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https://www.readbyqxmd.com/read/28813004/lactose-binding-induces-opposing-dynamics-changes-in-human-galectins-revealed-by-nmr-based-hydrogen-deuterium-exchange
#1
Chih-Ta Henry Chien, Meng-Ru Ho, Chung-Hung Lin, Shang-Te Danny Hsu
Galectins are β-galactoside-binding proteins implicated in a myriad of biological functions. Despite their highly conserved carbohydrate binding motifs with essentially identical structures, their affinities for lactose, a common galectin inhibitor, vary significantly. Here, we aimed to examine the molecular basis of differential lactose affinities amongst galectins using solution-based techniques. Consistent dissociation constants of lactose binding were derived from nuclear magnetic resonance (NMR) spectroscopy, intrinsic tryptophan fluorescence, isothermal titration calorimetry and bio-layer interferometry for human galectin-1 (hGal1), galectin-7 (hGal7), and the N-terminal and C-terminal domains of galectin-8 (hGal8(NTD) and hGal8(CTD), respectively)...
August 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28811799/diversity-physiochemical-and-phylogenetic-analyses-of-bacteria-isolated-from-various-drinking-water-sources
#2
Neveen H Eid, Huda A Al Doghaither, Taha A Kumosani, Munazza Gull
OBJECTIVE: To evaluate the indigenous bacterial strains of drinking water from the most commercial water types including bottled and filtered water that are currently used in Saudi Arabia. METHODS: Thirty randomly selected commercial brands of bottled water were purchased from Saudi local markets. Moreover, samples from tap water and filtered water were collected in sterilized glass bottles and stored at 4°C. Biochemical analyses including pH, temperature, lactose fermentation test (LAC), indole test (IND), methyl red test (MR), Voges-Proskauer test (VP), urease test (URE), catalase test (CAT), aerobic and anaerobic test (Ae/An) were measured...
May 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28807538/lactose-malabsorption-and-taste-aversion-learning
#3
Joe Arthurs, Jian-You Lin, Roberto Ocampo, Steve Reilly
Consumption of foods can be suppressed by two feeding system defense mechanisms: conditioned taste aversion (CTA) or taste avoidance learning (TAL). There is a debate in the literature about which form of intake suppression is caused by various aversive stimuli. For instance, illness-inducing stimuli like lithium chloride are the gold standard for producing CTA and external (or peripheral) painful stimuli, such as footshock, are the traditional model of TAL. The distinction between CTA and TAL, which have identical effects on intake, is based on differential effects on palatability...
August 11, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28806296/the-risk-of-necrotizing-enterocolitis-differs-among-preterm-pigs-fed-formulas-with-either-lactose-or-maltodextrin
#4
Randal K Buddington, Samantha L Davis, Karyl K Buddington
OBJECTIVES: When breast milk is unavailable for preterm infants, formulas are needed that won't increase the risk of necrotizing enterocolitis (NEC). Adding novel ingredients to formula to reduce NEC has not been effective clinically. Instead, we tested the prediction that NEC can be reduced by removing the maltodextrin now included in preterm formulas. METHODS: The preterm pig model of spontaneous NEC was used to evaluate growth, health, and intestinal responses to 6-7 days of feeding formulas that were identical except for the source of carbohydrate; either 100% lactose or maltodextrin; colostrum was used as the control...
August 11, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28805889/oxytocin-injections-in-the-postpartal-period-affect-mammary-tight-junctions-in-sows
#5
C Farmer, M Lessard, C H Knight, H Quesnel
The potential impacts of injecting oxytocin (OXY) to sows in the early postpartum period on the quality of mammary tight junctions, milk composition, and immune status of sows and piglets were studied. Postparturient sows received i.m. injections of either saline (control [CTL]; = 10) or 75 IU of OXY ( = 10). Injections were given twice daily (0800 and 1630 h) starting on d 2 of lactation (i.e., between 12 and 20 h after birth of the last piglet), totaling 4 injections. Milk samples were obtained before the first injection (d 2 morning [AM]), before the second injection (d 2 afternoon [PM]), and on d 4 PM and d 5 PM...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28805274/quantitative-characterization-of-galectin-3-c-affinity-mass-spectrometry-measurements-comprehensive-data-analysis-obstacles-shortcuts-and-robustness
#6
Marko Haramija, Jasna Peter-Katalinić
RATIONALE: Affinity mass spectrometry (AMS) is an emerging tool in the field of study of protein-carbohydrate complexes. However, experimental obstacles and data analysis is preventing faster integration of AMS methods in the field of glycosciences. Here we show how analysis of direct ESI-MS AMS data can be simplified for screening purposes, even for complex AMS spectra. METHODS: Direct ESI-MS assay was tested in this study, and binding data for the galectin-3C•lactose complex were analyzed using comprehensive and simplified data analysis approach...
