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https://www.readbyqxmd.com/read/28812182/rheological-characterization-of-molten-polymer-drug-dispersions-as-a-predictive-tool-for-pharmaceutical-hot-melt-extrusion-processability
#1
Jeroen Van Renterghem, Chris Vervaet, Thomas De Beer
PURPOSE: The aim of this study was to investigate (i) the influence of drug solid-state (crystalline or dissolved in the polymer matrix) on the melt viscosity and (ii) the influence of the drug concentration, temperature and shear rate on polymer crystallization using rheological tests. METHODS: Poly (ethylene oxide) (PEO) (100.000 g/mol) and physical mixtures (PM) containing 10-20-30-40% (w/w) ketoprofen or 10% (w/w) theophylline in PEO were rheologically characterized...
August 15, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28811107/local-efficacy-of-periarticular-morphine-injection-in-simultaneous-bilateral-total-knee-arthroplasty-a-prospective-randomized-double-blind-trial
#2
Kentaro Iwakiri, Yoichi Ohta, Akio Kobayashi, Yukihide Minoda, Hiroaki Nakamura
BACKGROUND: The periarticular multimodal cocktail injection including morphine is currently commonly used to reduce postoperative pain following total knee arthroplasty (TKA). Despite its analgesic effect, it frequently causes nausea, which is an adverse effect of opioids. It is inconclusive whether the intraoperative injection of periarticular morphine is effective peripherally. The aim of this study was to assess whether the addition of morphine to unilateral periarticular knee injections improves postoperative pain, range of motion, and swelling in patients undergoing simultaneous bilateral TKA...
July 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28808332/magnetic-microsphere-based-portable-solid-phase-extraction-device-for-on-site-pre-concentration-of-organics-from-large-volume-water-samples
#3
Zhijian Yao, Qingqing Zhao, Yan Ma, Wei Wang, Qing Zhou, Aimin Li
In this research a new magnetic material called M88 was fully synthetized and characterized for the extraction of pharmaceutical and personal care products in water samples. In addition, a portable prototype of magnetic solidphase extraction (MSPE) device was developed for the onsite preconcentration. The MSPE coupling with high performance liquid chromatography-Diode array detector (HPLC-DAD) method was developed and validated for simultaneous analysis of 11 PPCPs (mefenamic acid, chloroamphenicol, ketoprofen, clofibric acid, indometacin, acetylsalicylic acid, bisphenol A, phenylphenol, gemfibrozil, triclosan, and ibuprofen) in environmental water samples...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28802525/layered-double-hydroxides-based-ion-exchange-extraction-for-high-sensitive-analysis-of-non-steroidal-anti-inflammatory-drugs
#4
Wei Zhou, Chenlu Wang, Yikun Liu, Wenpeng Zhang, Zilin Chen
Layered double hydroxides (LDHs) are ideal sorbents for solid phase extraction (SPE) because of the excellent ion exchange capacity and high specific surface area. However, difficult elution of the analytes from the LDHs is a problem due to the strong ionic interaction between anions and LDHs. High concentrated NaOH solution is employed to elute the sample, but it not suitable for analyzing by HPLC. To solve this problem, a simple acid-base neutralization method was proposed after elution, and then the neutral samples were directly injected to HPLC for analysis...
July 15, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28802202/a-thermosensitive-drug-delivery-system-prepared-by-blend-electrospinning
#5
Heyu Li, Kailin Liu, Qingqing Sang, Gareth R Williams, Junzi Wu, Haijun Wang, Jianrong Wu, Li-Min Zhu
In this study, the thermosensitive polymer poly(di(ethylene glycol) methyl ether methacrylate) (PDEGMA) was synthesized and electrospun into fibers by blending with ethyl cellulose (EC). Fibers were additionally prepared loaded with ketoprofen (KET) as a model drug. Smooth cylindrical fibers could generally be observed by electron microscopy, although there were some beads and fused fibers visible in the KET-loaded materials. KET was found to be amorphously distributed in the fibers on the basis of X-ray diffraction data...
