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https://www.readbyqxmd.com/read/29040874/surface-functionalized-exosomes-as-targeted-drug-delivery-vehicles-for-cerebral-ischemia-therapy
#1
Tian Tian, Hui-Xin Zhang, Chun-Peng He, Song Fan, Yan-Liang Zhu, Cui Qi, Ning-Ping Huang, Zhong-Dang Xiao, Zu-Hong Lu, Bakhos A Tannous, Jun Gao
The safe and effective delivery of drugs is a major obstacle in the treatment of ischemic stroke. Exosomes hold great promise as an endogenous drug delivery nanosystem for the treatment of cerebral ischemia given their unique properties, including low immunogenicity, innate stability, high delivery efficiency, and ability to cross the blood-brain barrier (BBB). However, exosome insufficient targeting capability limits their clinical applications. In this study, the c(RGDyK) peptide has been conjugated to the exosome surface by an easy, rapid, and bio-orthogonal chemistry...
October 4, 2017: Biomaterials
https://www.readbyqxmd.com/read/29040836/surface-modified-plga-nanoparticles-with-chitosan-for-oral-delivery-of-tolbutamide
#2
Yongli Shi, Jintao Xue, Liyun Jia, Qian Du, Jie Niu, Dongyang Zhang
The main purpose of present study was to develop novel chitosan-modified polylactic-co-glycolicacid nanoparticles (CS@PLGA NPs) for improving the bio-availability of tolbutamide (TOL). The TOL-loaded CS@PLGA NPs (TOL-CS@PLGA NPs) were fabricated with the solvent evaporation method. The cargo-free CS@PLGA NPs showed a diameter of 228.3±2.5nm monitored with a laser light particlesizer, and the transmission electron microscope (TEM) photographs revealed their "core-shell" structures. The Zeta potential of the original PLGA NPs and the cargo-free CS@PLGA NPs was measured to be -20...
October 12, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29040593/oral-exposure-to-paraquat-triggers-earlier-expression-of-phosphorylated-%C3%AE-synuclein-in-the-enteric-nervous-system-of-a53t-mutant-human-%C3%AE-synuclein-transgenic-mice
#3
Nicolas Naudet, Emilie Antier, Damien Gaillard, Eric Morignat, Latifa Lakhdar, Thierry Baron, Anna Bencsik
The misfolded α-synuclein protein, phosphorylated at serine 129 (pSer129 α-syn), is the hallmark of Parkinson disease (PD). Detected also in the enteric nervous system (ENS), it supports the recent theory that PD could start in the gut, rather than the brain. In a previous study, using a transgenic mouse model of human synucleinopathies expressing the A53T mutant α-synuclein (TgM83), in which a neurodegenerative process associated with α-synuclein occurs spontaneously in the brain, we have shown earlier onset of pSer129 α-syn in the ENS...
October 12, 2017: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29040587/does-low-to-moderate-environmental-exposure-to-noise-and-air-pollution-influence-preterm-delivery-in-medium-sized-cities
#4
Marie Barba-Vasseur, Nadine Bernard, Sophie Pujol, Paul Sagot, Didier Riethmuller, Gérard Thiriez, Hélène Houot, Jérôme Defrance, Anne-Sophie Mariet, Vinh-Phuc Luu, Alice Barbier, Eric Benzenine, Catherine Quantin, Frédéric Mauny
Background: Preterm birth (PB) is an important predictor of childhood morbidity and educational performance. Beyond the known risk factors, environmental factors, such as air pollution and noise, have been implicated in PB. In urban areas, these pollutants coexist. Very few studies have examined the effects of multi-exposure on the pregnancy duration. The objective of this study was to analyse the relationship between PB and environmental chronic multi-exposure to noise and air pollution in medium-sized cities...
July 14, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/29040331/primary-care-models-for-treating-opioid-use-disorders-what-actually-works-a-systematic-review
#5
Pooja Lagisetty, Katarzyna Klasa, Christopher Bush, Michele Heisler, Vineet Chopra, Amy Bohnert
BACKGROUND: Primary care-based models for Medication-Assisted Treatment (MAT) have been shown to reduce mortality for Opioid Use Disorder (OUD) and have equivalent efficacy to MAT in specialty substance treatment facilities. OBJECTIVE: The objective of this study is to systematically analyze current evidence-based, primary care OUD MAT interventions and identify program structures and processes associated with improved patient outcomes in order to guide future policy and implementation in primary care settings...
