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https://www.readbyqxmd.com/read/29453162/the-effect-of-cadmium-exposure-on-diversity-of-intestinal-microbial-community-of-rana-chensinensis-tadpoles
#1
Danyang Mu, Jinhua Meng, Xiaoxue Bo, Minyao Wu, Hui Xiao, Hongyuan Wang
Cadmium is a natural and widely distributed toxicant, and can be commonly found in environment. Intestinal microbiota plays a very important role in maintaining its host's health. The effects of cadmium on the intestinal microbiota composition and stability of amphibians are little known. We exposed Rana chensinensis (R. chensinensis) embryos to different concentrations of cadmium (0, 112 and 448 μg Cd L -1 ) until they reached Gosner stage 38, and analyzed their microbial communities using 16S rRNA amplicon sequencing...
February 13, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29445368/beneficial-oral-biofilms-as-smart-bioactive-interfaces
#2
Beatrice Gutt, Qun Ren, Irmgard Hauser-Gerspach, Piotr Kardas, Stefan Stübinger, Monika Astasov-Frauenhoffer, Tuomas Waltimo
Periodontitis is a very common health problem caused by formation of pathogenic bacterial biofilm that triggers inflammation resulting in either reversible gingivitis or irreversible periodontal hard and soft tissue damages, leading to loss of teeth when left untreated. Commensal bacteria play an important role in oral health in many aspects. Mainly by colonizing oral tissues, they (i) contribute to maturation of immune response, and (ii) foreclose attachment of pathobiont and, therefore, prevent from infection...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29442188/damage-regulated-autophagy-modulator-1-in-oral-inflammation-and-infection
#3
Svenja Memmert, A V B Nogueira, A Damanaki, M Nokhbehsaim, S Eick, T Divnic-Resnik, A Spahr, B Rath-Deschner, A Till, W Götz, J A Cirelli, A Jäger, J Deschner
OBJECTIVES: Damage-regulated autophagy modulator (DRAM) 1 is a p53 target gene with possible involvement in oral inflammation and infection. This study sought to examine the presence and regulation of DRAM1 in periodontal diseases. MATERIAL AND METHODS: In vitro, human periodontal ligament fibroblasts were exposed to interleukin (IL)-1β and Fusobacterium nucleatum for up to 2 days. The DRAM1 synthesis and its regulation were analyzed by real-time PCR, immunocytochemistry, and ELISA...
February 13, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29439598/diabetes-activates-periodontal-ligament-fibroblasts-via-nf-%C3%AE%C2%BAb-in-vivo
#4
J Zheng, S Chen, M L Albiero, G H A Vieira, J Wang, J Q Feng, D T Graves
Diabetes mellitus increases periodontitis and pathogenicity of the oral microbiome. To further understand mechanisms through which diabetes affects periodontitis, we examined its impact on periodontal ligament fibroblasts in vivo and in vitro. Periodontitis was induced by inoculation of Porphyromonas gingivalis and Fusobacterium nucleatum in normoglycemic and diabetic mice. Diabetes, induced by multiple low-dose injections of streptozotocin increased osteoclast numbers and recruitment of neutrophils to the periodontal ligament, which could be accounted for by increased CXC motif chemokine 2 (CXCL2) and receptor activator of nuclear factor kappa B ligand (RANKL) expression by these cells...
February 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29436449/lesson-of-the-month-1-lemierre-s-syndrome-a-reminder-of-the-forgotten-disease
#5
Vivek Vijay, Zozik Fattah
Lemierre's syndrome is a condition characterised by suppurative thrombophlebitis of the internal jugular (IJ) vein following a recent oropharyngeal infection, with resulting septicaemia and metastatic lesions. It is strongly associated with Fusobacterium necrophorum, a Gram-negative bacilli. Key to early diagnosis is awareness of the classical history and course of this illness, and therefore to ask about a history of recent oropharyngeal infections when a young patient presents with fever and rigors. Diagnosis can be confirmed by showing thrombophlebitis of the IJ vein, culturing F necrophorum from normally sterile sites or demonstrating metastatic lesions in this clinical setting...
