keyword
MENU ▼
Read by QxMD icon Read
search

Microbiome R

keyword
https://www.readbyqxmd.com/read/28740351/partners-of-patients-with-ulcerative-colitis-exhibit-a-biologically-relevant-dysbiosis-in-fecal-microbial-metacommunities
#1
Guang-Lan Chen, Ye Zhang, Wang-Yue Wang, Xue-Liang Ji, Fei Meng, Pei-Song Xu, Ning-Min Yang, Fu-Qiang Ye, Xiao-Chen Bo
AIM: To investigate alterations in the fecal microbiome using 16S rRNA amplicon sequencing in couples in the same cohabitation environment. METHODS: Fecal samples were collected from eight ulcerative colitis (UC) patients and their healthy partners at Lishui People's Hospital, Zhejiang Province, China. DNA was extracted and the variable regions V3 and V4 of the 16S rRNA genes were PCR amplified using a two-step protocol. Clear reads were clustered into operational taxonomic units (OTUs) at the 97% sequence similarity level using UCLUST v1...
July 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28733944/the-gastric-and-intestinal-microbiome-role-of-proton-pump-inhibitors
#2
REVIEW
Artem Minalyan, Lilit Gabrielyan, David Scott, Jonathan Jacobs, Joseph R Pisegna
PURPOSE OF REVIEW: The discovery of Helicobacter pylori and other organisms colonizing the stomach and the intestines has shed some light on the importance of microbiome in maintaining overall health and developing pathological conditions when alterations in biodiversity are present. The gastric acidity plays a crucial role in filtering out bacteria and preventing development of enteric infections. In this article, we discuss the physiology of gastric acid secretion and bacterial contribution to the composition of gastric and intestinal barriers and review the current literature on the role of proton pump inhibitors (PPIs) in the microbial biodiversity of the gastrointestinal tract...
August 2017: Current Gastroenterology Reports
https://www.readbyqxmd.com/read/28730551/pseudomonas-fluorescens-r68-assisted-enhancement-in-growth-and-fertilizer-utilization-of-amaranthus-tricolor-l
#3
C Jimtha John, P Jishma, N R Karthika, K S Nidheesh, J G Ray, Jyothis Mathew, E K Radhakrishnan
Plant probiotic potential of rhizosphere microbiome and its role in phytofertilizer mobilization are largely unexplored. In the current study, the rhizobacterium Pseudomonas fluorescens R68 (PFR68) isolated from Western Ghat was analyzed for its growth enhancement effect on the leafy vegetable Amaranthus tricolor (L.). One month of field growth of PFR68 inoculated A. tricolor has found to have enhanced growth parameters such as leaf number (1.57 fold), root number (1.76 fold), shoot length (1.28 fold) and fresh weight (2...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28730144/molecular-characterization-of-the-human-stomach-microbiota-in-gastric-cancer-patients
#4
Guoqin Yu, Javier Torres, Nan Hu, Rafael Medrano-Guzman, Roberto Herrera-Goepfert, Michael S Humphrys, Lemin Wang, Chaoyu Wang, Ti Ding, Jacques Ravel, Philip R Taylor, Christian C Abnet, Alisa M Goldstein
Helicobacter pylori (Hp) is the primary cause of gastric cancer but we know little of its relative abundance and other microbes in the stomach, especially at the time of gastric cancer diagnosis. Here we characterized the taxonomic and derived functional profiles of gastric microbiota in two different sets of gastric cancer patients, and compared them with microbial profiles in other body sites. Paired non-malignant and tumor tissues were sampled from 160 gastric cancer patients with 80 from China and 80 from Mexico...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28729854/microbiome-of-trichodesmium-colonies-from-the-north-pacific-subtropical-gyre
#5
Mary R Gradoville, Byron C Crump, Ricardo M Letelier, Matthew J Church, Angelicque E White
Filamentous diazotrophic Cyanobacteria of the genus Trichodesmium, often found in colonial form, provide an important source of new nitrogen to tropical and subtropical marine ecosystems. Colonies are composed of several clades of Trichodesmium in association with a diverse community of bacterial and eukaryotic epibionts. We used high-throughput 16S rRNA and nifH gene sequencing, carbon (C) and dinitrogen (N2) fixation assays, and metagenomics to describe the diversity and functional potential of the microbiome associated with Trichodesmium colonies collected from the North Pacific Subtropical Gyre (NPSG)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28727115/the-microbiota-gut-brain-axis-as-a-key-regulator-of-neural-function-and-the-stress-response-implications-for-human-and-animal-health
