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https://www.readbyqxmd.com/read/27913470/role-of-the-intestinal-mucosa-in-acute-gastrointestinal-gvhd
#1
Jonathan U Peled, Alan M Hanash, Robert R Jenq
Intestinal graft-versus-host disease (GVHD) remains a significant obstacle to the success of allogeneic hematopoietic cell transplantation. The intestinal mucosa comprises the inner lining of the intestinal tract and maintains close proximity with commensal microbes that reside within the intestinal lumen. Recent advances have significantly improved our understanding of the interactions between the intestinal mucosa and the enteric microbiota. Changes in host mucosal tissue and commensals posttransplant have been actively investigated, and provocative insights into mucosal immunity and the enteric microbiota are now being translated into clinical trials of novel approaches for preventing and treating acute GVHD...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27912759/intestinal-dysbiosis-and-allogeneic-hematopoietic-progenitor-cell-transplantation
#2
REVIEW
Vikram M Raghunathan, Iris Sheng, Seah H Lim
The intestinal microbiota is a diverse and dynamic ecosystem that is increasingly understood to play a vital role in human health. Hematopoietic stem cell transplant recipients undergo prolonged exposure to antimicrobials, chemotherapeutic agents, and immunosuppressants, resulting in profound shifts in the gut microbiome. A growing body of research has revealed the ways in which these microbiologic shifts shape immune modulation, affecting susceptibility to infections and graft-versus-host disease, the two major post-transplant complications in this population...
December 3, 2016: Journal of Translational Medicine
https://www.readbyqxmd.com/read/27912057/gut-microbiota-regulate-motor-deficits-and-neuroinflammation-in-a-model-of-parkinson-s-disease
#3
Timothy R Sampson, Justine W Debelius, Taren Thron, Stefan Janssen, Gauri G Shastri, Zehra Esra Ilhan, Collin Challis, Catherine E Schretter, Sandra Rocha, Viviana Gradinaru, Marie-Francoise Chesselet, Ali Keshavarzian, Kathleen M Shannon, Rosa Krajmalnik-Brown, Pernilla Wittung-Stafshede, Rob Knight, Sarkis K Mazmanian
The intestinal microbiota influence neurodevelopment, modulate behavior, and contribute to neurological disorders. However, a functional link between gut bacteria and neurodegenerative diseases remains unexplored. Synucleinopathies are characterized by aggregation of the protein α-synuclein (αSyn), often resulting in motor dysfunction as exemplified by Parkinson's disease (PD). Using mice that overexpress αSyn, we report herein that gut microbiota are required for motor deficits, microglia activation, and αSyn pathology...
December 1, 2016: Cell
https://www.readbyqxmd.com/read/27893543/changes-in-intestinal-microbiota-following-combination-therapy-with-fecal-microbial-transplantation-and-antibiotics-for-ulcerative-colitis
#4
Dai Ishikawa, Takashi Sasaki, Taro Osada, Kyoko Kuwahara-Arai, Keiichi Haga, Tomoyoshi Shibuya, Keiichi Hiramatsu, Sumio Watanabe
BACKGROUND: Fecal microbiota transplantation (FMT) is a potential therapeutic approach to restore normal intestinal microbiota in patients with ulcerative colitis (UC), which is associated with dysbiosis; however, treatment efficacy remains unclear. Hence, we studied the impact of antibiotic pretreatment with amoxicillin, fosfomycin, and metronidazole (AFM therapy) and FMT versus AFM alone. METHODS: AFM therapy was administered to patients for 2 weeks until 2 days before FMT...
November 22, 2016: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/27891639/consensus-report-faecal-microbiota-transfer-clinical-applications-and-procedures
#5
REVIEW
J König, A Siebenhaar, C Högenauer, P Arkkila, M Nieuwdorp, T Norén, C Y Ponsioen, U Rosien, N G Rossen, R Satokari, A Stallmach, W de Vos, J Keller, R J Brummer
BACKGROUND: Faecal microbiota transplantation or transfer (FMT) aims at replacing or reinforcing the gut microbiota of a patient with the microbiota from a healthy donor. Not many controlled or randomised studies have been published evaluating the use of FMT for other diseases than Clostridium difficile infection, making it difficult for clinicians to decide on a suitable indication. AIM: To provide an expert consensus on current clinical indications, applications and methodological aspects of FMT...