August 14, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28803479/design-of-cyclic-peptides-based-glucose-receptors-and-their-application-in-glucose-sensing
#7
Chao Li, Xin Chen, Fuyuan Zhang, Xingxing He, Guozhen Fang, Jifeng Liu, Shuo Wang
Glucose assay is of great scientific significance in clinical diagnostics and bioprocess monitoring and to design new glucose receptor is necessary for development of more sensitive, selective and robust glucose detection techniques. Herein, a series of cyclic peptides (CPs) glucose receptor were designed to mimic the binding sites of glucose binding protein (GBP) and CPs' sequence contained amino acid sites Asp, Asn, His, Asp, Arg, which constituted the first layer interactions of GBP. The properties of these CPs used as a glucose receptor or substitute for the GBP were studied by using quartz crystal microbalance (QCM) technique...
August 14, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28801371/small-intestinal-bacterial-overgrowth-may-increase-the-likelihood-of-lactose-and-sorbitol-but-not-fructose-intolerance-false-positive-diagnosis
#8
Tsachi Tsadok Perets, Dalal Hamouda, Olga Layfer, Olga Ashorov, Doron Boltin, Sigal Levy, Yaron Niv, Ram Dickman
BACKGROUND: Small intestinal bacterial overgrowth (SIBO) is defined as a bacterial count of more than 10(5) colony-forming units per milliliter in duodenal aspirate. It shares many symptoms with carbohydrate intolerance, which makes the clinical distinction of the disorders difficult. The aim of the study was to examine the relationship between a positive carbohydrate breath test and the presence of SIBO suggested by a positive lactulose hydrogen breath test. METHODS: The electronic database of the gastroenterology laboratory of a tertiary medical center was searched for all patients clinically tested for SIBO in 2012-2013 for whom previous results for lactose, fructose, and/or sorbitol breath test were available...
August 2017: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/28797814/the-roles-and-mechanisms-of-homogalacturonan-and-rhamnogalacturonan-i-pectins-on-the-inhibition-of-cell-migration
#9
Yuying Fan, Lin Sun, Siwen Yang, Congcong He, Guihua Tai, Yifa Zhou
Our previous paper reported the structure of ginseng pectic polysaccharides related to the cell migration inhibitory effects, but the underlying mechanisms are poorly understood. In this manuscript, rhamnogalacturonan I (RGI)-rich pectins prepared from ginseng pectin were investigated for their effect on cell migration. The results indicated that the combination of homogalacturonan (HG) and RGI-rich pectins exerted stronger effects than either HG- or RGI-rich pectin alone. Further studies revealed that the effects of HG- and RGI-rich pectins were dependent on pretreatment, which caused alterations in cell morphologies such as cell size and shape, focal adhesion, and the organization of actin filaments, suggesting that HG and RGI pectins exert synergistic effects on cell migration, likely through different ways...
