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Polyethylene Glycol 3350

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https://www.readbyqxmd.com/read/28291751/the-hyperthermophilic-cystathionine-%C3%AE-synthase-from-the-aerobic-crenarchaeon-sulfolobus-tokodaii-expression-purification-crystallization-and-structural-insights
#1
Dan Sato, Tomoo Shiba, Sae Mizuno, Ayaka Kawamura, Shoko Hanada, Tetsuya Yamada, Mai Shinozaki, Masahiko Yanagitani, Takashi Tamura, Kenji Inagaki, Shigeharu Harada
Cystathionine γ-synthase (CGS; EC 2.5.1.48), a pyridoxal 5'-phosphate (PLP)-dependent enzyme, catalyzes the formation of cystathionine from an L-homoserine derivative and L-cysteine in the first step of the transsulfuration pathway. Recombinant CGS from the thermoacidophilic archaeon Sulfolobus tokodaii (StCGS) was overexpressed in Escherichia coli and purified to homogeneity by heat treatment followed by hydroxyapatite and gel-filtration column chromatography. The purified enzyme shows higher enzymatic activity at 353 K under basic pH conditions compared with that at 293 K...
March 1, 2017: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/28242427/purification-and-characterization-of-a-collagenase-from-penicillium-sp-ucp-1286-by-polyethylene-glycol-phosphate-aqueous-two-phase-system
#2
Maria Carolina de Albuquerque Wanderley, José Manoel Wanderley Duarte Neto, Wendell Wagner Campos Albuquerque, Daniela de Araújo Viana Marques, Carolina de Albuquerque Lima, Sara Isabel da Cruz Silvério, José Luiz de Lima Filho, José António Couto Teixeira, Ana Lúcia Figueiredo Porto
Collagenases are proteolytic enzymes capable of degrading both native and denatured collagen, reported to be applied in industrial, medical and biotechnological sectors. Liquid-liquid extraction using aqueous two-phase system (ATPS) is one of the most promising bioseparation techniques, which can substitute difficult solid-liquid separation processes, offering many advantages over conventional methods including low-processing time, low-cost material and low-energy consumption. The collagenase produced by Penicillium sp...
February 24, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28147222/seventy-years-of-polyethylene-glycols-in-gastroenterology-the-journey-of-peg-4000-and-3350-from-nonabsorbable-marker-to-colonoscopy-preparation-to-osmotic-laxative
#3
EDITORIAL
John S Fordtran, Alan F Hofmann
No abstract text is available yet for this article.
January 29, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28110184/structural-analysis-of-binding-functionality-of-folic-acid-peg-dendrimers-against-folate-receptor
#4
Diana Sampogna-Mireles, Ingrid D Araya-Durán, Valeria Márquez-Miranda, Jesús A Valencia-Gallegos, Fernando D González-Nilo
Dendrimers functionalized with folic acid (FA) are drug delivery systems that can selectively target cancer cells with folate receptors (FR-α) overexpression. Incorporation of polyethylene glycol (PEG) can enhance dendrimers solubility and pharmacokinetics, but ligand-receptor binding must not be affected. In this work we characterized, at atomic level, the binding functionality of conventional site-specific dendrimers conjugated with FA with PEG 750 or PEG 3350 as a linker. After Molecular Dynamics simulation, we observed that both PEG's did not interfere over ligand-receptor binding functionality...
January 6, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/27935351/childhood-constipation-recognition-management-and-the-role-of-the-nurse
#5
James Schuster Bruce, Catherine Schuster Bruce, Hayley Short, Siba Prosad Paul
Constipation is a common childhood condition that health professionals will encounter in many different settings. The majority of these cases of childhood constipation are idiopathic in nature. It is considered to exhibit the 'tip of the iceberg' phenomenon as a large number of cases remain undetected due to under-recognition by families, embarrassment regarding the condition, fear of receiving a negative response from health professionals, or parental belief there is actually something more seriously wrong and failure to accept the diagnosis...
