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https://www.readbyqxmd.com/read/29333697/lactic-acid-bacteria-may-impact-intestinal-barrier-function-by-modulating-goblet-cells
#1
Chengcheng Ren, Jelleke Dokter-Fokkens, Susana Figueroa Lozano, Qiuxiang Zhang, Bart J de Haan, Hao Zhang, Marijke M Faas, Paul de Vos
SCOPE: Lactic acid bacteria (LAB) are recognized to promote gastrointestinal health by mechanisms that are not fully understood. LABs might modulate the mucus and thereby enhance intestinal barrier function. Herein, we investigated effects of different LAB strains and species on goblet cell genes involved in mucus synthesis. METHODS AND RESULTS: Gene expression profiles of goblet cell-associated products (mucin MUC2, trefoil factor 3, resistin-like molecule β, carbohydrate sulfotransferase 5, and galactose-3-O-sulfotransferase 2) induced by LAB or their derived conditioned medium in human goblet cell line LS174T were studied...
January 15, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29330879/biotechnological-conversion-of-spent-coffee-grounds-into-lactic-acid
#2
Helena Hudeckova, Markus Neureiter, Stanislav Obruca, Sabine Frühauf, Ivana Marova
This work investigates the potential conversion of spent coffee grounds (SCG) into lactic acid (LA). SCG were hydrolysed by a combination of dilute acid treatment and subsequent application of cellulase. The SCG hydrolysate contained a considerable amount of reducing sugars (9.02 ± 0.03 g l-1 , glucose; 26.49 ± 0.10 g l-1 galactose and 2.81 ± 0.07 g l-1 arabinose) and it was used as a substrate for cultivation of several lactic acid bacteria (LAB) and also lactic acid producing Bacillus coagulans. Among the screened microorganisms, Lactobacillus rhamnosus, CCM 1825 was identified as the most promising producer of LA on SCG hydrolysate...
January 13, 2018: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/29329843/partial-substitution-of-nacl-by-kcl-and-addition-of-flavor-enhancers-on-probiotic-prato-cheese-a-study-covering-manufacturing-ripening-and-storage-time
#3
Hugo L A Silva, Celso F Balthazar, Erick A Esmerino, Roberto P C Neto, Ramon S Rocha, Jeremias Moraes, Rodrigo N Cavalcanti, Robson M Franco, Maria Inês B Tavares, Jânio S Santos, Daniel Granato, Renata G B Costa, Mônica Q Freitas, Márcia C Silva, Renata S L Raices, C Senaka Ranadheera, Filomena Nazzaro, Amir M Mortazavian, Adriano G Cruz
Cheese is a suitable matrix to deliver probiotic strains but it contains a high amount of sodium. The effect of partial substitution of NaCl by KCl and the addition of flavor enhancers (l-arginine, yeast and oregano extract) on probiotic Prato cheese was investigated after 1, 30, and 60 d of refrigerated storage (immediately after manufacturing, and during ripening and storage). Microbiological (lactic acid bacteria and probiotic Lactobacillus casei 01 counts and survival under gastrointestinal conditions), physicochemical (pH, proteolysis, fatty acids), bioactivity (antioxidant effect and angiotensin I-converting enzyme inhibitory activity), rheological, and water mobility by means of time domain low-field nuclear magnetic resonance were investigated...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29324696/quantitative-assessment-of-antimicrobial-activity-of-plga-films-loaded-with-4-hexylresorcinol
#4
Michael Kemme, Regina Heinzel-Wieland
Profound screening and evaluation methods for biocide-releasing polymer films are crucial for predicting applicability and therapeutic outcome of these drug delivery systems. For this purpose, we developed an agar overlay assay embedding biopolymer composite films in a seeded microbial lawn. By combining this approach with model-dependent analysis for agar diffusion, antimicrobial potency of the entrapped drug can be calculated in terms of minimum inhibitory concentrations (MICs). Thus, the topical antiseptic 4-hexylresorcinol (4-HR) was incorporated into poly(lactic-co-glycolic acid) (PLGA) films at different loadings up to 3...
January 11, 2018: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/29319821/probiotic-potency-of-lactobacillus-plantarum-kx519413-and-kx519414-isolated-from-honey-bee-gut
#5
C Honey Chandran, T R Keerthi
The Indian honey bee-Apis cerana indica, which harbors an abundant and diverse range of lactic acid bacteria (LAB) in their gut with beneficial effects was used as the source for the isolation of LAB. In the present study, two LAB isolates from honey bee gut were selected primarily based on their phenotypic and selective biochemical characterization, further PCR and identified using 16S rRNA sequencing as Lactobacillus plantarum and were registered in National Centre for Biotechnology Information (NCBI) under accession number KX519413 and KX519414...
