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https://www.readbyqxmd.com/read/28741666/assessment-of-the-potential-of-the-multi-enzyme-producer-bacillus-amyloliquefaciens-us573-as-alternative-feed-additive
#1
Ameny Farhat-Khemakhem, Monia Blibech, Ines Boukhris, Mohamed Makni, Hichem Chouayekh
BACKGROUND: Recently, probiotics have increasingly been used as feed additives in poultry diets as an alternative to antibiotic growth promoters fostering resistance development. RESULTS: This study was aimed at assessing the potential of Bacillus amyloliquefaciens US573 as a direct-fed microbial. The US573 strain was found to be free of harmful enzymatic activities and sensitive to antibiotics. In addition, it showed a good acid and bovine bile tolerance, high adhesion efficacy to chicken enterocytes, and an ability to form biofilms, which may favor its survival and persistence in the animal gastrointestinal tract...
July 25, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28741116/application-of-multivariate-curve-resolution-alternate-least-square-technique-on-extracting-pure-spectral-components-from-multiple-emitting-systems-a-case-study
#2
Madhumita Tarai, Ashok Kumar Mishra
Multiple emitting components in a fluorophoric system often produce complicated emission spectra. Extracting the individual spectral information from the composite spectra is important in order to comprehend the photophysical processes occurring in the multifluorophoric systems. Although the combination of Principal Component Analysis and Multivariate Curve Resolution-Alternate Least Square (PCA/MCR-ALS) technique is a well-known approach for curve deconvolution, its applicability in the spectral deconvolution of vibronically and electronically mixed up emitting systems as well as systems merged up with multiple electronic bands without a priori knowledge of the individual emitting species, is not properly studied...
July 24, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28739210/bile-salt-stimulated-lipase-inhibition-by-phospholipids-and-relief-by-phospholipase-a2
#3
Elena Venuti, Dmitry Shishmarev, Philip W Kuchel, Shoma Dutt, Caron S Blumenthal, Kevin J Gaskin
INTRODUCTION: Bile salt stimulated lipase (BSSL; Enzyme Commission (EC) number 3.1.1.13) has been a candidate triglyceridase for improving enzyme therapy for pancreatic insufficiency; however, its efficacy is near absent. We hypothesise that similarly to pancreatic lipase, BSSL is inhibited by phospholipids and this inhibition is relieved by Phospholipase A2 (PLA2; EC 3.1.1.4), and the present study was undertaken to explore this possibility. MATERIALS AND METHODS: Synthetic emulsions of triglyceride and phosphatidylcholine (PC) or lysophosphatidylcholine (LPC)/bile salt mixed micelles were used as a model of intestinal digestion-media...
July 21, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28737387/self-assembly-of-lecithin-and-bile-salt-in-the-presence-of-inorganic-salt-in-water-mesoscale-computer-simulation
#4
Anastasia A Markina, Viktor A Ivanov, Pavel V Komarov, Alexei R Khokhlov, Shih-Huang Tung
The influence of inorganic salt on the structure of lecithin/bile salt mixtures in aqueous solution is studied by means of dissipative particle dynamics simulations. We propose a coarse-grained model of phosphatidylcholine and two types of bile salts (sodium cholate and sodium deoxycholate), and also take into account the presence of low molecular weight salt. This model allows us to study the system on rather large time and length scales (up to about ~20 µs and 50 nm) and to reveal mechanisms of experimentally observed increasing of viscosity upon increasing the low molecular weight salt concentration in this system...
July 24, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28734600/tracking-amazonian-cheese-microbial-diversity-development-of-an-original-sustainable-and-robust-starter-by-freeze-drying-spray-drying
#5
A A Ferreira, S Huang, Í T Perrone, P Schuck, G Jan, A F Carvalho
The Marajó cheese made with raw buffalo milk in the Amazon region of Brazil can be considered a good source of wild lactic acid bacteria strains with unexplored and promising characteristics. The aim of this study was to develop a potential probiotic starter culture for industrial applications using freeze drying and spray drying. A decrease in the survival rates of freeze-dried samples compared with spray-dried samples was noted. The spray-dried cultures remained approximately 10(9) cfu·g(-1), whereas the freeze-dried samples showed 10(7) cfu·g(-1) after 60 d of storage at 4°C...
