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https://www.readbyqxmd.com/read/28634640/the-microbiome-of-eucalyptus-roots-under-different-management-conditions-and-its-potential-for-biological-nitrogen-fixation
#1
Eduardo da Siva Fonseca, Raquel Silva Peixoto, Alexandre Soares Rosado, Fabiano de Carvalho Balieiro, James M Tiedje, Caio Tavora Coelho da Costa Rachid
Eucalyptus plantations offer a cost-effective and renewable source of raw material. There is substantial interest in improving forestry production, especially through sustainable strategies such as the use of plant growth-promoting bacteria. However, little is known about Eucalyptus microbiology. In this study, the endophytic bacterial community was assessed in Eucalyptus urograndis roots using culture-dependent and culture-independent techniques with plants grown under different conditions. Three phyla accounted for approximately 95% of the community, with Actinobacteria corresponding to approximately 59%...
June 21, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28634475/cesarean-or-vaginal-birth-does-not-impact-the-longitudinal-development-of-the-gut-microbiome-in-a-cohort-of-exclusively-preterm-infants
#2
Christopher J Stewart, Nicholas D Embleton, Elizabeth Clements, Pamela N Luna, Daniel P Smith, Tatiana Y Fofanova, Andrew Nelson, Gillian Taylor, Caroline H Orr, Joseph F Petrosino, Janet E Berrington, Stephen P Cummings
The short and long-term impact of birth mode on the developing gut microbiome in neonates has potential implications for the health of infants. In term infants, the microbiome immediately following birth across multiple body sites corresponds to birth mode, with increased Bacteroides in vaginally delivered infants. We aimed to determine the impact of birth mode of the preterm gut microbiome over the first 100 days of life and following neonatal intensive care unit (NICU) discharge. In total, 867 stool samples from 46 preterm infants (21 cesarean and 25 vaginal), median gestational age 27 weeks, were sequenced (V4 region 16S rRNA gene, Illumina MiSeq)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28633955/the-microbiome-and-transfusion-in-cancer-patients
#3
REVIEW
Hadi Goubran, Jerard Seghatchian, Julia Radosevic, Gaafar Ragab, Thierry Burnouf
Our microbiota is determined by many variables including ABO blood groups. The microbiota is not only confined to the gut and skin but is also recoverable from blood of healthy donors. The microbiota shape our immune system through cross reactivity with antigens, the expression of direct molecular patterns, the release of cytokines, the effects on nutrients and micronutrients and even through an interplay with epigenetics. It is likely, therefore, that a donor's microbiota could alter the antigenicity of blood and its components and potentially contribute to transfusion-related immune modulation [TRIM]...
June 3, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28633864/perinatal-group-b-streptococcal-infections-virulence-factors-immunity-and-prevention-strategies
#4
REVIEW
Jay Vornhagen, Kristina M Adams Waldorf, Lakshmi Rajagopal
Group B streptococcus (GBS) or Streptococcus agalactiae is a β-hemolytic, Gram-positive bacterium that is a leading cause of neonatal infections. GBS commonly colonizes the lower gastrointestinal and genital tracts and, during pregnancy, neonates are at risk of infection. Although intrapartum antibiotic prophylaxis during labor and delivery has decreased the incidence of early-onset neonatal infection, these measures do not prevent ascending infection that can occur earlier in pregnancy leading to preterm births, stillbirths, or late-onset neonatal infections...
June 17, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/28633443/nod2-genetic-variants-predispose-one-of-two-familial-adenomatous-polyposis-siblings-to-pouchitis-through-microbiome-dysbiosis
#5
Kathleen M Schieffer, Justin R Wright, Leonard R Harris, Sue Deiling, Zhaohai Yang, Regina Lamendella, Gregory S Yochum, Walter A Koltun
Background and Aims: Individuals with familial adenomatous polyposis (FAP) may undergo a total proctocolectomy with ileal pouch-anal anastomosis (IPAA) to surgically treat their disease. Inflammation of the ileal pouch, termed pouchitis, is uncommon in FAP patients but prevalent in patients who received IPAA for ulcerative colitis, a type of inflammatory bowel disease (IBD). Methods and Results: We report on two FAP siblings, living in the same household, who underwent IPAA surgery within one week of each other...