August 7, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28794927/development-of-functional-fermented-whey-oat-based-product-using-probiotic-bacteria
#10
Poorva Sharma, Neetika Trivedi, Yogesh Gat
The aim of the present study was to formulate a fermented whey product using probiotic bacteria and whey protein concentrate (WPC containing 70% of proteins) to obtain a fermented product with low lactose and β-lactoglobulin (BLG) content. Several factors such as starter culture concentration (1, 5, and 10%) and fermentation time (2, 4, 6, 8, and 10 h) were optimized on the basis of growth activity in terms of viable count, pH, and acidity. Starter culture concentration and fermentation time of 5% and 10 h, respectively, show the optimal viable count (9...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28794904/qbd-based-approach-for-optimization-of-tenofovir-disoproxil-fumarate-loaded-liquid-crystal-precursor-with-improved-permeability
#11
Sharvil Patil, Chandrashekhar Kadam, Varsha Pokharkar
BCS class III drugs suffer from a drawback of low permeability even though they have high aqueous solubility. The objective of current work was to screen the suitability of glyceryl monooleate (GMO)/Pluronic F127 cubic phase liquid crystals precursors for permeation enhancement and in turn the bioavailability of tenofovir disoproxil fumarate (TDF), a BCS class III drug. Spray-drying method was used for preparation of TDF loaded liquid crystal precursors (LCP) consisting of GMO/Pluronic F127 and lactose monohydrate with an ability to in situ transform into stable cubic phases upon hydration...
November 2017: Journal of Advanced Research
https://www.readbyqxmd.com/read/28793770/assessment-of-in-vitro-digestibility-of-dietary-carbohydrates-using-rat-small-intestinal-extract
#12
Alvaro Ferreira-Lazarte, Agustin Olano, Mar Villamiel, F Javier Moreno
There are few studies on the assessment of digestibility of non-digestible carbohydrates, despite their increasingly important role in human health. In vitro digestibility of a range of dietary carbohydrates classified as digestible (maltose, sucrose and lactose), well-recognized (lactulose, fructooligosaccharides (FOS) and two types of galactooligosaccharides (GOS) differing in the predominant glycosidic linkage) and potential (lactosucrose and GOS from lactulose, OsLu) prebiotics using a rat small intestinal extract (RSIE) under physiological conditions of temperature and pH is described...
August 10, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28789885/ultra-thin-hydro-films-based-on-lactose-crosslinked-fish-gelatin-for-wound-healing-applications
#13
Alaitz Etxabide, Claudia Vairo, Edorta Santos-Vizcaino, Pedro Guerrero, Jose Luis Pedraz, Manoli Igartua, Koro de la Caba, Rosa Maria Hernandez
This study focuses on the development and characterization of an ultra thin hydro-film based on lactose-mediated crosslinking of fish gelatin by Maillard reaction. Lactose results in the only efficient crosslinker able to produce resistant to handling hydro-films when compared to conventional crosslinkers such as glutaraldehyde or genipin (tested at 25 and 37°C in phosphate buffer saline solution (PBS)).The disappearance of the peak related to the N-containing groups (XPS) and the images obtained by SEM and AFM demonstrate the highly ordered nano-scaled structure of lactose-crosslinked gelatin, confirming the crosslinking efficiency...
August 5, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28780092/whole-body-propionate-and-glucose-metabolism-of-multiparous-dairy-cows-receiving-folic-acid-and-vitamin-b12-supplements
#14
M Duplessis, H Lapierre, B Ouattara, N Bissonnette, D Pellerin, J-P Laforest, C L Girard
This study was undertaken to evaluate the effect of supplementation of folic acid and vitamin B12 on glucose and propionate metabolism. Twenty-four multiparous cows were assigned according to a complete block design in a 2 × 2 factorial arrangement to one of the following treatments: (1) saline 0.9% NaCl, (2) 320 mg of folic acid, (3) 10 mg of vitamin B12, or (4) 320 mg of folic acid and 10 mg of vitamin B12. Intramuscular injections were given weekly from 3 wk before the expected calving date until 9 wk postpartum...
August 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28776872/changes-in-some-blood-parameters-milk-composition-and-yield-of-buffaloes-bubalus-bubalis-during-the-transition-period
#15
Enrico Fiore, Sonia Giambelluca, Massimo Morgante, Barbara Contiero, Elisa Mazzotta, Domenico Vecchio, Irene Vazzana, Pasquale Rossi, Francesca Arfuso, Giuseppe Piccione, Matteo Gianesella
In this study changes in hematochemical parameters, milk composition and yield were investigated in buffaloes during the transition period. A total of 93 buffaloes 113.9 ± 8.03 months old and 535 ± 50 kg average body weight were used. Parity was recorded, blood samples were collected from 80 days pre-partum until 70 days post-partum; milk samples were collected from 5 days to 70 days post-partum. On serum samples, the values of non-esterified fatty acids, β-hydroxybutyrate, glucose, cholesterol, triglycerides, aspartate aminotransferase, alanine aminotransferase, gamma-glutamyltransferase, urea, total proteins were evaluated...
