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Fusobacterium nucleatum

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https://www.readbyqxmd.com/read/29766652/mucosal-microflora-in-head-and-neck-cancer-patients
#1
A Almståhl, C Finizia, A Carlén, B Fagerberg-Mohlin, T Alstad
OBJECTIVE: To analyse the tongue and buccal microflora prospectively in head and neck cancer patients treated with radiation therapy (RT). METHODS: In 33 dentate patients, microbial samples from the tongue and buccal mucosa were collected pretreatment, during treatment, and 6 months, 1 year and 2 years post-treatment. Microorganisms associated with oral health and oral disorders were analysed using cultivation technique. Oral mucositis was scored at the appointment during treatment...
May 15, 2018: International Journal of Dental Hygiene
https://www.readbyqxmd.com/read/29766378/2-methacryloyloxyethyl-phosphorylcholine-mpc-polymer-suppresses-an-increase-of-oral-bacteria-a-single-blind-crossover-clinical-trial
#2
Natsumi Fujiwara, Hiromichi Yumoto, Koji Miyamoto, Katsuhiko Hirota, Hiromi Nakae, Saya Tanaka, Keiji Murakami, Yasusei Kudo, Kazumi Ozaki, Yoichiro Miyake
OBJECTIVES: The biocompatible 2-methacryloyloxyethyl phosphorylcholine (MPC)-polymers, which mimic a biomembrane, reduce protein adsorption and bacterial adhesion and inhibit cell attachment. The aim of this study is to clarify whether MPC-polymer can suppress the bacterial adherence in oral cavity by a crossover design. We also investigated the number of Fusobacterium nucleatum, which is the key bacterium forming dental plaque, in clinical samples. MATERIALS AND METHODS: This study was a randomized, placebo-controlled, single-blind, crossover study, with two treatment periods separated by a 2-week washout period...
May 16, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29763780/polymorphonuclear-neutrophil-integrity-and-functionality-are-preserved-when-exposed-to-saliva
#3
Patrick Rijkschroeff, Sabrina T G Gunput, Antoon J M Ligtenberg, Enno C I Veerman, Bruno G Loos, Elena A Nicu
OBJECTIVE: Polymorphonuclear neutrophils (PMNs) are the most abundant innate immune cells and are also important effectors in the maintenance of oral health. However, little is known about the effects of saliva on the PMN. We therefore aimed to investigate the effect of saliva on the PMNs' morphology and functioning. DESIGN: Effect of saliva on the membrane integrity of PMNs isolated from blood was evaluated with FACS using Annexin V (apoptosis marker) and propidum iodide (membrane integrity marker)...
May 1, 2018: Archives of Oral Biology
https://www.readbyqxmd.com/read/29761905/stress-related-salivary-proteins-affect-the-production-of-volatile-sulfur-compounds-by-oral-bacteria
#4
Patricia Oliveira de Lima, Bruno Dias Nani, Barbara Almeida, Fernanda Klein Marcondes, Francisco Carlos Groppo, Antonio Bento Alves de Moraes, Michelle Franz-Montan, Karina Cogo-Müller
OBJECTIVE: To determine whether stress-related substances and sex hormones influence the growth and in vitro production of volatile sulfur compounds (VSCs) by Solobacterium moorei and Fusobacterium nucleatum. MATERIALS AND METHODS: Bacteria growth and VSCs production were evaluated in the presence of alpha-amylase, beta-defensin-2, mucin, estradiol, and progesterone. Growth was evaluated by colony counting, and the production of the VSCs hydrogen sulfide (H2 S) and methyl mercaptan (CH3 SH) was measured using the Oral Chroma™ instrument...
May 15, 2018: Oral Diseases
https://www.readbyqxmd.com/read/29760804/association-between-fusobacterium-nucleatum-and-colorectal-cancer-progress-and-future-directions
#5
REVIEW
Sheng Zhang, Sanjun Cai, Yanlei Ma
The initiation and progression of colorectal cancer (CRC) involves genetic and epigenetic alterations influenced by dietary and environmental factors. Increasing evidence has linked the intestinal microbiota and colorectal cancer. More recently, Fusobacterium nucleatum (Fn), an opportunistic commensal anaerobe in the oral cavity, has been associated with CRC. Several research teams have reported an overabundance of Fn in human CRC and have elucidated the possible mechanisms by which Fn is involved in colorectal carcinogenesis in vitro and in mouse models...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29756653/the-effect-of-photodynamic-therapy-on-pathogenic-bacteria-around-peri-implant-sulcus-and-in-the-cavity-between-abutment-and-implant-after-healing-phase-a-prospective-clinical-study
#6
Lin-Yi Zhou, Jun-Yu Shi, Yu Zhu, Shu-Jiao Qian, Hong-Chang Lai, Ying-Xin Gu
OBJECTIVES: To compare levels of pathogens from peri-implant sulcus versus abutment screw cavities after photodynamic therapy. MATERIAL AND METHODS: Twenty patients were included. Photodynamic therapy (PDT) was applied both in sulcus and cavities after sampling following suprastructures loading, and repeated after 2 weeks. Two samples each containing four paper points were collected for each implant at baseline, 2 weeks, 3 months: (i) peri-implant sulcus and (ii) abutment screw cavities...
