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https://www.readbyqxmd.com/read/28819756/nanofibers-grafted-on-titanium-alloy-the-effects-of-fiber-alignment-and-density-on-osteoblast-mineralization
#1
Hsin-Yi Lin, Zhao-Xiang Peng
The surface of medical implant alloy Ti-6Al-4V was chemically modified to allow it to covalently bond with collagen/PVA nanofibers. These nanofibers were successfully attached to the Ti-6Al-4V surface in three different morphologies: randomly oriented high-density fiber, COL(H); randomly oriented low-density fiber, COL(L); and aligned high-density fiber, COL(A). The effects of the morphology of these covalently-bound collagen nanofibers on the growth and differentiation of osteoblasts were studied for 21 days...
August 17, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28818454/the-anti-tumor-effect-of-intravesical-administration-of-normal-urothelial-cells-on-bladder-cancer
#2
Chi-Ping Huang, Chi-Cheng Chen, Chih-Rong Shyr
BACKGROUND AIMS: Urothelial bladder cancer (UBC) is the second most common cancer of the genitourinary tract and for advanced forms of the disease it has a high mortality rate. There are no approved new molecularly targeted agents or chemotherapeutics for advanced UBC beyond cisplatin-based chemotherapy except the recently approved anti-programmed death ligand 1 (anti-PD-1/PD-L1) antibody. With complex genetic and epigenetic alterations in tumors, despite several druggable targets identified, to cure UBC is still a challenging unmet medical need...
August 14, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28818003/hybrid-a-cnh-tio2-tin-type-surface-layers-produced-on-niti-shape-memory-alloy-for-cardiovascular-applications
#3
Justyna Witkowska, Agnieszka Sowińska, Elżbieta Czarnowska, Tomasz Płociński, Janusz Kamiński, Tadeusz Wierzchoń
AIM: The goal was to improve the properties of NiTi shape memory alloy to make it suitable for cardiac applications. For this purpose, a hybrid a-CNH+TiO2+TiN-type surface layer was produced on NiTi alloy and characterized. MATERIALS & METHODS: The NiTi alloy subjected to hybrid process combining low-temperature oxynitriding under glow discharge conditions and radio frequency chemical vapor deposition process was examined for microstructure, surface topography, corrosion resistance, wettability and surface-free energy, Ni ion release and platelets adhesion, aggregation and activation...
August 18, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28815276/determination-of-89-drugs-and-other-micropollutants-in-unfiltered-wastewater-and-freshwater-by-lc-ms-ms-an-alternative-sample-preparation-approach
#4
Alexandros G Asimakopoulos, Pranav Kannan, Sean Higgins, Kurunthachalam Kannan
A liquid chromatography-triple quadrupole-tandem mass spectrometry (LC-qQq-MS/MS) method was developed for simultaneous determination of 89 legal neuropsychiatric pharmaceuticals and illicit drugs (both parent compounds and metabolites) and other micropollutants in unfiltered wastewater and freshwater. The target chemicals fall under the classes of amphetamine-type stimulants, cocaine compounds, opiates and opioids, benzodiazepines, lysergic compounds, antipsychotics, anesthetics, antiepileptics, antidepressants, sympathomimetics, cannabinoids, blood thinners, antihistamines, β-blockers, caffeine derivatives, nicotine derivatives, z-drugs, new designer drugs, and Alzheimer medications...
August 16, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28814860/quantum-dots-in-imaging-drug-delivery-and-sensor-applications
#5
REVIEW
Cristian T Matea, Teodora Mocan, Flaviu Tabaran, Teodora Pop, Ofelia Mosteanu, Cosmin Puia, Cornel Iancu, Lucian Mocan
Quantum dots (QDs), also known as nanoscale semiconductor crystals, are nanoparticles with unique optical and electronic properties such as bright and intensive fluorescence. Since most conventional organic label dyes do not offer the near-infrared (>650 nm) emission possibility, QDs, with their tunable optical properties, have gained a lot of interest. They possess characteristics such as good chemical and photo-stability, high quantum yield and size-tunable light emission. Different types of QDs can be excited with the same light wavelength, and their narrow emission bands can be detected simultaneously for multiple assays...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28814163/protease-activated-nanomaterials-for-targeted-cancer-theranostics
#6
Yung-Chieh Chan, Michael Hsiao
Cancer metastasis accompanies irreversible proteolysis. Malignant cells that abnormally express extracellular proteases usually lead to a poor outcome during cancer progression. The development of protease-activated drugs is an important goal. Moreover, the specific proteolytic mechanism can be used as a diagnostic strategy. Currently, nanotechnology for use in medication has been extensively developed to exploit the physical and chemical properties of nanoparticles. For example, to improve the efficacy of cancer therapy drugs, targeted delivery has been attempted by combining a targeting ligand with a nanoparticle...
