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https://www.readbyqxmd.com/read/28822764/effect-of-nitric-oxide-releasing-derivative-of-indomethacin-on-prevotella-intermedia-lipopolysaccharide-induced-production-of-proinflammatory-mediators-in-murine-macrophages
#1
So-Hui Choe, Eun-Young Choi, Jin-Yi Hyeon, In Soon Choi, Sung-Jo Kim
The purpose of this study was to investigate the influences of NCX 2121, a nitric oxide (NO)-releasing derivative of indomethacin, upon the generation of proinflammatory mediators using murine macrophages activated by lipopolysaccharide (LPS) isolated from Prevotella intermedia, which is one of the pathogens implicated in periodontal diseases. Inducible NO synthase (iNOS)-derived NO, IL-1β and IL-6 as well as their relevant mRNA were significantly attenuated by NCX 2121 in RAW264.7 cells activated by P. intermedia LPS...
August 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28821458/dipeptidyl-peptidase-iv-and-quorum-sensing-signaling-in-biofilm-related-virulence-of-prevotella-aurantiaca
#2
Dareen Fteita, Ahmed Ali Musrati, Eija Könönen, Xiaochu Ma, Mervi Gürsoy, Markus Peurla, Eva Söderling, Herman O Sintim, Ulvi Kahraman Gürsoy
Biofilm formation and dipeptidyl peptidase IV (DPPIV) enzyme activity contribute to the virulence of oral bacteria, and these virulence factors are partly regulated by quorum sensing signaling system. We recently demonstrated that estradiol regulates growth properties and DPPIV activity of Prevotella intermedia, Prevotella nigrescens, and Prevotella pallens. Here, we examined the DPPIV dependency of biofilm formation of Prevotella aurantiaca. Three strains (two clinical strains AHN 37505 and 37552 and the type strain CCUG 57723) were incubated in three estradiol concentrations (30, 90, and 120 nmol/L)...
August 15, 2017: Anaerobe
https://www.readbyqxmd.com/read/28815303/effect-of-barley-supplementation-on-the-fecal-microbiota-caecal-biochemistry-and-key-biomarkers-of-obesity-and-inflammation-in-obese-db-db-mice
#3
Jose F Garcia-Mazcorro, David A Mills, Kevin Murphy, Giuliana Noratto
PURPOSE: Barley is a low-glycemic index grain that can help diabetic and obese patients. The effect of barley intake depends on the host and the associated gut microbiota. This study investigated the effect of barley intake on the fecal microbiota, caecal biochemistry, and key biomarkers of obesity and inflammation. METHODS: Obese db/db mice were fed diets with and without barley during 8 weeks; lean mice were used as lean controls. Fecal microbiota was evaluated using 16S marker gene sequencing in a MiSeq instrument; several markers of caecal biochemistry, obesity, and inflammation were also evaluated using standard techniques...
August 16, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28814977/worse-inflammatory-profile-in-omnivores-than-in-vegetarians-associates-with-the-gut-microbiota-composition
#4
Ana Carolina Franco-de-Moraes, Bianca de Almeida-Pititto, Gabriel da Rocha Fernandes, Everton Padilha Gomes, Alexandre da Costa Pereira, Sandra Roberta G Ferreira
AIMS: To describe the abundance of major phyla and some genera in the gut microbiota of individuals according to dietary habits and examine their associations with inflammatory markers, insulin resistance, and cardiovascular risk profile. METHODS: A total of 268 non-diabetic individuals were stratified into groups of dietary types (strict vegetarians, lacto-ovo-vegetarians, and omnivores). The taxonomic composition and phylogenetic structure of the microbiota were obtained through the analysis of the 16S rRNA gene...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28814395/fecal-concentrations-of-bacterially-derived-vitamin-k-forms-are-associated-with-gut-microbiota-composition-but-not-plasma-or-fecal-cytokine-concentrations-in-healthy-adults
#5
J Philip Karl, Mohsen Meydani, Junaidah B Barnett, Sally M Vanegas, Kathryn Barger, Xueyan Fu, Barry Goldin, Anne Kane, Helen Rasmussen, Pajau Vangay, Dan Knights, Satya S Jonnalagadda, Edward Saltzman, Susan B Roberts, Simin N Meydani, Sarah L Booth
Background: Emerging evidence suggests novel roles for bacterially derived vitamin K forms known as menaquinones in health and disease, which may be attributable in part to anti-inflammatory effects. However, the relevance of menaquinones produced by gut bacteria to vitamin K requirements and inflammation is undetermined.Objective: This study aimed to quantify fecal menaquinone concentrations and identify associations between fecal menaquinone concentrations and serum vitamin K concentrations, gut microbiota composition, and inflammation...
