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Lactobacillus reuteri

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https://www.readbyqxmd.com/read/28524868/diabetes-associated-microbiota-in-fa-fa-rats-is-modified-by-roux-en-y-gastric-bypass
#1
Tulika Arora, Florian Seyfried, Neil G Docherty, Valentina Tremaroli, Carel W le Roux, Rosie Perkins, Fredrik Bäckhed
Roux-en-Y gastric bypass (RYGB) and duodenal jejunal bypass (DJB), two different forms of bariatric surgery, are associated with improved glucose tolerance, but it is not clear whether the gut microbiota contributes to this effect. Here we used fa/fa rats as a model of impaired glucose tolerance to investigate whether (i) the microbiota varies between fa/fa and nondiabetic fa/+ rats; (ii) the microbiota of fa/fa rats is affected by RYGB and/or DJB; and (iii) surgically induced microbiota alterations contribute to glucose metabolism...
May 19, 2017: ISME Journal
https://www.readbyqxmd.com/read/28520731/genetically-engineered-probiotic-for-the-treatment-of-phenylketonuria-pku-assessment-of-a-novel-treatment-in-vitro-and-in-the-pahenu2-mouse-model-of-pku
#2
Katherine E Durrer, Michael S Allen, Ione Hunt von Herbing
Phenylketonuria (PKU) is a genetic disease characterized by the inability to convert dietary phenylalanine to tyrosine by phenylalanine hydroxylase. Given the importance of gut microbes in digestion, a genetically engineered microbe could potentially degrade some ingested phenylalanine from the diet prior to absorption. To test this, a phenylalanine lyase gene from Anabaena variabilis (AvPAL) was codon-optimized and cloned into a shuttle vector for expression in Lactobacillus reuteri 100-23C (pHENOMMenal). Functional expression of AvPAL was determined in vitro, and subsequently tested in vivo in homozygous PAHenu2 (PKU model) mice...
2017: PloS One
https://www.readbyqxmd.com/read/28512779/structure-of-protein-emulsion-in-food-impacts-intestinal-microbiota-caecal-luminal-content-composition-and-distal-intestine-characteristics-in-rats
#3
Martin Beaumont, Daphné Jaoui, Véronique Douard, Damien Mat, Fanny Koeth, Bénédicte Goustard, Camille Mayeur, Stanislas Mondot, Anais Hovaghimian, Steven Le Feunteun, Catherine Chaumontet, Anne-Marie Davila, Daniel Tomé, Isabelle Souchon, Camille Michon, Gilles Fromentin, François Blachier, Marion Leclerc
SCOPE: Few studies have evaluated in vivo the impact of food structure on digestion, absorption of nutrients and on microbiota composition and metabolism. In this study we evaluated in rat the impact of two structures of protein emulsion in food on gut microbiota, luminal content composition, and intestinal characteristics. METHODS AND RESULTS: Rats received for 3 weeks two diets of identical composition but based on lipid-protein matrices of liquid fine (LFE) or gelled coarse (GCE) emulsion...
May 17, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28508168/distinct-histone-modifications-modulate-defb1-expression-in-human-vaginal-keratinocytes-in-response-to-lactobacillus-spp
#4
Jaehyouk Lee, Ara Jang, Jin Wook Kim, Jun Hyun Han, Byung Hee Chun, Hye Su Jung, Che Ok Jeon, Soon Chul Myung
Vaginal commensal lactobacilli are considered to contribute significantly to the control of vaginal microbiota by competing with other microflora for adherence to the vaginal epithelium and by producing antimicrobial compounds. However, the molecular mechanisms of symbiotic prokaryotic-eukaryotic communication in the vaginal ecosystem remain poorly understood. Here, we showed that both DNA methylation and histone modifications were associated with expression of the DEFB1 gene, which encodes the antimicrobial peptide human β-defensin-1, in vaginal keratinocyte VK2/E6E7 cells...