February 2018: Clinical Medicine: Journal of the Royal College of Physicians of London
https://www.readbyqxmd.com/read/29435792/anti-oral-common-pathogenic-bacterial-active-acetylenic-acids-from-thesium-chinense-turcz
#6
Chang Liu, Xiao-Tian Li, Rong-Rong Cheng, Zhu-Zhen Han, Li Yang, Zhong-Chen Song, Zheng-Tao Wang
Discovery of agents for oral infectious diseases is always encouraged in natural products chemistry. A bioassay-guided isolation led to the isolation of two new acetylenic acids (1, 2) along with seven known ones (3-9) from the ethanol extract of Thesium chinense Turcz, a commonly used oral anti-bacterial and anti-inflammatory herb. Their structures were elucidated on the basis of spectroscopic and chemical evidence. Exocarpic acid (3) demonstrated the most promising activity against three tested oral pathogenic bacterial strains, Porphyromonas gingivalis, Fusobacterium nucleatum, and Streptococcus mutans, with minimum inhibitory concentration values of 0...
February 12, 2018: Journal of Natural Medicines
https://www.readbyqxmd.com/read/29435321/the-gut-microbiota-bile-acids-and-their-correlation-in-primary-sclerosing-cholangitis-associated-with-inflammatory-bowel-disease
#7
J Torres, C Palmela, H Brito, X Bao, H Ruiqi, P Moura-Santos, J Pereira da Silva, A Oliveira, C Vieira, K Perez, S H Itzkowitz, J F Colombel, L Humbert, D Rainteau, M Cravo, C M Rodrigues, J Hu
Background: Patients with primary sclerosing cholangitis associated with inflammatory bowel disease (PSC-IBD) have a very high risk of developing colorectal neoplasia. Alterations in the gut microbiota and/or gut bile acids could account for the increase in this risk. However, no studies have yet investigated the net result of cholestasis and a potentially altered bile acid pool interacting with a dysbiotic gut flora in the inflamed colon of PSC-IBD. Aim: The aim of this study was to compare the gut microbiota and stool bile acid profiles, as well as and their correlation in patients with PSC-IBD and inflammatory bowel disease alone...
February 2018: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/29432368/fecal-microbiota-differences-according-to-the-risk-of-advanced-colorectal-neoplasms
#8
Hyo-Joon Yang, Min-Jung Kwon, Yoosoo Chang, Seul-Ki Song, Kwang-Sung Ahn, Han-Na Kim, Yeojun Yun, Hyung-Lae Kim, Dong Il Park
GOALS AND BACKGROUND: This study aimed to compare differences in the fecal microbiota according to the risk of advanced colorectal neoplasia (ACN) based on a risk-score model in a large Korean cohort. STUDY: Stool samples were collected from 1122 health screening recipients: 404 enrolled in the average risk (AR) group, 514 in the moderate risk (MR) group, and 204 in the high risk (HR) group, in accordance with their risk of ACN. The fecal microbiota was characterized using pyrosequencing of the V3-V4 region of the 16S rRNA genes...
February 9, 2018: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/29430094/effect-of-ultrasonic-activation-of-photosensitizer-dye-temoporfin-foscan-on-antimicrobial-photodynamic-therapy-an-ex-vivo-study
#9
Aleem Mohammad, Srinidhi V Ballullaya, Jayaprakash Thumu, Sohani Maroli, Pushpa Shankarappa
Aim: The aim of this study is to evaluate the effectiveness of ultrasonic activation of photosensitizer (PS) drug Foscan in the elimination of endodontic pathogen from root canal system. Materials and Methods: The minimal bactericidal concentration of "Foscan" was determined using disc diffusion and broth dilution method. Forty-eight extracted single-rooted premolars with periapical pathology were used for the study. After access opening, the first microbial sample was taken...
November 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29423216/dietary-proline-supplementation-alters-colonic-luminal-microbiota-and-bacterial-metabolite-composition-between-days-45-and-70-of-pregnancy-in-huanjiang-mini-pigs
#10
Yujiao Ji, Qiuping Guo, Yulong Yin, Francois Blachier, Xiangfeng Kong
Background: Pregnancy is associated with important changes in gut microbiota composition. Dietary factors may affect the diversity, composition, and metabolic activity of the intestinal microbiota. Among amino acids, proline is known to play important roles in protein metabolism and structure, cell differentiation, conceptus growth and development, and gut microbiota re-equilibration in case of dysbiosis. Results: Dietary supplementation with 1% proline decreased (P < 0...