August 16, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28808698/subgingival-microbiome-of-gingivitis-in-chinese-undergraduates
#6
Ke Deng, Xiang Ying Ouyang, Yi Chu, Qian Zhang
OBJECTIVE: To analyse the microbiome composition of health and gingivitis in Chinese undergraduates with high-throughput sequencing. METHODS: Sequencing of 16S rRNA gene amplicons was performed with the MiSeq system to compare subgingival bacterial communities from 54 subjects with gingivitis and 12 periodontally healthy controls. RESULTS: A total of 1,967,372 sequences representing 14 phyla, 104 genera, and 96 species were detected. Analysis of similarities (Anosim) test and Principal Component Analysis (PCA) showed significantly different community profiles between the health control and the subjects with gingivitis...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28803419/specific-periodontopathic-bacterial-infection-affects-hypertension-in-male-cardiovascular-disease-patients
#7
Norio Aoyama, Jun-Ichi Suzuki, Hidetoshi Kumagai, Yuichi Ikeda, Hiroshi Akazawa, Issei Komuro, Masato Minabe, Yuichi Izumi, Mitsuaki Isobe
Hypertension (HT) is a systemic disorder that results in the decline of quality of life and death. While patients with periodontitis are at a high risk of HT, little causal information has been provided to date. To clarify the relationship, periodontopathic bacterial infection in cardiovascular patients with or without HT was evaluated. The subjects were patients with (n = 412) or without (n = 199) HT who attended Tokyo Medical and Dental University hospital. Blood examinations and periodontal measurements were performed...
August 12, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28802721/comparison-of-commercially-available-preservatives-for-maintaining-the-integrity-of-bacterial-dna-in-human-milk
#8
Kimberly A Lackey, Janet E Williams, William J Price, Janae M Carrothers, Sarah L Brooker, Bahman Shafii, Mark A McGuire, Michelle K McGuire
BACKGROUND: Inhibiting changes to bacteria in human milk between sample collection and analysis is necessary for unbiased characterization of the milk microbiome. Although cold storage is considered optimal, alternative preservation is sometimes necessary. RESEARCH AIM/QUESTION: The objective of this study was to compare the effectiveness of several commercially-available preservatives with regard to maintaining bacterial DNA in human milk for delayed microbiome analysis...
August 9, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28801639/investigation-into-the-stability-and-culturability-of-chinese-enterotypes
#9
Yeshi Yin, Bin Fan, Wei Liu, Rongrong Ren, Huahai Chen, Shaofeng Bai, Liying Zhu, Gang Sun, Yunsheng Yang, Xin Wang
Although many gut microbial enterotypes have been reported in Europe, Africa and the U.S., their effects on human health are still not yet clear. Culturing gut microbial enterotypes in vitro will be helpful to study their effects and applications. Here, fecal samples from 13 healthy Chinese volunteers were collected and subjected to next-generation sequencing. The results showed that seven of these samples belong to the Bacteroides enterotype and another six to the Prevotella enterotype. Stability of these Chinese gut microbial enterotypes was also evaluated...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28800622/microbial-profile-comparisons-of-saliva-pooled-and-site-specific-subgingival-samples-in-periodontitis-patients
#10
Daniel Belstrøm, Maria Lynn Sembler-Møller, Maria Anastasia Grande, Nikolai Kirkby, Sean Liam Cotton, Bruce J Paster, Palle Holmstrup
OBJECTIVES: The purpose of this study was to compare microbial profiles of saliva, pooled and site-specific subgingival samples in patients with periodontitis. We tested the hypotheses that saliva can be an alternative to pooled subgingival samples, when screening for presence of periopathogens. DESIGN: Site specific subgingival plaque samples (n = 54), pooled subgingival plaque samples (n = 18) and stimulated saliva samples (n = 18) were collected from 18 patients with generalized chronic periodontitis...