May 15, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28504566/influence-of-lactobacillus-reuteri-l26-biocenol%C3%A2-on-immune-response-against-porcine-circovirus-type-2-infection-in-germ-free-mice
#5
V Karaffová, T Csank, D Mudroňová, J Király, V Revajová, S Gancarčíková, R Nemcová, J Pistl, Š Vilček, M Levkut
Probiotic bacteria are frequently used for prevention of bacterial infections of the gastrointestinal tract, but there are only limited studies on their efficacy against viral gut infections in animals. The aim of this study was to investigate the effect of probiotic Lactobacillus reuteri L26 Biocenol(TM) on the innate and adaptive immune responses in germ-free Balb/c mice, experimentally infected by porcine circovirus type 2 (PCV2), which confers immunosuppressive effect. A total of 30 six-week-old female mice were divided into 3 groups and animals in experimental group LPCV (n=10) were inoculated with L...
May 15, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28502277/lactobacillus-paracasei-gmnl-32-lactobacillus-reuteri-gmnl-89-and-l-reuteri-gmnl-263-ameliorate-hepatic-injuries-in-lupus-prone-mice
#6
Tsai-Ching Hsu, Chih-Yang Huang, Chung-Hsien Liu, Kuo-Ching Hsu, Yi-Hsing Chen, Bor-Show Tzang
Probiotics are known to regulate host immunity by interacting with systemic and mucosal immune cells as well as intestinal epithelial cells. Supplementation with certain probiotics has been reported to be effective against various disorders, including immune-related diseases. However, little is known about the effectiveness of Lactobacillus paracasei GMNL-32 (GMNL-32), Lactobacillus reuteri GMNL-89 (GMNL-89) and L. reuteri GMNL-263 (GMNL-263) in the management of autoimmune diseases, especially systemic lupus erythematosus (SLE)...
May 15, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28473390/draft-genome-sequence-of-lactobacillus-reuteri-cect8605
#7
Ana I Sañudo, Mónica M Olivares, Oscar Bañuelos
Lactobacillus reuteri CECT8605 has shown potential probiotic properties in both in vitro and in vivo assays. Besides its beneficial characteristics, general aspects concerning genetic stability and safety for human consumption have been studied. Its genome sequence has been a useful tool to support preliminary conclusions based on empirical observations.
May 4, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28439658/pan-genomic-approaches-in-lactobacillus-reuteri-as-a-porcine-probiotic-investigation-of-host-adaptation-and-antipathogenic-activity
#8
Jun-Yeong Lee, Geon Goo Han, Jaeyun Choi, Gwi-Deuk Jin, Sang-Kee Kang, Byung Jo Chae, Eun Bae Kim, Yun-Jaie Choi
After the introduction of a ban on the use of antibiotic growth promoters (AGPs) for livestock, reuterin-producing Lactobacillus reuteri is getting attention as an alternative to AGPs. In this study, we investigated genetic features of L. reuteri associated with host specificity and antipathogenic effect. We isolated 104 L. reuteri strains from porcine feces, and 16 strains, composed of eight strains exhibiting the higher antipathogenic effect (group HS) and eight strains exhibiting the lower effect (group LS), were selected for genomic comparison...
April 24, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28438205/expression-of-the-clonostachys-rosea-lactonohydrolase-gene-by-lactobacillus-reuteri-to-increase-its-zearalenone-removing-ability
#9
Wen-Chun Yang, Tsui-Chun Hsu, Kuan-Chen Cheng, Je-Ruei Liu
BACKGROUND: Mycotoxins are secondary metabolites produced by filamentous fungi that can contaminate agricultural crops in the field as well as during harvest, transportation, processing, or storage. Zearalenone (ZEN), a non-steroidal estrogenic mycotoxin, produced by Fusarium species, has been shown to be associated with reproductive disorders in farm animals and to a lesser extent in hyperoestrogenic syndromes in humans. Thus, the decontamination of ZEN in foods and feeds is an important issue...
