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https://www.readbyqxmd.com/read/28823059/influence-of-dextrins-on-the-production-of-spiramycin-and-impurity-components-by-streptomyces-ambofaciens
#1
Kaiya Yao, Shuhong Gao, Yanjie Wu, Zhen Zhao, Wen Wang, Quangui Mao
Spiramycin is a 16-membered macrolide antibiotic produced by Streptomyces ambofaciens and used in human medicine for the treatment of various respiratory tract and genital infections. Several impurities were detected in spiramycin-fermentation broth, especially impurities D and F, which decreased the separation-extraction yield and increased production cost. Dextrins, as the main carbon source, influence the accumulation of spiramycin and impurities. In this work, two types of dextrin from vendor Y and Z were compared to study their influences on spiramycin production...
August 19, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28822907/leaf-carbohydrates-influence-transcriptional-and-post-transcriptional-regulation-of-nocturnal-carboxylation-and-starch-degradation-in-the-facultative-cam-plant-mesembryanthemum-crystallinum
#2
Tahar Taybi, John C Cushman, Anne M Borland
Nocturnal degradation of transitory starch is a limiting factor for the optimal function of crassulacean acid metabolism and must be coordinated with phosphoenolypyruvate carboxylase (PEPC)-mediated CO2 uptake to optimise carbon gain over the diel cycle. The aim of this study was to test the hypothesis that nocturnal carboxylation is coordinated with starch degradation in CAM via a mechanism whereby the products of these pathways regulate diel transcript abundance and enzyme activities for both processes. To test this hypothesis, a starch and CAM-deficient mutant of Mesembryanthemum crystallinum was compared with wild type plants under well-watered and saline (CAM-inducing) conditions...
August 5, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28821318/consumption-of-an-acid-protease-derived-from-aspergillus-oryzae-causes-bifidogenic-effect-in-rats
#3
Yongshou Yang, Akane Iwamoto, Thanutchaporn Kumrungsee, Yukako Okazaki, Manabu Kuroda, Shotaro Yamaguchi, Norihisa Kato
A marked elevation in the abundance of Bifidobacterium was found in the cecum of rats that were fed a high-fat diet supplemented with an Amano protease preparation (derived from Aspergillus oryzae). The protease preparation contains several digestive enzymes, including acid protease (AcP), alkaline protease, and amylase. We hypothesized that the elevation in the abundance of Bifidobacterium by Amano protease preparation is associated with the digestive enzymes involved in the protease preparation. To test this hypothesis, this study was conducted to investigate if such bifidogenic effect is because of the AcP...
August 2017: Nutrition Research
https://www.readbyqxmd.com/read/28819794/in-vitro-selection-and-identification-of-potential-probiotics-isolated-from-the-gastrointestinal-tract-of-nile-tilapia-oreochromis-niloticus
#4
Rasha M Reda, Khaled M Selim, Hassanin M El-Sayed, M A El-Hady
Fish gut bacteria can be used as probiotics for aquaculture. The aim of this study is to screen and identify beneficial probiotic bacteria from the gut of Nile tilapia, Oreochromis niloticus. Nine out of one hundred thirty-five isolates were non-pathogenic through intraperitoneal injection and had antibacterial activities with at least a strain from the five isolated fish pathogens, Aeromonas sobria, Aeromonas hydrophila, Pseudomonas aeruginosa, Pseudomonas putida, and Staphylococcus aureus. Further tests showed that such isolates can survive in the presence of high bile concentration (10%) and at different acidic pH values...
