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https://www.readbyqxmd.com/read/28918561/marine-polysaccharides-therapeutic-efficacy-and-biomedical-applications
#1
REVIEW
Young-Eun Lee, Hyeongmin Kim, Changwon Seo, Taejun Park, Kyung Bin Lee, Seung-Yup Yoo, Seong-Chul Hong, Jeong Tae Kim, Jaehwi Lee
The ocean contains numerous marine organisms, including algae, animals, and plants, from which diverse marine polysaccharides with useful physicochemical and biological properties can be extracted. In particular, fucoidan, carrageenan, alginate, and chitosan have been extensively investigated in pharmaceutical and biomedical fields owing to their desirable characteristics, such as biocompatibility, biodegradability, and bioactivity. Various therapeutic efficacies of marine polysaccharides have been elucidated, including the inhibition of cancer, inflammation, and viral infection...
September 16, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28918407/burden-of-non-adherence-to-latent-tuberculosis-infection-drug-therapy-and-the-potential-cost-effectiveness-of-adherence-interventions-in-canada-a-simulation-study
#2
Anik R Patel, Jonathon R Campbell, Mohsen Sadatsafavi, Fawziah Marra, James C Johnston, Kirsten Smillie, Richard T Lester
OBJECTIVE: Pharmaceutical treatment of latent tuberculosis infection (LTBI) reduces the risk of progression to active tuberculosis (TB); however, poor adherence tempers the protective effect. We aimed to estimate the health burden of non-adherence, the maximum allowable cost of hypothetical new adherence interventions to be cost-effective and the potential value of existing adherence interventions for patients with low-risk LTBI in Canada. DESIGN: A microsimulation model of LTBI progression over 25 years...
September 15, 2017: BMJ Open
https://www.readbyqxmd.com/read/28918339/interference-of-dibutylphthalate-on-human-prostate-cell-viability
#3
Mariana Di Lorenzo, Maurizio Forte, Salvatore Valiante, Vincenza Laforgia, Maria De Falco
Dibutylphthalate (DBP) is an environmental pollutant widely used as plasticizer in a variety of industrial applications worldwide. This agent can be found in personal-care products, children's toy, pharmaceuticals, food products. Exposure to DBP can occur via ingestion and inhalation as well as intravenous or skin contact. DBP belongs to the family of endocrine disrupting chemicals (EDCs) and its effects on reproductive system were demonstrated both in vivo and in vitro. In the present study we evaluated the effects of DBP on human prostate adenocarcinoma epithelial cells (LNCaP) in order to highlight xenoestrogens influence on human prostate...
September 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28918325/a-novel-lc-ms-ms-method-for-the-quantitative-measurement-of-the-acetate-content-in-pharmaceutical-peptides
#4
Rani J Qasem, Ibrahim K Farh, Mohammed A Al Essa
Most pharmaceutical peptides are supplied as acetate salts and the relative amount of acetate to peptide in the final product is one quality criterion required by regulatory agencies to approve the product for clinical use. The objective of the present study was to develop a validated LC-MS/MS method that allows the quantitative determination of the acetate content in pharmaceutical peptide preparations and simultaneous monitoring and collection of qualitative and quantitative information on the peptide during manufacture and in the final product...
September 6, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28918314/empirical-research-evaluating-the-effects-of-non-traditional-approaches-to-enhancing-sleep-in-typical-and-clinical-children-and%C3%A2-young-people
#5
REVIEW
Karyn G France, Laurie K McLay, Jolene E Hunter, Madeline L S France
This paper examines the effects of non-traditional (non-behavioural and non-prescription pharmaceutical) approaches to sleep in children and young people (0-18 y). A systematic search identified 79 studies that met inclusion criteria. Seventeen percent of the studies were rated as having a conclusive level of evidence, forty-two percent with preponderant evidence and forty-one percent with only suggestive evidence. There were promising indications, with certain populations only, for aromatherapy, ketogenic diets, an elimination diet (few foods diet), elimination of cow's milk, avoidance of caffeine, tryptophan with adenosine and uridine, omega-3 and omega-6, valerian, music, osteopathic manipulation and white noise...
