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https://www.readbyqxmd.com/read/28796833/bile-microbiota-in-primary-sclerosing-cholangitis-impact-on-disease-progression-and-development-of-biliary-dysplasia
#1
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/28752291/composition-and-abundance-of-microbiota-in-the-pharynx-in-patients-with-laryngeal-carcinoma-and-vocal-cord-polyps
#2
Hongli Gong, Boyan Wang, Yi Shi, Yong Shi, Xiyan Xiao, Pengyu Cao, Lei Tao, Yuezhu Wang, Liang Zhou
The pharynx is an important site of microbiota colonization, but the bacterial populations at this site have been relatively unexplored by culture-independent approaches. The aim of this study was to characterize the microbiota structure of the pharynx. Pyrosequencing of 16S rRNA gene libraries was used to characterize the pharyngeal microbiota using swab samples from 68 subjects with laryngeal cancer and 28 subjects with vocal cord polyps. Overall, the major phylum was Firmicutes, with Streptococcus as the predominant genus in the pharyngeal communities...
August 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28746890/aged-engineered-nanoparticles-effect-on-sludge-anaerobic-digestion-performance-and-associated-microbial-communities
#3
Samuel Eduok, Robert Ferguson, Bruce Jefferson, Raffaella Villa, Frédéric Coulon
To investigate the potential effect of aged engineered nanoparticles (a-ENPs) on sludge digestion performance, 150L pilot anaerobic digesters (AD) were fed with a blend of primary and waste activated sludge spiked either with a mixture of silver oxide, titanium dioxide and zinc oxide or a mixture of their equivalent bulk metal salts to achieve a target concentration of 250, 2000, and 2800mgkg(-1) dry weight, respectively. Volatile fatty acids (VFA) were 1.2 times higher in the spiked digesters and significantly different (p=0...
July 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28744281/age-related-variations-in-intestinal-microflora-of-free-range-and-caged-hens
#4
Yizhe Cui, Qiuju Wang, Shengjun Liu, Rui Sun, Yaqiang Zhou, Yue Li
Free range feeding pattern puts the chicken in a mixture of growth materials and enteric bacteria excreted by nature, while it is typically unique condition materials and enteric bacteria in commercial caged hens production. Thus, the gastrointestinal microflora in two feeding patterns could be various. However, it remains poorly understood how feeding patterns affect development and composition of layer hens' intestinal microflora. In this study, the effect of feeding patterns on the bacteria community in layer hens' gut was investigated using free range and caged feeding form...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28740374/characterization-of-throat-microbial-flora-in-smokers-with-or-without-copd
#5
Wenqi Diao, Ning Shen, Yipeng Du, Ke Qian, Bei He
The study aimed to determine the relationship between throat microbiome and COPD. Sixty-five Chinese males (n=20, smokers without COPD; n=45 smokers with COPD) were included. Nonmetric multidimensional scaling indicated differences of microbiome between COPD and controls, but no difference was observed between COPD patients with differing degrees of lung function or disease severity. Rarefaction analyses suggested that operational taxonomic units (OTUs, species-level) richness decreased in COPD. The dominant taxa between COPD and controls were similar, but the proportions of taxonomic distribution were different...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28740183/design-and-validation-of-a-dna-microarray-for-phylogenetic-analysis-of-bacterial-communities-in-different-oral-samples-and-dental-implants
#6
Carola Parolin, Barbara Giordani, Rogers Alberto Ñahui Palomino, Elena Biagi, Marco Severgnini, Clarissa Consolandi, Giada Caredda, Stefano Storelli, Laura Strohmenger, Beatrice Vitali
The quali-quantitative characterization of the oral microbiota is crucial for an exhaustive knowledge of the oral ecology and the modifications of the microbial composition that occur during periodontal pathologies. In this study, we designed and validated a new phylogenetic DNA-microarray (OralArray) to quickly and reliably characterize the most representative bacterial groups that colonize the oral cavity. The OralArray is based on the Ligation Detection Reaction technology associated to Universal Arrays (LDR-UA), and includes 22 probe sets targeted to bacteria belonging to the phyla Firmicutes, Proteobacteria, Actinobacteria, Bacteroidetes, Fusobacteria, and Spirochaete...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28713780/tumor-targeting-by-fusobacterium-nucleatum-a-pilot-study-and-future-perspectives