#6
N C Wiley, T G Dinan, R P Ross, C Stanton, G Clarke, J F Cryan
The brain-gut-microbiota axis comprises an extensive communication network between the brain, the gut, and the microbiota residing there. Development of a diverse gut microbiota is vital for multiple features of behavior and physiology, as well as many fundamental aspects of brain structure and function. Appropriate early-life assembly of the gut microbiota is also believed to play a role in subsequent emotional and cognitive development. If the composition, diversity, or assembly of the gut microbiota is impaired, this impairment can have a negative impact on host health and lead to disorders such as obesity, diabetes, inflammatory diseases, and even potentially neuropsychiatric illnesses, including anxiety and depression...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727105/analysis-of-the-gut-bacterial-communities-in-beef-cattle-and-their-association-with-feed-intake-growth-and-efficiency
#7
P R Myer, H C Freetly, J E Wells, T P L Smith, L A Kuehn
The impetus behind the global food security challenge is direct, with the necessity to feed almost 10 billion people by 2050. Developing a food-secure world, where people have access to a safe and sustainable food supply, is the principal goal of this challenge. To achieve this end, beef production enterprises must develop methods to produce more pounds of animal protein with less. Selection for feed-efficient beef cattle using genetic improvement technologies has helped to understand and improve the stayability and longevity of such traits within the herd...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727093/effects-of-intravenous-lipopolysaccharide-administration-on-feed-intake-ruminal-forage-degradability-and-liquid-parameters-and-physiological-responses-in-beef-cattle
#8
K D Lippolis, R F Cooke, K M Schubach, R S Marques, D W Bohnert
This experiment compared DMI, ruminal forage degradability, and liquid parameters as well as physiological responses in beef cattle receiving a lipopolysaccharide (LPS) challenge or not. Eight ruminally cannulated Angus × Hereford steers (485 ± 16 kg BW) were housed in individual pens on d -7, ranked by BW, and allocated to 1 of 2 treatments administered on d 0: 1) an intravenous (i.v.) bolus dose (0.5 μg/kg of BW, diluted in 5 mL of 0.9% sterile saline) of bacterial LPS ( 0111:B4) or 2) a 5-mL i.v. injection of 0...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727013/changes-in-the-rumen-bacterial-microbiome-of-cattle-exposed-to-ponderosa-pine-needles
#9
K D Welch, C A Stonecipher, D R Gardner, D Cook, J A Pfister
Consumption of ponderosa pine needles, as well as needles and bark from a number of other trees, can cause abortions in cattle. The abortifacient compounds in these trees are labdane resin acids, including isocupressic acid and agathic acid. Previous research has demonstrated that cattle conditioned to pine needles metabolize the labdane resin acids more quickly than naïve cattle. The results from that study indicated that changes had occurred in the rumen of conditioned cattle. Therefore, in this study, the changes that occurred in the rumen bacterial microflora of cattle during exposure to ponderosa pine needles were evaluated...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726511/how-do-probiotics-and-prebiotics-function-at-distant-sites
#10
G Reid, T Abrahamsson, M Bailey, L B Bindels, R Bubnov, K Ganguli, C Martoni, C O'Neill, H M Savignac, C Stanton, N Ship, M Surette, K Tuohy, S van Hemert
The realisation that microbes regarded as beneficial to the host can impart effects at sites distant from their habitat, has raised many possibilities for treatment of diseases. The objective of a workshop hosted in Turku, Finland, by the International Scientific Association for Probiotics and Prebiotics, was to assess the evidence for these effects and the extent to which early life microbiome programming influences how the gut microbiota communicates with distant sites. In addition, we examined how probiotics and prebiotics might affect the skin, airways, heart, brain and metabolism...
