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https://www.readbyqxmd.com/read/29786727/rational-design-of-multi-functional-gold-nanoparticles-with-controlled-biomolecule-adsorption-a-multi-method-approach-for-in-depth-characterization
#1
Isaac Ojea-Jiménez, Robin Capomaccio, Inês Osório, Dora Mehn, Giacomo Ceccone, Rohanah Hussain, Giuliano Siligardi, Pascal Colpo, François Rossi, Douglas Gilliland, Luigi Calzolai
Multi-functionalized nanoparticles are of great interest in biotechnology and biomedicine, especially for diagnostic and therapeutic purposes. However, at the moment the characterization of complex, multi-functional nanoparticles is still challenging and this hampers the development of advanced nanomaterials for biological applications. In this work, we have designed a model system consisting of gold nanoparticles functionalized with two differentially-terminated poly(ethylene oxide) ligands, providing both "stealth" properties and protein-binding capabilities to the nanoparticles...
May 22, 2018: Nanoscale
https://www.readbyqxmd.com/read/29786664/enable-2017-the-first-european-phd-and-post-doc-symposium-session-3-in-vitro-to-in-vivo-modeling-life-in-3d
#2
Gianmarco Di Mauro, Ambra Dondi, Giovanni Giangreco, Alexander Hogrebe, Elja Louer, Elisa Magistrati, Meeli Mullari, Gemma Turon, Wouter Verdurmen, Helena Xicoy Cortada, Sanja Zivanovic
The EUROPEAN ACADEMY FOR BIOMEDICAL SCIENCE (ENABLE) is an initiative funded by the European Union Horizon 2020 program involving four renowned European research institutes (Institute for Research in Biomedicine-IRB Barcelona, Spain; Radboud Institute for Molecular Life Sciences-RIMLS, the Netherlands; Novo Nordisk Foundation Center for Protein Research-NNF CPR, Denmark; European School of Molecular Medicine-SEMM, Italy) and an innovative science communication agency (Scienseed). With the aim to promote biomedical science of excellence in Europe, ENABLE organizes an annual three-day international event...
May 22, 2018: Journal of Personalized Medicine
https://www.readbyqxmd.com/read/29785107/near-infrared-light-mediated-photodynamic-photothermal-therapy-nanoplatform-by-the-assembly-of-fe-3-o-4-carbon-dots-with-graphitic-black-phosphorus-quantum-dots
#3
Ming Zhang, Wentao Wang, Yingjun Cui, Ninglin Zhou, Jian Shen
Background: Recently, combined photodynamic therapy (PDT) and photothermal therapy (PTT) has become a desired treatment for cancer. However, the development of economic, high-efficiency, and safe photosensitizers/photothermal agents remains a significant challenge. Methods: A novel nanocomposite has been developed via the assembly of iron oxide carbon dot (Fe3 O4 -CDs) nanoparticles and black phosphorus quantum dots (genipin [GP]-polyglutamic acid [PGA]-Fe3 O4 -CDs@BPQDs), and this nanocomposite shows a broad light-absorption band and a photodegradable character...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29784954/the-structural-basis-of-nanobody-unfolding-reversibility-and-thermoresistance
#4
Patrick Kunz, Katinka Zinner, Norbert Mücke, Tanja Bartoschik, Serge Muyldermans, Jörg D Hoheisel
Nanobodies represent the variable binding domain of camelid heavy-chain antibodies and are employed in a rapidly growing range of applications in biotechnology and biomedicine. Their success is based on unique properties including their reported ability to reversibly refold after heat-induced denaturation. This view, however, is contrasted by studies which involve irreversibly aggregating nanobodies, asking for a quantitative analysis that clearly defines nanobody thermoresistance and reveals the determinants of unfolding reversibility and aggregation propensity...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784711/quantitative-proteome-and-phosphoproteome-analyses-of-streptomyces-coelicolor-reveal-proteins-and-phosphoproteins-modulating-differentiation-and-secondary-metabolism
#5
Beatriz Rioseras, Pavel V Sliaha, Vladimir Gorshkov, Paula Yagüe, Maria T López-García, Nathaly González-Quiñónez, Sergey Kovalchuk, Adelina Rogowska-Wrzesinska, Ole N Jensen, Angel Manteca
Streptomycetes are multicellular bacteria with complex developmental cycles. They are of biotechnological importance as they produce most bioactive compounds used in biomedicine, e.g. antibiotic, antitumoral and immunosupressor compounds. Streptomyces genomes encode a large number of Ser/Thr/Tyr kinases, making this genus an outstanding model for the study of bacterial protein phosphorylation events. We used mass spectrometry based quantitative proteomics and phosphoproteomics to characterize bacterial differentiation and activation of secondary metabolism of Streptomyces coelicolor...