July 29, 2017: Sleep Medicine Reviews
https://www.readbyqxmd.com/read/28918286/identifying-combinatorial-biomarkers-by-association-rule-mining-in-the-camd-alzheimer-s-database
#6
Balázs Szalkai, Vince K Grolmusz, Vince I Grolmusz
The concept of combinatorial biomarkers was conceived when it was noticed that simple biomarkers are often inadequate for recognizing and characterizing complex diseases. Here we present an algorithmic search method for complex biomarkers which may predict or indicate Alzheimer's disease (AD) and other kinds of dementia. We show that our method is universal since it can describe any Boolean function for biomarker discovery. We applied data mining techniques that are capable to uncover implication-like logical schemes with detailed quality scoring...
August 17, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28918155/the-binding-of-orally-dosed-hydrophobic-active-pharmaceutical-ingredients-to-casein-micelles-in-milk
#7
M Cheema, A N Hristov, F M Harte
Casein proteins (αS1-, αS2-, β- and κ-casein) account for 80% of the total protein content in bovine milk and form casein micelles ( D¯11 = 130 nm, approximately 10(15) micelles/mL). The affinity of native casein micelles with the 3 hydrophobic active pharmaceutical ingredients (API), meloxicam [351.4 g/mol; log P = 3.43; acid dissociation constant (pKa) = 4.08], flunixin (296.2 g/mol; log P = 4.1; pKa = 5.82), and thiabendazole (201.2 g/mol; log P = 2.92; pKa = 4.64), was evaluated in bovine milk collected from dosed Holstein cows...
September 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28917989/shear-strength-of-pharmaceutical-tablets-theoretical-considerations-evaluation-and-relation-with-the-capping-tendency-of-biconvex-tablets
#8
V Mazel, H Diarra, V Busignies, P Tchoreloff
Capping is a major industrial issue during pharmaceutical powder compression, especially in the case of biconvex tablets. Several articles proposed that capping was in fact a failure in shear. Shear strength should thus be interesting to study the capping tendency of a formulation. In this work, the ratio between the shear strength and the tensile strength obtained by diametral compression was first studied from a theoretical point of view considering different failure criteria. Then, a shear test usually performed on bilayer tablets was adapted to monolayer tablets...
September 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28917987/development-and-characterisation-of-electrospun-timolol-maleate-loaded-polymeric-contact-lens-coatings-containing-various-permeation-enhancers
#9
Prina Mehta, Ali Al-Kinani, Muhammad Sohail Arshad, Ming-Wei Chang, Raid G Alany, Zeeshan Ahmad
Despite exponential growth in research relating to sustained and controlled ocular drug delivery; anatomical and chemical barriers of the eye still pose formulation challenges. Nanotechnology integration into the pharmaceutical industry has aided efforts in potential ocular drug device development. Here, the integration and in vitro effect of four different permeation enhancers (PEs) on the release of anti-glaucoma drug timolol maleate (TM) from polymeric nanofiber formulations is explored. Electrohydrodynamic (EHD) engineering, more specifically electrospinning, was used to engineer nanofibers (NFs) which coated the exterior of contact lenses...
September 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28917964/phenazopyridine-phthalimide-nano-cocrystal-release-rate-and-oral-bioavailability-enhancement
#10
Yu Huang, Jin-Mei Li, Zhi-Hui Lai, Jun Wu, Tong-Bu Lu, Jia-Mei Chen
Both cocrystal and nanocrystal technologies have been widely used in the pharmaceutical development for poorly soluble drugs. However, the synergistic effects due to the integration of these two technologies have not been well investigated. The aim of this study is to develop a nano-sized cocrystal of phenazopyridine (PAP) with phthalimide (PI) to enhance the release rate and oral bioavailability of PAP. A PAP-PI nano-cocrystal with particle diameter of 21.4±0.1nm was successfully prepared via a sonochemical approach and characterized by powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and dynamic light scattering (DLS) analysis...