August 17, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28819233/biology-physiology-and-gene-expression-of-grasshopper-oedaleus-asiaticus-exposed-to-diet-stress-from-plant-secondary-compounds
#5
Xunbing Huang, Jingchuan Ma, Xinghu Qin, Xiongbing Tu, Guangchun Cao, Guangjun Wang, Xiangqun Nong, Zehua Zhang
We studied the role of plant primary and secondary metabolites in mediating plant-insect interactions by conducting a no-choice single-plant species field experiment to compare the suitability, enzyme activities, and gene expression of Oedaleus asiaticus grasshoppers feeding on four host and non-host plants with different chemical traits. O. asiaticus growth showed a positive relationship to food nutrition content and a negative relationship to secondary compounds content. Grasshopper amylase, chymotrypsin, and lipase activities were positively related to food starch, crude protein, and lipid content, respectively...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819193/experiments-suggesting-extra-digestive-effects-of-enteral-pancreatic-amylase-and-its-peptides-on-glucose-homeostasis-in-a-pig-model
#6
Stefan G Pierzynowski, Kateryna Goncharova, Peter C Gregory, Björn Weström, Sergiy E Podpryatov, Sergii S Podpriatov, Jarosław Woliński, Hlib Repich, Nils Wierup, Liudmyla Lozinska
The studies presented were designed to highlight the impact of pancreatic enzymes on glycemic control and insulin response. Blood glucose and plasma insulin levels were monitored after intravenous, oral or direct gut glucose tolerance tests (GTT) in 6 pigs with an intact gastrointestinal tract and in 12 pigs following duodenal-jejunal bypass (DJB) surgery. In the intact pigs, pancreatic enzymes (Creon®) given orally 1 h prior to the GTT, lowered the blood glucose levels during the oral and meal GTT and reduced the plasma insulin response during the intravenous and meal GTT...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818776/bacillus-thuringiensis-coated-zinc-oxide-nanoparticle-and-its-biopesticidal-effects-on-the-pulse-beetle-callosobruchus-maculatus
#7
Balasubramanian Malaikozhundan, Baskaralingam Vaseeharan, Sekar Vijayakumar, Merlin P Thangaraj
Insect pests belonging to the genus Callosobruchus are the major cause of damage to stored pulse crops. Recently, nanotechnology has emerged as a promising tool for pest control. In the present study, we report for the first time the synthesis and biological evaluation of Bacillus thuringiensis coated zinc oxide nanoparticles (Bt-ZnO NPs) on the pulse beetle, Callosobruchus maculatus. The biologically synthesized Bt-ZnO NPs were extensively characterized using UV-Vis spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM) and Zeta potential...
August 9, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28814903/ixeris-dentata-extract-regulates-salivary-secretion-through-the-activation-of-aquaporin-5-and-prevents-diabetes-induced-xerostomia
#8
Kashi Raj Bhattarai, Sang-Won Lee, Seung Hyun Kim, Hyung-Ryong Kim, Han-Jung Chae
The aim of this study was to investigate the effects of Ixeris dentata (IXD) extract to improve the salivation rate in dry mouth induced by diabetes. Both control and diabetic rats were treated with a sublingual spray of either water or IXD extract to determine the effects of IXD on salivation. During the study, we observed that IXD extract treatment increased the salivary flow rate in diabetic rats. The expression of α-amylase was increased significantly in both saliva and glandular tissue lysates of IXD-treated diabetic rats...
2017: Journal of Experimental Pharmacology
https://www.readbyqxmd.com/read/28811748/salivary-diagnostic-markers-in-males-and-females-during-rest-and-exercise
#9
Kay Rutherfurd-Markwick, Carlene Starck, Deborah K Dulson, Ajmol Ali
BACKGROUND: Saliva is a useful diagnostic tool for analysis in sports, exercise and nutrition research, as collection is easy and non-invasive and it contains a large number of analytes affected by a range of physiological and pathological stressors and conditions. This study examined key salivary electrolytes and stress and immune markers in males and females at rest and during exercise. METHODS: Unstimulated whole saliva from 20 healthy, recreationally active participants (8 males and 12 females) was analysed for flow rate, osmolality, sodium (Na(+)), potassium (K(+)), chloride (Cl(-)), secretory immunoglobulin A (SIgA), α-amylase activity and cortisol during both rest and moderate intensity (70% peak power) cycling exercise in a randomised crossover design...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28811584/nanopriming-technology-for-enhancing-germination-and-starch-metabolism-of-aged-rice-seeds-using-phytosynthesized-silver-nanoparticles
#10
Wuttipong Mahakham, Ajit K Sarmah, Santi Maensiri, Piyada Theerakulpisut
Application of nanomaterials for agriculture is relatively new as compared to their use in biomedical and industrial sectors. In order to promote sustainable nanoagriculture, biocompatible silver nanoparticles (AgNPs) have been synthesized through green route using kaffir lime leaf extract for use as nanopriming agent for enhancing seed germination of rice aged seeds. Results of various characterization techniques showed the successful formation of AgNPs which were capped with phytochemicals present in the plant extract...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811162/engineering-peptidoglycan-degradation-related-genes-of-bacillus-subtilis-for-better-fermentation-processes
#11
Liang Zhao, Jianwen Ye, Jing Fu, Guo-Qiang Chen
In this study, Bacillus subtilis 168 Δupp was engineered to change the bacterial shapes. Namely, some peptidoglycan hydrolase related genes were inactivated individually or in different combinations, including sigD, lytE, lytF, lytC, lytD and lytG. Inactivations of these genes resulted in various intensities of blockages on cell division, leading to elongation of bacterial cells. The resulted fiber phenotypes showed different lengths ranging from tens of microns to several millimeters. Mutants with multiple gene inactivations such as ΔsigDΔlytEΔlytD showed more easily precipitated phenomenon, obviously increased growth rate, more sensitive to antibiotics and improved α-amylase production compared with that of B...