May 14, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29755677/sex-specific-differences-in-the-occurrence-of-fusobacterium-nucleatum-subspecies-and-fusobacterium-periodonticum-in-the-oral-cavity
#7
Karsten Henne, Hildegard Schilling, Mark Stoneking, Georg Conrads, Hans-Peter Horz
The periodontitis-associated species Fusobacterium nucleatum (FN) has been implicated in several extra-oral diseases, including preterm birth and colorectal cancer. Due to its genetic and phenotypic heterogeneity, FN is classified in four subspecies which may differ in their disease potential. Here we compared the prevalence of FN subspecies and the close relative F. periodonticum (FP) via 16S rRNA gene analysis in saliva from 100 healthy individuals (60 females, and 40 males) from eleven countries spanning five continents...
April 17, 2018: Oncotarget
https://www.readbyqxmd.com/read/29753950/structure-of-the-lps-o-chain-from-fusobacterium-nucleatum-strain-mjr-7757-b
#8
Evgeny Vinogradov, Frank St Michael, Andrew D Cox
Fusobacterium nucleatum is an anaerobic bacterium found in the human mouth where it causes periodontitis. It was also found in colorectal cancer tissues and is linked with pregnancy complications, including pre-term and still births. Cell surface structures of the bacterium could be implicated in pathogenesis. Here we report the following structure of the lipopolysaccharide O-chain of F. nucleatum strain MJR 7757 B:where Lac is (R)-1-carboxyethyl (lactic acid residue); all monosaccharides are in the pyranose form...
April 25, 2018: Carbohydrate Research
https://www.readbyqxmd.com/read/29747062/biochemical-characterization-of-a-recombinant-lactobacillus-acidophilus-strain-expressing-exogenous-foma-protein
#9
Li Ma, Fei Li, Xiangyu Zhang, Xiping Feng
In previous research, to combine the immunogenicity of Fusobacterium nucleatum (F. nucleatum) and the probiotic properties of Lactobacillus acidophilus (L. acidophilus), we constructed a FomA-expressing L. acidophilus strain and assessed its immunogenicity. Our findings indicated that oral administration of the recombinant L. acidophilus strain reduced the risk of periodontal infection by Porphyromonas gingivalis (P. gingivalis) and F. nucleatum. However, because the exogenous FomA is an heterologous protein for the original bacterium, in this study, we assessed whether the biochemical characteristics of the recombinant L...
April 30, 2018: Archives of Oral Biology
https://www.readbyqxmd.com/read/29744209/the-effect-of-metronidazole-plus-amoxicillin-or-metronidazole-plus-penicillin-v-on-periodontal-pathogens-in-an-in-vitro-biofilm-model
#10
Gabriela Dabija-Wolter, Sundus Saad Al-Zubaydi, Marwan Mansoor Ali Mohammed, Vidar Bakken, Anne Isine Bolstad
A combination of metronidazole (MET) and amoxicillin (AMX) is commonly used as adjunct to mechanical therapy of periodontal disease. The use of broad spectrum antibiotics such as AMX may contribute to development of antibiotic resistance. The aim was to evaluate the in vitro effect of replacing AMX with penicillin V (PV) in combination with MET on a biofilm model. A biofilm model consisting of Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, and Fusobacterium nucleatum was developed. The biofilms were exposed to AMX + MET and PV + MET in two different concentrations...