July 25, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28796322/ecotoxicological-properties-of-ketoprofen-and-the-s-enantiomer-dexketoprofen-bioassays-in-freshwater-model-species-and-biomarkers-in-fish-plhc-1-cell-line
#6
Elvira Mennillo, Augustine Arukwe, Gianfranca Monni, Valentina Meucci, Luigi Intorre, Carlo Pretti
The increased use of non-steroidal anti-inflammatory drugs (NSAIDs) has resulted in their ubiquitous presence in the environment. The toxicological properties of these two widely prescribed NSAIDs, namely - racemic ketoprofen (rac-KP) and its enantiomer S(+)-ketoprofen (dexketoprofen, DKP) were evaluated. Firstly, by acute and chronic toxicity tests using three representative model organisms (Vibrio fischeri, Pseudokirchneriella subcapitata and Ceriodaphnia dubia). Secondly, by evaluating the responses of biotransformation systems and multidrug resistance associated proteins (MRP1/MRP2) using the PLHC-1 fish hepatic cell-line...
August 10, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28770976/non-steroidal-anti-inflammatory-drugs-nsaids-for-chronic-non-cancer-pain-in-children-and-adolescents
#7
REVIEW
Christopher Eccleston, Tess E Cooper, Emma Fisher, Brian Anderson, Nick Mr Wilkinson
BACKGROUND: Pain is a common feature of childhood and adolescence around the world, and for many young people, that pain is chronic. The World Health Organization guidelines for pharmacological treatments for children's persisting pain acknowledge that pain in children is a major public health concern of high significance in most parts of the world. While in the past pain was largely dismissed and was frequently left untreated, views on children's pain have changed over time, and relief of pain is now seen as important...
August 2, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28746994/comparison-between-several-reactors-with-trametes-versicolor-immobilized-on-lignocellulosic-support-for-the-continuous-treatments-of-hospital-wastewater
#8
J Torán, P Blánquez, G Caminal
Hospital wastewater is a major source of pharmaceutically active compounds (PhACs), which are not all removed in conventional wastewater treatment plants. White rot fungi can degrade PhACs, but their application has been limited to non-sterile conditions due to the competition with other microorganisms for growth. In this study, immobilization of Trametes versicolor on different lignocellulosic supports was studied as strategy to ensure fungal survival under continuous treatment conditions. A fluidized bed reactor and a trickling packed-bed reactor with T...
July 13, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28745761/study-of-the-simulated-sunlight-photolysis-mechanism-of-ketoprofen-the-role-of-superoxide-anion-radicals-transformation-byproducts-and-ecotoxicity-assessment
#9
Yingfei Wang, Wen Deng, Fengliang Wang, Yuehan Su, Yiping Feng, Ping Chen, Jingshuai Ma, Haiying Su, Kun Yao, Yang Liu, Wenying Lv, Guoguang Liu
The aim of this study was to investigate the photolysis mechanism of ketoprofen (KET) under simulated sunlight. The results demonstrated that the photolysis of KET aligned well with pseudo first-order kinetics. Radical scavenging experiments and dissolved oxygen experiments revealed that the superoxide anion radical (O2˙(-)) played a primary role in the photolytic process in pure water. Bicarbonate slightly increased the photodegradation of KET through generating carbonate radicals, while DOM inhibited the photolysis via both attenuating light and competing radicals...
July 26, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28737406/preclinical-effect-of-absorption-modifying-excipients-on-rat-intestinal-transport-of-five-model-compounds-and-the-intestinal-barrier-marker-51-cr-edta
#10
David Dahlgren, Carl Roos, Anders Lundqvist, Peter Langguth, Christer Tannergren, Markus Sjöblom, E Sjögren, H Lennernas
There is a renewed interest from the pharmaceutical field to develop oral formulations of compounds such as peptides, oligonucleotides, and polar drugs. However, these often suffer from insufficient absorption across the intestinal mucosal barrier. One approach to circumvent this problem is the use of absorption modifying excipient(s) (AME). This study determined the absorption enhancing effect of four AMEs (sodium dodecyl sulfate, caprate, chitosan, N-acetylcysteine) on five model compounds in a rat jejunal perfusion model...
