keyword
MENU ▼
Read by QxMD icon Read
search

Microbioms

keyword
https://www.readbyqxmd.com/read/29792526/phages-antibiotic-resistance-are-the-most-abundant-entities-on-earth-ready-for-a-comeback
#1
Colin Hill, Susan Mills, Reynolds P Ross
Bacteriophages, which lost out to antibiotic therapy in the past, may be poised to make a comeback. Once discarded because of their narrow activity spectrum, it can now be viewed as a major advantage that these intracellular, self-replicating entities can exert their killing effect with minimal damage to the commensal microbiome. In eastern Europe, phages continue to be used both prophylactically and therapeutically to treat infections. More recently, much needed regulated clinical trials are underway with a view to restoring phage therapy as a tool for mainstream medicine, although current regulations may impede their full potential...
May 24, 2018: Future Microbiology
https://www.readbyqxmd.com/read/29792385/an-organotypic-reconstructed-human-urethra-to-study-c-trachomatis-infection
#2
Bart Versteeg, Lenie J van den Broek, Sylvia Bruisten, Margriet Mullender, Henry J C de Vries, Susan Gibbs
Organotypic models to investigate host-microbiome interactions are still a challenge for the field of tissue engineering. This is particularly the case for organs such as the urethra. Several cell line, animal and tissue models are available to study C. trachomatis infections, but none fully reflect natural infection in native human tissue. Therefore, we developed an organotypic reconstructed human urethral model (RhU) to study invasive and non-invasive strains of C. trachomatis. Primary urethra cells were used to reconstruct epithelium on a fibroblast populated collagen-fibrin hydrogel, yielding a RhU...
May 24, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29791796/tracking-of-engineered-bacteria-in-vivo-using-non-standard-amino-acid-incorporation
#3
Pichet Praveschotinunt, Noemie-Manuelle Dorval Courchesne, Ilona den Hartog, Chaochen Lu, Jessica J Kim, Peter Q Nguyen, Neel S Joshi
The rapidly growing field of microbiome research presents a need for better methods of monitoring gut microbes in vivo with high spatial and temporal resolution. We report a method of tracking microbes in vivo within the gastrointestinal tract by programming them to incorporate non-standard amino acids (NSAA) and labeling them via click chemistry. Using established machinery constituting an orthogonal translation system (OTS), we engineered Escherichia coli to incorporate p-azido-L-phenylalanine (pAzF) in place of the UAG (amber) stop codon...
May 23, 2018: ACS Synthetic Biology
https://www.readbyqxmd.com/read/29791775/vaginal-microbiome-in-early-pregnancy-and-subsequent-risk-of-spontaneous-preterm-birth-a-case-control-study
#4
Negar Tabatabaei, A Murat Eren, Luis B Barreiro, Vania Yotova, Anne Dumaine, Catherine Allard, William D Fraser
OBJECTIVES: To explore differences in vaginal microbiome between preterm and term deliveries. DESIGN: Nested case-control study in 3D cohort. SETTING: Quebec, Canada. SAMPLE: Ninety-four cases with spontaneous preterm birth (17 early (<34 wk) and 77 late (34-36 wk) preterm birth) and 356 controls with term delivery (≥37 wk). METHODS: To assess vaginal microbiome by sequencing the V4 region of 16S ribosomal-RNA (rRNA) gene in swabs self-collected early pregnancy...
May 23, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29791773/vaginal-microbiome-studies-in-pregnancy-must-also-analyse-host-factors
#5
S S Witkin
It seems logical that the composition of the vaginal microbiota would be a significant variable influencing pregnancy outcome. Bacteria that are not part of the normal microbiota can trigger induction of myometrial contractions and premature delivery. Components of the endogenous microbiome may also be capable, under conditions still ill-defined, of interfering with pregnancy progression. This article is protected by copyright. All rights reserved.
