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https://www.readbyqxmd.com/read/29346623/a-large-scale-field-study-of-bacterial-communities-in-cereal-aphid-populations-across-morocco
#1
Samir Fakhour, Jérôme Ambroise, François Renoz, Vincent Foray, Jean-Luc Gala, Thierry Hance
Insects are frequently associated with bacteria that can have significant ecological and evolutionary impacts on their hosts. To date, few studies have examined the influence of environmental factors to microbiome composition of aphids. The current work assessed the diversity of bacterial communities of five cereal aphid species (Sitobion avenae, Rhopalosiphum padi, R. maidis, Sipha maydis and Diuraphis noxia) collected across Morocco and covering a wide range of environmental conditions. We aimed to test whether symbiont combinations are host or environment specific...
January 16, 2018: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29346509/a-distance-based-approach-for-testing-the-mediation-effect-of-the-human-microbiome
#2
Jie Zhang, Zhi Wei, Jun Chen
Motivation: Recent studies have revealed a complex interplay between environment, the human microbiome, and health and disease. Mediation analysis of the human microbiome in these complex relationships could potentially provide insights into the role of the microbiome in the etiology of disease and, more importantly, lead to novel clinical interventions by modulating the microbiome. However, due to the high dimensionality, sparsity, non-normality and phylogenetic structure of microbiome data, none of the existing methods are suitable for testing such clinically important mediation effect...
January 15, 2018: Bioinformatics
https://www.readbyqxmd.com/read/29346438/colonization-of-the-cervicovaginal-space-with-gardnerella-vaginalis-leads-to-local-inflammation-and-cervical-remodeling-in-pregnant-mice
#3
Luz-Jeannette Sierra, Amy G Brown, Guillermo O Barilá, Lauren Anton, Carrie E Barnum, Snehal S Shetye, Louis J Soslowsky, Michal A Elovitz
The role of the cervicovaginal (CV) microbiome in regulating cervical function during pregnancy is poorly understood. Gardnerella vaginalis (G. vaginalis) is the most common bacteria associated with the diagnosis of bacterial vaginosis (BV). While BV has been associated with preterm birth (PTB), clinical trials targeting BV do not decrease PTB rates. It remains unknown if G. vaginalis is capable of triggering molecular, biomechanical and cellular events that could lead to PTB. The objective of this study was to determine if cervicovaginal colonization with G...
2018: PloS One
https://www.readbyqxmd.com/read/29346420/initial-acquisition-and-succession-of-the-cystic-fibrosis-lung-microbiome-is-associated-with-disease-progression-in-infants-and-preschool-children
#4
Marianne S Muhlebach, Bryan T Zorn, Charles R Esther, Joseph E Hatch, Conor P Murray, Lidija Turkovic, Sarath C Ranganathan, Richard C Boucher, Stephen M Stick, Matthew C Wolfgang
The cystic fibrosis (CF) lung microbiome has been studied in children and adults; however, little is known about its relationship to early disease progression. To better understand the relationship between the lung microbiome and early respiratory disease, we characterized the lower airways microbiome using bronchoalveolar lavage (BAL) samples obtained from clinically stable CF infants and preschoolers who underwent bronchoscopy and chest computed tomography (CT). Cross-sectional samples suggested a progression of the lower airways microbiome with age, beginning with relatively sterile airways in infancy...
January 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29345635/genetic-risk-dysbiosis-and-treatment-stratification-using-host-genome-and-gut-microbiome-in-inflammatory-bowel-disease
#5
Ahmed Moustafa, Weizhong Li, Ericka L Anderson, Emily H M Wong, Parambir S Dulai, William J Sandborn, William Biggs, Shibu Yooseph, Marcus B Jones, J Craig Venter, Karen E Nelson, John T Chang, Amalio Telenti, Brigid S Boland
OBJECTIVES: Inflammatory bowel diseases (IBD), comprised of Crohn's disease (CD) and ulcerative colitis (UC), are characterized by a complex pathophysiology that is thought to result from an aberrant immune response to a dysbiotic luminal microbiota in genetically susceptible individuals. New technologies support the joint assessment of host-microbiome interaction. METHODS: Using whole genome sequencing and shotgun metagenomics, we studied the clinical features, host genome, and stool microbial metagenome of 85 IBD patients, and compared the results to 146 control individuals...
January 18, 2018: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/29345366/interactions-between-the-microbiota-and-innate-and-innate-like-lymphocytes
#6
REVIEW
Michael G Constantinides
The microbiota, which consists of commensal bacteria, fungi, and viruses, limits the colonization of pathogens at barrier tissues and promotes immune homeostasis. The latter is accomplished through the induction and regulation of both innate and adaptive immune responses. Innate lymphocytes, which include the type-1 innate lymphoid cell (ILC1), NK cell, type-2 innate lymphoid cell (ILC2), type-3 innate lymphoid cell (ILC3), and lymphoid tissue inducer (LTi) cell populations, and innate-like lymphocytes, such as NKT cells, mucosal-associated invariant T (MAIT) cells, and γδ T cells, are uniquely capable of responding to the microbiota due to their tissue localization and rapid primary responses...