December 8, 2016: British Journal of Nursing: BJN
https://www.readbyqxmd.com/read/27668072/predictors-of-suboptimal-bowel-preparation-in-asymptomatic-patients-undergoing-average-risk-screening-colonoscopy
#6
Shail M Govani, Eric E Elliott, Stacy B Menees, Stephanie L Judd, Sameer D Saini, Constantinos P Anastassiades, Annette L Urganus, Suzanna J Boyce, Philip S Schoenfeld
AIM: To identify risk factors for a suboptimal preparation among a population undergoing screening or surveillance colonoscopy. METHODS: Retrospective review of the University of Michigan and Veteran's Administration (VA) Hospital records from 2009 to identify patients age 50 and older who underwent screening or surveillance procedure and had resection of polyps less than 1 cm in size and no more than 2 polyps. Patients with inflammatory bowel disease or a family history of colorectal cancer were excluded...
September 16, 2016: World Journal of Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/27616074/quality-by-design-qbd-approach-for-design-and-development-of-drug-device-combination-products-a-case-study-on-flunisolide-nasal-spray
#7
Swapnil Sharadkumar Chudiwal, Mohamed Hassan G Dehghan
The objective of the present study was to design and develop drug-device combination product in particular flunisolide nasal spray using quality by design (QbD) approach. Quality target product profile (QTPP) of flunisolide nasal spray was defined and critical quality attributes (CQAs) i.e. viscosity (cp) (Y1) and D50 DSD (µm) (Y2) were identified. Potential risk factors were identified using a fish bone diagram and failure mode effect analysis (FMEA) tools. Plackett Burman and Box Behnken design were used for screening the significant factors and optimizing the variables range respectively...
September 10, 2016: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/27601897/influence-of-freeze-drying-and-%C3%AE-irradiation-in-preclinical-studies-of-flurbiprofen-polymeric-nanoparticles-for-ocular-delivery-using-d-trehalose-and-polyethylene-glycol
#8
Gladys Rosario Ramos Yacasi, María Luisa García López, Marta Espina García, Alexander Parra Coca, Ana Cristina Calpena Campmany
This study investigated the suspension of poly(ε-caprolactone) nanoparticles as an ocular delivery system for flurbiprofen (FB-PεCL-NPs) in order to overcome the associated problems, such as stability, sterility, tolerance, and efficacy, with two different FB-PεCL-NP formulations. The formulations were stabilized with poloxamer 188 (1.66% and 3.5%) and submitted individually for freeze-drying and γ-irradiation with polyethylene glycol 3350 (PEG3350) and d-(+)-trehalose (TRE). Both formulations satisfied criteria according to all physicochemical parameters required for ocular pharmaceuticals...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27569713/peg-and-thickeners-a-critical-interaction-between-polyethylene-glycol-laxative-and-starch-based-thickeners
#9
Brian J Carlisle, Garrett Craft, Julie P Harmon, Alina Ilkevitch, Jenik Nicoghosian, Inna Sheyner, Jonathan T Stewart
Clinicians commonly encounter dysphagia and constipation in a skilled nursing population. Increasing the viscosity of liquids, usually with a starch- or xanthan gum-based thickener, serves as a key intervention for patients with dysphagia. We report a newly identified and potentially dangerous interaction between polyethylene glycol 3350 laxative (PEG) and starch-thickened liquids. A patient requiring nectar-thickened liquids became constipated, and medical staff prescribed PEG for constipation. His nurse observed that the thickened apple juice immediately thinned to near-water consistency when PEG was added...
September 1, 2016: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/27550498/anaphylaxis-to-polyethylene-glycol-colyte%C3%A2-in-a-patient-with-diverticulitis
#10
So Hee Lee, Sun Hyuk Hwang, Jin Soo Park, Hae Sim Park, Yoo Seob Shin
Polyethylene glycols (PEGs) are believed to be chemically inert agents, but larger PEG polymers could have immunogenicity. A 39-year-old man was referred to emergency room for loss of consciousness and dyspnea after taking of PEG-3350 (Colyte®). In laboratory findings, the initial serum tryptase level was increased to 91.9 mg/L (normal range: 0.00-11.40 mg/L) without any other laboratory abnormalities. The intradermal test with 10 mg/mL Colyte® showed a 5 × 5 mm wheal, but basophil activation and histamine releasability tests were negative...
