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https://www.readbyqxmd.com/read/29150967/drug-delivery-strategies-for-chemoprevention-of-uvb%C3%A2-induced-skin-cancer-a-review
#1
REVIEW
Arvind Bagde, Arindam Mondal, Mandip Singh
Annually, more skin cancer cases are diagnosed than the collective incidence of the colon, lung, breast and prostate cancer. Persistent contact with sunlight is a primary cause for all the skin malignancies. UVB radiation induces reactive oxygen species (ROS) production in the skin which eventually leads to DNA damage and mutation. Various delivery approaches for the skin cancer treatment/prevention have been evolving and are directed towards improvements in terms of delivery modes, therapeutic agents and site-specificity of therapeutics delivery...
November 18, 2017: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/29150138/new-hybrid-adsorbent-based-on-porphyrin-functionalized-silica-for-heavy-metals-removal-synthesis-characterization-isotherms-kinetics-and-thermodynamics-studies
#2
Smaail Radi, Chahrazad El Abiad, Nuno M M Moura, Maria A F Faustino, M Graça P M S Neves
The pollution of water resources due to the disposal of toxic heavy metals has been a growing global concern for the last decades. For this purpose, the search for effective and economic material based adsorbents is required, due to the efficiency of the process. In this work, a novel inorganic-organic hybrid material based on silica chemically modified with a porphyrin (SiNTPP), with a high metal removal efficiency, was developed. The new material was characterized using a set of suitable techniques such as (13)C NMR of the solid state, elemental analysis, FTIR, nitrogen adsorption-desorption isotherm, BET surface area, BJH pore sizes and scanning electron microscopy (SEM)...
November 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29149883/serum-concentrations-of-krebs-von-den-lungen-6-surfactant-protein-d-and-matrix-metalloproteinase-2-as-diagnostic-biomarkers-in-patients-with-asbestosis-and-silicosis-a-case-control-study
#3
Changjiang Xue, Na Wu, Xue Li, Meihua Qiu, Xuqin Du, Qiao Ye
BACKGROUND: Asbestosis and silicosis are progressive pneumoconioses characterized by interstitial fibrosis following exposure to asbestos or silica dust. We evaluated the potential diagnostic biomarkers for these diseases. METHODS: The serum concentrations of Krebs von den Lungen-6 (KL-6), surfactant protein D (SP-D), and matrix metalloproteinase-2 (MMP-2), MMP-7, and MMP-9 were measured in 43 patients with asbestosis, 45 patients with silicosis, 40 dust-exposed workers (DEWs) without pneumoconiosis, and 45 healthy controls (HCs)...
November 17, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29149736/graphene-oxide-reinforced-ionic-liquid-functionalized-adsorbent-for-solid-phase-extraction-of-phenolic-acids
#4
Xiudan Hou, Xiaofeng Lu, Sheng Tang, Licheng Wang, Yong Guo
An environmental friendly sorbent of polymeric ionic liquids modified graphene oxide-grafted silica (PILs@GO@Sil) was synthesized for solid-phase extraction (SPE) of phenolic acids. The sorbent was prepared via a chemical layer-to-layer fabrication including amidation reaction, surface radical chain-transfer polymerization and in situ anion exchange. After modification with PILs, the silica surface had higher positive potential so that it would exhibit stronger electrostatic interaction for acidic compounds compared with GO@Sil...
November 12, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29149688/ultrahigh-sensitive-enhanced-electrochemiluminescence-detection-of-cancer-biomarkers-using-silica-nps-graphene-oxide-a-comparative-study
#5
Hamid Kooshki, Jamal Rashidiani, Mehdi Kamali, Hamid Sedighian, Mostafa Akbariqomi, Mansour Mansouri
The increasing progress in using nano-biomaterials for medical purposes has opened new horizons toward researchers around the globe. To investigate the presence of these nanomaterials and the impacts they might have, a comparative enhanced-electrochemiluminescence immunosensing study has been designed. The effects of utilizing graphene oxide, silica, and gold nanoparticles in cancer diagnosis were evaluated during the quantification of two major cancer biomarkers (CEA and AFP) in different approaches. In other words, first and second approaches were designed to employ nanomaterials while third and fourth approaches were developed in absence of those...