December 20, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29345309/microbial-mitigation-exacerbation-continuum-a-novel-framework-for-microbiome-effects-on-hosts-in-the-face-of-stress
#7
Aaron S David, Khum B Thapa-Magar, Michelle E Afkhami
A key challenge to understanding microbiomes and their role in ecological processes is contextualizing their effects on host organisms, particularly when faced with environmental stress. One influential theory, the Stress Gradient Hypothesis, might predict that the frequency of positive interactions increases with stressful conditions such that microbial taxa would mitigate harmful effects on host performance. Yet, equally plausible is that microbial taxa could exacerbate these effects. Here, we introduce the "Mitigation-Exacerbation Continuum" as a novel framework to conceptualize microbial mediation of stress...
January 18, 2018: Ecology
https://www.readbyqxmd.com/read/29344612/association-of-disease-severity-with-skin-microbiome-and-filaggrin-gene-mutations-in-adult-atopic-dermatitis
#8
Maja-Lisa Clausen, Tove Agner, Berit Lilje, Sofie M Edslev, Thor Bech Johannesen, Paal Skytt Andersen
Importance: Skin microbiome correlates with disease severity for lesional and nonlesional skin, indicating a global influence of atopic dermatitis (AD). A relation between skin microbiome and filaggrin gene (FLG) mutations proposes a possible association between skin microbiome and host genetics. Objectives: To assess skin and nasal microbiome diversity and composition in patients with AD and compare with healthy controls, and to investigate the microbiome in relation to disease severity and FLG mutations in patients with AD...
January 17, 2018: JAMA Dermatology
https://www.readbyqxmd.com/read/29343276/the-antihyperlipidemic-effects-of-fullerenol-nanoparticles-via-adjusting-the-gut-microbiota-in-vivo
#9
Juan Li, Runhong Lei, Xin Li, Fengxia Xiong, Quanyang Zhang, Yue Zhou, Shengmei Yang, Yanan Chang, Kui Chen, Weihong Gu, Chongming Wu, Gengmei Xing
BACKGROUND: Nanoparticles (NPs) administered orally will meet the gut microbiota, but their impacts on microbiota homeostasis and the consequent physiological relevance remain largely unknown. Here, we describe the modulatory effects and the consequent pharmacological outputs of two orally administered fullerenols NPs (Fol1 C60(OH)7(O)8 and Fol113 C60(OH)11(O)6) on gut microbiota. RESULTS: Administration of Fol1 and Fol113 NPs for 4 weeks largely shifted the overall structure of gut microbiota in mice...
January 17, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29342144/erratum-moving-beyond-microbiome-wide-associations-to-causal-microbe-identification
#10
Neeraj K Surana, Dennis L Kasper
This corrects the article DOI: 10.1038/nature25019.
January 17, 2018: Nature
https://www.readbyqxmd.com/read/29341956/microbiome-associated-with-denture-malodour
#11
S Yitzhaki, L Reshef, U Gophna, M Rosenberg, N Sterer
In the past, our inability to cultivate most of the oral microorganisms has limited our view of this complex ecosystem. In the present study, we utilized next generation deep sequencing techniques to revisit the microbiome associated with denture malodour, a growing field with the rise in life expectancy. The study population comprised 26 full dentures patients (mean age 71 ± 6.4, 10 males, 16 females) who visited the Tel Aviv University dental geriatric clinic. Denture malodour was rated organoleptically by a single odour judge, and dentures scoring 2 and above were considered malodour positive...
January 17, 2018: Journal of Breath Research
https://www.readbyqxmd.com/read/29341867/genetic-and-microbiome-influence-on-lipid-metabolism-and-dyslipidemia
#12
Maria Matey Hernandez, Frances Mk Mk Williams, Tilly Potter, Ana M Valdes, Tim Spector, Cristina Menni
Disruption in the metabolism of lipids is broadly classified under dyslipidemias and relate to the concentration of lipids in the blood. Dyslipidemia is a predictor of cardio-metabolic disease including obesity. Traditionally, the large inter-individual variation has been related to genetic factors and diet. Genome-wide association studies have identified over 150 loci related to abnormal lipid levels, explaining approximately 40% of the total variation. Part of the unexplained variance has been attributed to environmental factors including diet, but the extent of the dietary contribution remains unquantified...
December 20, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/29341791/population-level-evidence-for-seasonality-of-the-human-microbiome
#13
Christina Korownyk, Fangwei Liu, Scott Garrison
The objective of this study is to determine whether human body odors undergo seasonal modulation. We utilized google trends search volume from the United States of America from January 1, 2010 to June 24, 2017 for a number of predetermined body odors. Regression modeling of time series data was completed. Our primary outcome was to determine the proportion of the variability in Internet searches for each unpleasant odor (about the mean) that is explained by a seasonal model. We determined that the seasonal (sinusoidal) model provided a significantly better fit than the null model (best straight line fit) for all searches relating to human body odors (P <...
