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Lactobacillus reuteri

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https://www.readbyqxmd.com/read/28326154/probiotic-lactobacillus-reuteri-has-antifungal-effects-on-oral-candida-species-in-vitro
#1
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
https://www.readbyqxmd.com/read/28326063/lactobacillus-reuteri-surface-mucus-adhesins-upregulate-inflammatory-responses-through-interactions-with-innate-c-type-lectin-receptors
#2
Krisztián P Bene, Devon W Kavanaugh, Charlotte Leclaire, Allan P Gunning, Donald A MacKenzie, Alexandra Wittmann, Ian D Young, Norihito Kawasaki, Eva Rajnavolgyi, Nathalie Juge
The vertebrate gut symbiont Lactobacillus reuteri exhibits strain-specific adhesion and health-promoting properties. Here, we investigated the role of the mucus adhesins, CmbA and MUB, upon interaction of L. reuteri ATCC PTA 6475 and ATCC 53608 strains with human monocyte-derived dendritic cells (moDCs). We showed that mucus adhesins increased the capacity of L. reuteri strains to interact with moDCs and promoted phagocytosis. Our data also indicated that mucus adhesins mediate anti- and pro-inflammatory effects by the induction of interleukin-10 (IL-10), tumor necrosis factor alpha (TNF-α), IL-1β, IL-6, and IL-12 cytokines...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28319379/immobilization-of-%C3%AE-galactosidases-from-lactobacillus-on-chitin-using-chitin-binding-domain
#3
Mai Lan Mai Pham, Tatjana Leister, Hoang Anh Nguyen, Bien-Cuong Do, Tuan-Anh Pham, Dietmar Haltrich, Montarop Yamabhai, Thu-Ha Nguyen, Tien-Thanh Nguyen
Two β-galactosidases from Lactobacillus including a heterodimeric, LacLM type enzyme from L. reuteri L103 and a homodimeric LacZ type β-galactosidase from L. bulgaricus DSM 20081 were studied for immobilization on chitin using a carbohydrate-binding domain (chitin-binding domain, ChBD) from a chitinolytic enzyme. Three recombinant enzymes, namely LacLM-ChBD, ChBD-LacLM and LacZ-ChBD, were constructed and successfully expressed in L. plantarum WCFS1. Depending on the structure of the enzymes, either homodimeric or heterodimeric, as well as the positioning of the chitin-binding domain in relation to the catalytic domains, i...
March 20, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28300786/hypocholesterolemic-effects-of-probiotic-mixture-on-diet-induced-hypercholesterolemic-rats
#4
Shang-Jin Kim, Sang Hoon Park, Hong-Sig Sin, Seung-Hwan Jang, Sang-Wang Lee, Seon-Young Kim, Bora Kwon, Kang-Yeol Yu, Su Young Kim, Dong Kwon Yang
Growing evidence has indicated that supplementation with probiotics improves lipid metabolism. We aimed to investigate the beneficial effects of a probiotics mixture (PM) of three strains belonging to the species Bifidobacterium (B. longum, B. lactis, and B. breve) and two strains belonging to the species Lactobacillus (L. reuteri and L. plantarum) on cholesterol-lowering efficacy in hypercholesterolemic rats. A hypercholesterolemic rat model was established by feeding a high-cholesterol diet for eight weeks...
March 16, 2017: Nutrients
https://www.readbyqxmd.com/read/28291819/correction-identification-and-characterization-of-sulfated-carbohydrate-binding-protein-from-lactobacillus-reuteri
#5
Keita Nishiyama, Ayaka Ochiai, Daigo Tsubokawa, Kazuhiko Ishihara, Yuji Yamamoto, Takao Mukai
[This corrects the article DOI: 10.1371/journal.pone.0083703.].