May 21, 2018: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29782309/in-memoriam-assistant-professor-kre%C3%A5-imir-kostovi%C3%A4-md-phd-16-october-1969-15-october-2017
#6
Branka Marinović
On a Sunday afternoon almost six months ago, we were deeply moved by the news that our Krešimir is no longer with us. The sad news spread from Sarajevo with the speed only most horrible and saddest news can achieve. And everybody who was reached by these news wondered whether it was possible and whether it was true. Because our professor Kostović left us a day before his 48th birthday. Krešimir Kostović was born on the 16th October 1969 in Zagreb, where he completed primary and secondary education. He enrolled at the University of Zagreb School of Medicine in 1988, and got his medical degree in 1995...
April 2018: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/29772656/correction-riedlinger-t-et-al-the-direct-and-indirect-roles-of-nf-%C3%AE%C2%BAb-in-cancer-lessons-from-oncogenic-fusion-proteins-and-knock-in-mice-biomedicines-2018-6-36
#7
Tabea Riedlinger, Jana Haas, Julia Busch, Bart van de Sluis, Michael Kracht, M Lienhard Schmitz
No abstract text is available yet for this article.
May 16, 2018: Biomedicines
https://www.readbyqxmd.com/read/29771249/-new-italian-law-about-end-of-life-self-determination-and-shared-care-pathway
#8
Rosagemma Ciliberti, Matteo Gulino, Ilaria Gorini
The Italian Parliament has recently approved the Law n. 219/2017 concerning "Rules on informed consent and advance directives". The manuscript points out the main key points of the new law, in order to clarify the role of the advance directives and to provide clear operational guidelines for healthcare personnel. Taking into consideration the Italian deontological and juridical context, along with the main jurisprudential judgements, the law has been analysed. The Authors discussed the new rules and the bioethical issues also in relation to the provisions stated by the Convention on Human Rights and Biomedicine (Convention of Oviedo)...
May 2018: Recenti Progressi in Medicina
https://www.readbyqxmd.com/read/29770893/the-biogenetical-revolution-of-the-council-of-europe-twenty-years-of-the-convention-on-human-rights-and-biomedicine-oviedo-convention
#9
REVIEW
Oktawian Nawrot
The Council of Europe's legal regulation concerning development of biology and medicine undoubtedly form the most interesting, but certainly not perfect, over-national system of protection of human beings in prenatal stages of development. The strength of the mentioned system is that it based on well-known and common acceptable values and rules such as human dignity and its protection. The aim of the paper is to present the reasons behind adopting such a system, as well as the consequences of the latter.The author argues that in such a way a revolution within the human rights system of the Council of Europe took place...
May 16, 2018: Life Sciences, Society and Policy
https://www.readbyqxmd.com/read/29770714/confirmatory-factor-analysis-of-the-causal-illness-attribution-scale-in-chinese-patients-with-multiple-somatic-symptoms
#10
Ling Zhang, Jeanine Schwarz, Maria Kleinstäuber, Kurt Fritzsche, Wiebke Hannig, Jing Wei, Jianzhong Yang, Lan Zhang
Causal illness attributions influence how individuals cope with somatic symptoms and illnesses. Dimensions of causal symptom attributions have been examined in Western cultures with the subscale 'causes' of the revised Illness Perception Questionnaire (IPQ-R). Some previous studies have identified a stronger somatic attribution style in Asian patients. In this study it was examined if the factorial structure of causal attributions identified in Western populations can be identified in a large Chinese sample of patients presenting with somatic symptoms...
