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https://www.readbyqxmd.com/read/27924380/adherence-to-the-2006-american-heart-association-s-diet-and-lifestyle-recommendations-for-cardiovascular-disease-risk-reduction-is-associated-with-bone-mineral-density-in-older-chinese
#1
G D Chen, D Ding, H Y Tian, Y Y Zhu, W T Cao, C Wang, Y M Chen
: This cross-sectional study investigated the association between the modified 2006 American Heart Association Diet and Lifestyle Recommendations (AHA-DLR) and bone mineral density in Chinese adults. We found that better adherence to the AHA-DLR associated with higher bone mineral density (BMD) at multiple sites. INTRODUCTION: Accumulating evidence shows that cardiovascular disease (CVD) and osteoporosis are associated with each other, yet little research has focused on whether strategies to reduce CVD risk could also benefit bone health...
December 6, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27923210/study-on-the-interactional-behaviour-of-transition-metal-ions-with-myoglobin-a-detailed-calorimetric-spectroscopic-and-light-scattering-analysis
#2
Amandeep Kaur, Parampaul K Banipal, Tarlok S Banipal
The energetics and the impact on the conformation of heme containing protein myoglobin (Mb) due to the binding of three transition metal ions (Zn(2+), Ni(2+), and Mn(2+)) have been investigated using isothermal titration calorimetry (ITC), dynamic light scattering (DLS), UV-vis, and circular dichroism (CD) spectroscopy under physiological conditions. The binding affinity of the order of 10(4)M(-1) has been observed for all metal ions from calorimetry as well as from absorption spectroscopy. The binding of these metal ions with Mb is a spontaneous process that exposes the hydrophobic groups away from the protein core as exhibited by the negative Gibbs free energy change (ΔG) and positive heat capacity change (ΔCp) values...
November 27, 2016: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/27919801/folic-acid-capped-pegylated-magnetic-nanoparticles-enter-cancer-cells-mostly-via-clathrin-dependent-endocytosis
#3
Emilie Allard-Vannier, Katel Hervé-Aubert, Karine Kaaki, Thibaut Blondy, Anastasia Shebanova, Konstantin V Shaitan, Anastasia A Ignatova, Marie-Louise Saboungi, Alexey V Feofanov, Igor Chourpa
BACKGROUND: This work is focused on mechanisms of uptake in cancer cells of rationally designed, covalently assembled nanoparticles, made of superparamagnetic iron oxide nanoparticles (SPIONs), fluorophores (doxorubicin or Nile Blue), polyethylene glycol (PEG) and folic acid (FA), referred hereinafter as SFP-FA. METHODS: SFP-FA were characterized by DLS, zetametry and fluorescence spectroscopy. The SFP-FA uptake in cancer cells was monitored using fluorescence-based methods like fluorescence-assisted cell sorting, LSCM with single-photon and two-photon excitation...
December 2, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27916693/comparison-of-2-strategies-to-enhance-pyridoclax-solubility-nanoemulsion-delivery-system-versus-salt-synthesis
#4
A-C Groo, M De Pascale, A-S Voisin-Chiret, S Corvaisier, M Since, A Malzert-Fréon
Pyridoclax is an original oligopyridine lead, very promising in treatment of chemoresistant cancers. However, from solubility measurement and permeability evaluation, it appeared that this compound can be considered as a BCS II drug, with a poor water solubility. To overcome this unfavorable property, two strategies were proposed and compared: pyridoclax di-hydrochloride salt synthesis and formulation of pyridoclax-loaded nanoemulsions (PNEs) efficiently performed by transposing the spontaneous emulsification process previously developed by our team...
December 1, 2016: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27916692/the-effects-of-bacteria-nanoparticles-interface-on-the-antibacterial-activity-of-green-synthesized-silver-nanoparticles
#5
Aftab Ahmad, Yun Wei, Fatima Syed, Kamran Tahir, Aziz Ur Rehman, Arifullah Khan, Sadeeq Ullah, Qipeng Yuan
Neutralization of bacterial cell surface potential using nanoscale materials is an effective strategy to alter membrane permeability, cytoplasmic leakage, and ultimate cell death. In the present study, an attempt was made to prepare biogenic silver nanoparticles using biomolecules from the aqueous rhizome extract of Coptis Chinensis. The biosynthesized silver nanoparticles were surface modified with chitosan biopolymer. The prepared silver nanoparticles and chitosan modified silver nanoparticles were cubic crystalline structures (XRD) with an average particle size of 15 and 20 nm respectively (TEM, DLS)...