July 19, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28733223/sequencing-of-fic1-bsep-and-mdr3-in-a-large-cohort-of-patients-with-cholestasis-revealed-a-high-number-of-different-genetic-variants
#6
Carola Dröge, Michele Bonus, Ulrich Baumann, Caroline Klindt, Elke Lainka, Simone Kathemann, Florian Brinkert, Enke Grabhorn, Eva-Doreen Pfister, Daniel Wenning, Alexander Fichtner, Daniel N Gotthardt, Karl Heinz Weiss, Patrick McKiernan, Ratna Dua Puri, I C Verma, Stefanie Kluge, Holger Gohlke, Lutz Schmitt, Ralf Kubitz, Dieter Häussinger, Verena Keitel
BACKGROUND&AIMS: The bile salt export pump (BSEP, ABCB11), multidrug resistance protein 3 (MDR3, ABCB4) and the ATPase familial intrahepatic cholestasis 1 (FIC1, ATP8B1) mediate bile formation. Mutations in these genes underlie cholestatic liver diseases ranging from intrahepatic cholestasis of pregnancy, benign recurrent intrahepatic cholestasis or low phospholipid-associated cholelithiasis to progressive familial intrahepatic cholestasis. METHODS: Coding exons with flanking intron regions of ATP8B1, ABCB11, and ABCB4 were sequenced in cholestatic patients with assumed genetic cause...
July 18, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28719350/characterization-of-candidate-probionts-isolated-from-human-breast-milk
#7
S Khalkhali, N Mojgani
This study was designed to isolate and identify the potential probionts present in 32 healthy mothers' breast milk. Microbial culture media and 16SrRNA sequencing were used to isolate and identify the bacteria and all isolates were analyzed for their antagonistic potential, resistance to acidic pH, bile salts and survival under simulated gastric and intestinal conditions. The colonization potential was further assessed based on adherence to human enterocyte-like Caco-2 cell lines. The breast milk samples harbored significant numbers of Gram positive and catalase negative (85%) bacteria...
May 20, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28711706/haemolytic-activity-of-formyl-and-acetyl-derivatives-of-bile-acids-and-their-gramine-salts
#8
Weronika Kozanecka-Okupnik, Beata Jasiewicz, Tomasz Pospieszny, Monika Matuszak, Lucyna Mrówczyńska
Bile acids (lithocholic: LCA, deoxycholic: DCA and cholic: CA) and their formyl- and acetyl- derivatives can be used as starting material in chemical synthesis of compounds with different biological activity strongly depended on their chemical structures. Our previous studies showed that biological activity of bile acids salts with gramine toward human erythrocytes was significantly different from the activity of bile acids alone. Moreover, gramine effectively modified the membrane perturbing activity of other steroids...
July 12, 2017: Steroids
https://www.readbyqxmd.com/read/28704538/intestinal-calcium-and-bile-salts-facilitate-germination-of-clostridium-difficile-spores
#9
Travis J Kochan, Madeline J Somers, Alyssa M Kaiser, Michelle S Shoshiev, Ada K Hagan, Jessica L Hastie, Nicole P Giordano, Ashley D Smith, Alyxandria M Schubert, Paul E Carlson, Philip C Hanna
Clostridium difficile (C. difficile) is an anaerobic gram-positive pathogen that is the leading cause of nosocomial bacterial infection globally. C. difficile infection (CDI) typically occurs after ingestion of infectious spores by a patient that has been treated with broad-spectrum antibiotics. While CDI is a toxin-mediated disease, transmission and pathogenesis are dependent on the ability to produce viable spores. These spores must become metabolically active (germinate) in order to cause disease. C. difficile spore germination occurs when spores encounter bile salts and other co-germinants within the small intestine, however, the germination signaling cascade is unclear...
July 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28694218/constitutive-expression-of-human-gastric-lipase-in-pichia-pastoris-and-site-directed-mutagenesis-of-key-lid-stabilizing-residues
#10
Laura Sams, Sawsan Amara, Almahdi Chakroun, Sébastien Coudre, Julie Paume, Jacqueline Giallo, Frédéric Carrière
The cDNA encoding human gastric lipase (HGL) was integrated into the genome of Pichia pastoris using the pGAPZα A transfer vector. The HGL signal peptide was replaced by the yeast α-factor to achieve an efficient secretion. Active rHGL was produced by the transformed yeast but its levels and stability were dependent on the pH. The highest activity was obtained upon buffering the culture medium at pH5, a condition that allowed preserving enzyme activity over time. A large fraction (72±2%) of secreted rHGL remained however bound to the yeast cells, and was released by washing the cell pellet with an acid glycine-HCl buffer (pH2...