May 23, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29790576/memory-t-cell-subsets-in-healthy-gingiva-and-periodontitis-tissues
#6
Rangsini Mahanonda, Chantrakorn Champaiboon, Keskanya Subbalekha, Noppadol Sa-Ard-Iam, Arsarn Yongyuth, Benjarat Isaraphithakkul, Pimprapa Rerkyen, Orawan Charatkulangkun, Sathit Pichyangkul
BACKGROUND: In the gingival sulcus, effective and balanced innate and adaptive immune responses against subgingival plaque microbiome are crucial to maintain immune homeostasis. In this study, we investigated the memory T cell subsets in healthy gingiva and periodontitis tissues. METHODS: Anatomical localization of T cells (CD3+ , CD4+ , and CD8+ ) in healthy gingiva and periodontitis tissues were examined immunohistochemically. Subsets of memory T cells from isolated gingival cells were analyzed by flow cytometry using a cocktail of monoclonal antibodies (anti-CD69, anti-CD103, anti-CD45RA, anti-CCR7, anti-CD28, and anti-CD95)...
May 23, 2018: Journal of Periodontology
https://www.readbyqxmd.com/read/29790546/dietary-fibers-prebiotics-and-exopolysaccharides-produced-by-lactic-acid-bacteria-potential-health-benefits-with-special-regard-to-cholesterol-lowering-effects
#7
REVIEW
E Korcz, Z Kerényi, L Varga
The gastrointestinal (GIT) microbiota, which plays a crucial role in human health, is influenced by a number of factors including diet. Consumption of specific dietary ingredients, such as dietary fibers and prebiotics, is an avenue by which the microbiota can be positively modulated. These substances may also reduce serum cholesterol levels through various mechanisms. Interest has increased in methods of reducing blood cholesterol level, because dyslipidemia is recognized as a contributory risk factor for the development of cardiovascular diseases...
May 23, 2018: Food & Function
https://www.readbyqxmd.com/read/29790240/understanding-mucosal-and-microbial-functionality-of-the-female-reproductive-tract-by-metaproteomics-implications-for-hiv-transmission
#8
Alicia R Berard, Michelle Perner, Sarah Mutch, Christina Farr Zuend, Peter McQueen, Adam D Burgener
The mucosal surface of the female genital tract contains physiological, immunological, and microbial components that collectively comprise a functioning "mucosal system" that is critical for reproductive health. Alterations or imbalances to any of these components can have significant consequences for susceptibility to sexually transmitted infections, such as HIV. In recent years the advent of advanced systems biology technologies, such as metaproteomics, has provided new toolsets to studying mucosal systems...
May 22, 2018: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/29789682/the-role-of-diet-in-the-aetiopathogenesis-of-inflammatory-bowel-disease
#9
REVIEW
Hamed Khalili, Simon S M Chan, Paul Lochhead, Ashwin N Ananthakrishnan, Andrew R Hart, Andrew T Chan
Crohn's disease and ulcerative colitis, collectively known as IBD, are chronic inflammatory disorders of the gastrointestinal tract. Although the aetiopathogenesis of IBD is largely unknown, it is widely thought that diet has a crucial role in the development and progression of IBD. Indeed, epidemiological and genetic association studies have identified a number of promising dietary and genetic risk factors for IBD. These preliminary studies have led to major interest in investigating the complex interaction between diet, host genetics, the gut microbiota and immune function in the pathogenesis of IBD...
May 22, 2018: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29789680/keystone-taxa-as-drivers-of-microbiome-structure-and-functioning
#10
REVIEW
Samiran Banerjee, Klaus Schlaeppi, Marcel G A van der Heijden
Microorganisms have a pivotal role in the functioning of ecosystems. Recent studies have shown that microbial communities harbour keystone taxa, which drive community composition and function irrespective of their abundance. In this Opinion article, we propose a definition of keystone taxa in microbial ecology and summarize over 200 microbial keystone taxa that have been identified in soil, plant and marine ecosystems, as well as in the human microbiome. We explore the importance of keystone taxa and keystone guilds for microbiome structure and functioning and discuss the factors that determine their distribution and activities...
May 22, 2018: Nature Reviews. Microbiology
https://www.readbyqxmd.com/read/29789621/taxon-specific-aerosolization-of-bacteria-and-viruses-in-an-experimental-ocean-atmosphere-mesocosm
#11
Jennifer M Michaud, Luke R Thompson, Drishti Kaul, Josh L Espinoza, R Alexander Richter, Zhenjiang Zech Xu, Christopher Lee, Kevin M Pham, Charlotte M Beall, Francesca Malfatti, Farooq Azam, Rob Knight, Michael D Burkart, Christopher L Dupont, Kimberly A Prather
Ocean-derived, airborne microbes play important roles in Earth's climate system and human health, yet little is known about factors controlling their transfer from the ocean to the atmosphere. Here, we study microbiomes of isolated sea spray aerosol (SSA) collected in a unique ocean-atmosphere facility and demonstrate taxon-specific aerosolization of bacteria and viruses. These trends are conserved within taxonomic orders and classes, and temporal variation in aerosolization is similarly shared by related taxa...
