingxuan Chen, Haoyan Chen, Jie Hong, Weiping Zou, Jing-Yuan Fang
Gut microbiota are linked to chronic inflammation and carcinogenesis. Chemotherapy failure is the major cause of recurrence and poor prognosis in colorectal cancer patients. Here, we investigated the contribution of gut microbiota to chemoresistance in patients with colorectal cancer. We found that Fusobacterium (F.) nucleatum was abundant in colorectal cancer tissues in patients with recurrence post chemotherapy, and was associated with patient clinicopathological characterisitcs. Furthermore, our bioinformatic and functional studies demonstrated that F...
July 27, 2017: Cell
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