December 1, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/27915030/the-effect-of-anionic-dicephalic-surfactants-on-fabrication-of-varied-core-nanocarriers-for-sustained-release-of-porphyrin-photosensitizers
#6
Urszula Bazylińska, Renata Frąckowiak, Zbigniew Brzózka, Kazimiera A Wilk
Double-headed anionic surfactants could provide a profound group of efficient stabilizers of new template-mediated nanocarriers for effective encapsulation and sustained release of highly hydrophobic photosensitizers, and therefore their improved therapeutic activity in photodynamic therapy (PDT) protocols. We have thus encapsulated porphyrin-origin dyes, i.e., verteporfin (VP) and meso-tetraphenylporphyrin (TPP) in different types of sodium alkyliminobisacetates, Cn(COONa)2-stabilized nanosystems including biocompatible poly(l-glutamic acid)/poly(l-lysine) - PGA/PLL, multilayer nanocapsules (NCs)...
November 19, 2016: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/27915029/cytotoxicity-study-of-piper-nigrum-seed-mediated-synthesized-sno2-nanoparticles-towards-colorectal-hct116-and-lung-cancer-a549-cell-lines
#7
Sai Kumar Tammina, Badal Kumar Mandal, Shivendu Ranjan, Nandita Dasgupta
Different sized tetragonal tin oxide nanoparticles (SnO2 NPs) were synthesized using Piper nigrum seed extract at three different calcination temperatures (300, 500, 900°C) and these nanoparticles (NPs) were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), dynamic light scattering (DLS) and Fourier transform infrared spectrophotometry (FT-IR). The optical properties were studied using UV-Vis and photoluminescence (PL) spectrophotometers. The generation of reactive oxygen species (ROS) was monitored by using a fluorescence spectrophotometer and fluorescence microscope...
November 25, 2016: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/27915027/tonotopic-representation-of-loudness-in-the-human-cortex
#8
Andrew Thwaites, Josef Schlittenlacher, Ian Nimmo-Smith, William D Marslen-Wilson, Brian C J Moore
A prominent feature of the auditory system is that neurons show tuning to audio frequency; each neuron has a characteristic frequency (CF) to which it is most sensitive. Furthermore, there is an orderly mapping of CF to position, which is called tonotopic organization and which is observed at many levels of the auditory system. In a previous study (Thwaites et al., 2016) we examined cortical entrainment to two auditory transforms predicted by a model of loudness, instantaneous loudness and short-term loudness, using speech as the input signal...
November 30, 2016: Hearing Research
https://www.readbyqxmd.com/read/27914336/thermoresponsive-supramolecular-micellar-drug-delivery-system-based-on-star-linear-pseudo-block-polymer-consisting-of-%C3%AE-cyclodextrin-poly-n-isopropylacrylamide-and-adamantyl-poly-ethylene-glycol
#9
Xia Song, Jing-Ling Zhu, Yuting Wen, Feng Zhao, Zhong-Xing Zhang, Jun Li
Chemotherapy is facing several limitations such as low water solubility of anticancer drugs and multidrug resistance (MDR) in cancer cells. To overcome these limitations, a thermoresponsive micellar drug delivery system formed by a non-covalently connected supramolecular block polymer was developed. The system is based on the host-guest interaction between a well-defined β-cyclodextrin (β-CD) based poly(N-isopropylacrylamide) star host polymer and an adamantyl-containing poly(ethylene glycol) (Ad-PEG) guest polymer...
November 16, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27910732/binding-of-anti-cardiovascular-drug-to-serum-albumin-an-insight-in-the-light-of-spectroscopic-and-computational-approaches
#10
Tajalli Ilm Chandel, Gulam Rabbani, MohsinVahid Khan, Masihuz Zaman, Parvez Alam, Yasser Shahein, Rizwan Hasan Khan
Isoprenaline hydrochloride is a potential cardiovascular drug helps in the smooth functioning of the heart muscles. So, we have performed the binding study of ISO with BSA. This study was investigated by UV absorption, fluorescence, synchronous fluorescence, circular dichroism etc. The analysis of intrinsic fluorescence data showed the low binding affinity of ISO. The binding constant Kb was 2.8×103 M-1 and binding stoichiometry (n) was approximately one and the Gibb's free energy change at 310 K was determined to be -8...