January 8, 2018: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29319527/identification-of-lactobacillus-delbrueckii-and-streptococcus-thermophilus-strains-present-in-artisanal-raw-cow-milk-cheese-using-real-time-pcr-and-classic-plate-count-methods
#6
Milena A Stachelska
The aim of this paper was to detect Lactobacillus delbrueckii and Streptococcus thermophilus using real-time quantitative PCR assay in 7-day ripening cheese produced from unpasteurised milk. Real-time quantitative PCR assays were designed to identify and enumerate the chosen species of lactic acid bacteria (LAB) in ripened cheese. The results of molecular quantification and classic bacterial enumeration showed a high level of similarity proving that DNA extraction was carried out in a proper way and that genomic DNA solutions were free of PCR inhibitors...
December 4, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/29319514/characterization-of-bacteriocin-producing-lactic-acid-bacteria-isolated-from-native-fruits-of-ecuadorian-amazon
#7
Karina Garzón, Clara Ortega, Gabriela N Tenea
Tropical, wild-type fruits are considered biodiverse "hotspots" of microorganisms with possible functional characteristics to be investigated. In this study, several native lactic acid bacteria (LAB) of Ecuadorian Amazon showing highly inhibitory potential were identified and characterized. Based on carbohydrate fermentation profile and 16S rRNA gene sequencing, seven strains were assigned as Lactobacillus plantarum and one strain as Weissella confusa. Using agar-well diffusion method the active synthetized components released in the neutralized and hydroxide peroxide eliminated cell-free supernatant were inhibited by proteolytic enzymes, while the activity was maintained stable after the treatment with catalase, lysozyme, α-amylase and lipase suggesting their proteinaceous nature...
December 4, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/29317671/bacterial-community-assembly-from-cow-teat-skin-to-ripened-cheeses-is-influenced-by-grazing-systems
#8
Marie Frétin, Bruno Martin, Etienne Rifa, Verdier-Metz Isabelle, Dominique Pomiès, Anne Ferlay, Marie-Christine Montel, Céline Delbès
The objectives of this study were to explore bacterial community assembly from cow teat skin to raw milk cheeses and to evaluate the role of farming systems on this assembly using 16S rRNA gene high-throughput sequencing. The two grazing systems studied (extensive vs. semi-extensive) had a greater effect on the microbiota of cow teat skin than on that of raw milks and cheeses. On teat skin, the relative abundance of several taxa at different taxonomic levels (Coriobacteriia, Bifidobacteriales, Corynebacteriales, Lachnospiraceae, Atopobium, and Clostridium) varied depending on the grazing system and the period (early or late summer)...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29315476/consolidated-bioprocessing-of-lignocellulosic-biomass-to-lactic-acid-by-a-synthetic-fungal-bacterial-consortium
#9
Robert Lawrence Shahab, Jeremy S Luterbacher, Simone Brethauer, Michael Hans-Peter Studer
Consolidated bioprocessing (CBP) of lignocellulosic feedstocks to platform chemicals requires complex metabolic processes, which are commonly executed by single genetically engineered microorganisms. Alternatively, synthetic consortia can be employed to compartmentalize the required metabolic functions among different specialized microorganisms as demonstrated in this work for the direct production of lactic acid from lignocellulosic biomass. We composed an artificial cross-kingdom consortium and co-cultivated the aerobic fungus Trichoderma reesei for the secretion of cellulolytic enzymes with facultative anaerobic lactic acid bacteria...
January 8, 2018: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29307753/tetraglochin-cristatum-britton-roth-a-medicinal-plant-from-the-argentinean-highlands-with-potential-use-in-vaginal-candidiasis
#10
María Alejandra Moreno, Susana Córdoba, Iris Catiana Zampini, María Rosa Alberto, M E Fatima Nader-Macias, Jorge Sayago, Alberto Burgos-Edwards, Guillermo Schmeda-Hirschmann, María Inés Isla
ETHNOPHARMACOLOGICAL RELEVANCE: The Argentinean medicinal plant Tetraglochin cristatum (Britton) Rothm is used in traditional medicine by inhabitants from Argentinean northwestern highlands (Puna) to treat candidiasis and as anti-inflammatory. AIM OF THE STUDY: To assess the potential of the crude drug as an anti-Candida agent with anti-inflammatory properties. The bioactivity and phytochemical composition of a dry extract of the plant was investigated. MATERIAL AND METHODS: A hydroalcoholic dry extract from T...