June 23, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28810635/curcumin-protects-against-acute-renal-injury-by-suppressing-jak2-stat3-pathway-in-severe-acute-pancreatitis-in-rats
#12
Shuaijun Zhu, Chi Zhang, Qinyong Weng, Bing Ye
The aim of the present study was to investigate the effect of curcumin on acute renal injury in a rat model of severe acute pancreatitis (SAP). A SAP model with acute kidney injury was established in rats by retrograde injection of 5% sodium taurocholate into the pancreatic duct. The serum amylase, creatinine (Cr) and blood urea nitrogen (BUN) levels in rats were measured. Hematoxylin and eosin staining was used to assess pancreatic and renal histological changes. Serum tumor necrosis factor (TNF)-α and interleukin (IL)-6 levels were measured using ELISA kits...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28809620/pancreatitis-in-a-high-hiv-prevalence-environment
#13
Frank Anderson, Sandie R Thomson
BACKGROUND: Acute pancreatitis is common in HIV-positive individuals in reports from regions with a low incidence of HIV infection. This association has not been reported in areas with a high incidence of HIV infection. OBJECTIVE: To examine the prevalence and outcomes of HIV-associated acute pancreatitis in a high HIV prevalence environment, and trends over the period May 2001 - November 2010. METHODS: The records of patients admitted with acute pancreatitis from 2001 to 2010 were reviewed, looking for HIV status, CD4 counts and medications at presentation...
July 28, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28809107/synthesis-and-insecticidal-activity-of-enzyme-triggered-functionalized-hollow-mesoporous-silica-for-controlled-release
#14
Amir Esmat Kaziem, Yunhao Gao, Shun He, Jianhong Li
In the present study, enzymatic responsive controlled release formulations (CRFs) were fabricated. The CRFs were achieved by anchoring mechanically interlocked molecules using α-cyclodextrin onto the surface pore rims of hollow mesoporous silica (HMS). The CRFs were characterized using Fourier transform infrared spectroscopy, scanning electron microscope, transmission electron microscope, and thermogravimetric analysis. The results showed that the CRFs had extraordinary loading ability for chlorantraniliprole (42% w/w) and could effectively preserve chlorantraniliprole against degradation under thermal conditions and UV radiation...
August 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28808401/in-vitro-%C3%AE-amylase-and-%C3%AE-glucosidase-inhibitory-and-cytotoxic-activities-of-extracts-from-cissus-cornifolia-planch-parts
#15
Talent Chipiti, Mohammed Auwal Ibrahim, Moganavelli Singh, Md Shahidul Islam
CONTEXT: Hyperglycemia is the hallmark of type 2 diabetes mellitus, and its prevention will go a long way in managing the disease and its associated complications. Reduction of postprandial hyperglycemia through retarding carbohydrates digesting enzymes is one of the major therapeutic approaches used in the management of diabetes. OBJECTIVE: The aim of the present study was to investigate the antidiabetic and cytotoxic effects of Cissus cornifolia extracts in vitro...