July 20, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28724546/high-protein-diet-promotes-sensitivity-to-cholecystokinin-and-shifts-the-cecal-microbiome-without-altering-brain-inflammation-in-diet-induced-obesity-in-rats
#11
Lixin Wang, Jonathan P Jacobs, Venu Lagishetty, Pu-Qing Yuan, Shuping Vincent Wu, Mulugeta Million, Joseph R Reeve, Joseph R Pisegna, Yvette Taché
High protein diet (HPD) curtails obesity and/or fat mass but it is unknown whether it reverses neuroinflammation, altered glucose levels, cholecystokinin (CCK) sensitivity and gut microbiome in rats fed a Western diet (WD)-induced obesity (DIO). Male rats fed a WD (high fat and sugar) for 12 weeks were switched to a HPD for 6 weeks. Body composition, food intake, meal pattern, sensitivity to intraperitoneal CCK-8S, blood glucose, brain signaling, and cecal microbiota were assessed. Compared to normal diet, WD increased body weight (9...
July 19, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28723553/a-commencement-for-eye-commensals
#12
Nancy J Reyes, Daniel R Saban
"Paucibacterial" levels of the normal eye surface have left immunologists wondering whether a true microbiome exists there. In this issue of Immunity, St. Leger et al. (2017) address this head-on, discovering a naturally existing commensal in mice that induces γδT cell-mediated protection from opportunistic infection.
July 18, 2017: Immunity
https://www.readbyqxmd.com/read/28722755/the-potential-of-anti-infectives-and-immunomodulators-as-therapies-for-asthma-and-asthma-exacerbations
#13
Michael R Edwards, Ross P Walton, David J Jackson, Wojciech Feleszko, Chrysanthi Skevaki, Tuomas Jartti, Heidi Makrinoti, Alexandra Nikonova, Igor Shilovskiy, Jurgen Schwarze, Sebastian L Johnston, Musa Khaitov
Asthma is responsible for approximately 25,000 deaths annually in Europe despite available medicines that maintain asthma control and reduce asthma exacerbations. Better treatments are urgently needed for the control of chronic asthma and reduction of asthma exacerbations, the major cause of asthma mortality. Much research spanning >20 years shows a strong association between microorganisms including pathogens in asthma onset, severity and exacerbation, yet with the exception of antibiotics, few treatments are available that specifically target the offending pathogens...
July 19, 2017: Allergy
https://www.readbyqxmd.com/read/28719392/intestinal-microbiome-in-scleroderma-recent-progress
#14
Elizabeth R Volkmann
PURPOSE OF REVIEW: Our evolving understanding of how gut microbiota affects immune function and homeostasis has led many investigators to explore the potentially pathologic role of gut microbiota in autoimmune diseases. This review will discuss the rapidly advancing field of microbiome research in systemic sclerosis (SSc), an incurable autoimmune disease with significant gastrointestinal morbidity and mortality. RECENT FINDINGS: Recent reports have identified common perturbations in gut microbiota across different SSc cohorts...
July 15, 2017: Current Opinion in Rheumatology
https://www.readbyqxmd.com/read/28719264/the-human-microbiome-in-the-fight-against-tuberculosis
#15
Madeleine R Wood, Elaine A Yu, Saurabh Mehta
AbstractThe human microbiome is an intriguing potentially modifiable risk factor in our arsenal against Mycobacterium tuberculosis, the leading infectious disease killer globally. Previous studies have shown associations between the human microbiome and pulmonary disease states; however, etiological links between the microbiome and tuberculosis (TB) infection or disease remain unclear. Immunomodulatory roles of the microbiome may prove to be a critical asset in the host response against TB, including in preventing TB infection, reducing progression from latency, mitigating disease severity, and lowering the incidence of drug resistance and coinfections...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28710076/opportunities-and-challenges-for-environmental-exposure-assessment-in-population-based-studies
#16
Chirag J Patel, Jacqueline Kerr, Duncan C Thomas, Bhramar Mukherjee, Beate Ritz, Nilanjan Chatterjee, Marta M Jankowska, Juliette Madan, Margaret R Karagas, Kimberly A McAllister, Leah E Mechanic, M Daniele Fallin, Christine Ladd-Acosta, Ian A Blair, Susan L Teiltelbaum, Christopher I Amos
BACKGROUND: A growing number and increasing diversity of factors are available for epidemiological studies. These measures provide new avenues for discovery and prevention yet they also raise many challenges for adoption in epidemiological investigations. METHODS: We evaluate 1) designs to investigate diseases that consider heterogeneous and multi-dimensional indicators of exposure and behavior, 2) the implementation of numerous methods to capture indicators of exposure, and 3) the analytical methods required for discovery and validation...
