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Amylase

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https://www.readbyqxmd.com/read/29458106/combi-metal-organic-framework-combi-mof-of-%C3%AE-amylase-and-glucoamylase-for-one-pot-starch-hydrolysis
#1
Manish Salgaonkar, Shamraja S Nadar, Virendra K Rathod
The multi-enzyme biocatalyst allows to run in vitro multi-step cascade reactions in a single pot. An efficient combi-metal organic frameworks (combi-MOF) of α-amylase and glucoamylase for one pot starch hydrolysis was constructed by mixing zinc acetate and 2‑methylimmidazole with enzyme mixture in one pot under biocompatible conditions. The prepared combi-MOF was characterized and analyzed by powder X-ray diffraction (PXRD), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM)...
February 16, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29455981/digestibility-of-fucosylated-glycosaminoglycan-from-sea-cucumber-and-its-effects-on-digestive-enzymes-under-simulated-salivary-and-gastrointestinal-conditions
#2
Longyan Zhao, Yujing Qin, Ruowei Guan, Wenqi Zheng, Jikai Liu, Jinhua Zhao
The digestibility of fucosylated glycosaminoglycan (FG) and its effects on digestive enzymes were investigated using an in vitro digestion model. Results showed that the molecular weight and the reducing sugar content of FG were not significantly changed, and no free monosaccharides released from FG were detected after the salivary, gastric and intestinal digestion, indicating that both the backbone and the sulfated fucose branches of FG are resistant to be cleaved in the saliva and gastrointestinal tract environments...
April 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29454827/development-of-thermostable-amylase-enzyme-from-bacillus-cereus-for-potential-antibiofilm-activity
#3
Ramalingam Vaikundamoorthy, Rajaram Rajendran, Ananth Selvaraju, Kaviyarasan Moorthy, Santhanam Perumal
The marine bacterial strain Bacillus cereus was used to produce amylase enzyme and has excellent alkali-stable and thermostable enzymatic activity. The combined effects of pH, temperature and incubation time on amylase activity were studied using response surface methodology. The amylase enzyme activity was also determined in the presence of various metal ions, chelating agents, detergents and the results showed that the maximum enzyme activity was observed in the presence of calcium chloride (96.1%), EDTA (63...
February 12, 2018: Bioorganic Chemistry
https://www.readbyqxmd.com/read/29449858/exogenous-hydrogen-peroxide-contributes-to-heme-oxygenase-1-delaying-programmed-cell-death-in-isolated-aleurone-layers-of-rice-subjected-to-drought-stress-in-a-cgmp-dependent-manner
#4
Guanghui Wang, Yu Xiao, Xiaojiang Deng, Heting Zhang, Tingge Li, Huiping Chen
Hydrogen peroxide (H 2 O 2 ) is a reactive oxygen species (ROS) that plays a dual role in plant cells. Here, we discovered that drought (20% polyethylene glycol-6000, PEG)-triggered decreases of HO-1 transcript expression and HO activity. However, exogenous H 2 O 2 contributed toward the increase in HO-1 gene expression and activity of the enzyme under drought stress. Meanwhile, the HO-1 inducer hematin could mimic the effects of the H 2 O 2 scavengers ascorbic acid (AsA) and dimethylthiourea (DMTU) and the H 2 O 2 synthesis inhibitor diphenyleneiodonium (DPI) for scavenging or diminishing drought-induced endogenous H 2 O 2 ...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29444820/a-modified-hypoallergenic-variant-of-the-ricinus-communis-ric-c1-protein-retains-biological-activity
#5
Thaís Pacheco-Soares, André de Oliveira Carvalho, Jucélia da Silva Araújo, Giliane da Silva de Souza, Olga L T Machado
Ric c1, an allergenic protein from Ricinus communis , is an insect α-amylase inhibitor that has become an occupational allergen. Ric c1 can cross-react with allergens from wheat, soybean, peanut, shrimp, fish, gluten, house dust, tobacco, and air fungus, thereby amplifying the concern and risks caused by Ricinus allergens. Two continuous IgE-binding epitopes were identified in Ric c1, both containing glutamic acid residues involved in IgE-binding and allergic challenges. We produced recombinant Ric c1 (rRic c1) in Escherichia coli , using primers from foliar R...