#7
Jawad Abed, Naseem Maalouf, Lishay Parhi, Stella Chaushu, Ofer Mandelboim, Gilad Bachrach
Colorectal adenocarcinoma (CRC) is a common tumor with high mortality rates. Interestingly, CRC was found to be colonized by the oral anaerobic bacteria Fusobacterium nucleatum, which accelerates tumor progression and enables immune evasion. The CRC-specific colonization by fusobacteria is mediated through the recognition of tumor displayed Gal-GalNAc moieties by the fusobacterial Fap2 Gal-GalNAc lectin. Here, we show high Gal-GalNAc levels in additional adenocarcinomas including those found in the stomach, prostate, ovary, colon, uterus, pancreas, breast, lung, and esophagus...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28646338/chemotherapy-induced-gastrointestinal-toxicity-is-associated-with-changes-in-serum-and-urine-metabolome-and-fecal-microbiota-in-male-sprague-dawley-rats
#8
COMPARATIVE STUDY
Richard A Forsgård, Vannina G Marrachelli, Katri Korpela, Rafael Frias, Maria Carmen Collado, Riitta Korpela, Daniel Monleon, Thomas Spillmann, Pia Österlund
PURPOSE: Chemotherapy-induced gastrointestinal toxicity (CIGT) is a complex process that involves multiple pathophysiological mechanisms. We have previously shown that commonly used chemotherapeutics 5-fluorouracil, oxaliplatin, and irinotecan damage the intestinal mucosa and increase intestinal permeability to iohexol. We hypothesized that CIGT is associated with alterations in fecal microbiota and metabolome. Our aim was to characterize these changes and examine how they relate to the severity of CIGT...
August 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28633639/fusobacterial-liver-abscess-a-case-report-and-review-of-the-literature
#9
Dilip Jayasimhan, Linus Wu, Paul Huggan
BACKGROUND: Fusobacteriae are facultative anaerobic gram-negative bacilli which cause a range of invasive infections, amongst which pyogenic liver abscesses are rare. We describe a case of Fusobacterium nucleatum liver abscess and review the relevant literature. CASE PRESENTATION: A 51-year-old lady presented with a 4-day history of abdominal pain, diarrhoea, fever, rigors, and lethargy. Imaging revealed an abscess which was drained. Cultures of the blood and abscess aspirate grew Fusobacterium nucleatum and Prevotella pleuritidis respectively...
June 20, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28626453/zinc-oxide-nanoparticles-influence-microflora-in-ileal-digesta-and-correlate-well-with-blood-metabolites
#10
Yanni Feng, Lingjiang Min, Weidong Zhang, Jing Liu, Zhumei Hou, Meiqiang Chu, Lan Li, Wei Shen, Yong Zhao, Hongfu Zhang
Zinc oxide nanoparticles (ZnO NPs) are used widely in consumer and industrial products, however, their influence on gut microbiota and metabolism and their mutual interactions are not fully understood. In this study, the effects of ZnO NPs on ileal bacterial communities, plasma metabolites, and correlations between them were investigated. Hens were fed with different concentrations of ZnO NPs [based on Zn; 0 mg/kg (control), 25 mg/kg, 50 mg/kg, and 100 mg/kg] for 9 weeks. Subsequently, ileal digesta and blood plasma were collected for analysis of microflora and metabolites, respectively...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28600626/mucosa-associated-microbiota-signature-in-colorectal-cancer
#11
R Gao, C Kong, L Huang, H Li, X Qu, Z Liu, P Lan, J Wang, H Qin
The aim of this study was to explore the gut microbiota profiles of colorectal cancer (CRC) patients and to examine the relationship between gut microbiota and other key molecular factors involved in CRC tumorigenesis. In this study, a 16S rDNA sequencing platform was used to identify possible differences in the microbiota signature between CRC and adjacent normal mucosal tissue. Differences in the microbiota composition in different anatomical colorectal tumor sites and their potential association with KRAS mutation were also explored...