July 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28689989/the-long-variant-of-human-ileal-bile-acid-binding-protein-associated-with-colorectal-cancer-exhibits-sub-cellular-localization-and-lipid-binding-behaviour-distinct-from-those-of-the-common-isoform
#11
Mariapina D'Onofrio, Serena Zanzoni, Francesca Munari, Hugo L Monaco, Michael Assfalg, Stefano Capaldi
BACKGROUND: Ileal bile acid-binding protein, IBABP, participates in the intracellular trafficking of bile salts and influences their signaling activities. The recently discovered variant, IBABP-L, bearing an N-terminal 49-amino acid extension, was found to be associated with colorectal cancer and to protect cancer cells from the cytotoxic effects of deoxycholate. However, the precise function and the molecular properties of this variant are currently unknown. METHODS: Bioinformatics tools and confocal microscopy were used to investigate the sub-cellular localization of IBABP-L; protein dynamics, ligand binding and interaction with membrane models were studied by 2D NMR and fluorescence spectroscopy...
July 6, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28688954/rifampicin-induced-injury-in-hepg2-cells-is-alleviated-by-tudca-via-increasing-bile-acid-transporters-expression-and-enhancing-the-nrf2-mediated-adaptive-response
#12
Weiping Zhang, Lihong Chen, Hui Feng, Wei Wang, Yi Cai, Fen Qi, Xiaofang Tao, Jun Liu, Yujun Shen, Xiaofei Ren, Xi Chen, Jianming Xu, Yuxian Shen
Bile acid transporters and the nuclear factor erythroid 2-related factor (Nrf-2)-mediated adaptive response play important roles in the development of drug-induced liver injury (DILI). However, little is known about the contribution of the adaptive response to rifampicin (RFP)-induced cell injury. In this study, we found RFP decreased the survival rate of HepG2 cells and increased the levels of lactate dehydrogenase (LDH), alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (AKP), γ-glutamyl-transferase (γ-GT), total bilirubin (TBIL), direct bilirubin (DBIL), indirect bilirubin (IBIL), total bile acid (TBA) and adenosine triphosphate (ATP) in the cell culture supernatants in both a concentration- and a time-dependent manner...
July 6, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28687035/effect-of-eudragit-s100-nanoparticles-and-alginate-chitosan-encapsulation-on-the-viability-of-lactobacillus-acidophilus-and-lactobacillus-rhamnosus
#13
Fereshteh Ansari, Hadi Pourjafar, Vahid Jodat, Javad Sahebi, Amir Ataei
In this study, we examined a novel method of microencapsulation with calcium alginate-chitosan and Eudragit S100 nanoparticles for the improving viability of probiotic bacteria, Lactobacillus acidophilus and Lactobacillus rhamnosus. Extrusion technique was carried out in microencapsulation process. The viability of two probiotics in single coated beads (with only chitosan), double coated beads (with chitosan and Eudragit nanoparticles), and as free cells (unencapsulated) were conducted in simulated gastric juice (pH 1...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28682367/metallogels-of-indium-iii-with-bile-salts-soft-materials-for-nanostructured-in2s3-synthesis
#14
Mitasree Maity, Uday Maitra
This work describes sonication mediated facile metallo-hydrogel formation from biodetergents sodium cholate and deoxycholate in the presence of indium(iii). The resulting thermo-irreversible gels behaved as viscoelastic soft solids as observed by rheological measurements. Scanning electron and atomic force microscopy analysis revealed the transition from spherical aggregates before gelation to typical entangled three-dimensional fibrous networks in gels. The In-Ch hydrogel was further used to prepare nanostructured In2S3 in which the cholate units acted as surfactants to limit the growth of the nanoflakes...
July 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28662472/stepwise-unfolding-of-ribonuclease-a-by-a-biosurfactant
#15
Bijan K Paul, Riya Sett, Nikhil Guchhait
The interaction of Ribonuclease A (RNase A) with the bile salt, sodium deoxycholate (NaDC) is meticulously investigated using various spectroscopic techniques. The binding isotherm constructed from the modulation of intrinsic tyrosine fluorescence of the protein following interaction with NaDC conspicuously reveals an intrinsically complex stepwise interaction process which proceeds through the formation of distinct conformational states of the protein. The conformational transitions are found to occur at c1=2...