June 19, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28632934/a-prospective-microbiome-wide-association-study-of-food-sensitization-and-food-allergy-in-early-childhood
#6
Jessica H Savage, Kathleen A Lee-Sarwar, Joanne Sordillo, Supinda Bunyavanich, Yanjiao Zhou, George O'Connor, Megan Sandel, Leonard Bacharier, Robert Zeiger, Erica Sodergren, George M Weinstock, Diane R Gold, Scott T Weiss, Augusto A Litonjua
BACKGROUND: Alterations in the intestinal microbiome are prospectively associated with the development of asthma; less is known regarding the role of microbiome alterations in food allergy development. METHODS: Intestinal microbiome samples were collected at age 3-6 months in children participating in the follow-up phase of an interventional trial of high dose Vitamin D given during pregnancy. At age 3, sensitization to foods (milk, egg, peanut, soy, wheat, walnut) was assessed...
June 20, 2017: Allergy
https://www.readbyqxmd.com/read/28632755/potassium-is-a-key-signal-in-host-microbiome-dysbiosis-in-periodontitis
#7
Susan Yost, Ana E Duran-Pinedo, Keerthana Krishnan, Jorge Frias-Lopez
Dysbiosis, or the imbalance in the structural and/or functional properties of the microbiome, is at the origin of important infectious inflammatory diseases such as inflammatory bowel disease (IBD) and periodontal disease. Periodontitis is a polymicrobial inflammatory disease that affects a large proportion of the world's population and has been associated with a wide variety of systemic health conditions, such as diabetes, cardiovascular and respiratory diseases. Dysbiosis has been identified as a key element in the development of the disease...
June 20, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28632732/fructo-oligosaccharides-and-intestinal-barrier-function-in-a-methionine-choline-deficient-mouse-model-of-nonalcoholic-steatohepatitis
#8
Kotaro Matsumoto, Mayuko Ichimura, Koichi Tsuneyama, Yuki Moritoki, Hiromichi Tsunashima, Katsuhisa Omagari, Masumi Hara, Ichiro Yasuda, Hiroshi Miyakawa, Kentaro Kikuchi
Impairments in intestinal barrier function, epithelial mucins, and tight junction proteins have been reported to be associated with nonalcoholic steatohepatitis. Prebiotic fructo-oligosaccharides restore balance in the gastrointestinal microbiome. This study was conducted to determine the effects of dietary fructo-oligosaccharides on intestinal barrier function and steatohepatitis in methionine-choline-deficient mice. Three groups of 12-week-old male C57BL/6J mice were studied for 3 weeks; specifically, mice were fed a methionine-choline-deficient diet, a methionine-choline-deficient diet plus 5% fructo-oligosaccharides in water, or a normal control diet...
2017: PloS One
https://www.readbyqxmd.com/read/28632016/the-bacteroides-fragilis-pathogenicity-island-links-virulence-and-strain-competition
#9
Benjamin W Casterline, Aaron L Hecht, Vivian M Choi, Juliane Bubeck Wardenburg
The mature microbiome is a stable ecosystem that resists perturbation despite constant host exposure to exogenous microbes. However, the microbial mechanisms determining microbiome development and composition are poorly understood. We recently demonstrated that a non-toxigenic B. fragilis (NTBF) strain restricts enteric colonization by an enterotoxigenic (ETBF) strain dependent on a type VI secretion system (T6SS). We show here that a second enterotoxigenic strain is competent to colonize, dependent on the Bacteroides fragilis pathogenicity island (BFPAI)...