May 22, 2018: Nature Communications
https://www.readbyqxmd.com/read/29789586/paddy-upland-rotation-for-sustainable-agriculture-with-regards-to-diverse-soil-microbial-community
#12
Ping-Fu Hou, Chia-Hung Chien, Yi-Fan Chiang-Hsieh, Kuan-Chieh Tseng, Chi-Nga Chow, Hao-Jen Huang, Wen-Chi Chang
Diverse soil microbial community is determinant for sustainable agriculture. Rich microbial diversity has presumably improved soil health for economic crops to grow. In this work, the benefits of paddy-upland rotation on soil microbial diversity and specific microbes are thus intensively explored. The microbiome from multiple factor experiment (three fertilizations coupled with two rotation systems) were investigated by novel enrichment and co-occurrence analysis in a field well maintained for 25 years. Using next-generation sequencing technique, we firstly present explicit evidence that different rotation systems rather than fertilizations mightily governed the soil microbiome...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29789585/hypoxia-induces-senescence-of-bone-marrow-mesenchymal-stem-cells-via-altered-gut-microbiota
#13
Junyue Xing, Yongquan Ying, Chenxi Mao, Yiwei Liu, Tingting Wang, Qian Zhao, Xiaoling Zhang, Fuxia Yan, Hao Zhang
Systemic chronic hypoxia is a feature of many diseases and may influence the communication between bone marrow (BM) and gut microbiota. Here we analyse patients with cyanotic congenital heart disease (CCHD) who are experiencing chronic hypoxia and characterize the association between bone marrow mesenchymal stem cells (BMSCs) and gut microbiome under systemic hypoxia. We observe premature senescence of BMSCs and abnormal D-galactose accumulation in patients with CCHD. The hypoxia that these patients experience results in an altered diversity of gut microbial communities, with a remarkable decrease in the number of Lactobacilli and a noticeable reduction in the amount of enzyme-degraded D-galactose...
May 22, 2018: Nature Communications
https://www.readbyqxmd.com/read/29789574/helicobacter-pylori-infected-c57bl-6-mice-with-different-gastrointestinal-microbiota-have-contrasting-gastric-pathology-microbial-and-host-immune-responses
#14
Zhongming Ge, Alexander Sheh, Yan Feng, Sureshkumar Muthupalani, Lili Ge, Chuanwu Wang, Susanna Kurnick, Anthony Mannion, Mark T Whary, James G Fox
C57BL/6 (B6) mice from Taconic Sciences (Tac) and the Jackson Laboratory (Jax) were infected with H. pylori PMSS1 (Hp) for 16 week; there was no significant difference in the gastric histologic activity index between Hp infected Tac and Jax B6. However, the degree of gastric mucous metaplasia and Th1-associated IgG2c levels in response to Hp infection were increased in Tac mice over Jax mice, whereas the colonization levels of gastric Hp were higher by 8-fold in Jax B6 compared with Tac B6. Additionally, mRNA expression of gastric Il-1β, Il-17A and RegIIIγ were significantly lower in the infected Tac compared to the infected Jax mice...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29789525/fertilization-shapes-a-well-organized-community-of-bacterial-decomposers-for-accelerated-paddy-straw-degradation
#15
Yushan Zhan, Wenjing Liu, Yuanyuan Bao, Jianwei Zhang, Evangelos Petropoulos, Zhongpei Li, Xiangui Lin, Youzhi Feng
Straw, mainly dry stalks of crops, is an agricultural byproduct. Its incorporation to soils via microbial redistribution is an environment-friendly way to increase fertility. Fertilization influences soil microorganisms and straw degradation. However, our up to date knowledge on the responses of the straw decomposers to fertilization remains elusive. To this end, inoculated with paddy soils with 26-year applications of chemical fertilizers, organic amendments or controls without fertilization, microcosms were anoxically incubated with 13 C-labelled rice straw amendment...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29789388/tissue-resident-macrophages-in-the-intestine-are-long-lived-and-defined-by-tim-4-and-cd4-expression
#16
Tovah N Shaw, Stephanie A Houston, Kelly Wemyss, Hayley M Bridgeman, Thomas A Barbera, Tamsin Zangerle-Murray, Patrick Strangward, Amanda J L Ridley, Ping Wang, Samira Tamoutounour, Judith E Allen, Joanne E Konkel, John R Grainger
A defining feature of resident gut macrophages is their high replenishment rate from blood monocytes attributed to tonic commensal stimulation of this site. In contrast, almost all other tissues contain locally maintained macrophage populations, which coexist with monocyte-replenished cells at homeostasis. In this study, we identified three transcriptionally distinct mouse gut macrophage subsets that segregate based on expression of Tim-4 and CD4. Challenging current understanding, Tim-4+ CD4+ gut macrophages were found to be locally maintained, while Tim-4- CD4+ macrophages had a slow turnover from blood monocytes; indeed, Tim-4- CD4- macrophages were the only subset with the high monocyte-replenishment rate currently attributed to gut macrophages...
