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https://www.readbyqxmd.com/read/29334092/synthetic-cells-produce-a-quorum-sensing-chemical-signal-perceived-by-pseudomonas-aeruginosa
#1
Giordano Rampioni, Francesca D'Angelo, Marco Messina, Alessandro Zennaro, Yutetsu Kuruma, Daniela Tofani, Livia Leoni, Pasquale Stano
Recent developments in bottom-up synthetic biology (e.g., lipid vesicle technology integrated with cell-free protein expression systems) allow the generation of semi-synthetic minimal cells (in short, synthetic cells, SCs) endowed with some distinctive capacities of natural cells. In particular, such approaches provide technological tools and conceptual frameworks for the design and engineering of programmable SCs capable of communicating with natural cells by exchanging chemical signals. Here we describe the generation of giant vesicle-based SCs which, via gene expression, synthesize in their aqueous lumen an enzyme that in turn produces a chemical signal...
January 15, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29333854/cucurbit-8-uril-based-giant-supramolecular-vesicles-highly-stable-versatile-carriers-for-photoresponsive-and-targeted-drug-delivery
#2
Cuihua Hu, Ningning Ma, Fei Li, Yu Fang, Yao Liu, Linlu Zhao, Shanpeng Qiao, Xiumei Li, Xiaojia Jiang, Tiezhu Li, Fangzhong Shen, Yibing Huang, Quan Luo, Junqiu Liu
Highly stable giant supramolecular vesicles were constructed by hierarchical self-assembly of cucurbit[8]uril (CB[8])-based supra-amphiphiles for photoresponsive and targeted intracellular drug delivery. These smart vesicles can encapsulate the model drugs with high loading efficiencies, and then release them by manipulating photoswitchable CB[8] heteroternary complexation to regulate the formation and dissociation of supra-amphiphiles that cause dramatic morphological changes of the assemblies to achieve remote optically-controlled drug delivery...
January 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29325512/an-industry-update-the-latest-developments-in-therapeutic-delivery
#3
Oliver C Steinbach
The present industry update covers the period 1 October-31 October 2017, with information sourced from company press releases, regulatory and patent agencies as well as scientific literature. While the corporate news in October was traditionally dominated by the announcement of the third quarter results, with most of them showing market and revenue growth but also an increasing number of initial public offerings after years of slower financial development, we also saw trends continuing toward an increasing number of convergences of drugs with nanotechnology, devices and 21st century information technology...
February 2018: Therapeutic Delivery
https://www.readbyqxmd.com/read/29318515/a-review-of-methods-for-monitoring-adverse-events-in-pediatric-psychopharmacology-clinical-trials
#4
REVIEW
Margaret Coates, Marina Spanos, Pooja Parmar, Tara Chandrasekhar, Linmarie Sikich
Pediatric psychotropic prescription rates are rising, emphasizing the need for careful monitoring of drug safety in this population. Currently, no standardized assessments are used in clinical trials for adverse event (AE) elicitation focused on long-term drug treatment in pediatric patients. Despite a lack of standardized AE elicitation methods in psychiatric clinical trials, it is clear that psychiatric medications have developmentally dependent AEs that differ from those observed in adults. In this review, we discuss the use of general inquiry elicitation, drug-specific checklists, and systematic elicitation scales for AE reporting in pediatric psychopharmacology trials...
January 9, 2018: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/29316735/the-2018-nucleic-acids-research-database-issue-and-the-online-molecular-biology-database-collection
#5
Daniel J Rigden, Xosé M Fernández
The 2018 Nucleic Acids Research Database Issue contains 181 papers spanning molecular biology. Among them, 82 are new and 84 are updates describing resources that appeared in the Issue previously. The remaining 15 cover databases most recently published elsewhere. Databases in the area of nucleic acids include 3DIV for visualisation of data on genome 3D structure and RNArchitecture, a hierarchical classification of RNA families. Protein databases include the established SMART, ELM and MEROPS while GPCRdb and the newcomer STCRDab cover families of biomedical interest...