November 27, 2016: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/27890791/fecal-microbiota-manipulation-prevents-dysbiosis-and-alcohol-induced-liver-injury-in-mice
#6
Gladys Ferrere, Laura Wrzosek, Frédéric Cailleux, Williams Turpin, Virginie Puchois, Madeleine Spatz, Dragos Ciocan, Dominique Rainteau, Lydie Humbert, Cindy Hugot, Françoise Gaudin, Marie-Louise Noordine, Véronique Robert, Dominique Berrebi, Muriel Thomas, Sylvie Naveau, Gabriel Perlemuter, Anne-Marie Cassard
BACKGROUND AND AIMS: Alcoholic liver disease (ALD) is a leading cause of liver failure and mortality. In humans, severe alcoholic hepatitis is associated with key changes of intestinal microbiota (IM), which influences individual sensitivity to develop advanced ALD. We used the different susceptibility to ALD observed in two distinct animal facilities to test the efficiency of two complementary strategies (fecal microbiota transplantation and prebiotic treatment) to reverse dysbiosis and prevent ALD...
November 24, 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/27889929/twenty-eight-years-of-intestinal-transplantation-in-paris-experience-of-the-oldest-european-centre
#7
F Lacaille, S Irtan, L Dupic, C Talbotec, F Lesage, V Colomb, N Salvi, F Moulin, F Sauvat, Y Aigrain, Y Revillon, O Goulet, C Chardot
AIM: Our aim is to describe our achievements in pediatric intestinal transplantation (ITx) and define areas for improvement. METHODS: After a period (1987-90) of 9 isolated small bowel transplants (SBTx) where only one patient survived with her graft, 110 ITx were performed on 101 children from 1994 to 2014: 60 SBTx, 45 liver-small bowel, 4 multivisceral (3 with kidneys), 1 modified multivisceral. Indications were short bowel syndrome (36), motility disorders (30), congenital enteropathies (34) and others (1)...
November 27, 2016: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/27879485/patients-views-on-fecal-microbiota-transplantation-an-acceptable-therapeutic-option-in-inflammatory-bowel-disease
#8
Jonas Zeitz, Marina Bissig, Christiane Barthel, Luc Biedermann, Sylvie Scharl, Daniel Pohl, Pascal Frei, Stephan R Vavricka, Michael Fried, Gerhard Rogler, Michael Scharl
BACKGROUND: Fecal microbiota transplantation (FMT) represents a new therapeutic option that has been studied in two randomized-controlled trials in ulcerative colitis patients. Our study aimed to identify patients' views on the use of this novel therapeutic approach. METHODS: Using an anonymous questionnaire, we obtained data from 574 inflammatory bowel disease (IBD) patients on their knowledge and willingness to undergo FMT. RESULTS: A large proportion of IBD patients (53...
November 22, 2016: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27877172/regulated-inflammation-and-lipid-metabolism-in-colon-mrna-expressions-of-obese-germfree-mice-responding-to-enterobacter-cloacae-b29-combined-with-the-high-fat-diet
#9
Huiying Yan, Na Fei, Guojun Wu, Chenhong Zhang, Liping Zhao, Menghui Zhang
Increased evidences have demonstrated that gut microbiota targeted diet intervention can alleviate obesity and related metabolic disorders. The underlying mechanism of interactions among diet, microbiota, and host still remains unclear. Enterobacter cloacae B29, an endotoxin-producing strain dominated in the gut of a morbidly obese volunteer (weight 174.8 kg, BMI 58.8 kg m(-2)) was isolated and transplanted to germfree mice (inoculated 10(10) cells of B29 per day for 1 week). Using deep mRNA sequencing technology, we compared different gene expression profiles in the colon samples of the germfree mice treated with/without B29 and/or high fat diet (HFD) for 16 weeks and identified 279 differential expressed genes in total, including up-regulated genes Apoa4 (fold change, 2...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27876339/diagnosis-and-treatment-of-clostridium-difficile-c-diff-colitis-review-of-the-literature-and-a-perspective-in-gynecologic-oncology
#10
REVIEW
Kristin N Taylor, Michael T McHale, Cheryl C Saenz, Steven C Plaxe
Clostridium difficile infection (CDI) is a major cause of nosocomial diarrhea with the potential for significant morbidity and mortality. Colonization in a susceptible individual, with risk factors such as prior antibiotic use, advanced age, or medical comorbidities, may result in symptomatic infection. Although patients with a gynecologic malignancy may be at a higher risk of developing CDI due to an increased likelihood of having one or more risk factors, data do not consistently support the idea that chemotherapy or cancer itself are independently associated with CDI...