2017: PloS One
https://www.readbyqxmd.com/read/29040321/co-delivery-of-micronized-urinary-bladder-matrix-damps-regenerative-capacity-of-minced-muscle-grafts-in-the-treatment-of-volumetric-muscle-loss-injuries
#6
Stephen M Goldman, Benjamin T Corona
Minced muscle grafts (MG) promote de novo muscle fiber regeneration and neuromuscular strength recovery in small and large animal models of volumetric muscle loss. The most noteworthy limitation of this approach is its reliance on a finite supply of donor tissue. To address this shortcoming, this study sought to evaluate micronized acellular urinary bladder matrix (UBM) as a scaffolding to promote in vivo expansion of this MG therapy in a rat model. Rats received volumetric muscle loss injuries to the tibialis anterior muscle of their left hind limb which were either left untreated or repaired with minced muscle graft at dosages of 50% and 100% of the defect mass, urinary bladder matrix in isolation, or a with an expansion product consisting of a combination of the two putative therapies in which the minced graft is delivered at a dosage of 50% of the defect mass...
2017: PloS One
https://www.readbyqxmd.com/read/29040127/double-row-arthroscopic-rotator-cuff-repair-is-more-cost-effective-than-single-row-repair
#7
Adrian L Huang, Kednapa Thavorn, Sasha van Katwyk, Peter MacDonald, Peter Lapner
BACKGROUND: The optimal technique for arthroscopic rotator cuff repair is controversial, and both single and double-row techniques are commonly used. In the current era of increasing costs, health-care delivery models are focusing on the value of care. In this study, we compared the cost-effectiveness of single-row and double-row reconstructions in patients undergoing arthroscopic rotator cuff repair. METHODS: A cost-utility analysis was performed from the perspective of a publicly funded health-care system...
October 18, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29039926/zebrafish-a-visual-model-to-evaluate-the-biofate-of-transferrin-receptor-targeted-7peptide-decorated-coumarin-6-micelles
#8
Ye Li, Xiaoning Song, Xiang Yi, Ruibing Wang, Simon Ming-Yuen Lee, Xueqing Wang, Ying Zheng
In the present study, the zebrafish was explored as an in vivo model to assess the biofate of transferrin receptor (TfR)-targeted coumarin 6 (C6) micelles across various biological barriers. Three 7peptide (7pep)-decorated poly-(ethylene glycol)-block-poly (ε-caprolactone) (PEG-b-PCL) micelles loaded with fluorescence coumarin 6 (7pep-M-C6) with different ligand densities were constructed with particle sizes between 30-40 nm. Whole-mount immunostaining revealed that the expression level of TfR in the retina, brain and intestine increased along with development stage...
October 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29039912/3d-printed-paper-spray-ionization-cartridge-with-integrated-desolvation-feature-and-ion-optics
#9
G Ij Salentijn, R D Oleschuk, E Verpoorte
In this work we present the application of 3D-printing for the miniaturization and functionalization of an ion source for (portable) mass spectrometry (MS). Two versions of a 3D-printed cartridge for paper spray ionization (PSI) are demonstrated, assessed, and compared. We first focus on the use of 3D-printing to enable the integration of an embedded electrostatic lens and a manifold for internal sheath gas distribution and delivery. Cartridges with and without a sheath gas manifold and an electrostatic lens are compared with respect to analytical performance and operational flexibility...
October 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29039909/indocyanine-green-holo-transferrin-nanoassemblies-for-tumor-targeted-dual-modal-imaging-and-photothermal-therapy-of-glioma
#10
Mingting Zhu, Zonghai Sheng, Yali Jia, Dehong Hu, Xin Liu, Xianyuan Xia, Chengbo Liu, Pan Wang, Xiaobing Wang, Hairong Zheng
Active-targeted cancer imaging and therapy of glioma has attracted much attention in theranostic nanomedicine. As a promising tumor-targeting ligand, holo-transferrin (holo-Tf) has been applied for enhancing delivery of nanotheranostics. However, holo-Tf-based nanoassemblies for active targeting mediated multi-modal imaging and therapeutics have not been previously reported. Here, we develop a one-step method for the preparation of holo-Tf-indocyanine green (holo-Tf-ICG) nanoassemblies for fluorescence (FL) and photoacoustic (PA) dual-modal imaging and photothermal therapy (PTT) of glioma...