2018: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/29420132/tumour-associated-and-non-tumour-associated-microbiota-addendum
#11
Burkhardt Flemer, Maeve Herlihy, Micheal O'Riordain, Fergus Shanahan, Paul W O'Toole
In a recent study1 we reported that tissue-associated microbial Co-abundance Groups (CAGs) were differentially associated with CRC. Two of the CAGs, which we named Pathogen CAG and Prevotella CAG, were correlated with a gene expression signature indicative of a TH17 response. A TH17 response has been associated with decreased survival in patients with CRC2, and members of the Pathogen CAG such as Fusobacterium nucleatum, Escherichia coli and Bacteroides fragilis have been repeatedly reported to be associated with CRC-development...
February 8, 2018: Gut Microbes
https://www.readbyqxmd.com/read/29409815/fusobacterium-nucleatum-and-adverse-pregnancy-outcomes-a-review-of-epidemiological-and-mechanistic-evidence
#12
REVIEW
Emilie L Vander Haar, Jeewon So, Cynthia Gyamfi-Bannerman, Yiping W Han
Fusobacterium nucleatum is a Gram-negative anaerobic oral commensal commonly found in periodontal disease. F. nucleatum has been associated with multiple systemic diseases, including oral, gastro-intestinal, rheumatologic, and vascular pathology. As pregnancy is associated with an increased risk of periodontal disease, there has also been significant research into the effects of periodontal disease on adverse pregnancy outcomes. This article reviews the epidemiological and mechanistic evidence of the association and role of F...
January 31, 2018: Anaerobe
https://www.readbyqxmd.com/read/29408599/characterization-of-fusobacterium-necrophorum-subsp-necrophorum-outer-membrane-proteins
#13
S Menon, D K Pillai, S Narayanan
Liver abscesses are of major economic importance to the cattle industry. These are mainly associated with the presence of Fusobacterium necrophorum, a non-spore forming and Gram-negative anaerobe. There are two main subspecies, F. necrophorum subspecies necrophorum and subsp. fundiliforme, and they differ molecularly, morphologically, biochemically and in virulence. Previous studies have shown that the outer membrane proteins (OMP) of F. necrophorum subsp. necrophorum are important for its successful binding to immobilized bovine adrenal gland capillary endothelial (EJG) cells...
February 1, 2018: Anaerobe
https://www.readbyqxmd.com/read/29408025/shift-of-uterine-microbiota-associated-with-antibiotic-treatment-and-cure-of-metritis-in-dairy-cows
#14
Soo Jin Jeon, Fabio S Lima, Achilles Vieira-Neto, Vinicius S Machado, Svetlana F Lima, Rodrigo C Bicalho, Jose Eduardo P Santos, Klibs N Galvão
Broad-spectrum antibiotics such as ceftiofur and ampicillin are recommended for the treatment of metritis in dairy cows. Nonetheless, little is known about the impacts of antibiotics on the uterine microbiota. Here, we evaluated the shift in uterine microbiota after treating metritic cows with ceftiofur or ampicillin, and also gained insight into the uterine microbiota associated with cure of metritis. Uterine swabs from ceftiofur-treated, ampicillin-treated, and untreated metritic Holstein cows were collected on the day of metritis diagnosis (D1) and on D6 and then used for genomic DNA extraction and sequencing of the V4 hypervariable region of the 16S rRNA gene on the Illumina MiSeq platform...
February 2018: Veterinary Microbiology
https://www.readbyqxmd.com/read/29406559/lemierres-syndrom-%C3%A2-en-p%C3%A3-minnelse-om-%C3%A2-den-gl%C3%A3-mda-sjukdomen%C3%A2-god-kunskap-under-hela-v%C3%A3-rdkedjan-viktigt-f%C3%A3-r-att-i-tid-v%C3%A3-cka-misstanke
#15
Jan Hedenmark, Karin Holm, Fredrik Moberger, Erik Torell
The purpose of this case report and discussion is to heighten the awareness of Lemierres syndrome (postanginal sepsis).  Affected patients present in various fields of medicine and an increased incidence of "the forgotten disease" may be expected. Fusobacterium necrophorum is the most common pathogen. The clinical course includes a primary head or neck infection with thrombosis of the internal jugular vein with subsequent septic pulmonary embolization. The syndrome bears considerable morbidity and even mortality...