July 14, 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28709803/an-ocular-commensal-protects-against-corneal-infection-by-driving-an-interleukin-17-response-from-mucosal-%C3%AE-%C3%AE-t-cells
#17
Anthony J St Leger, Jigar V Desai, Rebecca A Drummond, Abirami Kugadas, Fatimah Almaghrabi, Phyllis Silver, Kumarkrishna Raychaudhuri, Mihaela Gadjeva, Yoichiro Iwakura, Michail S Lionakis, Rachel R Caspi
Mucosal sites such as the intestine, oral cavity, nasopharynx, and vagina all have associated commensal flora. The surface of the eye is also a mucosal site, but proof of a living, resident ocular microbiome remains elusive. Here, we used a mouse model of ocular surface disease to reveal that commensals were present in the ocular mucosa and had functional immunological consequences. We isolated one such candidate commensal, Corynebacterium mastitidis, and showed that this organism elicited a commensal-specific interleukin-17 response from γδ T cells in the ocular mucosa that was central to local immunity...
July 18, 2017: Immunity
https://www.readbyqxmd.com/read/28709393/microbiome-associated-with-severe-caries-in-canadian-first-nations-children
#18
M Agnello, J Marques, L Cen, B Mittermuller, A Huang, N Chaichanasakul Tran, W Shi, X He, R J Schroth
Young Indigenous children in North America suffer from a higher degree of severe early childhood caries (S-ECC) than the general population, leading to speculation that the etiology and characteristics of the disease may be distinct in this population. To address this knowledge gap, we conducted the first microbiome analysis of an Indigenous population using modern molecular techniques. We investigated the caries-associated microbiome among Canadian First Nations children with S-ECC. Thirty First Nations children <72 mo of age with S-ECC and 20 caries-free children were recruited in Winnipeg, Canada...
July 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28704445/taxon-abundance-diversity-co-occurrence-and-network-analysis-of-the-ruminal-microbiota-in-response-to-dietary-changes-in-dairy-cows
#19
Ilma Tapio, Daniel Fischer, Lucia Blasco, Miika Tapio, R John Wallace, Ali R Bayat, Laura Ventto, Minna Kahala, Enyew Negussie, Kevin J Shingfield, Johanna Vilkki
The ruminal microbiome, comprising large numbers of bacteria, ciliate protozoa, archaea and fungi, responds to diet and dietary additives in a complex way. The aim of this study was to investigate the benefits of increasing the depth of the community analysis in describing and explaining responses to dietary changes. Quantitative PCR, ssu rRNA amplicon based taxa composition, diversity and co-occurrence network analyses were applied to ruminal digesta samples obtained from four multiparous Nordic Red dairy cows fitted with rumen cannulae...
2017: PloS One
https://www.readbyqxmd.com/read/28704437/impact-of-environmental-microbiota-on-human-microbiota-of-workers-in-academic-mouse-research-facilities-an-observational-study
#20
Peggy S Lai, Joseph G Allen, Diane S Hutchinson, Nadim J Ajami, Joseph F Petrosino, Thomas Winters, Christopher Hug, Gary R Wartenberg, Jose Vallarino, David C Christiani
OBJECTIVES: To characterize the microbial environment of workers in academic mouse research facilities using endotoxin, 16S qPCR, and 16S amplicon sequencing. To determine whether the work microbiome contributes to the human microbiome of workers. METHODS: We performed area air sampling from the animal rooms, dirty, middle, and setup cage wash locations in four academic mouse research facilities. 10 workers in the dirty cage wash area underwent personal air sampling as well as repeated collection of nasal, oral, and skin samples before and after the work shift...
2017: PloS One
keyword
keyword
22313
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"