October 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29036723/converting-from-transdermal-to-buccal-formulations-of-buprenorphine-a-pharmacokinetic-meta-model-simulation-in-healthy-volunteers
#11
Tony Priestley, Arvind K Chappa, Diane R Mould, Richard N Upton, Neil Shusterman, Steven Passik, Vicente J Tormo, Stephen Camper
OBJECTIVE:  To develop a model to predict buprenorphine plasma concentrations during transition from transdermal to buccal administration. DESIGN:  Population pharmacokinetic model-based meta-analysis of published data. METHODS:  A model-based meta-analysis of available buprenorphine pharmacokinetic data in healthy adults, extracted as aggregate (mean) data from published literature, was performed to explore potential conversion from transdermal to buccal buprenorphine...
September 29, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/29036503/implementing-electronic-health-records-ehrs-health-care-provider-perceptions-before-and-after-transition-from-a-local-basic-ehr-to-a-commercial-comprehensive-ehr
#12
Marie Krousel-Wood, Allison B McCoy, Chad Ahia, Elizabeth W Holt, Donnalee N Trapani, Qingyang Luo, Eboni G Price-Haywood, Eric J Thomas, Dean F Sittig, Richard V Milani
Objective: We assessed changes in the percentage of providers with positive perceptions of electronic health record (EHR) benefit before and after transition from a local basic to a commercial comprehensive EHR. Methods: Changes in the percentage of providers with positive perceptions of EHR benefit were captured via a survey of academic health care providers before (baseline) and at 6-12 months (short term) and 12-24 months (long term) after the transition. We analyzed 32 items for the overall group and by practice setting, provider age, and specialty using separate multivariable-adjusted random effects logistic regression models...
September 23, 2017: Journal of the American Medical Informatics Association: JAMIA
https://www.readbyqxmd.com/read/29035825/effect-of-a-combination-of-mometasone-furoate-levofloxacin-and-retinyl-palmitate-with-an-in-situ-gel-forming-nasal-delivery-system-on-nasal-mucosa-damage-repair-in-an-experimental-rabbit-model
#13
Fadlullah Aksoy, Remzi Dogan, Orhan Ozturan, Ebru Altuntas, Fatma Gülgün Yener, Gulactı Topcu, Beril Guler
BACKGROUND: In this study a combination of Mometasone Furoate (MF)+Levofloxacin hemihydrate (LH)+Retinyl palmitate (RP) with an in situ gel-forming delivery system was evaluated at different stages of nasal mucosal damage repair in a rabbit maxillary sinus model. METHODS: In this study, 28 rabbits were included and assigned randomly to four groups. In all rabbits, a standard ostium was opened in the medial wall of the maxillary sinus by using a drill. Two different subsequently prepared gels with an in situ gel-forming delivery system were used...
October 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29035818/skin-penetrating-polymeric-nanoparticles-incorporated-in-silk-fibroin-hydrogel-for-topical-delivery-of-curcumin-to-improve-its-therapeutic-effect-on-psoriasis-mouse-model
#14
Kai-Li Mao, Zi-Liang Fan, Jian-Dong Yuan, Pian-Pian Chen, Jing-Jing Yang, Jie Xu, De-Li ZhuGe, Bing-Hui Jin, Qun-Yan Zhu, Bi-Xin Shen, Yasin Sohawon, Ying-Zheng Zhao, He-Lin Xu
A poor percutaneous penetration capability for most topical anti-inflammatory drugs is one of the main causes compromising their therapeutic effects on psoriatic skin. Even though curcumin has shown a remarkable efficacy in the treatment of psoriasis, its effective penetration through the stratum corneum is still a major challenge during transdermal delivery. The aim of our study was to design skin-permeating nanoparticles (NPs) to facilitate delivery of curcumin to the deeper layers of the skin. A novel amphiphilic polymer, RRR-α-tocopheryl succinate-grafted-ε-polylysine conjugate (VES-g-ε-PLL) was synthesized and self-assembled into polymeric nanoparticles...
October 10, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29035747/studies-on-the-adsorption-and-desorption-of-mitoxantrone-to-lauric-acid-albumin-coated-iron-oxide-nanoparticles
#15
Jan Zaloga, Artem Feoktystov, Vasil M Garamus, Weronika Karawacka, Alexander Ioffe, Thomas Brückel, Rainer Tietze, Christoph Alexiou, Stefan Lyer
A rational use of superparamagnetic iron oxide nanoparticles (SPIONs) in drug delivery, diagnostics, and other biomedical applications requires deep understanding of the molecular drug adsorption/desorption mechanisms for proper design of new pharmaceutical formulations. The adsorption and desorption of the cytostatic Mitoxantrone (MTO) to lauric acid-albumin hybrid coated particles SPIONs (SEON(LA-HSA)) was studied by Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), surface titration, release experiments and small-angle neutron and X-ray scattering...