August 4, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28774481/streptococcus-uberis-in-vitro-biofilm-production-in-response-to-carbohydrates-and-skim-milk
#16
Silvana A Dieser, Aluminé S Fessia, Miriam P Ferrari, Claudia G Raspanti, Liliana M Odierno
Streptococcus uberis has become one of the most important environmental pathogens associated with clinical and subclinical bovine mastitis. Biofilm confers to bacteria more resistance to physical and chemical agents as well as to different mechanisms of the innate immune system. The aim of this work was to evaluate the ability of in vitro biofilm production in 32 S. uberis isolates from bovine mastitis and identified by biochemical tests and subsequently confirmed by the amplification of the pauA gene. The isolates were cultivated in TMP broth and TMP broth with the addition of 0...
July 31, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/28773204/on-identification-of-critical-material-attributes-for-compression-behaviour-of-pharmaceutical-diluent-powders
#17
Jianyi Zhang, Chuan-Yu Wu, Xin Pan, Chuanbin Wu
As one of the commonly-used solid dosage forms, pharmaceutical tablets have been widely used to deliver active drugs into the human body, satisfying patient's therapeutic requirements. To manufacture tablets of good quality, diluent powders are generally used in formulation development to increase the bulk of formulations and to bind other inactive ingredients with the active pharmaceutical ingredients (APIs). For formulations of a low API dose, the drug products generally consist of a large fraction of diluent powders...
July 23, 2017: Materials
https://www.readbyqxmd.com/read/28772952/the-effects-of-relative-humidity-on-the-flowability-and-dispersion-performance-of-lactose-mixtures
#18
Xiang-Yun Lu, Lan Chen, Chuan-Yu Wu, Hak-Kim Chan, Tim Freeman
The flowability and dispersion behavior are two important physicochemical properties of pharmaceutical formulations for dry powder inhalers (DPIs). They are usually affected by the environmental conditions, such as temperature and relative humidity (RH). However, very few studies have been focused on the relationship between the two properties and their dependence on RH during storage. In this research, model pharmaceutical formulations were prepared using mixtures of coarse and fine lactose. The fractions of fines in the mixtures were 0%, 5%, 10%, and 20%, respectively...
May 29, 2017: Materials
https://www.readbyqxmd.com/read/28768941/a-method-for-decreasing-the-amount-of-the-drug-remaining-on-the-surfaces-of-the-mortar-and-pestle-after-grinding-small-amount-of-tablets
#19
Miki Kawakami, Rika Kitada, Takuro Kurita, Tadakazu Tokumura
 The aim of the present study was to develop a method for grinding tablets with a mortar and pestle while reducing drug loss because grinding tablets is known to be associated with reductions in tablet weight and loss of the active drug. Seven kinds of tablets were subjected to grinding. The proportion (%) of the amount of the active drug in the powder remaining on the surfaces of the mortar and pestle relative to the total amount of the drug recovered (the recovery percent) was calculated. The recovery percent of the 7 kinds of tablets ranged from 17...
2017: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/28764968/production-of-human-milk-oligosaccharides-by-enzymatic-and-whole-cell-microbial-biotransformations
#20
Georg A Sprenger, Florian Baumgärtner, Christoph Albermann
Human milk oligosaccharides (HMO) are almost unique constituents of breast milk and are not found in appreciable amounts in cow milk. Due to several positive aspects of HMO for the development, health, and wellbeing of infants, production of HMO would be desirable. As a result, scientist from different disciplines have developed methods for the preparation of single HMO compounds. Here, we review approaches to HMO preparation by (chemo-)enzymatic syntheses or by whole-cell biotransformation with recombinant bacterial cells...
July 29, 2017: Journal of Biotechnology
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