January 2018: Psychology, Health & Medicine
https://www.readbyqxmd.com/read/29770690/fluorinated-dna-micelles-synthesis-and-properties
#11
Jianmei Zou, Cheng Jin, Ruowen Wang, Hailan Kuai, Lili Zhang, Xiao-Bing Zhang, Juan Li, Liping Qui, Weihong Tan
Creating new functional building blocks that expand the versatility of nanostructures depends on bottom-up self-assembly of amphiphilic biomolecules. Inspired by the unique physicochemical properties of hydrophobic perfluorocarbons, coupled with the powerful functions of nucleic acids, we herein report the synthesis of a series of diperfluorodecyl-DNA conjugates (PF-DNA) which can efficiently self-assemble into micelles in aqueous solution. Based on the micelle structure, both target binding affinity and enzymatic resistance of the DNA probe can be enhanced...
May 17, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29770369/nanomaterial-microbe-cross-talk-physicochemical-principles-and-patho-biological-consequences
#12
REVIEW
D Westmeier, A Hahlbrock, C Reinhardt, J Fröhlich-Nowoisky, S Wessler, C Vallet, U Pöschl, S K Knauer, R H Stauber
The applications of nanoparticles (NPs) are increasing exponentially in consumer products, biotechnology and biomedicine, and humans, as well as the environment, are increasingly being exposed to NPs. Analogously, various (pathogenic) microorganisms are present at all the major exposure and entry sites for NPs in the human body as well as in environmental habitats. However, the field has just started to explore the complex interplay between NPs and microbes and the (patho)biological consequences. Based on recent insights, herein, we critically reviewed the available knowledge about the interaction of NPs with microbes and the analytical investigations including the latest intravital imaging tools...
May 17, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/29765800/surface-characterization-of-nanoparticles-using-near-field-light-scattering
#13
Eunsoo Yoo, Yizhong Liu, Chukwuazam A Nwasike, Sebastian R Freeman, Brian C DiPaolo, Bernardo Cordovez, Amber L Doiron
The effect of nanoparticle surface coating characteristics on colloidal stability in solution is a critical parameter in understanding the potential applications of nanoparticles, especially in biomedicine. Here we explored the modification of the surface of poly(ethylene glycol)-coated superparamagnetic iron oxide nanoparticles (PEG-SPIOs) with the synthetic pseudotannin polygallol via interpolymer complexation (IPC). Changes in particle size and zeta potential were indirectly assessed via differences between PEG-SPIOs and IPC-SPIOs in particle velocity and scattering intensity using near-field light scattering...
2018: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/29763546/direct-structural-annotation-of-membrane-protein-aggregation-loci-using-peptide-based-reverse-mapping
#14
Muralikrishna Lella, Radhakrishnan Mahalakshmi
Membrane protein aggregation is associated with neurodegenerative diseases. Despite remarkable advances to map protein aggregation, molecular elements that drive the structural transition from functional to amyloidogenic β-sheet polymers remain elusive. Here, we report a simple and reliable reverse-mapping method to identify the molecular elements. We validate our approach by obtaining molecular details of aggregation loci of human β-barrel nanopore ion channels that are vital for cell survival. By coupling bottom-up synthesis with time-resolved aggregation kinetics and high-resolution imaging, we identify molecular elements that switch folded channels to polymeric β-rich aggregates...
May 15, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29763441/chemical-composition-of-barks-from-quercus-faginea-trees-and-characterization-of-their-lipophilic-and-polar-extracts
#15
Joana P A Ferreira, Isabel Miranda, Vicelina B Sousa, Helena Pereira
The bark from Quercus faginea mature trees from two sites was chemically characterized for the first time. The barks showed the following composition: ash 14.6%, total extractives 13.2%, suberin 2.9% and lignin 28.2%. The polysaccharides were composed mainly of glucose and xylose (50.3% and 35.1% of all monosaccharides respectively) with 4.8% of uronic acids. The suberin composition was: ω-hydroxyacids 46.3% of total compounds, ɑ,ω-alkanoic diacids 22.3%, alkanoic acids 5.9%, alkanols 6.7% and aromatics 6...