November 8, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29149424/botanical-origin-and-chemical-constituents-of-commercial-saposhnikoviae-radix%C3%A2-and-its-related-crude-drugs-available-in-shaanxi-and-the-surrounding-regions
#6
Takuro Maruyama, Masami Ezaki, Mao Shiba, Hiroki Yamaji, Taichi Yoshitomi, Noriaki Kawano, Shu Zhu, Xiao Cheng, Tsuguo Yokokura, Yutaka Yamamoto, Hiroyuki Fuchino, Hang Sun, Katsuko Komatsu, Nobuo Kawahara
Saposhnikoviae radix (SR) is described in the Japanese Pharmacopoeia as a crude drug derived from the root of Saposhnikovia divaricata Schischkin (Umbelliferae). According to Flora of China, the root of Peucedanum ledebourielloides K. F. Fu is used as a regional substitute for SR. Therefore, we surveyed the botanical origin of the drug used in China, especially Shaanxi and the surrounding regions, through nucleotide sequence analysis of the internal transcribed spacer region of rDNA. As a result, several samples from Shaanxi () and Shanxi () provinces were identified as Peucedanum ledebourielloides...
November 17, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/29148804/a-nanobionic-light-emitting-plant
#7
Seon-Yeong Kwak, Juan Pablo Giraldo, Min Hao Wong, Volodymyr Koman, Tedrick Lew, Jon Ell, Mark Weidman, Rosalie Sinclair, Markita P Landry, William A Tisdale, Michael S Strano
The engineering of living plants for visible light emission and sustainable illumination is compelling because plants possess independent energy generation and storage mechanisms and autonomous self-repair. Herein, we demonstrate a plant nanobionic approach that enables exceptional luminosity and lifetime utilizing four chemically-interacting nanoparticles, including firefly luciferase conjugated silica (SNP-Luc), D-luciferin releasing poly(lactic-co-glycolic acid) (PLGA-LH2), coenzyme A functionalized chitosan (CS-CoA) and semiconductor nanocrystal phosphors for longer wavelength modulation...
November 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/29148709/nir-emitting-nanoprobes-based-on-cyclic-rgd-motif-conjugated-pbs-quantum-dots-for-integrin-targeted-optical-bioimaging
#8
Nicoletta Depalo, Michela Corricelli, Ivan de Paola, Gianpiero Valente, Rosa M Iacobazzi, Emiliano Altamura, Doriana Debellis, Daniela Comegna, Elisabetta Fanizza, Nunzio Denora, Valentino Laquintana, Fabio Mavelli, Marinella Striccoli, Michele Saviano, Angela Agostiano, Annarita Del Gatto, Laura Zaccaro, Maria Lucia Curri
Here, silica coated PbS quantum dots (QDs) with photoluminesce emission properties in the near-infrared (NIR) region are proposed as potential effective single particle optical nanoprobes for future in vivo imaging of tumors. The dispersibility in aqueous medium of hydrophobic PbS QDs was accomplished by growing a silica shell on their surface by exploiting a base assisted water-in-oil microemulsion method. The silica coated PbS QDs were then conjugated with specifically designed cyclic arginine-glycine-aspartic acid (cRGD) peptide, that are able to specifically recognizes the αvβ3 integrins which is overexpressed in the angiogenic tumor induced vasculatures and on some solid tumours, in order to achieve a tumor-specific targeting...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29148604/biomass-derived-n-doped-carbons-with-silica-supported-ultrasmall-zno-nanoparticles-robust-catalysts-for-the-green-synthesis-of-benzimidazoles
#9
Bo Chen, Chan Zhang, Libo Niu, Xiaozhen Shi, Huiling Zhang, Xingwang Lan, Guoyi Bai
Ultrasmall ZnO nanoparticles anchored on N-doped carbons with silica support (ZnO/SiO2-NC) were fabricated from chitosan and metal ions using a one-pot self-assembly strategy, and were successfully applied to the synthesis of 2-arylbenzimidazoles under mild conditions. These catalysts showed excellent stability and could be used six times without loss of conversion and selectivity. Using silica gel and biomass chitosan as a source of hydrophilic N-doped carbon facilitated the uniform dispersion of the ZnO nanoparticles in methanol and therefore their contact with reactants, contributing to a high catalytic performance...