January 4, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29298380/red-blood-cells-as-smart-delivery-systems
#6
Xiao Han, Chao Wang, Zhuang Liu
Red blood cells (RBCs), also called erythrocytes are the most abundant type of blood cells. Recently, RBCs have been extensively studied as drug delivery systems for their remarkable properties, including inherent bio-compatibility, low immunogenicity, flexibility and long systemic circulation. Over the years, a number of different RBC-based drug delivery systems including genetically engineered RBCs, non-genetically engineered RBCs, as well as RBC membrane coated nanoparticles have been explored, aiming at diverse biomedical applications...
January 3, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29295927/novel-concept-of-the-smart-nir-light-controlled-drug-release-of-black-phosphorus-nanostructure-for-cancer-therapy
#7
Meng Qiu, Dou Wang, Weiyuan Liang, Liping Liu, Yin Zhang, Xing Chen, David Kipkemoi Sang, Chenyang Xing, Zhongjun Li, Biqin Dong, Feng Xing, Dianyuan Fan, Shiyun Bao, Han Zhang, Yihai Cao
A biodegradable drug delivery system (DDS) is one the most promising therapeutic strategies for cancer therapy. Here, we propose a unique concept of light activation of black phosphorus (BP) at hydrogel nanostructures for cancer therapy. A photosensitizer converts light into heat that softens and melts drug-loaded hydrogel-based nanostructures. Drug release rates can be accurately controlled by light intensity, exposure duration, BP concentration, and hydrogel composition. Owing to sufficiently deep penetration of near-infrared (NIR) light through tissues, our BP-based system shows high therapeutic efficacy for treatment of s...
January 2, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29291503/smart-release-of-doxorubicin-loaded-on-polyetheretherketone-peek-surface-with-3d-porous-structure
#8
Liping Ouyang, Zhenjie Sun, Donghui Wang, Yuqin Qiao, Hongqin Zhu, Xiaohan Ma, Xuanyong Liu
It is important to fabricate an implant possessing environment sensitive drug delivery. In this work, the construction of 3D porous structure on polyetheretherketone (PEEK) surface and pH sensitive polymer, chitosan, was introduced. The smart release of doxorubicin can be realized on the 3D porous surface of PEEK loading chitosan. We give a feasible explanation for the effect of chitosan on smart drug release according to Henderson-Hasselbalch equation. Furthermore, the intracellular drug content of the cell cultured on the samples with highest chitosan is significantly higher at pH 4...
December 26, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29288823/high-resolution-3d-microscopy-study-of-cardiomyocytes-on-polymer-scaffold-nanofibers-reveals-formation-of-unusual-sheathed-structure
#9
Victor Balashov, Anton Efimov, Olga Agapova, Alexander Pogorelov, Igor Agapov, Konstantin Agladze
Building functional and robust scaffolds for engineered biological tissue requires a nanoscale mechanistic understanding of how cells use the scaffold for their growth and development. A vast majority of the scaffolds used for cardiac tissue engineering are based on polymer materials, the matrices of nanofibers. Attempts to load the polymer fibers of the scaffold with additional sophisticated features, such as electrical conductivity and controlled release of the growth factors or other biologically active molecules, as well as trying to match the mechanical features of the scaffold to those of the extracellular matrix, cannot be efficient without a detailed knowledge of how the cells are attached and strategically positioned with respect to the scaffold nanofibers at micro and nanolevel...
December 27, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29287664/a-sequential-multiple-assignment-randomized-trial-for-cocaine-cessation-and-relapse-prevention-tailoring-treatment-to-the-individual
#10
Joy M Schmitz, Angela L Stotts, Anka Vujanovic, Michael Weaver, Jin Yoon, Jessica Vincent, Charles Green
Drug addiction is a chronic, devastating, but treatable disorder. A core principle of drug addiction treatment states that no single treatment is appropriate for everyone (NIDA, 2012); treatments need to adjust based on patient characteristics and response in order to be maximally effective. For cocaine use disorders (CUD), specifically, the most potent intervention currently available for initiating abstinence is behavior therapy using contingency management (CM) procedures, with early cessation being a robust predictor of future abstinence...
December 26, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/29287145/chaperonin-groel-as-a-smart-hydrophobic-drug-delivery-and-tumor-targeting-molecular-machine-for-tumor-therapy
#11
Yi Yuan, Chong Du, Cuiji Sun, Jin Zhu, Shan Wu, Yinlong Zhang, Tianjiao Ji, Jianlin Lei, Yinmo Yang, Ning Gao, Guangjun Nie
The targeted delivery of hydrophobic therapeutic drugs to tumors is one of the major challenges in drug development. The use of natural proteins as drug delivery vehicles holds great promise due to various functionalities of proteins. In the current study, we exploited a natural protein, GroEL, which possesses a double layer cage structure, as a hydrophobic drug container, which is switchable by ATP binding to a hydrophilic status, to design a novel and intelligent hydrophobic drug delivery molecular machine with a controlled drug release profile...