April 24, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28429333/effect-of-lactobacillus-reuteri-dsm-17938-on-methane-production-in-patients-affected-by-functional-constipation-a-retrospective-study
#10
V Ojetti, C Petruzziello, A Migneco, M Gnarra, A Gasbarrini, F Franceschi
OBJECTIVE: Constipation is a common symptom affecting up to 30% of the Western population and is strongly associated with the presence of intestinal methanogens, which may directly inhibit motor activity. Two recent studies performed on adult and children affected by chronic constipation showed that the supplementation with L. reuteri significantly improved bowel movements. Whether its action is related to a decreasing of methane (CH4) production has never been tested. We have therefore designed a study aimed at testing this hypothesis...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28416886/optimization-of-reuterin-production-in-cheese-by-lactobacillus-reuteri
#11
Izaskun Martín-Cabrejas, Susana Langa, Pilar Gaya, Eva Rodríguez, José M Landete, Margarita Medina, Juan L Arqués
Cheeses manufactured from pasteurized milk supplemented with glycerol and reuterin-producing Lactobacillus reuteri INIA P572 as adjunct to the commercial starter culture were analysed in order to optimize a biopreservation strategy. The highest reuterin concentration determined by a colorimetric assay was detected on day 1 in cheeses with 100-500 mM glycerol. The presence of reuterin was confirmed by a direct detection technique as HPLC. Cheeses made with L. reuteri and 200 or 500 mM glycerol showed a red tendency in color in comparison with control...
April 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28401403/analysis-of-antimicrobial-and-immunomodulatory-substances-produced-by-heterofermentative-lactobacillus-reuteri
#12
Gabriela Greifová, Hyacinta Májeková, Gabriel Greif, Patrik Body, Maria Greifová, Martina Dubničková
Antimicrobial and immunomodulatory potential of various Lactobacillus reuteri strains is closely connected to their metabolite production profile under given cultivation conditions. We determined the in vitro production of antimicrobial substances such as organic acids, ethanol, and reuterin by four strains of L. reuteri (L. reuteri E, L. reuteri KO5, L. reuteri CCM 3625, and L. reuteri ATCC 55730). All studied L. reuteri strains showed the ability to produce lactic acid, acetic acid, and ethanol with concominant consumption of glucose and together with phenyllactic acid-a potent antifungal compound-with concominant consumption of phenylalanine...
April 11, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28396655/enhanced-probiotic-potential-of-lactobacillus-reuteri-when-delivered-as-a-biofilm-on-dextranomer-microspheres-that-contain-beneficial-cargo
#13
Jason B Navarro, Lauren Mashburn-Warren, Lauren O Bakaletz, Michael T Bailey, Steven D Goodman
As with all orally consumed probiotics, the Gram-positive bacterium Lactobacillus reuteri encounters numerous challenges as it transits through the gastrointestinal tract of the host, including low pH, effectors of the host immune system, as well as competition with commensal and pathogenic bacteria, all of which can greatly reduce the availability of live bacteria for therapeutic purposes. Recently we showed that L. reuteri, when adhered in the form of a biofilm to a semi-permeable biocompatible dextranomer microsphere, reduces the incidence of necrotizing enterocolitis by 50% in a well-defined animal model following delivery of a single prophylactic dose...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28389535/experimental-evaluation-of-host-adaptation-of-lactobacillus-reuteri-to-different-vertebrate-species
#14
Rebbeca M Duar, Steven A Frese, Xiaoxi B Lin, Samodha C Fernando, Thomas E Burkey, Guergana Tasseva, Daniel A Peterson, Jochen Blom, Cory Q Wenzel, Christine M Szymanski, Jens Walter
The species Lactobacillus reuteri has diversified into host-specific lineages implying a long term association with different vertebrates. Strains from rodent lineages show specific adaptations to mice, but the processes underlying the evolution of L. reuteri in other hosts remain unknown. We administered three standardized inocula composed of strains from different host-confined lineages to mice, pigs, chickens and humans. The ecological performance of each strain in the gastrointestinal tract of each host was determined by typing random colonies recovered from fecal samples collected over five consecutive days post-administration...