December 2, 2016: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/27910726/the-effect-of-deuterium-oxide-on-the-conformational-stability-and-aggregation-of-bovine-serum-albumin
#11
Mouhamad Reslan, Veysel Kayser
Protein aggregation is a significant problem affecting the integrity of proteins, and is a major hindrance to the development of biopharmaceutical products. Deuterium Oxide (D2O), widely used in protein characterization studies, has been shown to promote protein aggregation when used as a substitute for water in most buffered protein solutions; however, a few studies have reported minor improvements in melting point temperatures for some proteins. Our study aims to investigate the effect of D2O on protein stability, using bovine serum albumin (BSA) as a model...
December 2, 2016: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/27910538/a-compact-and-versatile-dynamic-flow-cryostat-for-photon-science
#12
Peter J E M van der Linden, Marco Moretti Sala, Christian Henriquet, Matteo Rossi, Kenya Ohgushi, François Fauth, Laura Simonelli, Carlo Marini, Edmundo Fraga, Claire Murray, Jonathan Potter, Michael Krisch
We have developed a helium gas flow cryostat for use on synchrotron tender to hard X-ray beamlines. Very efficient sample cooling is achieved because the sample is placed directly in the cooling helium flow on a removable sample holder. The cryostat is compact and easy to operate; samples can be changed in less than 5 min at any temperature. The cryostat has a temperature range of 2.5-325 K with temperature stability better than 0.1 K. The very wide optical angle and the ability to operate in any orientation mean that the cryostat can easily be adapted for different X-ray techniques...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27908283/expression-of-a-fungal-manganese-peroxidase-in-escherichia-coli-a-comparison-between-the-soluble-and-refolded-enzymes
#13
Nan Wang, Kai Ren, Rong Jia, Wenting Chen, Ruirui Sun
BACKGROUND: Manganese peroxidase (MnP) from Irpex lacteus F17 has been shown to have a strong ability to degrade recalcitrant aromatic pollutants. In this study, a recombinant MnP from I. lacteus F17 was expressed in Escherichia coli Rosetta (DE3) in the form of inclusion bodies, which were refolded to achieve an active enzyme. Further, we optimized the in vitro refolding conditions to increase the recovery yield of the recombinant protein production. Additionally, we attempted to express recombinant MnP in soluble form in E...
December 1, 2016: BMC Biotechnology
https://www.readbyqxmd.com/read/27906141/green-synthesis-of-zno-nanoparticles-by-olive-olea-europaea
#14
Shahla Hashemi, Zahra Asrar, Shahram Pourseyedi, Nazi Nadernejad
Green synthesis of nanoparticles is superior to physical and chemical methods as it is environment-friendly and cost-effective. The present study was carried out for inducing nanoparticles synthesis by zinc nitrate in the leaves extracts of olive. Further leaves extracts were evaluated for antiradical scavenging activity by 1, 1-diphenyl-2-picryl-hydrazyl assay. Morphological and structural properties of the synthesised ZnO nanoparticles have been characterised using UV-Vis spectrophotometer, FTIR, TEM, XRD and dynamic light scattering (DLS) analysis...
December 2016: IET Nanobiotechnology
https://www.readbyqxmd.com/read/27903085/bio-medically-active-zinc-oxide-nanoparticles-synthesized-by-using-extremophilic-actinobacterium-streptomyces-sp-ma30-and-its-characterization
#15
Thangavel Shanmugasundaram, Ramasamy Balagurunathan
The present study describes the synthesis of zinc oxide nanoparticles (ZnO-NPs) using an extremophilic actinobacterial cell-free extract, supplied with aqueous zinc acetate solution. Crystalline nature, morphological features, and polydispersed nanoparticles size (15-30 nm) were identified by X-ray diffraction (XRD), atomic force and electron microscopic analysis with dynamic light scattering (DLS) study. The interaction between biomolecules and ZnO-NPs was analyzed using Fourier transform infra-red spectroscopy (FT-IR)...