January 17, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29341448/beneficial-actions-of-microbiota-derived-tryptophan-metabolites
#14
REVIEW
J J Galligan
Tryptophan is an important dietary amino acid and it is the precursor for 5-hydroxytryptamine synthesis in the nervous system and by enterochromaffin cells in the gut mucosa. Tryptophan is also metabolized by enzymes in the gut mucosa and also by enzymes produced by the gut microbiome. Diet and the microbiome can contribute to metabolic disease in part by causing intestinal inflammation and increased permeability. In this issue of Neurogastroenterology and Motility, Jennis et al. test the hypothesis that indole tryptophan metabolites produced by gut bacteria might be responsible for the anti-inflammatory and beneficial metabolic effects of the gut microbiome and Roux-en-Y gastric bypass surgery for weight loss by obese patients...
February 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29341151/gut-microbiome-influences-on-anastomotic-leak-and-recurrence-rates-following-colorectal-cancer-surgery
#15
REVIEW
S Gaines, C Shao, N Hyman, J C Alverdy
BACKGROUND: The pathogenesis of colorectal cancer recurrence after a curative resection remains poorly understood. A yet-to-be accounted for variable is the composition and function of the microbiome adjacent to the tumour and its influence on the margins of resection following surgery. METHODS: PubMed was searched for historical as well as current manuscripts dated between 1970 and 2017 using the following keywords: 'colorectal cancer recurrence', 'microbiome', 'anastomotic leak', 'anastomotic failure' and 'mechanical bowel preparation'...
January 2018: British Journal of Surgery
https://www.readbyqxmd.com/read/29341130/mitochondrial-function-and-autophagy-integrating-proteotoxic-redox-and-metabolic-stress-in-parkinson-s-disease
#16
REVIEW
Jianhua Zhang, M Lillian Culp, Jason G Craver, Victor Darley-Usmar
Parkinson's disease (PD) is a movement disorder with widespread neurodegeneration in the brain. Significant oxidative, reductive, metabolic, and proteotoxic alterations have been observed in PD postmortem brains. The alterations of mitochondrial function resulting in decreased bioenergetic health is important and needs to be further examined to help develop biomarkers for PD severity and prognosis. It is now becoming clear that multiple hits on metabolic and signaling pathways are likely to exacerbate PD pathogenesis...
January 17, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29340930/the-microbiome-and-neurologic-disease-past-and-future-of-a-2-way-interaction
#17
EDITORIAL
Javier Ochoa-Repáraz, Lloyd H Kasper
No abstract text is available yet for this article.
January 16, 2018: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/29340928/microbiota-signaling-pathways-that-influence-neurologic-disease
#18
REVIEW
Laura M Cox, Howard L Weiner
Though seemingly distinct and autonomous, emerging evidence suggests there is a bidirectional interaction between the intestinal microbiota and the brain. This crosstalk may play a substantial role in neurologic diseases, including anxiety, depression, autism, multiple sclerosis, Parkinson's disease, and, potentially, Alzheimer's disease. Long hypothesized by Metchnikoff and others well over 100 years ago, investigations into the mind-microbe axis is now seeing a rapid resurgence of research. If specific pathways and mechanisms of interaction are understood, it could have broad therapeutic potential, as the microbiome is environmentally acquired and can be modified to promote health...
January 16, 2018: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/29340588/antimicrobial-resistant-klebsiella-pneumoniae-carriage-and-infection-in-specialized-geriatric-care-wards-linked-to-acquisition-in-the-referring-hospital
#19
Claire L Gorrie, Mirjana Mirceta, Ryan R Wick, Louise M Judd, Kelly L Wyres, Nicholas R Thomson, Richard A Strugnell, Nigel F Pratt, Jill S Garlick, Kerrie M Watson, Peter C Hunter, Steve A McGloughlin, Denis W Spelman, Adam W J Jenney, Kathryn E Holt
Background: Klebsiella pneumoniae is a leading cause of extended-spectrum beta-lactamase (ESBL) producing hospital-associated infections, for which elderly patients are at increased risk. Methods: We conducted a 1-year prospective cohort study, in which a third of patients admitted to two geriatric wards in a specialized hospital were recruited and screened for carriage of K. pneumoniae by microbiological culture. Clinical isolates were monitored via the hospital laboratory...
January 11, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29340331/location-specific-oral-microbiome-possesses-features-associated-with-ckd
#20
Jianzhong Hu, Srinivas Iragavarapu, Girish N Nadkarni, Ruiqi Huang, Monica Erazo, Xiuliang Bao, Divya Verghese, Steven Coca, Mairaj K Ahmed, Inga Peter
Introduction: Chronic kidney disease (CKD), a progressive loss of renal function, can lead to serious complications if underdiagnosed. Many studies suggest that the oral microbiota plays important role in the health of the host; however, little is known about the association between the oral microbiota and CKD pathogenesis. Methods: In this study, we surveyed the oral microbiota in saliva, the left and right molars, and the anterior mandibular lingual area from 77 participants (18 with and 59 without CKD), and tested their association with CKD to identify microbial features that may be predictive of CKD status...
January 2018: KI Reports
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