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Microbiome or microbiota or commensal

M ElSalhy, E Söderling, E Honkala, M Fontana, S Flannagan, A Kokaras, B J Paster, A Varghese, S Honkala
AIM: To compare the composition of the salivary microbiota in caries-affected vs. caries-free mutans streptococci (MS)- positive children with mixed dentition. MATERIALS AND METHODS: Twenty eight healthy, 11-12-year-old schoolchildren with high MS counts (>10⊃5 CFU/mL) were included in this study. The children were screened with the Dentocult SM Strip Mutans test (Orion Diagnostica, Espoo, Finland) and examined using the International Caries Detection and Assessment System (ICDAS)...
September 2016: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
S S Garcia, Q Du, H Wu
The oral cavity is a dynamic environment characterized by hundreds of bacterial species, saliva, and an influx of nutrients and metal ions such as copper. Although there is a physiologic level of copper in the saliva, the oral cavity is often challenged with an influx of copper ions. At high concentrations copper is toxic and must therefore be strictly regulated by pathogens for them to persist and cause disease. The cariogenic pathogen Streptococcus mutans manages excess copper using the copYAZ operon that encodes a negative DNA-binding repressor (CopY), the P1-ATPase copper exporter (CopA), and the copper chaperone (CopZ)...
December 21, 2015: Molecular Oral Microbiology
I Kafantaris, B Kotsampasi, V Christodoulou, E Kokka, P Kouka, Z Terzopoulou, K Gerasopoulos, D Stagos, C Mitsagga, I Giavasis, S Makri, K Petrotos, D Kouretas
Grape pomace is a by-product of winemaking process and rich in bioactive compounds such as plant polyphenols having antioxidant and antimicrobial activities. As known, oxidative stress may cause a number of pathological conditions in farm animals and thus affecting animal welfare and production. Moreover, pathogenic bacteria affect animals' health status. Thus, the objective of this study was to investigate whether lambs' feed supplemented with grape pomace enhances the antioxidant mechanisms and reduces the growth of pathogenic bacteria...
October 18, 2016: Journal of Animal Physiology and Animal Nutrition
Yan Zhang, Stephanie E Simon, Jeff A Johnson, Michael S Allen
Gastrointestinal microbiota is increasingly recognized as an important component of individual health, and therefore, our ability to quantify its diversity accurately is central for exploring different ways to improve health. Non-invasive sampling methods, such as cloaca swabs, are often used to measure gastrointestinal microbiota diversity within an individual. However, few studies have addressed to what degree differences exist in microbial community composition along the gastrointestinal tract, and measures obtained from the cloaca may not actually represent the diversity present elsewhere in the gastrointestinal tract...
October 18, 2016: Microbial Ecology
Hirohiko Nakae, Ayumi Tsuda, Takashi Matsuoka, Tetsuya Mine, Yasuhiro Koga
OBJECTIVE: To investigate the structure of the gastric microbiota in functional dyspepsia (FD) and its role in the pathophysiology. DESIGN: We compared the basic physiological properties of the gastric fluid (GF) and the structure of the microbiota in the GF of 44 healthy control (HC) participants and 44 patients with FD. We then treated the patients with FD with a yogurt containing a probiotic strain of Lactobacillus gasseri OLL2716 (LG21 yogurt) and investigated the effects on the bacteriological parameters and symptoms to examine the relationship between them...
2016: BMJ Open Gastroenterology
Martin Hoenigl, Josué Pérez-Santiago, Masato Nakazawa, Michelli Faria de Oliveira, Yonglong Zhang, Malcolm A Finkelman, Scott Letendre, Davey Smith, Sara Gianella
BACKGROUND: The extent of gut microbial translocation, which plays roles in HIV disease progression and non-AIDS comorbidities, appears to vary with the composition of the gut microbiome, particularly the presence of Lactobacillales, which reduce mucosal injury. While low proportions of Lactobacillales in the distal gut microbiome are a very promising indicator of microbial translocation, measurement is expensive and complicated and not feasible for clinical routine. (1→3)-β-d-Glucan (BDG) is a component of most fungal cell walls and might be a surrogate marker for Lactobacillales proportion in the gut and a useful indicator of HIV-associated gut injury...