July 24, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28736462/sequential-release-of-multiple-drugs-from-flexible-drug-delivery-films
#11
Cheryl L Jennings, Ellis K Perry, Thomas D Dziubla, David A Puleo
Sequential release of drugs aligned with the phases of tissue healing could reduce scarring. To achieve this aim, layered film devices comprising cellulose acetate phthalate (CAP) and Pluronic F-127 (Pluronic) were loaded with ketoprofen, quercetin, and pirfenidone. Citrate plasticizers were added to impart flexibility. Release of two or three drugs in sequence over several days was obtained for all multilayered devices tested. Mechanical analysis showed that elongation increased and modulus decreased with increasing plasticizer content...
2017: International Journal of Polymeric Materials
https://www.readbyqxmd.com/read/28732306/photostability-testing-using-online-reactor-hplc-hyphenation-and-mass-spectrometric-compound-identification-illustrated-by-ketoprofen-as-model-compound
#12
Jaber Assaf, Diego Zulkiewicz Gomes, Bernhard Wuest, Maria Kristina Parr
Investigations on the photochemical stability of pharmaceutical substances are mandatory in drug development and licensing as photo-induced degradation of an active pharmaceutical ingredient (API) may not only lead to decreased API concentrations but also to toxic or reactive products. Thus, the US Food and Drug Administration (FDA) and the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) issued Guidance for Industry Q1B "Photostability Testing of New Drug Substances and Products" for testing of pure but also packed drugs...
July 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28725150/development-and-evaluation-of-ketoprofen-sustained-release-matrix-tablet-using-hibiscus-rosa-sinensis-leaves-mucilage
#13
M Kaleemullah, K Jiyauddin, E Thiban, S Rasha, S Al-Dhalli, S Budiasih, O E Gamal, A Fadli, Y Eddy
Currently, the use of natural gums and mucilage is of increasing importance in pharmaceutical formulations as valuable drug excipient. Natural plant-based materials are economic, free of side effects, biocompatible and biodegradable. Therefore, Ketoprofen matrix tablets were formulated by employing Hibiscus rosa-sinensis leaves mucilage as natural polymer and HPMC (K100M) as a synthetic polymer to sustain the drug release from matrix system. Direct compression method was used to develop sustained released matrix tablets...
July 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28718961/photodegradation-kinetics-transformation-and-toxicity-prediction-of-ketoprofen-carprofen-and-diclofenac-acid-in-aqueous-solutions
#14
Jian Li, Li-Yun Ma, Lu-Shuang Li, Li Xu
In this study, the photodegradation of three commonly used non-steroidal anti-inflammatory drugs, ketoprofen (KET), carprofen (CAR) and diclofenac acid (DIC), was conducted under UV irradiation. The kinetic results showed that the studied three pharmaceuticals obeyed to the first-order reaction with the decreasing rate constants of 1.54×10(-4) s(-1) , 5.91×10(-5) s(-1) and 7.78×10(-6) s(-1) for CAR, KET and DIC, respectively. Moreover, the main transformation products (TPs) were identified by ion-pair liquid-liquid extraction combined with injection port derivatization-gas chromatography-mass spectrometer and high performance liquidchromatography-quadrupole-time of flight mass spectrometer analysis...
July 18, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28718023/two-year-survey-of-specific-hospital-wastewater-treatment-and-its-impact-on-pharmaceutical-discharges
#15
Laure Wiest, Teofana Chonova, Alexandre Bergé, Robert Baudot, Frédérique Bessueille-Barbier, Linda Ayouni-Derouiche, Emmanuelle Vulliet
It is well known that pharmaceuticals are not completely removed by conventional activated sludge wastewater treatment plants. Hospital effluents are of major concern, as they present high concentrations of pharmaceutically active compounds. Despite this, these specific effluents are usually co-treated with domestic wastewaters. Separate treatment has been recommended. However, there is a lack of information concerning the efficiency of separate hospital wastewater treatment by activated sludge, especially on the removal of pharmaceuticals...