June 9, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28588566/gut-bacteria-missing-in-severe-acute-malnutrition-can-we-identify-potential-probiotics-by-culturomics
#12
Maryam Tidjani Alou, Matthieu Million, Sory I Traore, Donia Mouelhi, Saber Khelaifia, Dipankar Bachar, Aurelia Caputo, Jeremy Delerce, Souleymane Brah, Daouda Alhousseini, Cheikh Sokhna, Catherine Robert, Bouli A Diallo, Aldiouma Diallo, Philippe Parola, Michael Golden, Jean-Christophe Lagier, Didier Raoult
Severe acute malnutrition is the world-leading cause of children under-five's death. Recent metagenomics studies have established a link between gut microbiota and severe acute malnutrition, describing an immaturity with a striking depletion in oxygen-sensitive prokaryotes. Amoxicillin and therapeutic diet cure most of the children with severe acute malnutrition but an irreversible disruption of the gut microbiota is suspected in the refractory and most severe cases. In these cases, therapeutic diet may be unable to reverse the microbiota alteration leading to persistent impaired development or death...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28534987/high%C3%A2-throughput-sequencing-analyses-of-oral-microbial-diversity-in-healthy-people-and-patients-with-dental-caries-and-periodontal-disease
#13
Tingtao Chen, Yan Shi, Xiaolei Wang, Xin Wang, Fanjing Meng, Shaoguo Yang, Jian Yang, Hongbo Xin
Recurrence of oral diseases caused by antibiotics has brought about an urgent requirement to explore the oral microbial diversity in the human oral cavity. In the present study, the high‑throughput sequencing method was adopted to compare the microbial diversity of healthy people and oral patients and sequence analysis was performed by UPARSE software package. The Venn results indicated that a mean of 315 operational taxonomic units (OTUs) was obtained, and 73, 64, 53, 19 and 18 common OTUs belonging to Firmicutes, Bacteroidetes, Proteobacteria, Actinobacteria and Fusobacteria, respectively, were identified in healthy people...
July 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28498878/the-malleable-gut-microbiome-of-juvenile-rainbow-trout-oncorhynchus-mykiss-diet-dependent-shifts-of-bacterial-community-structures
#14
Stéphanie Céline Michl, Jenni-Marie Ratten, Matt Beyer, Mario Hasler, Julie LaRoche, Carsten Schulz
Plant-derived protein sources are the most relevant substitutes for fishmeal in aquafeeds. Nevertheless, the effects of plant based diets on the intestinal microbiome especially of juvenile Rainbow trout (Oncorhynchus mykiss) are yet to be fully investigated. The present study demonstrates, based on 16S rDNA bacterial community profiling, that the intestinal microbiome of juvenile Rainbow trout is strongly affected by dietary plant protein inclusion levels. After first feeding of juveniles with either 0%, 50% or 97% of total dietary protein content derived from plants, statistically significant differences of the bacterial gut community for the three diet-types were detected, both at phylum and order level...
2017: PloS One
https://www.readbyqxmd.com/read/28486933/influence-of-chronic-azithromycin-treatment-on-the-composition-of-the-oropharyngeal-microbial-community-in-patients-with-severe-asthma
#15
Guido Lopes Dos Santos Santiago, Guy Brusselle, Kenny Dauwe, Pieter Deschaght, Chris Verhofstede, Dries Vaneechoutte, Ellen Deschepper, Paul Jordens, Guy Joos, Mario Vaneechoutte
BACKGROUND: This study of the oropharyngeal microbiome complements the previously published AZIthromycin in Severe ASThma (AZISAST) clinical trial, where the use of azithromycin was assessed in subjects with exacerbation-prone severe asthma. Here, we determined the composition of the oropharyngeal microbial community by means of deep sequencing of the amplified 16S rRNA gene in oropharyngeal swabs from patients with exacerbation-prone severe asthma, at baseline and during and after 6 months treatment with azithromycin or placebo...