February 14, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29444502/starch-combined-with-sucrose-provokes-greater-root-dentine-demineralization-than-sucrose-alone
#6
Samilly Evangelista Souza, Aline Araújo Sampaio, Altair Antoninha Del Bel Cury, Yuri Wanderley Cavalcanti, Antônio Pedro Ricomini Filho, Jaime Aparecido Cury
Since there is no consensus about whether starch increases the cariogenic potential of sucrose, we used a validated 3-species biofilm model to evaluate if starch combined with sucrose provokes higher root dentine demineralization than sucrose alone. Biofilms (n = 18) composed by Streptococcus mutans (the most cariogenic bacteria), Actinomces naeslundii (which has amylolytic activity), and Streptococcus gordonii (which binds salivary amylase) were formed on root dentine slabs under exposure 8 ×/day to one of the following treatments: 0...
February 14, 2018: Caries Research
https://www.readbyqxmd.com/read/29442238/two-point-measurement-of-amylase-in-drainage-fluid-predicts-severe-postoperative-pancreatic-fistula-after-gastric-cancer-surgery
#7
Satoshi Kamiya, Naoki Hiki, Koshi Kumagai, Michitaka Honda, Souya Nunobe, Manabu Ohashi, Takeshi Sano, Toshiharu Yamaguchi
BACKGROUND: Early identification of patients at risk of postoperative pancreatic fistula (POPF) allows appropriate management after gastrectomy. Although some reports have suggested a correlation between POPF and the concentration of amylase in drained abdominal fluid (D-AMY), this has not been proven to impact sufficiently on clinical decision-making. A sustained high level of D-AMY is often assumed to be due to unsatisfactory drainage or excessive pancreatic leakage. We assessed the clinical utility of measuring D-AMY on postoperative day (POD) 1 and POD3 for prediction of POPF...
February 13, 2018: Gastric Cancer
https://www.readbyqxmd.com/read/29442225/feeder-cell-independent-culture-of-the-pig-embryonic-stem-cell-derived-exocrine-pancreatic-cell-line-picm-31
#8
Neil C Talbot, Amy E Shannon, Caitlin E Phillips, Wesley M Garrett
The adaptation to feeder-independent growth of a pig embryonic stem cell-derived pancreatic cell line is described. The parental PICM-31 cell line, previously characterized as an exocrine pancreas cell line, was colony-cloned two times in succession resulting in the derivative cell line, PICM-31A1. PICM-31A1 cells were adapted to growth on a polymerized collagen matrix using feeder cell-conditioned medium and were designated PICM-31FF. Like the parental cells, the PICM-31FF cells were small and grew relatively slowly in closely knit colonies that eventually coalesced into a continuous monolayer...
February 13, 2018: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/29440961/acute-pancreatitis-during-glp-1-receptor-agonist-treatment-a-case-report
#9
Bogdan Augustin Chis, Daniela Fodor
Glucagon-like peptide 1 receptor agonists (GLP-1RA) are the newest treatment for diabetes mellitus (DM). These drugs can down-regulate fasting glucose more than oral drugs and lead to more constant glucose levels compared to regular insulin. Acute pancreatitis is a serious condition that may have a fatal outcome. It has been shown that long term and high doses of GLP-1RA can cause pancreatic changes in animals, but no connection has been proven in humans. We present the case of a 67 years old man with DM treated with oral drugs for 10 years until 3 months before, when GLP-1RA was added...
2018: Clujul Medical (1957)
https://www.readbyqxmd.com/read/29439880/suppression-of-inducible-nitric-oxide-synthase-and-tumor-necrosis-factor-alpha-level-by-lycopene-is-comparable-to-methylprednisolone-in-acute-pancreatitis
#10
Nahla E El-Ashmawy, Naglaa F Khedr, Hoda A El-Bahrawy, Omnia B Hamada
BACKGROUND: Oxidative stress and inflammation may play a key role in the pathogenesis of acute pancreatitis (AP). Lycopene, a natural carotenoid, has antioxidant scavenger capacity and inhibits inflammation in many experimental models. AIM: The study was designed to investigate whether lycopene can ameliorate l-arginine-induced pancreatitis in rats and to elucidate the underlying molecular mechanisms of these effects. METHODS: Forty-eight adult male Wistar rats were divided into: control group (vehicle, orally, 10 days), AP group (3 g/kg l-arginine, single i...