November 19, 2016: Gynecologic Oncology
https://www.readbyqxmd.com/read/27872615/microbial-communities-of-conducting-and-respiratory-zones-of-lung-transplanted-patients
#11
Marie Beaume, Vladimir Lazarevic, Thilo Köhler, Nadia Gaïa, Oriol Manuel, John-David Aubert, Loïc Baerlocher, Laurent Farinelli, Paola Gasche, Jacques Schrenzel, Christian van Delden
Background: Lung transplantation (LT) is a recognized treatment for end-stage pulmonary disease. Bacteria from the recipient nasopharynx seed the new lungs leading to infections and allograft damage. Understanding the characteristics and topological variations of the microbiota may be important to apprehend the pathophysiology of allograft dysfunction. Objectives: To examine the characteristics and relationship of bacterial compositions between conducting and respiratory zones of the allograft. Methods: We performed 16S rRNA gene sequencing on bronchial aspirates (BAs) and bronchoalveolar lavages (BALs) collected in pairs in 19 patients at several time-points post-LT...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27866880/efficacy-of-sterile-fecal-filtrate-transfer-for-treating-patients-with-clostridium-difficile-infection
#12
Stephan J Ott, Georg H Waetzig, Ateequr Rehman, Jacqueline Moltzau-Anderson, Richa Bharti, Juris A Grasis, Liam Cassidy, Andreas Tholey, Helmut Fickenscher, Dirk Seegert, Philip Rosenstiel, Stefan Schreiber
BACKGROUND & AIMS: Fecal microbiota transplantation (FMT) is a highly effective therapy for recurrent Clostridium difficile infection (CDI). However, transferring undefined living bacteria entails uncontrollable risks for infectious and metabolic or malignant diseases, particularly in immunocompromised patients. We investigated whether sterile fecal filtrates (containing bacterial debris, proteins, antimicrobial compounds, metabolic products and oligonucleotides/DNA), rather than intact microorganisms, are effective in patients with CDI...
November 17, 2016: Gastroenterology
https://www.readbyqxmd.com/read/27861590/phylosymbiosis-relationships-and-functional-effects-of-microbial-communities-across-host-evolutionary-history
#13
Andrew W Brooks, Kevin D Kohl, Robert M Brucker, Edward J van Opstal, Seth R Bordenstein
Phylosymbiosis was recently proposed to describe the eco-evolutionary pattern, whereby the ecological relatedness of host-associated microbial communities parallels the phylogeny of related host species. Here, we test the prevalence of phylosymbiosis and its functional significance under highly controlled conditions by characterizing the microbiota of 24 animal species from four different groups (Peromyscus deer mice, Drosophila flies, mosquitoes, and Nasonia wasps), and we reevaluate the phylosymbiotic relationships of seven species of wild hominids...
November 2016: PLoS Biology
https://www.readbyqxmd.com/read/27861129/an-evaluation-of-the-therapeutic-potential-of-fecal-microbiota-transplantation-to-treat-infectious-and-metabolic-diseases
#14
Albert K Groen, Max Nieuwdorp
No abstract text is available yet for this article.