February 2018: Clinical and Experimental Dental Research
https://www.readbyqxmd.com/read/29736391/the-effects-of-antimicrobial-peptide-nal-p-113-on-inhibiting-periodontal-pathogens-and-improving-periodontal-status
#11
Hongyan Wang, Lisi Ai, Yu Zhang, Jyawei Cheng, Huiyuan Yu, Chen Li, Dongmei Zhang, Yaping Pan, Li Lin
Periodontal disease consists of chronic gingival inflammation characterized by both degradation of the periodontal connective tissue and alveolar bone loss. Drug therapy is used as an auxiliary treatment method in severe chronic periodontitis, aggressive periodontitis, and periodontitis-associated systemic disease. Nal-P-113, a modified antimicrobial peptide, specifically replaces the histidine residues of P-113 with the bulky amino acid β -naphthylalanine, and our previous studies have verified that this novel peptide is not toxic to the human body within a certain concentration range...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29729257/association-between-bacteremia-from-specific-microbes-and-subsequent-diagnosis-of-colorectal-cancer
#12
Thomas N Y Kwong, Xiansong Wang, Geicho Nakatsu, Tai Cheong Chow, Timothy Tipoe, Rudin Z W Dai, Kelvin K K Tsoi, Martin C S Wong, Gary Tse, Matthew T V Chan, Francis K L Chan, Siew C Ng, Justin C Y Wu, William K K Wu, Jun Yu, Joseph J Y Sung, Sunny H Wong
BACKGROUND & AIMS: Colorectal cancer (CRC) development has been associated with increased proportions of Bacteroides fragilis and certain Streptococcus, Fusobacterium, and Peptostreptococcus species in the intestinal microbiota. We investigated associations between bacteremia from specific intestinal microbes and occurrence of CRC. METHODS: We performed a retrospective study, collecting data from13,096 adult patients (exposed group) in Hong Kong hospitalized with bacteremia (identified by blood culture test), without a previous diagnosis of cancer, from January 1, 2006 through December 31, 2015...
May 2, 2018: Gastroenterology
https://www.readbyqxmd.com/read/29705028/food-microbiome-and-colorectal-cancer
#13
REVIEW
Lukas Niederreiter, Timon E Adolph, Herbert Tilg
You are what you eat. This adage has been confirmed by many studies demonstrating the high impact of nutrition on risk of cardiovascular diseases, many malignancies and other diseases. Dietary factors are of major relevance in the evolution of colorectal carcinoma. Various aspects are involved in colorectal carcinoma pathogenesis including genetics, lifestyle, age, chronic inflammation and others. It has only recently been recognized that the gut microbiota might reflect an important missing link in the interaction between diet and subsequent colorectal carcinoma development...
April 3, 2018: Digestive and Liver Disease
https://www.readbyqxmd.com/read/29704258/potential-role-of-periodontal-pathogens-in-compromising-epithelial-barrier-function-by-inducing-epithelial-mesenchymal-transition
#14
A A Abdulkareem, R M Shelton, G Landini, P R Cooper, M R Milward
BACKGROUND AND OBJECTIVE: Epithelial-mesenchymal transition (EMT) is a process by which epithelial cells acquire a mesenchymal-like phenotype and this may be induced by exposure to gram-negative bacteria. It has been proposed that EMT is responsible for compromising epithelial barrier function in the pathogenesis of several diseases. However, the possible role of EMT in the pathogenesis of periodontitis has not previously been investigated. The aim of this study therefore was to investigate whether gram-negative, anaerobic periodontal pathogens could trigger EMT in primary oral keratinocytes in vitro...
April 27, 2018: Journal of Periodontal Research
https://www.readbyqxmd.com/read/29702299/diets-that-promote-colon-inflammation-associate-with-risk-of-colorectal-carcinomas-that-contain-fusobacterium-nucleatum
#15
Li Liu, Fred K Tabung, Xuehong Zhang, Jonathan A Nowak, Zhi Rong Qian, Tsuyoshi Hamada, Daniel Nevo, Susan Bullman, Kosuke Mima, Keisuke Kosumi, Annacarolina da Silva, Mingyang Song, Yin Cao, Tyler S Twombly, Yan Shi, Hongli Liu, Mancang Gu, Hideo Koh, Wanwan Li, Chunxia Du, Yang Chen, Chenxi Li, Wenbin Li, Raaj S Mehta, Kana Wu, Molin Wang, Aleksander D Kostic, Marios Giannakis, Wendy S Garrett, Curtis Hutthenhower, Andrew T Chan, Charles S Fuchs, Reiko Nishihara, Shuji Ogino, Edward L Giovannucci
BACKGROUND & AIMS: Specific nutritional components are likely to induce intestinal inflammation, which is characterized by increased levels of interleukin 6 (IL6), C-reactive protein (CRP), and TNF receptor superfamily member 1B (TNFRSF1B) in the circulation and promotes colorectal carcinogenesis. The inflammatory effects of a diet can be estimated based on empirical dietary inflammatory pattern (EDIP) score, calculated based on intake of 18 foods associated with plasma levels of IL6, CRP, and TNFRSF1B...