June 19, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28657593/spectroscopic-investigation-of-the-interaction-of-the-anticancer-drug-mitoxantrone-with-sodium-taurodeoxycholate-natdc-and-sodium-taurocholate-natc-bile-salts
#16
Mirela Enache, Ana Maria Toader, Victoria Neacsu, Gabriela Ionita, Madalin I Enache
The focus of the present work was to investigate the interaction of the anticancer drug mitoxantrone with two bile salts, sodium taurodeoxycholate (NaTDC) and sodium taurocholate (NaTC). Ultraviolet-visible (UV-Vis) absorption and electron paramagnetic resonance (EPR) spectroscopy were used to quantify the interaction and to obtain information on the location of mitoxantrone in bile salt micelles. The presence of submicellar concentrations of both bile salts induces mitoxantrone aggregation and the extent of drug aggregation in NaTDC is higher than in NaTC...
June 28, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28651681/no-influence-of-supplemental-dietary-calcium-intake-on-the-bioavailability-of-spinach-carotenoids-in-humans
#17
Joana Corte-Real, Cédric Guignard, Manon Gantenbein, Bernard Weber, Kim Burgard, Lucien Hoffmann, Elke Richling, Torsten Bohn
Dietary carotenoid intake, especially from fruits and vegetables, has been associated with a reduced incidence of several chronic diseases. However, its bioavailability can vary, depending on the food matrix and host factors. Recently, it has been suggested that divalent minerals negatively impinge on carotenoid bioavailability by reducing bile-salt and non-esterified fatty-acid levels in the gut, which normally aid in emulsifying carotenoids. The aim of the present study was to investigate whether supplemental Ca would negatively influence carotenoid absorption in humans...
June 27, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28648257/a-capillary-micellar-electrokinetic-chromatography-method-for-the-stereoselective-quantitation-of-bioallethrin-in-biotic-and-abiotic-samples
#18
Mª Ángeles García, Nuria Menéndez-López, Karina Boltes, María Castro-Puyana, Mª Luisa Marina
A capillary micellar electrokinetic chromatography (MEKC) method was developed enabling the stereoselective separation of the insecticide bioallethrin. The use of sodium deoxycholate bile salt and acetyl-β-cyclodextrin (acetyl-β-CD) made possible the separation of bioallethrin stereoisomers with a high enantioresolution (7.4) in a short analysis time (6.5min). The analytical characteristics of the developed method were evaluated in terms of linearity, accuracy, precision, and limits of detection (LOD) and quantitation (LOQ) showing a good performance for the quantitation of bioallethrin stereoisomers with LODs of 0...
August 11, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28645914/bile-salt-homeostasis-in-normal-and-bsep-gene-knock-out-rats-with-single-and-repeated-doses-of-troglitazone
#19
Yaofeng Cheng, Shenjue Chen, Chris Freeden, Weiqi Chen, Yueping Zhang, Pamela Abraham, David Nelson, William G Humphreys, Jinpin Gan, Yurong Lai
The interference of bile acid secretion through bile salt export pump (BSEP) inhibition was one of the mechanisms for troglitazone (TGZ) induced hepatotoxicity. Here we investigated the impact of single or repeated oral doses of TGZ (200 mg/kg/day, 7 days) on bile acid homoeostasis in wild-type (WT) and Bsep KO rats. Following oral doses, plasma exposures of TGZ were not different between WT and KO rats, and were similar on Day-1 and Day-7. However, plasma exposures of the major metabolite, troglitazone sulfate (TS), in KO rats were 7...
June 23, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28645651/post-transplant-cholangiopathy-classification-pathogenesis-and-preventive-strategies
#20
REVIEW
Yvonne de Vries, Fien A von Meijenfeldt, Robert J Porte
Biliary complications are the most frequent cause of morbidity, re-transplantation, and even mortality after liver transplantation. In general, biliary leakage and anastomotic and non-anastomotic biliary strictures (NAS) can be recognized. There is no consensus on the exact definition of NAS and different names and criteria have been used in literature. We propose to use the term post-transplant cholangiopathy for the spectrum of abnormalities of large donor bile ducts, that includes NAS, but also intraductal casts and intrahepatic biloma formation, in the presence of a patent hepatic artery...
June 20, 2017: Biochimica et Biophysica Acta
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