December 29, 2017: Nano Letters
https://www.readbyqxmd.com/read/29285401/multifunctional-stimuli-responsive-polymer-gated-iron-and-gold-embedded-silica-nano-golf-balls-nanoshuttles-for-targeted-on-demand-theranostics
#12
Liping Wang, Grace Jang, Deependra Kumar Ban, Vrinda Sant, Jay Seth, Sami Kazmi, Nirav Patel, Qingqing Yang, Joon Lee, Woraphong Janetanakit, Shanshan Wang, Brian P Head, Gennadi Glinsky, Ratneshwar Lal
Multi-functional nanoshuttles for remotely targeted and on-demand delivery of therapeutic molecules and imaging to defined tissues and organs hold great potentials in personalized medicine, including precise early diagnosis, efficient prevention and therapy without toxicity. Yet, in spite of 25 years of research, there are still no such shuttles available. To this end, we have designed magnetic and gold nanoparticles (NP)-embedded silica nanoshuttles (MGNSs) with nanopores on their surface. Fluorescently labeled Doxorubicin (DOX), a cancer drug, was loaded in the MGNSs as a payload...
2017: Bone Research
https://www.readbyqxmd.com/read/29278801/smart-ph-sensitive-micelles-based-on-redox-degradable-polymers-as-dox-gnps-carriers-for-controlled-drug-release-and-ct-imaging
#13
Di Xiong, Xiaofang Zhang, Shiyuan Peng, Huawei Gu, Lijuan Zhang
An amphiphilic copolymer poly(ε-caprolactone)-ss-poly(2-(dimethylamino) ethyl methacrylate), PCL-SS-PDMAEMA, was designed and synthesized using ROP and ARGET ATRP methods. Dual stimulus responsive micelles were prepared by the self-assembly of PCL-SS-PDMAEMA. PDMAEMA could respond to acid conditions with protonation, followed by enhanced hydrophilicity and swelling of the micellar shell. In addition, the cleavable joint disulfide bond between the core and shell was disrupted when exposed to an abundance of the reductant reductive glutathione GSH, leading to the disassembly of the micellar structure...
December 8, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29275247/light-sensitive-dextran-covered-pnba-nanoparticles-as-triggered-drug-delivery-systems-formulation-characteristics-and-cytotoxicity
#14
Meriem El Founi, Soliman Mehawed Abdellatif Soliman, Régis Vanderesse, Samir Acherar, Emmanuel Guedon, Isabelle Chevalot, Jérôme Babin, Jean-Luc Six
HYPOTHESIS: For some years, smart nano-objects are one of the main focuses of current research. In the framework of polymeric nanomedicine, o-nitrobenzyl alcohol derivatives lead to light-responsive polymeric materials. At this day, nanomedicine based on polysaccharide/poly(o-nitrobenzyl acrylate) (PNBA) copolymers have never been reported. EXPERIMENTS: For the first time, PNBA core/dextran shell nanoparticles (NPs) were formulated by evaluating two different processes: (i) nanoprecipitation of preformed Dextran-g-PNBA glycopolymers, (ii) emulsion/evaporation using azido-functionalized PNBA and alkynated dextran, carrying out (or not) an interfacial click chemistry reaction...
December 14, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29260563/smart-nanoparticles-undergo-phase-transition-for-enhanced-cellular-uptake-and-subsequent-intracellular-drug-release-in-tumor-microenvironment
#15
Guihua Ye, Yajun Jiang, Xiaoying Yang, Hongxiang Hu, Beibei Wang, Lu Sun, Victor C Yang, Duxin Sun, Wei Gao
The inefficient cellular uptake and intracellular drug release at tumor site are two major obstacles limiting the antitumor efficacy of nanoparticle delivery systems. To overcome both problems, we designed a smart nanoparticles undergo phase transition in tumor microenvironment. The smart nanoparticles are generated using a lipid-polypetide hybrid nanoparticle, which comprises a PEGylated lipid monolayer shell and a pH sensitive hydrophobic poly-L-histidine (PHIS) core, and is loaded with antitumor drug doxorubicin (DOX)...