January 4, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29305511/a-cytoplasmic-antiholin-is-embedded-in-frame-with-the-holin-in-a-lactobacillus-fermentum-bacteriophage
#11
Tingting Guo, Yongping Xin, Chenchen Zhang, Jian Kong
In double-stranded DNA bacteriophages, infection cycles are ended by host cell lysis through the action of phage-encoded endolysins and holins. The precise timing of lysis is regulated by the holin inhibitors, named antiholins. Sequence analysis has revealed that holins with a single transmembrane domain (TMD) are prevalent in Lactobacillus bacteriophages. A temperate bacteriophage of Lbfermentum, ϕPYB5, has a two-component lysis cassette containing endolysin Lyb5 and holin Hyb5. The hyb5 gene is 465-bp long, encoding 154 amino acid residues with an N-terminal TMD and a large cytoplasmic C-terminal domain...
January 5, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29300336/characterization-of-a-potential-probiotic-lactobacillus-brevis-rk03-and-efficient-production-of-%C3%AE-aminobutyric-acid-in-batch-fermentation
#12
Chien-Hui Wu, Yi-Huang Hsueh, Jen-Min Kuo, Si-Jia Liu
Lactic acid bacteria were isolated from fish and evaluated for their γ-aminobutyric acid (GABA)-producing abilities. Out of thirty-two isolates, Lactobacillus brevis RK03 showed the highest GABA production ability. The effects of various fermentation parameters including initial glutamic acid level, culture temperature, initial pH, and incubation time on GABA production were investigated via a singleparameter optimization strategy. For industrial large-scale production, a low-cost GABA producing medium (GM) broth was developed for fermentation with L...
January 4, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29299516/clinical-efficacy-of-a-topical-lactic-acid-bacterial-microbiome-in-chronic-rhinosinusitis-a-randomized-controlled-trial
#13
Anders Mårtensson, Milad Abolhalaj, Malin Lindstedt, Anette Mårtensson, Tobias C Olofsson, Alejandra Vásquez, Lennart Greiff, Anders Cervin
Objective: A locally disturbed commensal microbiome might be an etiological factor in chronic rhinosinusitis (CRS) in general and in CRS without nasal polyps (CRSsNP) in particular. Lactic acid bacteria (LAB) have been suggested to restore commensal microbiomes. A honeybee LAB microbiome consisting of various lactobacilli and bifidobacteria have been found potent against CRS pathogens in vitro. Recently, we examined effects of single nasal administrations of this microbiome in healthy subjects and found it inert...
December 2017: Laryngoscope Investigative Otolaryngology
https://www.readbyqxmd.com/read/29297160/beneficial-protective-role-of-endogenous-lactic-acid-bacteria-against-mycotic-contamination-of-honeybee-beebread
#14
Irakli Janashia, Yvan Choiset, Damian Jozefiak, Franck Déniel, Emmanuel Coton, Ali Akbar Moosavi-Movahedi, Nina Chanishvili, Thomas Haertlé
The purpose of this article is to reveal the role of the lactic acid bacteria (LAB) in the beebread transformation/preservation, biochemical properties of 25 honeybee endogenous LAB strains, particularly: antifungal, proteolytic, and amylolytic activities putatively expressed in the beebread environment have been studied. Seventeen fungal strains isolated from beebread samples were identified and checked for their ability to grow on simulated beebread substrate (SBS) and then used to study mycotic propagation in the presence of LAB...
January 3, 2018: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/29297159/in-vitro-characterization-of-lactic-acid-bacteria-isolated-from-bovine-milk-as-potential-probiotic-strains-to-prevent-bovine-mastitis
#15
Matías S Pellegrino, Ignacio D Frola, Berardo Natanael, Dino Gobelli, María E F Nader-Macias, Cristina I Bogni
Bovine mastitis causes economic losses on dairy farms worldwide. Lactic acid bacteria (LAB) in animal health are an alternative tool to avoid antibiotic therapy on the prevention of bovine mastitis. In previous studies, 12 LAB isolated from bovine milk were selected taking into account some of the following characteristics: hydrophobicity, auto aggregative capability, inhibition of indicator pathogens, hydrogen peroxide, and capsular polysaccharide production. These LAB were considered because of their beneficial properties...