2017: PloS One
https://www.readbyqxmd.com/read/28798330/metabolic-networks-for-nitrogen-utilization-in-prevotella-ruminicola-23
#11
Jong Nam Kim, Celia Méndez-García, Renae R Geier, Michael Iakiviak, Jongsoo Chang, Isaac Cann, Roderick I Mackie
Nitrogen metabolism in gut systems remains poorly studied in spite of its importance for microbial growth and its implications for the metabolism of the host. Prevotella spp. are the most predominant bacteria detected in the rumen, but their presence has also been related to health and disease states in the human gut and oral cavity. To explore the metabolic networks for nitrogen assimilation in this bacterium, changes in gene expression profiles in response to variations in the available nitrogen source and to different concentrations of ammonium were analyzed by microarray and reverse transcription quantitative PCR, and linked with function by further proteomic analysis...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28797298/community-characteristics-of-the-gut-microbiomes-of-competitive-cyclists
#12
Lauren M Petersen, Eddy J Bautista, Hoan Nguyen, Blake M Hanson, Lei Chen, Sai H Lek, Erica Sodergren, George M Weinstock
BACKGROUND: Changes in diet and exercise can alter the gut microbiome of humans and mice; however, few studies to date have assessed the microbiomes of highly fit athletes. In this pilot study, we used metagenomic whole genome shotgun (mWGS) and metatranscriptomic (RNA-Seq) sequencing to show what organisms are both present and active in the gut microbiomes of both professional and amateur level competitive cyclists and to determine if any significant differences exist between these two groups...
August 10, 2017: Microbiome
https://www.readbyqxmd.com/read/28796833/bile-microbiota-in-primary-sclerosing-cholangitis-impact-on-disease-progression-and-development-of-biliary-dysplasia
#13
Pedro Pereira, Velma Aho, Johanna Arola, Sonja Boyd, Kalle Jokelainen, Lars Paulin, Petri Auvinen, Martti Färkkilä
OBJECTIVE: The etiopathogenesis and risk for development of biliary neoplasia in primary sclerosing cholangitis (PSC) are largely unknown. Microbes or their metabolites have been suggested to play a role. To explore this potential microbial involvement, we evaluated the differences in biliary microbiota in PSC patients at an early disease stage without previous endoscopic retrograde cholangiography (ERC) examinations, advanced disease stage, and with biliary dysplasia or cholangiocarcinoma...
2017: PloS One
https://www.readbyqxmd.com/read/28793252/human-gut-derived-commensal-bacteria-suppress-cns-inflammatory-and-demyelinating-disease
#14
Ashutosh Mangalam, Shailesh K Shahi, David Luckey, Melissa Karau, Eric Marietta, Ningling Luo, Rok Seon Choung, Josephine Ju, Ramakrishna Sompallae, Katherine Gibson-Corley, Robin Patel, Moses Rodriguez, Chella David, Veena Taneja, Joseph Murray
The human gut is colonized by a large number of microorganisms (∼10(13) bacteria) that support various physiologic functions. A perturbation in the healthy gut microbiome might lead to the development of inflammatory diseases, such as multiple sclerosis (MS). Therefore, gut commensals might provide promising therapeutic options for treating MS and other diseases. We report the identification of human gut-derived commensal bacteria, Prevotella histicola, which can suppress experimental autoimmune encephalomyelitis (EAE) in a human leukocyte antigen (HLA) class II transgenic mouse model...
August 8, 2017: Cell Reports
https://www.readbyqxmd.com/read/28790932/the-effects-of-weaning-methods-on-gut-microbiota-composition-and-horse-physiology
#15
Núria Mach, Aline Foury, Sandra Kittelmann, Fabrice Reigner, Marco Moroldo, Maria Ballester, Diane Esquerré, Julie Rivière, Guillaume Sallé, Philippe Gérard, Marie-Pierre Moisan, Léa Lansade
Weaning has been described as one of the most stressful events in the life of horses. Given the importance of the interaction between the gut-brain axis and gut microbiota under stress, we evaluated (i) the effect of two different weaning methods on the composition of gut microbiota across time and (ii) how the shifts of gut microbiota composition after weaning affect the host. A total of 34 foals were randomly subjected to a progressive (P) or an abrupt (A) weaning method. In the P method, mares were separated from foals at progressively increasing intervals every day, starting from five min during the fourth week prior to weaning and ending with 6 h during the last week before weaning...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28780383/microbiome-of-peri-implantitis-affected-and-healthy-dental-sites-in-patients-with-a-history-of-chronic-periodontitis
#16
Danae Apatzidou, David F Lappin, Graham Hamilton, Christos A Papadopoulos, Antonis Konstantinidis, Marcello P Riggio
OBJECTIVE: To determine the composition of the microbiome of peri-implantitis sites and corresponding dental sites in subjects with a history of chronic periodontitis. DESIGN: Clinical and radiographic examination assessed the periodontal/peri-implant disease status. Plaque samples were collected from one diseased implant with peri-implantitis, functional for at least two years and healthy sites in ten non-smokers who had received periodontal treatment prior to implant placement...