November 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29147508/chiral-nanoprobes-for-targeting-and-long-term-imaging-of-the-golgi-apparatus
#10
Rong Sheng Li, Peng Fei Gao, Hong Zhi Zhang, Lin Ling Zheng, Chun Mei Li, Jian Wang, Yuan Fang Li, Feng Liu, Na Li, Cheng Zhi Huang
The Golgi apparatus is an essential subcellular organelle. Targeting and monitoring the Golgi change at the single-cell level over a long time scale are critical but are challenges that have not yet been tackled. Inspired by the precise Golgi positioning ability of galactosyltransferase and protein kinase D, due to their cysteine residues, we developed a method for long-term Golgi imaging. Fluorescent molecules, carbon quantum dots (CQDs) and silica nanoparticles could target the Golgi when they are modified with l-cysteine...
October 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29147000/stable-icg-loaded-upconversion-nanoparticles-silica-core-shell-theranostic-nanoplatform-for-dual-modal-upconversion-and-photoacoustic-imaging-together-with-photothermal-therapy
#11
Ruichan Lv, Depeng Wang, Liyang Xiao, Guanying Chen, Jun Xia, Paras N Prasad
We report here the design and multiple functions of a new hierarchical nanotheronostic platform consisting of an upconversion nanoparticle (UCNP) core: shell with an additional mesoporous silica (mSiO2) matrix load shell containing sealed, high concentration of ICG molecules. We demonstrate that this UCNP@mSiO2-ICG nanoplatform can perform the following multiple functions under NIR excitation at 800 nm: 1) Light harvesting by the UCNP shell containing Nd and subsequent energy transfer to Er in the Core to produce efficient green and red upconversion luminescence for optical imaging; 2) Efficient nonradiative relaxation and local heating produced by concentration quenching in aggregated ICG imbedded in the mesopourous silica shell to enable both photoacoustic imaging and photothermal therapy...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146973/graphene-balls-for-lithium-rechargeable-batteries-with-fast-charging-and-high-volumetric-energy-densities
#12
In Hyuk Son, Jong Hwan Park, Seongyong Park, Kwangjin Park, Sangil Han, Jaeho Shin, Seok-Gwang Doo, Yunil Hwang, Hyuk Chang, Jang Wook Choi
Improving one property without sacrificing others is challenging for lithium-ion batteries due to the trade-off nature among key parameters. Here we report a chemical vapor deposition process to grow a graphene-silica assembly, called a graphene ball. Its hierarchical three-dimensional structure with the silicon oxide nanoparticle center allows even 1 wt% graphene ball to be uniformly coated onto a nickel-rich layered cathode via scalable Nobilta milling. The graphene-ball coating improves cycle life and fast charging capability by suppressing detrimental side reactions and providing efficient conductive pathways...
November 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/29146540/temperature-sensitive-copolymer-coated-fluorescent-mesoporous-silica-nanoparticles-as-a-reactive-oxygen-species-activated-drug-delivery-system
#13
Feng Yu, Huijing Wu, Yao Tang, Yufang Xu, Xuhong Qian, Weiping Zhu
In this study, a temperature and ROS-responsive drug delivery system ROSP@MSN based on mesoporous silica nanoparticles has been designed and synthesized by taking advantage of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl acrylate modified polymers (ROSP) as "nano-valve", which can respond selectively to cancer exclusive microenvironment and implement targeted drug release. Due to the superior temperature-sensitive properties of ROSP, ROSP@MSN could achieve cargo loading in cold water, and subsequently close the pore by raising temperature to obtain ROSP@MSN@DOX...
November 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29146425/unprecedented-sensitivity-of-the-planar-yeast-estrogen-screen-by-using-a-spray-on-technology
#14
Andreas Schoenborn, Pascal Schmid, Sarah Bräm, Georg Reifferscheid, Marina Ohlig, Sebastian Buchinger
The planar yeast estrogen screen (p-YES) can serve as a highly valuable and sensitive screening tool for the detection of estrogenic compounds in various sample matrices such as water and wastewater, personal care products and foodstuff. The method combines the separation of sample constituents by thin layer chromatography with the direct detection of estrogenic compounds on the surface of the HPTLC-plate. The previous protocol using the immersion of a normal phase silica HPTLC-plate in a cell suspension for bio-autography resulted in blurred signals due to the accelerated diffusion of compounds on the wet surface of the HPTLC-plate...