April 24, 2018: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29702004/human-trna-derived-small-rnas-modulate-host-oral-microbial-interactions
#16
X He, F Li, B Bor, K Koyano, L Cen, X Xiao, W Shi, D T W Wong
Coevolution of the human host and its associated microbiota has led to sophisticated interactions to maintain a delicate homeostasis. Emerging evidence suggests that in addition to small molecules, peptides, and proteins, small regulatory noncoding RNAs (sRNAs) might play an important role in cross-domain interactions. In this study, we revealed the presence of diverse host transfer RNA-derived small RNAs (tsRNAs) among human salivary sRNAs. We selected 2 tsRNAs (tsRNA-000794 and tsRNA-020498) for further study based on their high sequence similarity to specific tRNAs from a group of Gram-negative oral bacteria, including Fusobacterium nucleatum, a key oral commensal and opportunistic pathogen...
April 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29696001/the-pivotal-role-of-dna-repair-in-infection-mediated-inflammation-and-cancer
#17
REVIEW
Ayse Z Sahan, Tapas K Hazra, Soumita Das
Pathogenic and commensal microbes induce various levels of inflammation and metabolic disease in the host. Inflammation caused by infection leads to increased production of reactive oxygen species (ROS) and subsequent oxidative DNA damage. These in turn cause further inflammation and exacerbation of DNA damage, and pose a risk for cancer development. Helicobacter pylori -mediated inflammation has been implicated in gastric cancer in many previously established studies, and Fusobacterium nucleatum presence has been observed with greater intensity in colorectal cancer patients...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29693356/metagenomics-of-microbial-communities-in-gallbladder-bile-from-patients-with-gallbladder-cancer-or-cholelithiasis
#18
Yasuo Tsuchiya, Ernest Loza, Guido Villa-Gomez, Carlos C Trujillo, Sergio Baez, Takao Asai, Toshikazu Ikoma, Kazuo Endoh, Kazutoshi Nakamura
Salmonella typhi and Helicobacter infections have been shown to increase risk of gallbladder cancer (GBC), but findings have been inconsistent. Other bacterial infections may also be associated with GBC. However, information on microbial pathogens in gallbladder bile of GBC patients is scarce. We aimed to investigate the microbial communities in gallbladder bile of patients with GBC and cholelithiasis (CL). Seven GBC patients and 30 CL patients were enrolled in this study. Genomic DNA was extracted from bile and the V3-V4 region of 16S rRNA was amplified...
April 25, 2018: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/29691334/forward-genetic-dissection-of-biofilm-development-by-fusobacterium-nucleatum-novel-functions-of-cell-division-proteins-ftsx-and-envc
#19
Chenggang Wu, Abu Amar Mohamed Al Mamun, Truc Thanh Luong, Bo Hu, Jianhua Gu, Ju Huck Lee, Melissa D'Amore, Asis Das, Hung Ton-That
Fusobacterium nucleatum is a key member of the human oral biofilm. It is also implicated in preterm birth and colorectal cancer. To facilitate basic studies of fusobacterial virulence, we describe here a versatile transposon mutagenesis procedure and a pilot screen for mutants defective in biofilm formation. Out of 10 independent biofilm-defective mutants isolated, the affected genes included the homologs of the Escherichia coli cell division proteins FtsX and EnvC, the electron transport protein RnfA, and four proteins with unknown functions...
April 24, 2018: MBio
https://www.readbyqxmd.com/read/29680846/association-of-time-under-immunosuppression-and-different-immunosuppressive-medication-on-periodontal-parameters-and-selected-bacteria-of-patients-after-solid-organ-transplantation
#20
G Schmalz, L Berisha, H Wendorff, F Widmer, A Marcinkowski, H Teschler, U Sommerwerck, R Haak, O Kollmar, D Ziebolz
BACKGROUND: Aim of this study was to investigate the association of the time under immunosuppression and different immunosuppressive medication on periodontal parameters and selected periodontal pathogenic bacteria of immunosuppressed patients after solid organ transplantation (SOT). MATERIAL AND METHODS: 169 Patients after SOT (lung, liver or kidney) were included and divided into subgroups according their time under (0-1, 1-3, 3-6, 6-10 and >10 years) and form of immunosuppression (Tacrolimus, Cyclosporine, Mycophenolate, Glucocorticoids, Sirolimus and monotherapy vs...
April 22, 2018: Medicina Oral, Patología Oral y Cirugía Bucal
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