September 13, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28917894/structural-functional-and-ph-sensitive-release-characteristics-of-water-soluble-polysaccharide-from-the-seeds-of-albizia-lebbeck-l
#11
Chekuri Ashok Kumar Varma, K Jayaram Kumar
Plant polysaccharides, generally regarded as safe (GRAS), are gaining importance as excipients in drug delivery. Therefore, the current paper presents the studies on structural, functional and drug release study of water soluble polysaccharide (ALPS) from seeds of Albizia lebbeck L. High swelling, water holding capacity, foam stability and lower moisture content suggests its use as additive in food preparations. The apparent molecular weight of polysaccharide was found to be 1.98×10(2)kDa. Monosaccharide composition analysis indicated that ALPS consists of mannose (4...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917892/a-mechanism-for-the-synergistic-gelation-properties-of-gelatin-b-and-xanthan-gum-aqueous-mixtures
#12
Chang-Sheng Wang, Nick Virgilio, Paula Wood-Adams, Marie-Claude Heuzey
Gelatin B and xanthan gum aqueous mixtures (GB/XG, (0.2-2%)/0.2% w/v) exhibit enhanced gelling properties compared to their pure component solutions at similar compositions. The mixed gels comprise co-localized networks of GB and XG-rich domains. Our results show that these domains are composed of intermolecular complexes and their aggregates stabilized by the neutralization effect of GB, and linked together by formation of GB triple helices. GB/XG mixtures display composition-dependent microstructural transitions: from discontinuous aggregates (GB/XG ratio≤1) to a continuous GB/XG network (ratio=2-6), followed by network fragmentation (ratio=8-10)...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917872/crystalline-nanocellulose-lauric-arginate-complexes
#13
Kai Chi, Jeffrey M Catchmark
As a novel sustainable nanomaterial, crystalline nanocellulose (CNC) possesses many unique characteristics for emerging applications in coatings, emulsions, paints, pharmaceutical formulations, and other aqueous composite systems where interactions with oppositely charged surfactants are commonly employed. Herein, the binding interactions between sulfated CNC and a novel biologically-derived cationic surfactant lauric arginate (LAE) were comprehensively examined. Ionic strength and solution pH are two crucial factors in determining the adsorption of LAE to the CNC surface...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917822/chemgenie-integration-of-chemogenomics-data-for-applications-in-chemical-biology
#14
REVIEW
Peter S Kutchukian, Charlie Chang, Sean J Fox, Erica Cook, Richard Barnard, David Tellers, Huijun Wang, Dante Pertusi, Meir Glick, Robert P Sheridan, Iain Wallace, Anne Mai Wassermann
Increasing amounts of biological data are accumulating in the pharmaceutical industry and academic institutions. However, data do not equal actionable information, and guidelines for appropriate data capture, harmonization, integration, mining, and visualization need to be established to fully harness their potential. Here, we describe ongoing efforts at Merck & Co. to structure data in the area of chemogenomics. We are integrating complementary data from both internal and external data sources into one chemogenomics database (Chemical Genetic Interaction Enterprise; CHEMGENIE)...