July 13, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28767890/chemical-composition-antioxidant-and-antibacterial-activities-of-essential-oils-from-leaves-and-flowers-of-eugenia-klotzschiana-berg-myrtaceae
#17
Nárgella S Carneiro, Cassia C F Alves, José M Alves, Mariana B Egea, Carlos H G Martins, Thayná S Silva, Lizandra C Bretanha, Maira P Balleste, Gustavo A Micke, Eduardo V Silveira, Mayker L D Miranda
Many essential oils (EOs) of different plant species possess interesting antimicrobial effects on buccal bacteria and antioxidant properties. Eugenia klotzschiana Berg (pêra-do-cerrado, in Portuguese) is a species of Myrtaceae with restricted distribution in the Cerrado. The essential oils were extracted through the hydrodistillation technique using a modified Clevenger apparatus (2 hours) and chemically characterized by GC-MS. The major compounds were α-copaene (10.6 %) found in oil from leaves in natura, β-bisabolene (17...
July 31, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28763642/fate-of-antibiotic-resistance-genes-and-their-associations-with-bacterial-community-in-livestock-breeding-wastewater-and-its-receiving-river-water
#18
Shuyu Jia, Xu-Xiang Zhang, Yu Miao, Yanting Zhao, Lin Ye, Bing Li, Tong Zhang
Large amounts of antibiotics are currently used in livestock breeding, which is the main driving factor contributing to the occurrence, spread and proliferation of antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) in the environment. In this study, high-throughput sequencing based metagenomic approaches were employed to characterize the tempo-spacial changes of antibiotic resistome, bacterial community and their correlations in pig farming wastewater and its receiving river. A total of 194 ARG subtypes within 14 ARG types were detectable in all the samples, and their total relative abundance increased in the river water after receiving wastewater discharge, while decreased in the downstream river water...
July 24, 2017: Water Research
https://www.readbyqxmd.com/read/28762001/high-grain-diets-altered-rumen-fermentation-and-epithelial-bacterial-community-and-resulted-in-rumen-epithelial-injuries-of-goats
#19
Ruiyang Zhang, Huimin Ye, Junhua Liu, Shengyong Mao
This study evaluated the effects of high-grain diets on the rumen fermentation, epithelial bacterial community, morphology of rumen epithelium, and local inflammation of goats during high-grain feeding. Twelve 8-month-old goats were randomly assigned to two different diets, a hay diet or a high-grain diet (65% grain, HG). At the end of 7 weeks of treatment, samples of rumen content and rumen epithelium were collected. Rumen pH was lower (P < 0.05), but the levels of volatile fatty acids and lipopolysaccharides were higher (P < 0...
August 1, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28761156/aggravation-of-collagen-induced-arthritis-by-orally-administered-porphyromonas-gingivalis-through-modulation-of-the-gut-microbiota-and-gut-immune-system
#20
Keisuke Sato, Naoki Takahashi, Tamotsu Kato, Yumi Matsuda, Mai Yokoji, Miki Yamada, Takako Nakajima, Naoki Kondo, Naoto Endo, Reiko Yamamoto, Yuichiro Noiri, Hiroshi Ohno, Kazuhisa Yamazaki
Porhyromonas gingivalis, a causative bacterium of periodontitis, is implicated in the etiology of rheumatoid arthritis (RA), mainly because of expressing peptidyl arginine deiminase (PAD) that generates RA-related autoantigens. However, compared with other periodontopathic bacteria, the precise role of P. gingivalis in RA is largely unknown. We found that orally administered P. gingivalis changed the gut microbiome with concomitant elevation of serum endotoxin and inflammatory markers, and impairment of the gut barrier function...
July 31, 2017: Scientific Reports
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