2017: PloS One
https://www.readbyqxmd.com/read/28285599/microbiome-and-metabolome-modifying-effects-of-several-cardiovascular-disease-interventions-in-apo-e-mice
#6
Paul M Ryan, Lis E E London, Trent C Bjorndahl, Rupasri Mandal, Kiera Murphy, Gerald F Fitzgerald, Fergus Shanahan, R Paul Ross, David S Wishart, Noel M Caplice, Catherine Stanton
BACKGROUND: There is strong evidence indicating that gut microbiota have the potential to modify, or be modified by the drugs and nutritional interventions that we rely upon. This study aims to characterize the compositional and functional effects of several nutritional, neutraceutical, and pharmaceutical cardiovascular disease interventions on the gut microbiome, through metagenomic and metabolomic approaches. Apolipoprotein-E-deficient mice were fed for 24 weeks either high-fat/cholesterol diet alone (control, HFC) or high-fat/cholesterol in conjunction with one of three dietary interventions, as follows: plant sterol ester (PSE), oat β-glucan (OBG) and bile salt hydrolase-active Lactobacillus reuteri APC 2587 (BSH), or the drug atorvastatin (STAT)...
March 13, 2017: Microbiome
https://www.readbyqxmd.com/read/28280842/in-vitro-effect-of-vaginal-lactobacilli-on-the-growth-and-adhesion-abilities-of-uropathogenic-escherichia-coli
#7
María Cecilia Leccese Terraf, María Silvina Juarez Tomás, Lucie Rault, Yves Le Loir, Sergine Even, María Elena Fátima Nader-Macías
Escherichia coli is one of the main causes of uncomplicated urinary tract infections and responsible of vaginal infections. Lactobacilli can inhibit this pathogen by the production of antimicrobial substances as organic acids, hydrogen peroxide and/or bacteriocins. The aim of this work was to study the effects of beneficial vaginal lactobacilli on E. coli through in vitro experiments. The inhibitory activity of three vaginal Lactobacillus strains against E. coli was assessed using the agar plate diffusion. Moreover, the effect of Lactobacillus reuteri CRL (Centro de Referencia para Lactobacilos Culture Collection) 1324 on the adhesion and internalization capabilities of E...
March 9, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28280024/draft-genome-sequence-of-lactobacillus-reuteri-121-a-source-of-%C3%AE-glucan-and-%C3%AE-fructan-exopolysaccharides
#8
Joana Gangoiti, Xiangfeng Meng, Alicia Lammerts van Bueren, Lubbert Dijkhuizen
The probiotic bacterium Lactobacillus reuteri 121 is a well-known producer of diverse homoexopolysaccharides (α-glucans and β-fructans) from sucrose and maltodextrins/starches of interest for food applications. Here, we report the draft genome sequence of this strain, with a focus on carbohydrate-active enzymes.
March 9, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28271385/possible-correlation-between-levansucrase-production-and-probiotic-activity-of-bacillus-sp-isolated-from-honey-and-honey-bee
#9
Abdelhamid A Hamdy, Nouran A Elattal, Magdy A Amin, Amal E Ali, Nahla M Mansour, Ghada E A Awad, Hassan M Awad, Mona A Esawy
Five bacterial isolates from honey and bee gut were selected based on their high levansucrase activity and levan yield which were strongly positively correlated. All isolates showed good tolerance to temperature up to 70 °C, to NaCl up to 3 M and to 0.1% H2O2. They maintained over 59 and 64% survival at pH 9.0 and 2.0 respectively, but showed varying tolerance to 0.1% bile salts and pancreatic enzymes. Most isolates were susceptible to widely used antibiotics, but demonstrated diverse antimicrobial activity...
April 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28261897/coproduction-of-colicin-v-and-lactic-acid-bacteria-bacteriocins-in-lactococci-and-enterococci-strains-of-biotechnological-interest
#10
S Langa, J L Arqués, M Medina, J M Landete
AIMS: The aim of this study was the coproduction in a single strain of the Gram-negative bacteriocin colicin V with other bacteriocins from lactic acid bacteria. METHODS AND RESULTS: Colicin V was expressed in Lactococcus and Enterococcus strains by replacing the colicin V leader peptide by the leader peptide and promoter of D-alanyl-D-alanine carboxypeptidase from Lactobacillus reuteri CECT925 (pNZ:LR-colV). The antimicrobial activity of colicin V against the indicator organism E...