September 14, 2017: Drug Discovery Today
https://www.readbyqxmd.com/read/28917761/graphene-nanoribbon-fept-bimetallic-nanoparticles-uric-acid-as-a-novel-magnetic-sensing-layer-of-screen-printed-electrode-for-sensitive-determination-of-ampyra
#15
Pegah Hashemi, Hasan Bagheri, Abbas Afkhami, Salimeh Amidi, Tayyebeh Madrakian
A novel electrochemical sensor for sensitive determination of ampyra (Am) based on graphene nanoribbons modified by iron-platinum bimetallic nanoparticles and uric acid (SPCE/FePtGNR/UA) dropped on the screen-printed carbon electrode (SPCE) surface and magnetically captured onto an SPCE working electrode surface is reported in the present work. The modified nanocomposite and sensing layer was characterized by different techniques, including cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray powdered diffraction (XRD)...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917757/innovative-thin-layer-chromatographic-method-combined-with-fluorescence-detection-for-specific-determination-of-febuxostat-application-in-biological-fluids
#16
Abdel-Maaboud I Mohamed, Mahmoud A Omar, Sayed M Derayea, Mohamed A Hammad, Abobakr A Mohamed
A newly developed thin-layer chromatographic (TLC) method coupled with fluorescence detection for specific determination of Febuxostat (FEB) was designed. The proposed method adopts exposure of FEB on a developed TLC plate to hydrochloric acid vapors, resulting in a large enhancement of its weak fluorescence, permitting its specific and sensitive determination in real human plasma and urine after excitation at 345nm on 60 F254 silica gel plates using toluene-ethyl acetate-methanol-glacial acetic acid; (30:10:5:0...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917263/fourier-transform-infrared-ftir-spectrophotometry-an-ecofriendly-method-for-the-analysis-of-injectable-daptomycin
#17
Eliane Gandolpho Tótoli, Hérida Regina Nunes Salgado
Daptomycin (DPT) is an important antimicrobial agent used in clinical practice because it is very active against several types of medicinally challenging Gram-positive bacteria, such as methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococci. In addition to concerns about the quality of the analytical methods used in the QC of drugs, there is also concern about the impact of these methods on the environment. The trend toward sustainable consumption is increasingly evident and has forced the pharmaceutical industry to reduce the generation of toxic waste...
September 1, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28917192/mass-loading-and-emission-of-thirty-seven-pharmaceuticals-in-a-typical-municipal-wastewater-treatment-plant-in-hunan-province-southern-china
#18
Huiju Lin, Haipu Li, Leilei Chen, Lei Li, Ling Yin, Hsiaowan Lee, Zhaoguang Yang
The occurrence, fate, mass loading and environmental emission of 37 pharmaceuticals were studied through an integrated approach involving both dissolved and adsorbed phase at a typical wastewater treatment plant in Hunan Province, Southern China. The results displayed the prevalence of 24 and 23 compounds in dissolved phase of influent and effluent, respectively. Fourteen compounds were found adsorbed onto sludge with a mean concentration ranging from 0.85 to 2900μg/kg dry weight. Twelve compounds exhibited high adsorption potential onto suspended particulate matter (SPM) with a mean fraction ranging from 8...
September 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28916593/carnosic-acid-and-carnosol-two-major-antioxidants-of-rosemary-act-through-different-mechanisms
#19
Margot Loussouarn, Anja Krieger-Liszkay, Ljubica Svilar, Antoine Bily, Simona Birtic, Michel Havaux
Carnosic acid, a phenolic diterpene specific of the Lamiaceae family, is highly abundant in rosemary species. Despite numerous industrial and medicinal/pharmaceutical applications of its antioxidative features, this compound in planta and its antioxidant mechanism have received little attention, except a few studies of rosemary plants under natural conditions. In vitro analyses, using HPLC-UV and luminescence imaging, revealed that carnosic acid and its major oxidized derivative, carnosol, protect lipids from oxidation...
September 15, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28916492/overcoming-ocular-drug-delivery-barriers-through-the-use-of-physical-forces
#20
Di Huang, Ying-Shan Chen, Ilva D Rupenthal
Overcoming the physiological barriers in the eye remains a key obstacle in the field of ocular drug delivery. While ocular barriers naturally have a protective function, they also limit drug entry into the eye. Various pharmaceutical strategies, such as novel formulations and physical force-based techniques, have been investigated to weaken these barriers and transport therapeutic agents effectively to both the anterior and the posterior segments of the eye. This review summarizes and discusses the recent research progress in the field of ocular drug delivery with a focus on the application of physical methods, including electrical fields, sonophoresis, and microneedles, which can enhance penetration efficiency by transiently disrupting the ocular barriers in a minimally or non-invasive manner...
September 12, 2017: Advanced Drug Delivery Reviews
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