April 7, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28377765/antagonistic-activity-of-lactobacillus-reuteri-strains-on-the-adhesion-characteristics-of-selected-pathogens
#15
Tejinder P Singh, Gurpreet Kaur, Suman Kapila, Ravinder K Malik
Adhesion ability of probiotics is the key factor that decides their colonization in the gastrointestinal tract and potential to inhibit pathogens. Therefore, adhesion ability can be considered as a key determinant for probiotic efficacy. Presents study documents the antagonistic activity of viable/untreated, Lithium chloride (LiCl) treated or heat-killed forms of eight probiotic Lactobacillus reuteri strains on the adhesion characteristics of selected pathogens. All strains investigated were able to adhere to Caco-2 cells...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28359737/a-flow-cytometric-method-to-evaluate-eosinophil-mediated-uptake-of-probiotic-lactobacillus-reuteri
#16
Laura S Kraemer, Todd A Brenner, Julia O Krumholz, Helene F Rosenberg
Eosinophils are resident leukocytes of gut mucosa. Here we present a combined flow cytometric-antibiotic protection assay to identify mouse eosinophils capable of bacterial uptake, specifically, Gram-positive Lactobacillus reuteri, in studies performed ex vivo. The assay may be adapted for use in vivo.
March 27, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28350268/molecular-and-biopharmaceutical-investigation-of-alginate-inulin-synbiotic-coencapsulation-of-probiotic-to-target-the-colon
#17
Abdelbasset Atia, Ahmed I Gomma, Ismail Fliss, Eric Beyssac, Ghislain Garrait, Muriel Subirade
Colon targeting, as a site-specific delivery for oral formulation, remains a major challenge, especially for sensitive bioactive components such as therapeutic forms of phages, live attenuated virus and prebiotics-probiotics association. Synbiotics could be used to protect encapsulated probiotics during the gastrointestinal tract and control their release in the colon. To achieve these goals, effective prebiotics, such as inulin, could be combined with alginate - the most exploited polymer used for probiotic encapsulation - in the form of beads...
April 19, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28344333/stressor-exposure-has-prolonged-effects-on-colonic-microbial-community-structure-in-citrobacter-rodentium-challenged-mice
#18
Jeffrey D Galley, Amy R Mackos, Vanessa A Varaljay, Michael T Bailey
Stressor exposure significantly affects the colonic mucosa-associated microbiota, and exacerbates Citrobacter rodentium-induced inflammation, effects that can be attenuated with probiotic Lactobacillus reuteri. This study assessed the structure of the colonic mucosa-associated microbiota in mice exposed to a social stressor (called social disruption), as well as non-stressed control mice, during challenge with the colonic pathogen C. rodentium. Mice were exposed to the social stressor or home cage control conditions for six consecutive days and all mice were challenged with C...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28342608/production-of-reuterin-in-a-fermented-milk-product-by-lactobacillus-reuteri-inhibition-of-pathogens-spoilage-microorganisms-and-lactic-acid-bacteria
#19
Y Ortiz-Rivera, R Sánchez-Vega, N Gutiérrez-Méndez, J León-Félix, C Acosta-Muñiz, D R Sepulveda
We assessed the antimicrobial activity of reuterin produced in vitro in glycerol aqueous solutions in situ by Lactobacillus reuteri ATCC 53608 as part of a fermented milk product against starter (Lactobacillus delbrueckii ssp. bulgaricus and Streptococcus thermophilus), spoilage (Penicillium expansum), pathogenic (Staphylococcus aureus, Salmonella enterica ssp. enterica, and Listeria monocytogenes), and pathogen surrogate (Escherichia coli DH5α) microorganisms. We also assayed the influence of cold storage (28 d at 4°C) and reuterin on the color and rheology of the fermented milk product...
March 22, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28326154/probiotic-lactobacillus-reuteri-has-antifungal-effects-on-oral-candida-species-in-vitro
#20
Mette Rose Jørgensen, Camilla Kragelund, Peter Østrup Jensen, Mette Kirstine Keller, Svante Twetman
Background: An alternative approach for managing Candida infections in the oral cavity by modulating the oral microbiota with probiotic bacteria has been proposed. Objective: The aim was to investigate the antifungal potential of the probiotic bacterium Lactobacillus reuteri (DSM 17938 and ATCC PTA 5289) against six oral Candida species (C. albicans, C. glabrata, C. krusei, C. tropicalis, C. dubliniensis, and C. parapsilosis). Design: The lactobacilli were tested for their ability to co-aggregate with and inhibit the growth of the yeasts assessed by spectrophotometry and the agar overlay inhibition assay...
2017: Journal of Oral Microbiology
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