February 23, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28631353/microbiome-dynamics-in-early-life-stages-of-the-scleractinian-coral-acropora-gemmifera-in-response-to-elevated-pco2
#10
Guowei Zhou, Lin Cai, Tao Yuan, Renmao Tian, Haoya Tong, Weipeng Zhang, Lei Jiang, Minglan Guo, Sheng Liu, Pei-Yuan Qian, Hui Huang
Reef-building coral is a complex holobiont, harbouring diverse microorganisms that play essential roles in maintaining coral health. However, microbiome development in early life stages of coral remains poorly understood. Here, microbiomes of Acropora gemmifera were analysed during spawning and early developmental stages, and also under different seawater partial pressure of CO2 (pCO2 ) conditions, using amplicon sequencing of 16S rRNA gene for bacteria and archaea and of ITS2 for Symbiodinium. No remarkable microbiome shift was observed in adults before and after spawning...
June 19, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28631214/identification-of-bufadienolides-from-the-boreal-toad-anaxyrus-boreas-active-against-a-fungal-pathogen
#11
Kelly Barnhart, Megan E Forman, Thomas P Umile, Jordan Kueneman, Valerie McKenzie, Irene Salinas, Kevin P C Minbiole, Douglas C Woodhams
Amphibian granular glands provide a wide range of compounds on the skin that defend against pathogens and predators. We identified three bufadienolides-the steroid-like compounds arenobufagin, gamabufotalin, and telocinobufagin-from the boreal toad, Anaxyrus boreas, through liquid chromatography mass spectrometry (LC/MS). Compounds were detected both after inducing skin gland secretions and in constitutive mucosal rinses from toads. We described the antimicrobial properties of each bufadienolide against Batrachochytrium dendrobatidis (Bd), an amphibian fungal pathogen linked with boreal toad population declines...
June 19, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28631091/the-role-of-microbiota-and-probiotics-and-prebiotics-in-skin-health
#12
Mia Maguire, Greg Maguire
During the past decade, scientists have made great strides in understanding the microbiome's role in human health. Today, the microbiome has become key in scientific research, therapeutic development, medical treatment, and as a news feature in the media. Most studies have focused on the microbiome of our gut, but recently researchers have turned their attention to other microbiomes, including that of the skin. These studies of gut and skin microbiomes are yielding very informative results, new treatment strategies, and the development of new prebiotic and probiotic products for the treatment of many skin conditions...
June 19, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28630614/a-plant-based-diet-for-the-prevention-and-treatment-of-type-2-diabetes
#13
REVIEW
Michelle McMacken, Sapana Shah
The prevalence of type 2 diabetes is rising worldwide, especially in older adults. Diet and lifestyle, particularly plant-based diets, are effective tools for type 2 diabetes prevention and management. Plant-based diets are eating patterns that emphasize legumes, whole grains, vegetables, fruits, nuts, and seeds and discourage most or all animal products. Cohort studies strongly support the role of plant-based diets, and food and nutrient components of plant-based diets, in reducing the risk of type 2 diabetes...
May 2017: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/28630195/topical-antimicrobial-treatments-can-elicit-shifts-to-resident-skin-bacterial-communities-and-reduce-colonization-by-staphylococcus-aureus-competitors
#14
Adam J SanMiguel, Jacquelyn S Meisel, Joseph Horwinski, Qi Zheng, Elizabeth A Grice
The skin microbiome is a complex ecosystem with important implications for cutaneous health and disease. Topical antibiotics and antiseptics are often employed to preserve the balance of this population, and inhibit colonization by more pathogenic bacteria. Despite their widespread use, however, the impact of these interventions on broader microbial communities remains poorly understood. Here we report the longitudinal effects of topical antibiotics and antiseptics on skin bacterial communities and their role in Staphylococcus aureus colonization resistance...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28629758/implications-of-the-gut-microbiota-in-vulnerability-to-the-social-avoidance-effects-of-chronic-social-defeat-in-male-mice
#15
Joanna Kasia Szyszkowicz, Alex Wong, Hymie Anisman, Zul Merali, Marie-Claude Audet
Appreciable evidence suggests that perturbations within the gut microbiome and the immune system may play a key role in the pathogenesis of depression stemming from earlier stressful experiences. In the present investigation we examined whether microbial changes in cecum contents were associated with social avoidance behaviors, a feature of depression, and pro-inflammatory variations among socially stressed mice. Male C57BL/6 mice experienced social defeat or a control condition once a day for 10 consecutive days...