October 2016: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/27500338/polyethylene-glycol-3350-and-docusate-sodium-compared-with-docusate-sodium-alone-after-urogynecologic-surgery-a-randomized-controlled-trial
#11
Autumn L Edenfield, Nazema Y Siddiqui, Jennifer M Wu, Alexis A Dieter, Melissa A Garrett, Anthony G Visco
OBJECTIVE: To compare time to first bowel movement and additional gastrointestinal outcomes between women receiving polyethylene glycol 3350 (PEG3350) and docusate sodium and docusate sodium alone after urogynecologic surgery. METHODS: Participants received twice-daily 100 mg docusate sodium and were randomized to daily 1) PEG3350 or 2) inert placebo for 5 days after urogynecologic surgery. They completed bowel diaries, Bristol stool scale, validated Patient Assessment of Constipation Symptom Questionnaire, and Patient Assessment of Constipation Quality-of-Life Questionnaire preoperatively and 1 week after surgery...
September 2016: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/27487924/crystallization-and-x-ray-diffraction-analysis-of-an-l-arabinonate-dehydratase-from-rhizobium-leguminosarum-bv-trifolii-and-a-d-xylonate-dehydratase-from-caulobacter-crescentus
#12
Mohammad Mubinur Rahman, Martina Andberg, Anu Koivula, Juha Rouvinen, Nina Hakulinen
L-Arabinonate dehydratase (EC 4.2.1.25) and D-xylonate dehydratase (EC 4.2.1.82) are two enzymes that are involved in a nonphosphorylative oxidation pathway of pentose sugars. L-Arabinonate dehydratase converts L-arabinonate into 2-dehydro-3-deoxy-L-arabinonate, and D-xylonate dehydratase catalyzes the dehydration of D-xylonate to 2-dehydro-3-deoxy-D-xylonate. L-Arabinonate and D-xylonate dehydratases belong to the IlvD/EDD family, together with 6-phosphogluconate dehydratases and dihydroxyacid dehydratases...
August 2016: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/27486340/safety-of-polyethylene-glycol-3350-solution-in-chronic-constipation-randomized-placebo-controlled-trial
#13
Thomas McGraw
PURPOSE: To evaluate the safety and tolerability of aqueous solution concentrate (ASC) of polyethylene glycol (PEG) 3350 in patients with functional constipation. PATIENTS AND METHODS: The patients who met Rome III diagnostic criteria for functional constipation were randomized in this multicenter, randomized, placebo-controlled, single-blind study to receive once daily dose of PEG 3350 (17 g) ASC or placebo solution for 14 days. The study comprised a screening period (visit 1), endoscopy procedure (visits 2 and 3), and followup telephone calls 30 days post-treatment...
2016: Clinical and Experimental Gastroenterology
https://www.readbyqxmd.com/read/27295188/the-influence-of-polyethylene-glycol-solution-on-the-dissolution-rate-of-sustained-release-morphine
#14
Michael Hodgman, Michael G Holland, Ulrich Englich, Susan M Wojcik, William D Grant, Erich Leitner
INTRODUCTION: Whole bowel irrigation (WBI) is a management option for overdose of medications poorly adsorbed to activated charcoal, with modified release properties, or for body packers. Polyethylene glycol (PEG) is a mixture of ethylene oxide polymers of varying molecular weight. PEG with an average molecular weight of 3350 g/mol is used for WBI. PEG electrolyte lavage solution has been shown in vitro to hasten the dissolution of acetaminophen. The impact of PEG on the pharmacokinetics of extended release pharmaceuticals is unknown...
December 2016: Journal of Medical Toxicology: Official Journal of the American College of Medical Toxicology
https://www.readbyqxmd.com/read/27270968/prucalopride-induces-high-amplitude-propagating-contractions-in-the-colon-of-patients-with-chronic-constipation-a-randomized-study
#15
P B Miner, M Camilleri, D Burton, H Achenbach, H Wan, J Dragone, B Mellgard
BACKGROUND: This study compared prucalopride, a selective, prokinetic, 5-HT4 receptor agonist, with polyethylene glycol 3350 + electrolytes (PEG3350), an osmotic laxative, on colonic motility parameters, primarily high-amplitude propagating contractions (HAPCs) in patients with chronic constipation. METHODS: This randomized, cross-over, reader-blinded study was conducted at a single site in the USA. The study was open to men and women aged 18-75 years who met study inclusion criteria...