May 10, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28479399/metagenomics-analysis-of-gut-microbiota-and-immune-modulation-in-zebrafish-danio-rerio-fed-chitosan-silver-nanocomposites
#16
R M C Udayangani, S H S Dananjaya, Chamilani Nikapitiya, Gang-Joon Heo, Jehee Lee, Mahanama De Zoysa
In this study, we evaluated the effects of chitosan silver nanocomposites (CAgNCs) supplemented diet on gut microbial community, goblet cell density, gut morphometry and mRNA expression of immune related and mucin encoding genes in zebrafish. Zebrafish gut microbiota analysis results clearly showed the reduction of phylum Proteobacteria. However, they remained as the major bacterial group in gut with CAgNCs supplemented diet, while the abundance of phylum Fusobacteria and phylum Bacteroidetes were increased notably compared to the control diet fed fish...
May 4, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28448583/characterization-of-the-fecal-microbiome-during-neonatal-and-early-pediatric-development-in-puppies
#17
Blake C Guard, Hanna Mila, Jörg M Steiner, Claire Mariani, Jan S Suchodolski, Sylvie Chastant-Maillard
Limited information is available describing the development of the neonatal fecal microbiome in dogs. Feces from puppies were collected at 2, 21, 42, and 56 days after birth. Feces were also collected from the puppies' mothers at a single time point within 24 hours after parturition. DNA was extracted from fecal samples and 454-pyrosequencing was used to profile 16S rRNA genes. Species richness continued to increase significantly from 2 days of age until 42 days of age in puppies. Furthermore, microbial communities clustered separately from each other at 2, 21, and 42 days of age...
2017: PloS One
https://www.readbyqxmd.com/read/28434745/hot-topic-16s-rrna-gene-sequencing-reveals-the-microbiome-of-the-virgin-and-pregnant-bovine-uterus
#18
S G Moore, A C Ericsson, S E Poock, P Melendez, M C Lucy
We tested the hypothesis that the uterus of virgin heifers and pregnant cows possessed a resident microbiome by 16S rRNA gene sequencing of the virgin and pregnant bovine uterus. The endometrium of 10 virgin heifers in estrus and the amniotic fluid, placentome, intercotyledonary placenta, cervical lumen, and external cervix surface (control) of 5 pregnant cows were sampled using aseptic techniques. The DNA was extracted, the V4 hypervariable region of the 16S rRNA gene was amplified, and amplicons were sequenced using Illumina MiSeq technology (Illumina Inc...
June 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28434085/exploring-the-oral-microflora-of-preschool-children
#19
Wen Ren, Qun Zhang, Xuenan Liu, Shuguo Zheng, Lili Ma, Feng Chen, Tao Xu, Baohua Xu
The oral cavity is one of the most important and complicated habitats in our body and supports diverse microbial communities. In this study, we aimed to determine the bacterial diversity and composition of various oral micro-niches. Samples were collected from supragingival plaque, saliva, and tongue coating from 10 preschool children (30 samples total). 16S rRNA gene pyrosequencing dataset generated 314,639 clean reads with an average of 10,488 ± 2,787 reads per sample. The phyla Firmicutes, Proteobacteria, Actinobacteria, Bacteroidetes, and Fusobacteria were predominant, accounting for more than 90% of the total sequences...
April 22, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28413200/the-oral-microbiome-community-variations-associated-with-normal-potentially-malignant-disorders-and-malignant-lesions-of-the-oral-cavity
#20
S F Mok, C Karuthan, Y K Cheah, W C Ngeow, Z Rosnah, S F Yap, H K A Ong
The human oral microbiome has been known to show strong association with various oral diseases including oral cancer. This study attempts to characterize the community variations between normal, oral potentially malignant disorders (OPMD) and cancer associated microbiota using 16S rDNA sequencing. Swab samples were collected from three groups (normal, OPMD and oral cancer) with nine subjects from each group. Bacteria genomic DNA was isolated in which full length 16S rDNA were amplified and used for cloned library sequencing...
April 2017: Malaysian Journal of Pathology
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