March 6, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28258313/catechol-glucosides-act-as-donor-acceptor-substrates-of-glucansucrase-enzymes-of-lactobacillus-reuteri
#11
Evelien M Te Poele, Vincent Valk, Tim Devlamynck, Sander S van Leeuwen, Lubbert Dijkhuizen
Previously, we have shown that the glucansucrase GtfA-ΔN enzyme of Lactobacillus reuteri 121, incubated with sucrose, efficiently glucosylated catechol and we structurally characterized catechol glucosides with up to five glucosyl units attached (te Poele et al. in Bioconjug Chem 27:937-946, 2016). In the present study, we observed that upon prolonged incubation of GtfA-ΔN with 50 mM catechol and 1000 mM sucrose, all catechol had become completely glucosylated and then started to reappear. Following depletion of sucrose, this glucansucrase GtfA-ΔN used both α-D-Glcp-catechol and α-D-Glcp-(1→4)-α-D-Glcp-catechol as donor substrates and transferred a glucose unit to other catechol glycoside molecules or to sugar oligomers...
March 3, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28231561/structural-analysis-of-rebaudioside-a-derivatives-obtained-by-lactobacillus-reuteri-180-glucansucrase-catalyzed-trans-%C3%AE-glucosylation
#12
Gerrit J Gerwig, Evelien M Te Poele, Lubbert Dijkhuizen, Johannis P Kamerling
The wild-type Gtf180-ΔN glucansucrase enzyme from Lactobacillus reuteri 180 was found to catalyze the α-glucosylation of the steviol glycoside rebaudioside A, using sucrose as glucosyl donor in a transglucosylation process. Structural analysis of the formed products by MALDI-TOF mass spectrometry, methylation analysis and NMR spectroscopy showed that rebaudioside A is specifically α-d-glucosylated at the steviol C-19 β-d-glucosyl moiety (55% conversion). The main product is a mono-(α1 → 6)-glucosylated derivative (RebA-G1)...
February 22, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/28210874/erratum-to-effect-of-lactobacillus-reuteri-on-cell-viability-and-pge2-production-in-human-gingival-fibroblasts
#13
Gina A Castiblanco, Tulay Yucel-Lindberg, Stefan Roos, Svante Twetman
No abstract text is available yet for this article.
February 16, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28194955/luminometric-label-array-for-counting-and-differentiation-of-bacteria
#14
Milla Högmander, Catherine J Paul, Sandy Chan, Elina Hokkanen, Ville Eskonen, Tapio Pahikkala, Sari Pihlasalo
Methods for simple and fast detection and differentiation of bacterial species are required, for instance, in medicine, water quality monitoring, and the food industry. Here, we have developed a novel label array method for the counting and differentiation of bacterial species. This method is based on the nonspecific interactions of multiple unstable lanthanide chelates and selected chemicals within the sample leading to a luminescence signal profile that is unique to the bacterial species. It is simple, cost-effective, and/or user-friendly compared to many existing methods, such as plate counts on selective media, automatic (hemocytometer-based) cell counters, flow cytometry, and polymerase chain reaction (PCR)-based methods for identification...
February 20, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28114795/efficacy-and-safety-of-apt198k-for-the-treatment-of-infantile-colic-a-pilot-study
#15
Yvan Vandenplas, Anca Bacarea, Marius Marusteri, Vlad Bacarea, Mariana Constantin, Mihai Manolache
AIM: Comparing efficacy and safety of APT198K (xyloglucan plus heat-killed Lactobacillus reuteri SGL01 and Bifidobacterium brevis SGB01) versus a lactase dietary supplement as first-line treatment of infantile colic. METHODS: Randomized, multicenter, open-label, parallel group, active-controlled study, in 46 infants aged 3-16 weeks with infantile colic, receiving APT198K or a lactase dietary supplement for 10 days. RESULTS: Number and duration of crying episodes decreased significantly versus baseline in both groups...
January 24, 2017: Journal of Comparative Effectiveness Research
https://www.readbyqxmd.com/read/28103868/probiotics-for-vaginal-health-in-south-africa-what-is-on-retailers-shelves
#16
Anna-Ursula Happel, Shameem Z Jaumdally, Tanya Pidwell, Tracy Cornelius, Heather B Jaspan, Remy Froissart, Shaun L Barnabas, Jo-Ann S Passmore
BACKGROUND: Probiotics are widely used to improve gastrointestinal (GI) health, but they may also be useful to prevent or treat gynaecological disorders, including bacterial vaginosis (BV) and candidiasis. BV prevalence is high in South Africa and is associated with increased HIV risk and pregnancy complications. We aimed to assess the availability of probiotics for vaginal health in retail stores (pharmacies, supermarkets and health stores) in two major cities in South Africa. METHODS: A two-stage cluster sampling strategy was used in the Durban and Cape Town metropoles...