December 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29241087/development-of-a-fast-hplc-dad-method-for-simultaneous-quantitation-of-three-immunosuppressant-drugs-in-whole-blood-samples-using-intelligent-chemometrics-resolving-of-coeluting-peaks-in-the-presence-of-blood-interferences
#16
Maryam Vosough, Sadaf Mosleh Tehrani
The present study describes a fast high performance liquid chromatography-diode array detection analytical methodology for quantification of tacrolimus, everolimus and cyclosporine A in whole blood samples, with minimum sample preparation steps. A short isocratic chromatographic elution was coupled with second-order calibration using multivariate curve resolution to stablish a smart and green methodology. Due to presence of matrix effect, a sample-added calibration strategy was used for quantification purposes...
December 9, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29239136/composite-polymer-colloids-for-sers-based-applications
#17
REVIEW
Malte S Strozyk, Dorleta Jimenez de Aberasturi, Luis M Liz-Marzán
Polymers and nanoparticles can be combined into different materials with applications in various fields like catalysis, biotechnology, or drug delivery, to cite just a few. Colloidal composites may vary significantly, ranging from a single nanoparticle stabilized by a polymer shell through a polymeric carrier decorated with hundreds of particles. We review here composite colloids comprising gold nanoparticles, with an emphasis in systems with potential application in surface enhanced Raman scattering (SERS)...
December 14, 2017: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29220150/functionalized-eu-iii-based-nanoscale-metal-organic-framework-to-achieve-near-ir-triggered-and-targeted-two-photon-absorption-photodynamic-therapy
#18
Jianguo Jia, Yang Zhang, Min Zheng, Changfu Shan, Huicheng Yan, Wenyu Wu, Xuan Gao, Bo Cheng, Weisheng Liu, Yu Tang
The postsynthetic-modified nanoscale metal-organic framework (NMOF) probes selected as potential drug delivery platforms and photodynamic therapy agents to fulfill the effective and safe treatment of neoplastic diseases have attracted increasing attention recently. Herein, a Eu(III)-based NMOF probe elaborately postsynthetically modified with a β-diketonate two-photon-absorbing (TPA) ligand is rationally designed and further functionalized by assembling the photosensitizer molecule (methylene blue, MB) in the pores and a cyclic peptide targeting motif on the surface of the NMOF, which could achieve highly efficient near-infrared (NIR)-triggered and -targeted photodynamic therapy (PDT)...
December 8, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29218857/the-combined-effect-of-thermal-and-chemotherapy-on-hela-cells-using-magnetically-actuated-smart-textured-fibrous-system
#19
Pranav Tiwari, Sakshi Agarwal, Sachchidanand Srivastava, Shilpee Jain
Thermal therapy combined with chemotherapy is one of the advanced and efficient methods to eradicate cancer. In this work, we fabricated magnetically actuated smart textured (MAST) fibrous systems and studied their candidacy for cancer treatment. The polycaprolactone-Fe3 O4 based MAST fibers were fabricated using electrospinning technique. These MAST fibrous systems contained carbogenic quantum dots as a tracking agent and doxorubicin hydrochloride anticancer drug. Additionally, as fabricated MAST fibrous systems were able to deliver anticancer drug and heat energy simultaneously to kill HeLa cells in a 10 min period in vitro...
January 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29216759/pharmaceutical-potential-of-quantum-dots
#20
Swati Jha, Prateek Mathur, Suman Ramteke, Narendra Kumar Jain
Quantum dots (QDs) or fluorescent nanocrystals are designed nanoparticles that are promising for several biological and bio-medical applications as well as drug delivery and simultaneous cellular imaging. QD's have exhibited promising potential primarily in receptor based targeting as a result of their distinctive physicochemical properties. Functionalized QDs (f-QDs) have been developed as effective, safe, nano-sized smart systems to deliver a wide range of bio-actives. Surface modified fluorescent carbon QDs with surface modification have attracted attention as targeting ligand to accomplish cellular targeting with enhanced specificity...
December 7, 2017: Artificial Cells, Nanomedicine, and Biotechnology
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