February 2, 2018: Läkartidningen
https://www.readbyqxmd.com/read/29396061/anaerobic-bacterial-meningitis-in-adults
#16
Jun-Jun Lee, Chia-Yi Lien, Chun-Chih Chien, Chi-Ren Huang, Nai-Wen Tsai, Chiung-Chih Chang, Cheng-Hsien Lu, Wen-Neng Chang
Anaerobic infection is a very uncommon condition in adult bacterial meningitis (ABM), and its clinical characteristics have yet to be clarified. We enrolled 540 patients with culture-proven bacterial meningitis during a study period of 30 years (1986-2015), of whom 13 (2.4%) had anaerobic infections. These 13 patients were eight men and five women, aged 22-77 years. Among them, 53.8% (7/13) had a postneurosurgical state as the preceding event, and 79.6% (10/13) had underlying medical conditions including diabetes mellitus, malignancy, liver cirrhosis, cerebral infarct and alcoholism...
January 22, 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29392531/salivary-microbial-profiles-in-5-year-old-children-with-oral-clefts-a-comparative-study
#17
A L Sundell, C Ullbro, G Dahlén, A Marcusson, S Twetman
AIM: To compare the salivary microbial profile in children with oral clefts to matched non-cleft controls in a cross-sectional study. METHODS: The cleft group consisted of 80 children aged 5 years and 144 age-matched non-cleft children were recruited as a control group. Stimulated whole saliva samples were collected and analysed with checkerboard DNA-DNA hybridisation using 12 pre-determined bacterial probes. Background data on caries, oral hygiene, dietary habits and fluoride exposure were collected from clinical examinations and questionnaires...
February 1, 2018: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29389826/complicated-fusobacterium-sinusitis-a-case-report
#18
Saloni P Sheth, Paul Ilkanich, Blaise Congeni
Fusobacterium infections and Lemierre Syndrome are traditionally associated with pharyngitis. We report three cases of Fusobacterium sinusitis that resulted in Pott Puffy Tumor. One of these cases also had Lemierre Syndrome. We encourage expansion of the clinical spectrum of Lemierre Syndrome to include complicated Fusobacterium sinusitis.
January 31, 2018: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29373772/-periodontal-microbiota-and-microorganisms-isolated-from-heart-valves-in-patients-undergoing-valve-replacement-surgery-in-a-clinic-in-cali-colombia
#19
Sandra Moreno, Beatriz Parra, Javier E Botero, Freddy Moreno, Daniel Vásquez, Hugo Fernández, Sandra Alba, Sara Gallego, Gilberto Castillo, Adolfo Contreras
INTRODUCTION: Periodontitis is an infectious disease that affects the support tissue of the teeth and it is associated with different systemic diseases, including cardiovascular disease. Microbiological studies facilitate the detection of microorganisms from subgingival and cardiovascular samples. OBJECTIVE: To describe the cultivable periodontal microbiota and the presence of microorganisms in heart valves from patients undergoing valve replacement surgery in a clinic in Cali...
December 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29371629/alterations-of-oral-microbiota-distinguish-children-with-autism-spectrum-disorders-from-healthy-controls
#20
Yanan Qiao, Mingtao Wu, Yanhuizhi Feng, Zhichong Zhou, Lei Chen, Fengshan Chen
Altered gut microbiota is associated with autism spectrum disorders (ASD), a group of complex, fast growing but difficult-to-diagnose neurodevelopmental disorders worldwide. However, the role of the oral microbiota in ASD remains unexplored. Via high-throughput sequencing of 111 oral samples in 32 children with ASD and 27 healthy controls, we demonstrated that the salivary and dental microbiota of ASD patients were highly distinct from those of healthy individuals. Lower bacterial diversity was observed in ASD children compared to controls, especially in dental samples...
January 25, 2018: Scientific Reports
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