November 30, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27890596/monoacyl-phosphatidylcholine-inhibits-the-formation-of-lipid-multilamellar-structures-during-in-vitro-lipolysis-of-self-emulsifying-drug-delivery-systems
#16
Thuy Tran, Scheyla D V S Siqueira, Heinz Amenitsch, Thomas Rades, Anette Müllertz
The colloidal structures formed during lipolysis of self-emulsifying drug delivery systems (SEDDS) might affect the solubilisation and possibly the absorption of drugs. The aim of the current study is to elucidate the structures formed during the in vitro lipolysis of four SEDDS containing medium-chain glycerides and caprylocaproyl polyoxyl-8 glycerides (Labrasol), with or without monoacyl phosphatidylcholine (MAPC). In situ synchrotron small-angle X-ray scattering (SAXS) was combined with ex situ cryogenic transmission electron microscopy (cryo-TEM) and dynamic light scattering (DLS) to elucidate the generated structures...
November 24, 2016: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27889588/preparation-and-properties-evaluation-of-a-novel-ph-sensitive-liposomes-based-on-imidazole-modified-cholesterol-derivatives
#17
Liang Ju, Fang Cailin, Wu Wenlan, Yu Pinghua, Gao Jiayu, Li Junbo
As a new kind of drug carries, pH-sensitive liposomes have been widely studied in tumor therapy for their advantages of target ability and sustained-release. Here, we synthesized a pH-sensitive material, N-(3-Aminopropyl)imidazole-cholesterol (IM-Chol) and prepared a novel pH-sensitive liposomes using IM-Chol and phosphatidylcholine. IM-Chol was synthesized through amidation reaction between the amino group of N-(3-Aminopropyl)imidazole and acyl chloride group of cholesteryl chloroformate in a weak base solution...
November 23, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27889528/tailoring-shape-and-size-of-biogenic-silver-nanoparticles-to-enhance-antimicrobial-efficacy-against-mdr-bacteria
#18
Madhuree Kumari, Shipra Pandey, Ved Prakash Giri, Arpita Bhattacharya, Richa Shukla, Aradhana Mishra, C S Nautiyal
Spherical, rectangular, penta, and hexagonal silver nanoparticles of different dimensions were biosynthesized in an eco-friendly manner by biocontrol agent, Trichoderma viride by manipulating physical parameters, pH, temperature, and reaction time. The particles were characterized by UV-vis spectroscopy; Dynamic Light Scattering (DLS), Transmission Electron Microscopy (TEM) and Fourier Transform Infra-red Spectroscopy (FTIR). Shape and size dependent antimicrobial activity of nanoparticles against human pathogens was observed...
November 23, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/27889337/characterization-and-analysis-of-binding-of-thioflavin-t-with-partially-folded-and-native-states-of-%C3%AE-lactalbumin-protein-by-calorimetric-and-spectroscopic-techniques
#19
Moumita Dasgupta, Nand Kishore
We have analysed binding of Thioflavin T (ThT) with molten globule (MG) and native (N) states of α-lactalbumin (α-LA) by using calorimetry and spectroscopy. ThT has been widely used for detection of amyloid fibrils from enhancement of its fluorescence emission intensity. Instead of the spectral changes of ThT, we, rather, monitored the changes occurring in the spectral properties of the MG and N states upon interaction with ThT, from fluorescence, absorbance and circular dichroism (CD) spectroscopy. Our novel and most important observation is non-fluorescent mode of binding of ThT to the MG state of α-LA suggesting that the mechanism of binding is distinctly different from that of association with the protein fibrils...
November 23, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27886514/sugar-based-novel-niosomal-nanocarrier-system-for-enhanced-oral-bioavailability-of-levofloxacin
#20
Muhammad Imran, Muhammad Raza Shah, Farhat Ullah, Shafi Ullah, Abdelbary M A Elhissi, Waqas Nawaz, Farid Ahmad, Abdul Sadiq, Imdad Ali
CONTEXT: Vesicular systems have attracted great attention in drug delivery because of their amphiphilicity, biodegradability, non-toxicity and potential for increasing drug bioavailability. OBJECTIVE: A novel sugar-based double-tailed surfactant containing renewable block was synthesized for preparing niosomal vesicles that could be exploited for Levofloxacin encapsulation, aiming to increase its oral bioavailability. MATERIALS AND METHODS: The surfactant was characterized by (1)H NMR, mass spectroscopy and Fourier transform infrared spectroscopy (FT-IR)...
November 2016: Drug Delivery
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