2016: Frontiers in Immunology
Drew D Kiraly, Deena M Walker, Erin S Calipari, Benoit Labonte, Orna Issler, Catherine J Pena, Efrain A Ribeiro, Scott J Russo, Eric J Nestler
Addiction to cocaine and other psychostimulants represents a major public health crisis. The development and persistence of addictive behaviors comes from a complex interaction of genes and environment - the precise mechanisms of which remain elusive. In recent years a surge of evidence has suggested that the gut microbiome can have tremendous impact on behavioral via the microbiota-gut-brain axis. In this study we characterized the influence of the gut microbiota on cocaine-mediated behaviors. Groups of mice were treated with a prolonged course of non-absorbable antibiotics via the drinking water, which resulted in a substantial reduction of gut bacteria...
October 18, 2016: Scientific Reports
Juan Gea-Banacloche, Krishna Komanduri, Paul Carpenter, Sophie Paczesny, Stefanie Sarantopoulos, Jo-Anne Young, Nahed El Kassar, Robert Q Le, Kirk Schultz, Linda M Griffith, Bipin Savani, John R Wingard
Immune reconstitution following hematopoietic stem cell transplantation (HCT) beyond one year is not completely understood. Many transplant recipients who are free of graft versus host disease (GVHD) and not receiving any immunosuppression more than a year after transplant seem to be able to mount appropriate immune responses to common pathogens and respond adequately to immunizations. However, two large registry studies over the last two decades seem to indicate that infection is a significant cause of late mortality in some patients, even in the absence of concomitant GVHD...
October 14, 2016: Biology of Blood and Marrow Transplantation
Juan Bai, Ying Zhu, Ying Dong
ETHNOPHARMACOLOGICAL RELEVANCE: Bitter melon (Momordica charantia L.) is rich in a variety of biologically active ingredients, and has been widely used in traditional Chinese medicine (TCM) to treat various diseases, including type 2 diabetes and obesity. AIM OF THE STUDY: We aimed to investigate how bitter melon powder (BMP) could affect obesity-associated inflammatory responses to ameliorate high-fat diet (HFD)-induced insulin resistance, and investigated whether its anti-inflammatory properties were effected by modulating the gut microbiota...
October 14, 2016: Journal of Ethnopharmacology
Emilie Cauchie, Mathieu Gand, Gilles Kergourlay, Bernard Taminiau, Laurent Delhalle, Nicolas Korsak, Georges Daube
In order to control food losses and wastage, monitoring the microbial diversity of food products, during processing and storage is important, as studies have highlighted the metabolic activities of some microorganisms which can lead to spoilage. Knowledge of this diversity can be greatly improved by using a metagenetic approach based on high throughput 16S rRNA gene sequencing, which enables a much higher resolution than culture-based methods. Moreover, the Jameson effect, a phenomenon described by Jameson in 1962, is often used to classify bacterial strains within an ecosystem...
October 12, 2016: International Journal of Food Microbiology
Natália A Borges, Amanda F Barros, Lia S Nakao, Carla J Dolenga, Denis Fouque, Denise Mafra
OBJECTIVE: Protein-bound uremic toxins from gut microbiota tend to accumulate in chronic kidney disease (CKD) patients and are poorly removed by current dialysis techniques. These toxins induce inflammation and are associated with cardiovascular disease (CVD). The aim of this study was to report the relationship between uremic toxins and inflammatory and cardiovascular markers in CKD patients. DESIGN: This was a cross sectional study. SUBJECTS: Twenty-one nondialysis patients were included (43% men, 63...
November 2016: Journal of Renal Nutrition
Yanling Wei, Jun Yang, Jun Wang, Yang Yang, Juan Huang, Hao Gong, Hongli Cui, Dongfeng Chen
BACKGROUND: The dysbiosis of intestinal microbiota plays an important role in the development of gut-derived infections, making it a potential therapeutic target against multiple organ dysfunction syndrome (MODS) after sepsis. However, the effectiveness of fecal microbiota transplantation (FMT) in treating this disease has been rarely investigated. METHODS: Two male patients, a 65-year-old and an 84-year-old, were initially diagnosed with cerebellar hemorrhage and cerebral infarction, respectively, after admission...
October 18, 2016: Critical Care: the Official Journal of the Critical Care Forum
S A Sarker, B Berger, Y Deng, S Kieser, F Foata, D Moine, P Descombes, S Sultana, S Huq, P K Bardhan, V Vuillet, F Praplan, H Brüssow
A T4-like coliphage cocktail was given with different oral doses to healthy Bangladeshi children in a placebo-controlled randomized phase I safety trial. Fecal phage detection was oral dose dependent suggesting passive gut transit of coliphages through the gut. No adverse effects of phage application were seen clinically and by clinical chemistry. Similar results were obtained for a commercial phage preparation (Coliproteus from Microgen/Russia). By 16S rRNA gene sequencing only a low degree of fecal microbiota conservation was seen in healthy children from Bangladesh who were sampled over a time interval of 7 days suggesting a substantial temporal fluctuation of the fecal microbiota composition...