September 28, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29035746/the-exploration-of-endocytic-mechanisms-of-pla-peg-nanoparticles-prepared-by-coaxialtri-capillary-electrospray-template-removal-method
#16
Jiaming Chen, Lihua Cao, Yuecheng Cui, Kehua Tu, Hongjun Wang, Li-Qun Wang
The nano-sized poly(lactic acid)-poly(ethylene glycol) (PLA-PEG) particles with core-shell structure were efficiently prepared by using coaxial tri-capillary electrospray-template removal method. The cellular uptake mechanism, intracellular distribution and exocytosis in A549 cell model of electrosprayed PLA-PEG nanoparticles were systemically studied. The drug release behavior of electrosprayed PLA-PEG nanoparticles were also investigated. Our results showed that PLA-PEG nanoparticles can be endocytosed quickly by A549 cells...
October 2, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29035646/electronic-health-record-portals-adoption-empirical-model-based-on-utaut2
#17
Jorge Tavares, Amélia Goulão, Tiago Oliveira
BACKGROUND: The future of healthcare delivery is becoming more citizen centered, as today's user is more active and better informed. Governmental institutions are promoting the deployment and use of online services such as Electronic Health Record (EHR) portals. This makes the adoption of EHR portals an important field to study and understand. OBJECTIVE: The aim of this study is to understand the factors that drive individuals to adopt EHR portals. METHODS: This study applies the extended unified theory of acceptance and usage technology (UTAUT2) to explain patients' individual adoption of EHR portals...
October 16, 2017: Informatics for Health & Social Care
https://www.readbyqxmd.com/read/29035502/binding-mechanism-of-model-charged-dye-carboxyfluorescein-to-hyaluronan-polylysine-multilayers
#18
Vladimir Z Prokopovic, Anna S Vikulina, David Sustr, Elena M Shchukina, Dmitry G Shchukin, Dmitry V Volodkin
Biopolymer-based multilayers become more and more attractive due to the vast span of biological application they can be used for, e.g. implant coatings, cell culture supports, scaffolds. Multilayers have demonstrated superior capability to store enormous amount of small charged molecules such as drugs and release them in a controlled manner, however, the binding mechanism for drug loading into the multilayers is still poorly understood. Here we focus on this mechanism using model hyaluronan/polylysine (HA/PLL) multilayers and a model charged dye carboxyfluorescein (CF)...
October 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29035347/modeling-the-energy-performance-of-lorawan
#19
Lluís Casals, Bernat Mir, Rafael Vidal, Carles Gomez
LoRaWAN is a flagship Low-Power Wide Area Network (LPWAN) technology that has highly attracted much attention from the community in recent years. Many LoRaWAN end-devices, such as sensors or actuators, are expected not to be powered by the electricity grid; therefore, it is crucial to investigate the energy consumption of LoRaWAN. However, published works have only focused on this topic to a limited extent. In this paper, we present analytical models that allow the characterization of LoRaWAN end-device current consumption, lifetime and energy cost of data delivery...
October 16, 2017: Sensors
https://www.readbyqxmd.com/read/29035283/mtorc1-stimulates-phosphatidylcholine-synthesis-to-promote-triglyceride-secretion
#20
William J Quinn, Min Wan, Swapnil V Shewale, Rebecca Gelfer, Daniel J Rader, Morris J Birnbaum, Paul M Titchenell
Liver triacylglycerol (TAG) synthesis and secretion are closely linked to nutrient availability. After a meal, hepatic TAG formation from fatty acids is decreased, largely due to a reduction in circulating free fatty acids (FFA). Despite the postprandial decrease in FFA-driven esterification and oxidation, VLDL-TAG secretion is maintained to support peripheral lipid delivery and metabolism. The regulatory mechanisms underlying the postprandial control of VLDL-TAG secretion remain unclear. Here, we demonstrated that the mTOR complex 1 (mTORC1) is essential for this sustained VLDL-TAG secretion and lipid homeostasis...
October 16, 2017: Journal of Clinical Investigation
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