September 2016: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/27158544/polyethylene-glycol-3350-in-occasional-constipation-a-one-week-randomized-placebo-controlled-double-blind-trial
#16
Thomas McGraw
AIM: To evaluate the efficacy and safety of polyethylene glycol (PEG) 3350 in subjects with self-reported occasional constipation. METHODS: Eligible subjects ≥ 17 years of age were randomized to receive either placebo or PEG 3350 17 g once daily in this multicenter, double-blind trial. Evaluations were conducted before (baseline) and after a 7-d treatment period. The primary efficacy variable was the proportion of subjects reporting complete resolution of straining and hard or lumpy stools...
May 6, 2016: World Journal of Gastrointestinal Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/27139830/the-periplasmic-sensing-domain-of-vibrio-fischeri-chemoreceptor-protein-a-vfca-cloning-purification-and-crystallographic-analysis
#17
Abu Iftiaf Md Salah Ud-Din, Anna Roujeinikova
Flagella-mediated motility and chemotaxis towards nutrients are important characteristics of Vibrio fischeri that play a crucial role in the development of its symbiotic relationship with its Hawaiian squid host Euprymna scolopes. The V. fischeri chemoreceptor A (VfcA) mediates chemotaxis toward amino acids. The periplasmic sensory domain of VfcA has been crystallized by the hanging-drop vapour-diffusion method using polyethylene glycol 3350 as a precipitating agent. The crystals belonged to space group P1, with unit-cell parameters a = 39...
May 2016: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/27109994/optimal-solution-volume-for-luminal-preservation-a-preclinical-study-in-porcine-intestinal-preservation
#18
M Oltean, M Papurica, L Jiga, B Hoinoiu, C Glameanu, A Bresler, G Patrut, R Grigorie, M Ionac, M Hellström
BACKGROUND: Rodent studies suggest that luminal solutions alleviate the mucosal injury and prolong intestinal preservation but concerns exist that excessive volumes of luminal fluid may promote tissue edema. Differences in size, structure, and metabolism between rats and humans require studies in large animals before clinical use. METHODS: Intestinal procurement was performed in 7 pigs. After perfusion with histidine-tryptophan-ketoglutarate (HTK), 40-cm-long segments were cut and filled with 13...
March 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27041744/drop-printing-of-pharmaceuticals-effect-of-molecular-weight-on-peg-coated-naproxen-peg3350-solid-dispersions
#19
Hsin-Yun Hsu, Scott Toth, Garth J Simpson, Michael T Harris
Solid dispersions have been used to enhance the bioavailability of poorly water-soluble active pharmaceutical ingredients (APIs). However, the solid state phase, compositional uniformity, and scale-up problems are issues that need to be addressed. To allow for highly controllable products, the Drop Printing (DP) technique can provide precise dosages and predictable compositional uniformity of APIs in two/three dimensional structures. In this study, DP was used to prepare naproxen (NAP)/polyethylene glycol 3350 (PEG3350) solid dispersions with PEG coatings of different molecular weights (MW)...
December 2015: AIChE Journal
https://www.readbyqxmd.com/read/26989345/additive-effect-on-soybean-peroxidase-catalyzed-removal-of-anilines-from-water
#20
Samar Mazloum, Mohammed Mousa Al-Ansari, Keith Taylor, Jatinder K Bewtra, Niharendu Biswas
Soybean peroxidase has been shown to be effective in removal of aromatic compounds from wastewater, while the use of additives effectively reduces enzyme concentration requirement, hence overall treatment cost. Enzymatic treatment, an oxidative polymerization, was successful in removal of over 95% of both aniline and o-anisidine. The originality of this study lies in the findings that the additives, sodium dodecyl sulfate (SDS), sodium dodecylbenzenesulfonate (SDBS), Triton X-100, and sodium dodecanoate (SDOD), reduced enzyme concentration requirement, while polyethylene glycol (PEG, average molar mass of 3350 g/mol) had no effect on the required enzyme concentration...
February 1, 2016: Environmental Engineering Science
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