November 9, 2016: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/27861126/gut-microbiota-influences-pathological-angiogenesis-in-obesity-driven-choroidal-neovascularization
#15
Elisabeth Mma Andriessen, Ariel M Wilson, Gaelle Mawambo, Agnieszka Dejda, Khalil Miloudi, Florian Sennlaub, Przemyslaw Sapieha
Age-related macular degeneration in its neovascular form (NV AMD) is the leading cause of vision loss among adults above the age of 60. Epidemiological data suggest that in men, overall abdominal obesity is the second most important environmental risk factor after smoking for progression to late-stage NV AMD To date, the mechanisms that underscore this observation remain ill-defined. Given the impact of high-fat diets on gut microbiota, we investigated whether commensal microbes influence the evolution of AMD Using mouse models of NV AMD, microbiotal transplants, and other paradigms that modify the gut microbiome, we uncoupled weight gain from confounding factors and demonstrate that high-fat diets exacerbate choroidal neovascularization (CNV) by altering gut microbiota...
December 1, 2016: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/27858930/environmental-spread-of-microbes-impacts-the-development-of-metabolic-phenotypes-in-mice-transplanted-with-microbial-communities-from-humans
#16
Li Zhang, Martin Iain Bahl, Henrik Munch Roager, Cilius Esmann Fonvig, Lars I Hellgren, Henrik Lauritz Frandsen, Oluf Pedersen, Jens-Christian Holm, Torben Hansen, Tine Rask Licht
Microbiota transplantation to germ-free animals is a powerful method to study involvement of gut microbes in the aetiology of metabolic syndrome. Owing to large interpersonal variability in gut microbiota, studies with broad coverage of donors are needed to elucidate the establishment of human-derived microbiotas in mice, factors affecting this process and resulting impact on metabolic health. We thus transplanted faecal microbiotas from humans (16 obese and 16 controls) separately into 64 germ-free Swiss Webster mice caged in pairs within four isolators, with two isolators assigned to each phenotype, thereby allowing us to explore the extent of microbial spread between cages in a well-controlled environment...
November 18, 2016: ISME Journal
https://www.readbyqxmd.com/read/27856521/gleaning-insights-from-fecal-microbiota-transplantation-and-probiotic-studies-for-the-rational-design-of-combination-microbial-therapies
#17
REVIEW
Lauren E Hudson, Sarah E Anderson, Anita H Corbett, Tracey J Lamb
Beneficial microorganisms hold promise for the treatment of numerous gastrointestinal diseases. The transfer of whole microbiota via fecal transplantation has already been shown to ameliorate the severity of diseases such as Clostridium difficile infection, inflammatory bowel disease, and others. However, the exact mechanisms of fecal microbiota transplant efficacy and the particular strains conferring this benefit are still unclear. Rationally designed combinations of microbial preparations may enable more efficient and effective treatment approaches tailored to particular diseases...
January 2017: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/27856471/role-of-the-intestinal-mucosa-in-acute-gastrointestinal-gvhd
#18
REVIEW
Jonathan U Peled, Alan M Hanash, Robert R Jenq
Intestinal graft-versus-host disease (GVHD) remains a significant obstacle to the success of allogeneic hematopoietic cell transplantation. The intestinal mucosa comprises the inner lining of the intestinal tract and maintains close proximity with commensal microbes that reside within the intestinal lumen. Recent advances have significantly improved our understanding of the interactions between the intestinal mucosa and the enteric microbiota. Changes in host mucosal tissue and commensals posttransplant have been actively investigated, and provocative insights into mucosal immunity and the enteric microbiota are now being translated into clinical trials of novel approaches for preventing and treating acute GVHD...
November 17, 2016: Blood
https://www.readbyqxmd.com/read/27850226/586-fecal-microbiota-transplantation-in-severe-initial-clostridium-difficile-infection-a-meta-analysis
#19
Sandhya Samavedam, Sumedh Hoskote
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27832684/fecal-microbiota-transplantation-and-the-brain-microbiota-in-neurological-diseases
#20
Marco Ruggiero
No abstract text is available yet for this article.
November 2016: Clinical Endoscopy
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