May 22, 2018: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29789323/the-emerging-connections-between-igf1-the-intestinal-microbiome-lactobacillus-strains-and-bone-growth
#17
REVIEW
Pierre Poinsot, Martin Schwarzer, Noël Peretti, François Leulier
In most animal species, postnatal growth is controlled by conserved insulin/insulin-like growth factor (IGF) signaling. In mammals, juvenile growth is characterized by a longitudinal bone growth resulting from the ossification of the growth plate. This ossification is under IGF1 influence through endocrine and paracrine mechanisms. Moreover, the nutritional status has been largely described as an important factor influencing the insulin/insulin-like growth factor signaling. It is now well established that the gut microbiota modulates the nutrient availability of its host...
July 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29789277/applicability-of-a-web-based-individualized-exercise-intervention-in-patients-with-liver-disease-cystic-fibrosis-esophageal-cancer-and-psychiatric-disorders-process-evaluation-of-4-ongoing-clinical-trials
#18
Daniel Pfirrmann, Nils Haller, Yvonne Huber, Patrick Jung, Klaus Lieb, Ines Gockel, Krystyna Poplawska, Jörn Markus Schattenberg, Perikles Simon
BACKGROUND: In the primary and secondary prevention of civilization diseases, regular physical activity is recommended in international guidelines to improve disease-related symptoms, delay the progression of the disease, or to enhance postoperative outcomes. In the preoperative context, there has been a paradigm shift in favor of using preconditioning concepts before surgery. Web-based interventions seem an innovative and effective tool for delivering general information, individualized exercise recommendations, and peer support...
May 22, 2018: JMIR Research Protocols
https://www.readbyqxmd.com/read/29789027/ethanolamine-enhances-intestinal-functions-by-altering-gut-microbiome-and-mucosal-anti-stress-capacity-in-weaned-rats
#19
Jian Zhou, Xia Xiong, Ke-Xing Wang, Li-Jun Zou, Peng Ji, Yu-Long Yin
Ethanolamine (Etn) contained in milk is the base constituent of phosphatidylethanolamine and is required for the proliferation of intestinal epithelial cells and bacteria, which is important for maintenance of the gut microbiome and intestinal development. The present study investigated the effect of Etn on intestinal function and microbiome using 21-d-old Sprague-Dawley rats treated with 0, 250, 500 and 1000 μm Etn in drinking water for 2 weeks immediately after weaning. Growth performance, intestinal morphology, antioxidant capacity and mucosal immunity, as well as gut microbiota community composition, were evaluated...
May 23, 2018: British Journal of Nutrition
https://www.readbyqxmd.com/read/29789023/iron-supplementation-has-minor-effects-on-gut-microbiota-composition-in-overweight-and-obese-women-in-early-pregnancy
#20
Marloes Dekker Nitert, Luisa F Gomez-Arango, Helen L Barrett, H David McIntyre, Gregory J Anderson, David M Frazer, Leonie K Callaway
Fe is an essential nutrient for many bacteria, and Fe supplementation has been reported to affect the composition of the gut microbiota in both Fe-deficient and Fe-replete individuals outside pregnancy. This study examined whether the dose of Fe in pregnancy multivitamin supplements affects the overall composition of the gut microbiota in overweight and obese pregnant women in early pregnancy. Women participating in the SPRING study with a faecal sample obtained at 16 weeks' gestation were included in this substudy...
May 23, 2018: British Journal of Nutrition
keyword
keyword
93592
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"