October 17, 2016: Environmental Microbiology
Rima Rachid, Talal A Chatila
PURPOSE OF REVIEW: The rise in the prevalence of food allergy over the past decades has focused attention of factors that may impact disease development, most notably the gut microbiota. The gut microbial communities play a crucial role in promoting oral tolerance. Their alteration by such factors as Cesarean section delivery, diet and antibiotics may influence disease development. This review highlights recent progress in our understanding of the role of the gut microbiota in the development of food allergy...
September 28, 2016: Current Opinion in Pediatrics
Brianna Johnson-King, Sharon F Terry
No abstract text is available yet for this article.
October 2016: Genetic Testing and Molecular Biomarkers
Naoji Yubuki, Eliška Zadrobílková, Ivan Čepička
Fornicata (Metamonada) is a group of Excavata living in low oxygen environments and lacking conventional mitochondria. It includes free-living Carpediemonas-like organisms from marine habitats and predominantly parasitic/commensal retortamonads and diplomonads. Current modest knowledge of biodiversity of Fornicata limits our ability to draw a complete picture of the evolutionary history in this group. Here, we report the discovery of a novel fornicate, Iotanema spirale gen. nov. et sp. nov., obtained from fresh feces of the gecko Phelsuma madagascariensis...
October 17, 2016: Journal of Eukaryotic Microbiology
Chun Chen, Qiang Huang, Xiong Fu, Rui Hai Liu
This study investigated the in vitro fermentation of polysaccharides from Morus alba L., the contribution of its carbohydrates to the fermentation, and the effect on the composition of gut microbiota. Over 48 h of fermentation, the pH value in the fecal culture decreased from 7.12 to 6.14, and the total short chain fatty acids (SCFA) and acetic, propionic, and butyric acids all significantly increased. After 48 h of fermentation, 45.36 ± 1.36% of the total carbohydrates in the polysaccharide, including 35...
October 17, 2016: Food & Function
Ilias Lagkouvardos, Rüdiger Pukall, Birte Abt, Bärbel U Foesel, Jan P Meier-Kolthoff, Neeraj Kumar, Anne Bresciani, Inés Martínez, Sarah Just, Caroline Ziegler, Sandrine Brugiroux, Debora Garzetti, Mareike Wenning, Thi P N Bui, Jun Wang, Floor Hugenholtz, Caroline M Plugge, Daniel A Peterson, Mathias W Hornef, John F Baines, Hauke Smidt, Jens Walter, Karsten Kristiansen, Henrik B Nielsen, Dirk Haller, Jörg Overmann, Bärbel Stecher, Thomas Clavel
No abstract text is available yet for this article.
October 17, 2016: Nature Microbiology
John Chu, Xavier Vila-Farres, Daigo Inoyama, Melinda Ternei, Louis J Cohen, Emma A Gordon, Boojala Vijay B Reddy, Zachary Charlop-Powers, Henry A Zebroski, Ricardo Gallardo-Macias, Mark Jaskowski, Shruthi Satish, Steven Park, David S Perlin, Joel S Freundlich, Sean F Brady
Here we present a natural product discovery approach, whereby structures are bioinformatically predicted from primary sequence and produced by chemical synthesis (synthetic-bioinformatic natural products, syn-BNPs), circumventing the need for bacterial culture and gene expression. When we applied the approach to nonribosomal peptide synthetase gene clusters from human-associated bacteria, we identified the humimycins. These antibiotics inhibit lipid II flippase and potentiate β-lactam activity against methicillin-resistant Staphylococcus aureus in mice, potentially providing a new treatment regimen...
October 17, 2016: Nature Chemical Biology
Mackenzie L Lauro, Elizabeth A D'Ambrosio, Brian J Bahnson, Catherine Leimkuhler Grimes
Genetic mutations in the innate immune receptor nucleotide-binding oligomerization domain-containing 2 (Nod2) have demonstrated increased susceptibility to Crohn's disease, an inflammatory bowel disease which is hypothesized to be accompanied by changes in the gut microbiota. Nod2 responds to the presence of bacteria, specifically a fragment of the bacterial cell wall, muramyl dipeptide (MDP). The proposed site of this interaction is the leucine-rich repeat (LRR) domain. Surface plasmon resonance and molecular modeling were used to investigate the interaction of the LRR domain with MDP...
October 17, 2016: ACS Infectious Diseases
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