July 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28711781/the-nature-of-hydrogen-bonding-interactions-in-nonsteroidal-anti-inflammatory-drugs-revealed-by-polarized-ir-spectroscopy
#16
Barbara Hachuła
The influence of hydrogen-bonding interactions in the solid phase on the IR spectroscopic pattern of the νOH band of nonsteroidal anti-inflammatory drugs (NSAIDs) was studied experimentally by IR spectroscopy with the use of polarized light at two temperatures (293K and 77K) and in isotopic dilution. The neat and deuterated crystals of (S)-naproxen ((S)-NPX), (R)-flurbiprofen ((R)-FBP), (RS)-flurbiprofen ((RS)-FBP) and (RS)-ketoprofen ((RS)-KTP) were obtained by melt crystallization between the two squeezed CaF2 plates...
July 9, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28710861/differential-protein-modulation-by-ketoprofen-and-ibuprofen-underlines-different-cellular-response-by-gastric-epithelium
#17
L Brandolini, M d'Angelo, A Antonosante, S Villa, L Cristiano, V Castelli, E Benedetti, M Catanesi, A Aramini, A Luini, S Parashuraman, E Mayo, A Giordano, A Cimini, M Allegretti
Ketoprofen L-lysine salt (KLS), is widely used due to its analgesic efficacy and tolerability, and L-lysine was reported to increase the solubility and the gastric tolerance of ketoprofen. In a recent report, L-lysine salification has been shown to exert a gastroprotective effect due to its specific ability to counteract the NSAIDs-induced oxidative stress and up-regulate gastroprotective proteins. In order to derive further insights into the safety and efficacy profile of KLS, in this study we additionally compared the effect of lysine and arginine, another amino acid counterion commonly used for NSAIDs salification, in control and in ethanol challenged human gastric mucosa model...
July 15, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28687530/comparison-of-segmental-dependent-permeability-in-human-and-in-situ-perfusion-model-in-rat
#18
Alejandro Ruiz-Picazo, Isabel Lozoya-Agullo, Miguel Ortiz-Azcarate, Matilde Merino-Sanjuán, Marta González-Álvarez, Isabel González-Álvarez, Marival Bermejo
Nowadays, alternative methods have been developed to predict intestinal permeability values in human as in vitro, in situ or ex vivo methods. They were developed by the necessity to avoid the problems of the human permeability experiments. However, determination of human permeability is needed to properly validate the alternative methods. For this reason, recently, Dahlgren et al. published an indirect method based on a deconvolution technique to estimate the human permeability in different gastrointestinal segments (jejunum, ileum and colon)...
July 4, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28687046/formulation-and-in-vitro-in-vivo-evaluation-of-chitosan-based-film-forming-gel-containing-ketoprofen
#19
Dong-Won Oh, Ji-Hyun Kang, Hyo-Jung Lee, Sang-Duk Han, Min-Hyung Kang, Yie-Hyuk Kwon, Joon-Ho Jun, Dong-Wook Kim, Yun-Seok Rhee, Ju-Young Kim, Eun-Seok Park, Chung-Woong Park
The film forming gel, adhered to skin surfaces upon application and formed a film, has an advantage onto skin to provide protection and continuous drug release to the application site. This study aimed to prepare a chitosan-based film forming gel containing ketoprofen (CbFG) and to evaluate the CbFG and film from CbFG (CbFG-film). CbFG were prepared with chitosan, lactic acid and various skin permeation enhancers. The physicochemical characteristics were evaluated by texture analysis, viscometry, SEM, DSC, XRD and FT-IR...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28686186/development-of-a-new-microextraction-fiber-combined-to-on-line-sample-stacking-capillary-electrophoresis-uv-detection-for-acidic-drugs-determination-in-real-water-samples
#20
Maria Espina-Benitez, Lilia Araujo, Avismelsi Prieto, Alberto Navalón, José Luis Vílchez, Paola Valera, Ana Zambrano, Vincent Dugas
A new analytical method coupling a (off-line) solid-phase microextraction with an on-line capillary electrophoresis (CE) sample enrichment technique was developed for the analysis of ketoprofen, naproxen and clofibric acid from water samples, which are known as contaminants of emerging concern in aquatic environments. New solid-phase microextraction fibers based on physical coupling of chromatographic supports onto epoxy glue coated needle were studied for the off-line preconcentration of these micropollutants...
July 7, 2017: International Journal of Environmental Research and Public Health
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