November 7, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29146256/isolation-purification-structural-elucidation-and-antimicrobial-activities-of-kocumarin-a-novel-antibiotic-isolated-from-actinobacterium-kocuria-marina-cmg-s2-associated-with-the-brown-seaweed-pelvetia-canaliculata
#15
Bushra Uzair, Farid Menaa, Barkat Ali Khan, Faryal Vali Mohammad, Viqar Uddin Ahmad, Ryad Djeribi, Bouzid Menaa
AIMS: Screening of seaweed-associated bacteria capable of producing antimicrobials. METHODS AND RESULTS: Fifteen microbial strains, associated to the brown seaweed Pelvetia canaliculata (Linnaeus) attached to the rocks of Sonmiani Beach (Karachi, Pakistan), were screened. Crude extract filtrates of CMG S2 strain grew on Zobell marine agar (ZMA) had the most remarkable antimicrobial activity. Based on its phenotypic aspects (e.g. Gram-positive, microccoid form), biochemical characteristics (e...
January 2018: Microbiological Research
https://www.readbyqxmd.com/read/29145172/volatiles-from-cinnamomum-cassia-buds
#16
Daniel Sandner, Ulrich Krings, Ralf G Berger
While the chemical composition of leaf and stem bark essential oils of the Chinese cinnamon, Cinnamomum cassia (L.) J. Presl, has been well investigated, little is known about the volatilom of its buds, which appeared recently on German markets. Soxhlet extracts of the commercial samples were prepared, fractionated using silica gel and characterised by gas chromatography-flame ionisation detector (GC-FID) for semi-quantification, by gas chromatography-mass spectrometry (GC-MS) for identification and by GC-FID/olfactometry for sensory evaluation...
November 16, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29144425/selective-laser-sintering-of-porous-silica-enabled-by-carbon-additive
#17
Shuai Chang, Liqun Li, Li Lu, Jerry Ying Hsi Fuh
The aim of this study is to investigate the possibility of a freeform fabrication of porous ceramic parts through selective laser sintering (SLS). SLS was proposed to manufacture ceramic green parts because this additive manufacturing technique can be used to fabricate three-dimensional objects directly without a mold, and the technique has the capability of generating porous ceramics with controlled porosity. However, ceramic printing has not yet fully achieved its 3D fabrication capabilities without using polymer binder...
November 16, 2017: Materials
https://www.readbyqxmd.com/read/29144310/preparation-of-ureido-functionalized-pva-silica-mesoporous-fibre-membranes-via-electrospinning-for-adsorption-of-pb-2-and-cu-2-in-wastewater
#18
Meimei Zhou, Weizhen Tang, Pingping Luo, Jiqiang Lyu, Aixia Chen, Longkai Qiao, Daniel Nover
Ureido-functionalized mesoporous polyvinyl alcohol/silica composite nanofibre membranes were prepared by electrospinning technology and their application for removal of Pb(2+) and Cu(2+) from wastewater was discussed. The characteristics of the membranes were investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and N2 adsorption-desorption analysis. Results show that the membranes have long fibrous shapes and worm-like mesoporous micromorphologies. Fourier transform infrared spectroscopy confirmed the membranes were successfully functionalized with ureido groups...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29143884/biominerals-and-waxes-of-calamagrostis-epigejos-and-phragmites-australis-leaves-from-post-industrial-habitats
#19
Ewa Talik, Adam Guzik, Eugeniusz Małkowski, Gabriela Woźniak, Edyta Sierka
Vascular plants are able to conduct biomineralization processes and collect synthesized compounds in their internal tissues or to deposit them on their epidermal surfaces. This mechanism protects the plant from fluctuations of nutrient levels caused by different levels of supply and demand for them. The biominerals reflect both the metabolic characteristics of a vascular plant species and the environmental conditions of the plant habitat. The SEM/EDX method was used to examine the surface and cross-sections of the Calamagrostis epigejos and Phragmites australis leaves from post-industrial habitats (coal and zinc spoil heaps)...
November 16, 2017: Protoplasma
https://www.readbyqxmd.com/read/29143840/nonaffine-deformation-and-tunable-yielding-of-colloidal-assemblies-at-the-air-water-interface
#20
Armando Maestro, Alessio Zaccone
Silica nanoparticles trapped at the air-water interface form a 2D solid state with amorphous order. We propose a theoretical model to describe how this solid-like state deforms under a shear strain ramp up to and beyond a yielding point which leads to plastic flow. The model accounts for all the particle-level and many-body physics of the system: nonaffine displacements, local connectivity and its evolution in terms of cage-breaking, and interparticle interactions mediated by the particle chemistry and colloidal forces...
November 16, 2017: Nanoscale
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