February 2, 2018: Digestive and Liver Disease
https://www.readbyqxmd.com/read/29435751/impact-of-anatomical-position-of-the-pancreas-on-postoperative-complications-and-drain-amylase-concentrations-after-laparoscopic-distal-gastrectomy-for-gastric-cancer
#11
Koshi Kumagai, Naoki Hiki, Souya Nunobe, Satoshi Kamiya, Masahiro Tsujiura, Satoshi Ida, Manabu Ohashi, Toshiharu Yamaguchi, Takeshi Sano
BACKGROUND: Laparoscopic surgery for gastric cancer requires traction or compression of the pancreas, with the extent depending on the anatomical position of the pancreas. This study investigated the impact of the position of the pancreas on postoperative complications and drain amylase concentrations after laparoscopic distal gastrectomy (LDG). METHODS: Gastric cancer patients who underwent LDG were assessed retrospectively. The following anatomical parameters were measured retrospectively in preoperative computed tomography sagittal projections: the length of the vertical line between the pancreas and the aorta (P-A length), representing the height of the slope looking down the celiac artery from the top of the pancreas, and the angle between a line drawn from the upper border of the pancreas to the root of the celiac artery and the aorta (UP-CA angle), representing the steepness of the slope...
February 12, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29435045/the-protective-effects-of-rutaecarpine-on-acute-pancreatitis
#12
Lu Yan, Qing-Fu Li, Yan-Ting Rong, Yong-Heng Chen, Zhao-Hong Huang, Zhi-Zhi Wang, Jie Peng
Acute pancreatitis (AP) is the acute inflammation of the pancreas. The morbidity of AP has increased in recent years. Certain patients eventually develop severe AP (SAP), which rapidly progresses to multiple organ dysfunction; the incidence of this occurring in patients with AP is 20-30%. To date, no specific drugs or methods exist to treat this disease. Rutaecarpine relaxes vascular smooth muscle by stimulating calcitonin gene-related peptide (CGRP) release via activation of vanilloid receptor subtype 1 (VR1)...
March 2018: Oncology Letters
https://www.readbyqxmd.com/read/29434684/intraglandular-transplantation-of-adipose-derived-stem-cells-combined-with-platelet-rich-fibrin-extract-for-the-treatment-of-irradiation-induced-salivary-gland-damage
#13
Zhifa Wang, Hongyan Xing, Hanqing Hu, Taiqiang Dai, Yan Wang, Zhijin Li, Ran An, Haiyan Xu, Yanpu Liu, Bin Liu
The aim of the present study was to determine the effect of adipose-derived mesenchymal stem cells (ADSCs) combined with heterologous platelet-rich fibrin extract (PRFe) on irradiation-induced salivary gland (SG) damage. ADSCs were isolated from C3H mice, whereas PRFe was obtained from New Zealand rabbits. Twelve weeks post irradiation, the ADSCs or PRFe or their combination were transplanted into the submandibular glands of C3H mice with irradiation-induced damage. The salivary flow rate (SFR) was determined and histopathological analysis was performed at 12 weeks post transplantation...
January 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29433292/inhibitory-activity-of-phenolic-rich-pistachio-green-hull-extract-enriched-pasta-on-key-type-2-diabetes-relevant-enzymes-and-glycemic-index
#14
Sajjad Lalegani, Hassan Ahmadi Gavlighi, Mohammad Hossein Azizi, Roghayeh Amini Sarteshnizi
Phenolic compounds as agro-industrial by-products have been associated with health benefits since they exhibit high antioxidant activity and anti-diabetic properties. In this study, polyphenol-rich extract from pistachio green hull (PGH) was evaluated for antioxidant activity and its ability to inhibit α-amylase and α-glucosidase activity in vitro. The effect of PGH extract powder on in vitro starch digestibility was also evaluated. The results showed that PGH had stronger antioxidant activity than Trolox...
March 2018: Food Research International
https://www.readbyqxmd.com/read/29433244/identification-of-enzyme-origin-in-dough-improvers-dna-based-and-proteomic-approaches
#15
Gianluca Picariello, Luigia Di Stasio, Gianfranco Mamone, Giuseppe Iacomino, Antonella Venezia, Nunzia Iannaccone, Pasquale Ferranti, Raffaele Coppola, Francesco Addeo
Enzymatic dough improvers (DIs) are increasingly used as baking co-adjuvants. Herein, an array of techniques, including Western blotting, PCR, electrophoresis-based and shotgun proteomics, was addressed to identify the enzymes in six commercial DI preparations. In particular, this work sought to exclude the possible undeclared use of amylolytic enzymes from porcine (or other animal origin) pancreas in DIs. PCR-amplified mitochondrial cytochrome b (mt cyt b) gene region and porcine pancreatic α-amylase were the targets of DNA-based and protein methods, respectively, both assuring a limit of detection lower than 0...