January 19, 2017: BMC Women's Health
https://www.readbyqxmd.com/read/28060932/global-analysis-of-mannitol-2-dehydrogenase-in-lactobacillus-reuteri-crl-1101-during-mannitol-production-through-enzymatic-genetic-and-proteomic-approaches
#17
Maria Eugenia Ortiz, Juliana Bleckwedel, Silvina Fadda, Gianluca Picariello, Elvira M Hebert, Raúl R Raya, Fernanda Mozzi
Several plants, fungi, algae, and certain bacteria produce mannitol, a polyol derived from fructose. Mannitol has multiple industrial applications in the food, pharmaceutical, and medical industries, being mainly used as a non-metabolizable sweetener in foods. Many heterofermentative lactic acid bacteria synthesize mannitol when an alternative electron acceptor such as fructose is present in the medium. In previous work, we reported the ability of Lactobacillus reuteri CRL 1101 to efficiently produce mannitol from sugarcane molasses as carbon source at constant pH of 5...
2017: PloS One
https://www.readbyqxmd.com/read/28059108/4-3-%C3%AE-glucanotransferase-a-novel-reaction-specificity-in-glycoside-hydrolase-family-70-and-clan-gh-h
#18
Joana Gangoiti, Sander S van Leeuwen, Gerrit J Gerwig, Stéphane Duboux, Christina Vafiadi, Tjaard Pijning, Lubbert Dijkhuizen
Lactic acid bacteria possess a diversity of glucansucrase (GS) enzymes that belong to glycoside hydrolase family 70 (GH70) and convert sucrose into α-glucan polysaccharides with (α1 → 2)-, (α1 → 3)-, (α1 → 4)- and/or (α1 → 6)-glycosidic bonds. In recent years 3 novel subfamilies of GH70 enzymes, inactive on sucrose but using maltodextrins/starch as substrates, have been established (e.g. GtfB of Lactobacillus reuteri 121). Compared to the broad linkage specificity found in GSs, all GH70 starch-acting enzymes characterized so far possess 4,6-α-glucanotransferase activity, cleaving (α1 → 4)-linkages and synthesizing new (α1 → 6)-linkages...
January 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28057659/lactobacillus-reuteri-dsm-17938-in-the-prevention-of-antibiotic-associated-diarrhoea-in-children-protocol-of-a-randomised-controlled-trial
#19
Maciej Kołodziej, Hania Szajewska
INTRODUCTION: Administration of some probiotics appears to reduce the risk of antibiotic-associated diarrhoea (AAD). The effects of probiotics are strain-specific, thus, the efficacy and safety of each probiotic strain should be established separately. We aim to assess the effects of Lactobacillus reuteri DSM 17938 administration for the prevention of diarrhoea and AAD in children. METHODS AND ANALYSIS: A total of 250 children younger than 18 years treated with antibiotics will be enrolled in a double-blind, randomised, placebo-controlled trial in which they will additionally receive L...
January 5, 2017: BMJ Open
https://www.readbyqxmd.com/read/28055130/effect-of-biochanin-a-on-corn-grain-zea-mays-fermentation-by-bovine-rumen-amylolytic-bacteria
#20
B E Harlow, M D Flythe, G E Aiken
AIMS: The objective was to determine the effect of biochanin A (BCA), an isoflavone produced by red clover (Trifolium pratense L.), on corn fermentation by rumen micro-organisms. METHODS AND RESULTS: When bovine rumen bacterial cell suspensions (n = 3) were incubated (24 h, 39°C) with ground corn, amylolytic bacteria including group D Gram-positive cocci (GPC; Streptococcus bovis; enterococci) proliferated, cellulolytic bacteria were inhibited, lactate accumulated and pH declined...
April 2017: Journal of Applied Microbiology
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