August 17, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28813773/a-case-of-ivig-induced-aseptic-chemical-meningitis
#7
Anish Patel, Kalyan Chakravarthy Potu, Tamera Sturm
Intravenous immunoglobulin (IVIG) is a commonly used and generally well-tolerated medication. Common side effects include flu-like symptoms such as fevers, headaches, myalgia, fatigue, and nausea. One of the more rare side effects is aseptic meningitis, with a reported incidence rate of around 0.067 percent of all IVIG infusions. In this paper, we describe a 47-year-old female patient with a history of myasthenia gravis who presented with a headache, neck pain, and neck stiffness while undergoing IVIG infusions for a myasthenia crisis...
March 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28813557/facial-erosive-pustular-dermatosis-after-cosmetic-resurfacing
#8
Julie E Mervak, Stephanie D Gan, Emily H Smith, Frank Wang
Importance: Erosive pustular dermatosis (EPD) is a rare condition that typically affects actinically damaged skin of the scalp. Characterized by sterile pustules, erosions, and crusts, EPD is difficult to treat and heals slowly. The exact cause of EPD is unknown, although trauma is an inciting factor. Objective: To describe 3 women who presented with prolonged facial erosions after cosmetic resurfacing procedures, specifically fully ablative carbon dioxide laser or medium-depth chemical peel...
August 16, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28811565/iss-pc-identifying-splicing-sites-via-physical-chemical-properties-using-deep-sparse-auto-encoder
#9
Zhao-Chun Xu, Peng Wang, Wang-Ren Qiu, Xuan Xiao
Gene splicing is one of the most significant biological processes in eukaryotic gene expression, such as RNA splicing, which can cause a pre-mRNA to produce one or more mature messenger RNAs containing the coded information with multiple biological functions. Thus, identifying splicing sites in DNA/RNA sequences is significant for both the bio-medical research and the discovery of new drugs. However, it is expensive and time consuming based only on experimental technique, so new computational methods are needed...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28809934/long-term-exposure-to-air-pollution-and-the-incidence-of-parkinson-s-disease-a-nested-case-control-study
#10
Chiu-Ying Chen, Hui-Jung Hung, Kuang-Hsi Chang, Chung Y Hsu, Chih-Hsin Muo, Chon-Haw Tsai, Trong-Neng Wu
BACKGROUND: Previous studies revealed that chronic exposure to air pollution can significantly increase the risk of the development of Parkinson's disease (PD), but this relationship is inconclusive as large-scale prospective studies are limited and the results are inconsistent. Therefore, the purpose of this study was to ascertain the adverse health effects of air pollution exposure in a nationwide population using a longitudinal approach. MATERIALS AND METHODS: We conducted a nested case-control study using the National Health Insurance Research Dataset (NHIRD), which consisted of 1,000,000 beneficiaries in the National Health Insurance Program (NHI) in the year 2000 and their medical records from 1995 to 2013 and using public data on air pollution concentrations from monitoring stations across Taiwan released from the Environmental Protection Administration to identify people with ages ≥ 40 years living in areas with monitoring stations during 1995-1999 as study subjects...
2017: PloS One
https://www.readbyqxmd.com/read/28809421/-reactive-nano-complex-coated-medical-cotton-a-facile-avenue-for-tailored-release-of-small-molecules
#11
Adil Majeed Rather, Sulendar Mahato, Kousik Maji, Neeha Gogoi, Uttam Manna
Controlled and sustained release of drug-like small molecules in an aqueous medium still remains a challenging problem due to rapid infiltration of liquid water in most reported drug release systems. However, internal-superhydrophobicity with an antifouling property extending beyond the surface of a material recently has been recognized as a potential avenue for sustained and extended release of drug-like small molecules. Sluggish removal of metastable trapped air in a superhyrophobic material provides a basis to achieve extended release of encapsulated small molecules...
August 15, 2017: Nanoscale
https://www.readbyqxmd.com/read/28807159/herb-drug-interactions-of-commonly-used-chinese-medicinal-herbs
#12
Amrinder Singh, Kaicun Zhao
With more and more popular use of traditional herbal medicines, in particular Chinese herbal medicines, herb-drug interactions have become a more and more important safety issue in the clinical applications of the conventional drugs. Researches in this area are increasing very rapidly. Herb-drug interactions are complicated due to the fact that multiple chemical components are involved, and these compounds may possess diverse pharmacological activities. Interactions can be in both pharmacokinetics and pharmacodynamics...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28805046/electroenhanced-antimicrobial-coating-based-on-conjugated-polymers-with-covalently-coupled-silver-nanoparticles-prevents-staphylococcus-aureus-biofilm-formation
#13
Salvador Gomez-Carretero, Rolf Nybom, Agneta Richter-Dahlfors
The incidence of hospital-acquired infections is to a large extent due to device-associated infections. Bacterial attachment and biofilm formation on surfaces of medical devices often act as seeding points of infection. To prevent such infections, coatings based on silver nanoparticles (AgNPs) are often applied, however with varying clinical success. Here, the traditional AgNP-based antibacterial technology is reimagined, now forming the base for an electroenhanced antimicrobial coating. To integrate AgNPs in an electrically conducting polymer layer, a simple, yet effective chemical strategy based on poly(hydroxymethyl 3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT-MeOH:PSS) and (3-aminopropyl)triethoxysilane is designed...