July 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28805888/development-of-small-intestinal-enzyme-activities-and-their-relationship-with-some-gut-regulatory-peptides-in-grazing-sheep
#16
C L Wang, X Lang, P J Wu, D P Casper, F D Li
Growth depends on an animal's capacity to digest and assimilate ingested nutrients, and insufficient supply and impairment will constrain lamb growth. Eight groups of Alpine Finewool lambs were harvested on 0, 3, 7, 14, 21, 28, 42, and 56 d to measure pH and enzymatic activities in the duodenum, proximal jejunum, middle jejunum, distal jejunum, and ileum mucosa or digesta. From the duodenum to the ileum the pH of intestinal mucosa and digesta increased, whereas pH changed very little with age. The trypsin, chymotrypsin, lipase, lactase, and α-amylase activities observed at birth decreased by d 3, followed by a nonuniform enzymatic response in the small intestine...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28805834/profiles-of-free-and-bound-phenolics-extracted-from-citrus-fruits-and-their-roles-in-biological-systems-content-and-antioxidant-anti-diabetic-and-anti-hypertensive-properties
#17
Muhammad H Alu'datt, Taha Rababah, Mohammad N Alhamad, Majdi A Al-Mahasneh, Khalil Ereifej, Ghazi Al-Karaki, Mohammed Al-Duais, Juan E Andrade, Carole C Tranchant, Stan Kubow, Kawther A Ghozlan
This study of selected plants of the Rutaceae family was carried out to investigate their phenolic content, antioxidant activity, and the in vitro inhibitory potential of extracted phenolics towards enzymes relevant for hyperglycemia and hypertension. The phenolic content, antioxidant activity and phenolic extract-mediated inhibitory activities for α-glucosidase and α-amylase were evaluated by spectrophotometry. The content of individual phenolics and the angiotensin I-converting enzyme (ACE) inhibitory activity of the phenolic extracts were evaluated by LC/MS-MS and RP-HPLC methods, respectively...
August 14, 2017: Food & Function
https://www.readbyqxmd.com/read/28804584/the-expression-of-activating-receptor-gene-of-natural-killer-cells-klrc3-in-patients-with-%C3%A2-type-1-diabetes-mellitus-t1dm
#18
Dalia Shalaby, Marwa Saied, Doaa Khater, Abla Abou Zeid
OBJECTIVES: To identify the possible role of natural killer (NK) cells in the pathogenesis of type 1 diabetes mellitus (T1DM) through studying the expression of the KLRC3 gene, which encodes the NK cell activating receptor (NKG2E). METHODS: This study was conducted at Alexandria University Children's Hospital from April to October 2015. The study was conducted with 30 newly diagnosed T1DM patients (15 males and 15 females), aged 7-13 years (10.6±1.8 years) and 20 non-diabetic subjects served as age- and sex-matched controls...
July 2017: Oman Medical Journal
https://www.readbyqxmd.com/read/28802982/reducing-of-salivary-%C3%AE-amylase-inhibition-by-using-bovine-serum-albumin-and-calcium-chloride-for-forensic-saliva-screening
#19
Jun Ohta, Masako Ohmura
Inhibiting salivary α-amylase is a critical issue of forensic saliva identification using the catalytic method. This study aims to identify human α-amylase inhibitors in forensic saliva screening by using a blue starch amylase test and to measure the extent of enzyme inhibition. Thus, in order to demonstrate the presence of inhibitors, we prepared positively charged metal ion sources or chelators that were mixed into the saliva stains. The results of this study show that ferric chloride (FeCl3), magnesium chloride, ethylenediaminetetraacetic acid, and citric acid significantly decrease the α-amylase activity of saliva stains...
July 25, 2017: Legal Medicine
https://www.readbyqxmd.com/read/28802846/effect-of-domestic-cooking-on-the-starch-digestibility-predicted-glycemic-indices-polyphenol-contents-and-alpha-amylase-inhibitory-properties-of-beans-phaseolis-vulgaris-and-breadfruit-treculia-africana
#20
E Chinedum, S Sanni, N Theressa, A Ebere
The effect of processing on starch digestibility, predicted glycemic indices (pGI), polyphenol contents and alpha amylase inhibitory properties of beans (Phaseolis vulgaris) and breadfruit (Treculia africana) was studied. Total starch ranged from 4.3 to 68.3g/100g, digestible starch ranged from 4.3 to 59.2 to 65.7g/100g for the raw and processed legumes; Resistance starch was not detected in most of the legumes except in fried breadfruit and the starches in both the raw and processed breadfruit were more rapidly digested than those from raw and cooked beans...
August 9, 2017: International Journal of Biological Macromolecules
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