June 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28628622/urinary-catheter-associated-microbiota-change-in-accordance-with-treatment-and-infection-status
#16
Laetitia Bossa, Kimberly Kline, Diane McDougald, Bonsan Bonne Lee, Scott A Rice
The use of long-term catheterisation to manage insensate bladders, often associated with spinal cord injury (SCI), increases the risk of microbial colonisation and infection of the urinary tract. Urinary tract infection (UTI) is typically diagnosed and treated based on the culturing of organisms from the urine, although this approach overlooks low titer, slow growing and non-traditional pathogens. Here, we present an investigation of the urinary tract microbiome in catheterised SCI individuals, using T-RFLP and metagenomic sequencing of the microbial community...
2017: PloS One
https://www.readbyqxmd.com/read/28628375/integrating-microbiome-and-metabolome-data-to-understand-infectious-airway-disease
#17
Robert A Quinn
n/a.
June 19, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28628333/coupling-targeted-and-untargeted-mass-spectrometry-for-metabolome-microbiome-wide-association-studies-of-human-fecal-samples
#18
Alexey V Melnik, Pieter C Dorrestein, Ricardo R da Silva, Embriette R Hyde, Alexander A Aksenov, Fernando Vargas, Amina Bouslimani, Ivan Protsyuk, Alan Jarmusch, Anupriya Tripathi, Theodore Alexandrov, Rob Knight
Increasing appreciation of the gut microbiome's role in health motivates understanding the molecular composition of human feces. To analyze such complex samples, we developed a platform coupling targeted and untargeted metabolomics. The approach is facilitated through split flow from one UPLC, joint timing triggered by contact closure relays and a script to retrieve the data. It is designed to detect specific metabolites of interest with high sensitivity, allows for correction of targeted information, enables better quantitation thus providing an advanced analytical tool for exploratory studies...
June 19, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28628112/gut-microbiome-and-serum-metabolome-alterations-in-obesity-and-after-weight-loss-intervention
#19
Ruixin Liu, Jie Hong, Xiaoqiang Xu, Qiang Feng, Dongya Zhang, Yanyun Gu, Juan Shi, Shaoqian Zhao, Wen Liu, Xiaokai Wang, Huihua Xia, Zhipeng Liu, Bin Cui, Peiwen Liang, Liuqing Xi, Jiabin Jin, Xiayang Ying, Xiaolin Wang, Xinjie Zhao, Wanyu Li, Huijue Jia, Zhou Lan, Fengyu Li, Rui Wang, Yingkai Sun, Minglan Yang, Yuxin Shen, Zhuye Jie, Junhua Li, Xiaomin Chen, Huanzi Zhong, Hailiang Xie, Yifei Zhang, Weiqiong Gu, Xiaxing Deng, Baiyong Shen, Xun Xu, Huanming Yang, Guowang Xu, Yufang Bi, Shenghan Lai, Jian Wang, Lu Qi, Lise Madsen, Jiqiu Wang, Guang Ning, Karsten Kristiansen, Weiqing Wang
Emerging evidence has linked the gut microbiome to human obesity. We performed a metagenome-wide association study and serum metabolomics profiling in a cohort of lean and obese, young, Chinese individuals. We identified obesity-associated gut microbial species linked to changes in circulating metabolites. The abundance of Bacteroides thetaiotaomicron, a glutamate-fermenting commensal, was markedly decreased in obese individuals and was inversely correlated with serum glutamate concentration. Consistently, gavage with B...
June 19, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28627361/incorporating-the-airway-microbiome-into-asthma-phenotyping-moving-towards-personalized-medicine-for-non-eosinophilic-asthma
#20
EDITORIAL
J Durack, H A Boushey, Y J Huang
No abstract text is available yet for this article.
June 13, 2017: Journal of Allergy and Clinical Immunology
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