January 2, 2018: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/29295502/physiological-translocation-of-lactic-acid-bacteria-during-pregnancy-contributes-to-the-composition-of-the-milk-microbiota-in-mice
#16
Javier de Andrés, Esther Jiménez, Isabel Chico-Calero, Manuel Fresno, Leónides Fernández, Juan Miguel Rodríguez
The human milk microbiota is a complex and diverse ecosystem that seems to play a relevant role in the mother-to-infant transmission of microorganisms during early life. Bacteria present in human milk may arise from different sources, and recent studies suggest that at least some of them may be originally present in the maternal digestive tract and may reach the mammary gland through an endogenous route during pregnancy and lactation. The objective of this work was to elucidate whether some lactic acid bacteria are able to translocate and colonize the mammary gland and milk...
December 23, 2017: Nutrients
https://www.readbyqxmd.com/read/29290088/influence-of-lactic-acid-bacteria-on-stereoselective-degradation-of-theta-cypermethrin
#17
Kaiwei Shi, Zenglong Chen, Fengmao Liu, Li Li, Longfei Yuan
The purpose of this study was to investigate the influence of four kinds of Lactic acid bacteria (LAB) on stereoselective degradation of theta-cypermethrin (CYP), including Lactobacillus plantarum, Lactobacillus casei, Lactobacillus delbrueckii, and Streptococcus thermophilus. An effective analytical method for (±)-theta-CYP in medium was developed by high-performance liquid chromatography with cellulose tris-(3,5-dimethylphenylcarbamate) chiral stationary phase. theta-Cypermethrin was spiked to LAB medium with different inoculation rates and sampled at 0, 2, 8, 24, 36, 48, 72, 120, 168, and 240 hours...
December 31, 2017: Chirality
https://www.readbyqxmd.com/read/29289381/recombinant-lactococcus-lactis-co-expressing-omph-of-an-m-cell-targeting-ligand-and-ibdv-vp2-protein-provide-immunological-protection-in-chickens
#18
Linlin Liu, Wang Zhang, Yuxin Song, Wenqian Wang, Yuan Zhang, Tingting Wang, Kai Li, Qing Pan, Xiaole Qi, Yulong Gao, Li Gao, Changjun Liu, Yanping Zhang, Yongqiang Wang, Gaoming He, Xiaomei Wang, Hongyu Cui
Infectious bursal disease virus (IBDV) is a highly contagious disease that results in enormous economic losses in the global poultry sector. Lactic acid bacteria are an appealing vehicle for the safe and effective delivery of heterologous protein antigens. Oral administration of the commensal bacterium Lactococcus lactis expressing recombinant fusion proteins has been used to elicit mucosal and systemic immune responses. In this study, a Lactococcus lactis NZ3900 strain co-expressing the outer membrane protein (Omp) H of the microfold (M) cell-targeting ligand and the viral capsid protein (VP)2 antigen of IBDV was genetically engineered, and its immunopotentiating capacity as an oral and injected vaccine in chickens was evaluated...
December 27, 2017: Vaccine
https://www.readbyqxmd.com/read/29288907/effect-of-pomegranate-based-marinades-on-the-microbiological-chemical-and-sensory-quality-of-chicken-meat-a-metabolomics-approach
#19
Anastasia E Lytou, George-John E Nychas, Efstathios Z Panagou
Pomegranate juice is a product with enhanced functional properties that could be used as an alternative to traditional marination ingredients and effectively retard microbial growth along with providing an improved sensory result. In this study, two pomegranate based marinades were prepared for the marination of chicken breast fillets and the marinated samples were aerobically stored at 4 and 10°C for 9days. Raw, non-marinated chicken samples were used as control. Levels of total viable counts (TVC), Pseudomonas spp...
December 21, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29285742/characterisation-of-lactic-acid-bacteria-isolated-from-the-gut-of-cyprinus-carpio-that-may-be-effective-against-lead-toxicity
#20
Sib Sankar Giri, Jin Woo Jun, Saekil Yun, Hyoun Joong Kim, Sang Guen Kim, Jeong Woo Kang, Sang Wha Kim, Se Jin Han, Se Chang Park, V Sukumaran
The present study was conducted to isolate and characterise Pb-resistant lactic acid bacteria (LAB), and thus determine their potential for use as probiotics against Pb toxicity. A total of 107 Pb-resistant LAB strains were isolated from the gut content of Cyprinus carpio, of which 41 were established to be gram-positive and catalase-negative. Investigation of the Pb-binding ability of these isolated LAB identified seven strains (P2, P6, P7, P9, P16, P19 and P22) with comparatively high Pb-binding activities...
December 28, 2017: Probiotics and Antimicrobial Proteins
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