August 14, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28801182/prediction-of-regioselectivity-and-preferred-order-of-metabolisms-on-cyp1a2-mediated-reactions-part-2-solving-substrate-interactions-of-cyp1a2-with-non-pah-substrates-on-the-template-system
#14
Yasushi Yamazoe, Kouichi Yoshinari
In our previous paper (Drug Metabolism Parmacokinet31: 363, 2016), a simulation system for ligand interactions of human CYP1A2 was developed using "Template" composed of hexagonal grids focusing on polyaromatic hydrocarbons (PAHs). The system has been expanded for the application of non-PAH chemicals including medical drugs, industrial chemicals and natural products in the present study. Additions of two Templates C and D around Ring C/E and Ring B, respectively, perpendicular each to Template A, offered the accommodation of non-PAH substrates...
May 29, 2017: Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/28799741/early-assessment-and-correlations-of-nanoclay-s-toxicity-to-their-physical-and-chemical-properties
#15
Alixandra Wagner, Andrew White, Todd A Stueckle, Derrick Banerjee, Konstantinos A Sierros, Yon Rojanasakul, Sushant Agarwal, Rakesh K Gupta, Cerasela Zoica Dinu
Nanoclays' functionalization with organic modifiers increases their individual barrier properties, thermal stability, and mechanical properties and allows for ease of implementation in food packaging materials or medical devices. Previous reports have showed that while organic modifiers integration between the layered mineral silicates leads to nanoclays with different degrees of hydrophobicity that become easily miscible in polymers, they could also pose possible effects at inhalation or ingestion routes of exposure...
August 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28799295/application-of-the-stopp-start-criteria-to-a-medical-record-database
#16
Katinka J Nauta, Feikje Groenhof, Jan Schuling, Jacqueline G Hugtenburg, Hein P J van Hout, Flora M Haaijer-Ruskamp, Petra Denig
PURPOSE: The STOPP/START criteria are increasingly used to assess prescribing quality in elderly patients at practice level. Our aim was to test computerized algorithms for applying these criteria to a medical record database. METHODS: STOPP/START criteria-based computerized algorithms were defined using Anatomical-Therapeutic-Chemical (ATC) codes for medication and International Classification of Primary Care (ICPC) codes for diagnoses. The algorithms were applied to a Dutch primary care database, including patients aged ≥65 years using ≥5 chronic drugs...
August 11, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28799125/non-polymer-drug-eluting-coronary-stents
#17
REVIEW
Nagavendra Kommineni, Raju Saka, Wahid Khan, Abraham J Domb
Cardiovascular complications are leading causes of most fatalities. Coronary artery disease and surgical failures contribute to the death of the majority of patients. Advanced research in the field of medical devices like stents has efficiently resolved these problems. Clinically, drug-eluting stents have proven their efficacy and safety compared to bare metal stents, which have problems of in-stent restenosis. However, drug-loaded stents coated with polymers have shown adverse effects related to the stability and deterioration of the polymer coating over time...
August 10, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28798526/environmental-pollution-and-allergies
#18
REVIEW
Hirohisa Takano, Ken-Ichiro Inoue
Environmental changes are thought to be the main factor in the rapid increase and worsening of allergic diseases. While there have been significant changes in many environmental factors, including in environments such as residential, health and sanitation, food, and water/soil/atmospheric environments, the root of each of these changes is likely an increase in chemical substances. In fact, various environmental pollutants, such as air pollutants and chemical substances, have been shown to worsen various allergies in experimental studies...
July 2017: Journal of Toxicologic Pathology
https://www.readbyqxmd.com/read/28796657/microneedling-a-review-and-practical-guide
#19
Tina S Alster, Paul M Graham
BACKGROUND: Microneedling is a relatively new treatment option in dermatology and has been touted for a broad range of applications including skin rejuvenation, acne scarring, rhytides, surgical scars, dyschromia, melasma, enlarged pores, and transdermal drug delivery. The significant increase in minimally invasive procedures that has been reported over the past several years suggest that microneedling may occupy a specific niche for patients who desire measurable clinical results from treatments with little to no recovery...
August 7, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28795887/cold-atmospheric-pressure-plasmas-exhibit-antimicrobial-properties-against-critical-bacteria-and-yeast-species
#20
C Wiegand, S Fink, U-C Hipler, O Beier, K Horn, A Pfuch, A Schimanski, B Grünler
OBJECTIVE: Cold atmospheric pressure plasmas (CAPPs) have been used to sterilise implant materials and other thermally unstable medical products and to modify chemical surfaces. This study investigates the antimicrobial effect of the gas and input power used to generate CAPPs on microorganisms causing skin infections, such as Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans and Malassezia pachydermatis. METHOD: Microorganisms were cultivated on Mueller Hinton 2 (MH2) agar plates...
August 2, 2017: Journal of Wound Care
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