March 2018: Food Research International
https://www.readbyqxmd.com/read/29433189/changes-in-polyphenol-composition-and-bioactivity-of-the-native-chilean-white-strawberry-fragaria-chiloensis-spp-chiloensis-f-chiloensis-after-in-vitro-gastrointestinal-digestion
#16
Samanta Thomas-Valdés, Cristina Theoduloz, Felipe Jiménez-Aspee, Alberto Burgos-Edwards, Guillermo Schmeda-Hirschmann
The Chilean white strawberry (Fragaria chiloensis spp. chiloensis f. chiloensis) is a semi-domesticated strawberry with high polyphenol content and antioxidant activity occurring in southern Chile. The aim of this work was to compare the composition and bioactivity of the polyphenol-enriched fruit extract (PEE) before and after simulated gastrointestinal digestion (GID). Results show a decrease by >50% in the total phenolic (TP) content at the end of the GID, compared to the non-digested PEE. A reduction in the antioxidant capacity of the PEEs was observed after GID by means of DPPH, FRAP, TEAC and anion superoxide assays...
March 2018: Food Research International
https://www.readbyqxmd.com/read/29430965/extraction-optimization-total-phenolic-flavonoid-contents-hplc-dad-analysis-and-diverse-pharmacological-evaluations-of-dysphania-ambrosioides-l-mosyakin-clemants
#17
Tanzeel Zohra, Muhammad Ovais, Ali Talha Khalil, Muhammad Qasim, Muhammad Ayaz, Zabta Khan Shinwari
The present study aims to evaluate phytochemical and pharmacological potentials of Dysphania ambrosioides (L.) Mosyakin & Clemants previously known as Chenopodium ambrosioides L. Extraction was carried out using 14 solvents with wide range of polarity to find out the best solvent system for each bioactivity. Total phenolic and flavonoids contents were measured colorimetrically and polyphenolics were quantified via HPLC-DAD analysis. The samples were screened for inhibitory potentials against free radicals, leishmania, cancer cell lines, protein kinase, α-Amylase enzymes and microbial strains...
February 12, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29430375/complete-genome-sequence-of-bacillus-velezensis-157-isolated-from-eucommia-ulmoides-with-pathogenic-bacteria-inhibiting-and-lignocellulolytic-enzymes-production-by-ssf
#18
Long Chen, Wei Gu, Hai-Yan Xu, Gui-Lian Yang, Xiao-Feng Shan, Guang Chen, Chun-Feng Wang, Ai-Dong Qian
Bacillus velezensis 157 was isolated from the bark of Eucommia ulmoides , and exhibited antagonistic activity against a broad spectrum of pathogenic bacteria and fungi. Moreover, B. velezensis 157 also showed various lignocellulolytic activities including cellulase, xylanase, α-amylase, and pectinase, which had the ability of using the agro-industrial waste (soybean meal, wheat bran, sugarcane bagasse, wheat straw, rice husk, maize flour and maize straw) under solid-state fermentation and obtained several industrially valuable enzymes...
February 2018: 3 Biotech
https://www.readbyqxmd.com/read/29430365/bioactive-compounds-from-mangrove-derived-rare-actinobacterium-saccharomonospora-oceani-vjds-3
#19
Manideepa Indupalli, Vijayalakshmi Muvva, Ushakiranmayi Mangamuri, Rajesh Kumar Munaganti, Krishna Naragani
A rare actinobacterium was isolated from Nizampatnam mangrove ecosystem of Andhra Pradesh, India, and was screened for its ability to produce bioactive compounds. The potential strain was identified as Saccharomonospora oceani VJDS-3 by polyphasic taxonomy. Purification of the biologically active compounds by column chromatography led to the isolation of three compounds, namely methoxy ethyl cinnamate (ethyl(E)-3-(4-methoxyphenyl)acrylate) (R1), 4-hydroxy methyl cinnamate (methyl(E)-3-(4-hydroxyphenyl)acrylate) (R2) and 4-methylbenzoic acid (R3)...
February 2018: 3 Biotech
https://www.readbyqxmd.com/read/29430363/optimization-of-gluco-amylase-production-from-aspergillus-spp-for-its-use-in-saccharification-of-liquefied-corn-starch
#20
Deepali Jain, Priya Katyal
Fungal gluco-amylase is required for the production of sugars from starchy substrates. Commercially available fungal gluco-amylase is quite costly which makes the process uneconomical. This study was undertaken to standardize physico-chemical parameters for optimum production of gluco-amylases from Aspergillus spp. Two fungal cultures, i.e., Aspergillus niger and Aspergillus terreus, were compared for gluco-amylase activity both under stationary and shake flask conditions. Among two fungal cultures, maximum gluco-amylase activity was shown by A...
February 2018: 3 Biotech
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