2018: PloS One
https://www.readbyqxmd.com/read/29763421/discovery-of-chitin-in-skeletons-of-non-verongiid-red-sea-demosponges
#16
Hermann Ehrlich, Lamiaa A Shaala, Diaa T A Youssef, Sonia Żółtowska-Aksamitowska, Mikhail Tsurkan, Roberta Galli, Heike Meissner, Marcin Wysokowski, Iaroslav Petrenko, Konstantin R Tabachnick, Viatcheslav N Ivanenko, Nicole Bechmann, Yvonne Joseph, Teofil Jesionowski
Marine demosponges (Porifera: Demospongiae) are recognized as first metazoans which have developed over millions of years of evolution effective survival strategies based on unique metabolic pathways to produce both biologically active secondary metabolites and biopolymer-based stiff skeletons with 3D architecture. Up to date, among marine demosponges, only representatives of the Verongiida order have been known to synthetize biologically active substances as well as skeletons made of structural polysaccharide chitin...
2018: PloS One
https://www.readbyqxmd.com/read/29754232/targeted-gene-knock-out-using-nuclease-assisted-vector-integration-hemi-and-homozygous-deletion-of-jag1
#17
Michael Gapinske, Nathan Tague, Jackson Winter, Gregory H Underhill, Pablo Perez-Pinera
Gene editing technologies are revolutionizing fields such as biomedicine and biotechnology by providing a simple means to manipulate the genetic makeup of essentially any organism. Gene editing tools function by introducing double-stranded breaks at targeted sites within the genome, which the host cells repair preferentially by Non-Homologous End Joining. While the technologies to introduce double-stranded breaks have been extensively optimized, this progress has not been matched by the development of methods to integrate heterologous DNA at the target sites or techniques to detect and isolate cells that harbor the desired modification...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29751162/recent-advances-in-dna-nanotechnology
#18
REVIEW
Pongphak Chidchob, Hanadi F Sleiman
DNA is a powerful guiding molecule to achieve the precise construction of arbitrary structures and high-resolution organization of functional materials. The combination of sequence programmability, rigidity and highly specific molecular recognition in this molecule has resulted in a wide range of exquisitely designed DNA frameworks. To date, the impressive potential of DNA nanomaterials has been demonstrated from fundamental research to technological advancements in materials science and biomedicine. This review presents a summary of some of the most recent developments in structural DNA nanotechnology regarding new assembly approaches and efforts in translating DNA nanomaterials into practical use...
May 8, 2018: Current Opinion in Chemical Biology
https://www.readbyqxmd.com/read/29749448/dextran%C3%A2-coated-superparamagnetic-iron-oxide-nanoparticles-activate-the-mapk-pathway-in-human-primary-monocyte-cells
#19
Qihong Wu, Tianyu Miao, Ting Feng, Chuan Yang, Yingkun Guo, Hong Li
With the increase in applications of superparamagnetic iron oxide nanoparticles (SPIONs) in biomedicine, it is essential to investigate the bio‑security of these nanoparticles, especially with respect to the human immune system. In the present study, the biological effects of dextran‑coated superparamagnetic iron oxide nanoparticles (Dex‑SPIONs) on human primary monocyte cells were evaluated. The results of the present study demonstrated that Dex‑SPIONs can be identified in phagosomes or freed in the cytoplasm and did not affect cell viability or induce apoptosis...
May 4, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29748744/a-review-of-cardiovascular-toxicity-of-tio-2-zno-and-ag-nanoparticles-nps
#20
REVIEW
Yi Cao, Yu Gong, Wenzhen Liao, Yunfeng Luo, Chaohua Wu, Maolin Wang, Qianyu Yang
To ensure the safe use of nanoparticles (NPs) in modern society, it is necessary and urgent to assess the potential toxicity of NPs. Cardiovascular system is required for the systemic distribution of NPs entering circulation. Therefore, the adverse cardiovascular effects of NPs have gained extensive research interests. Metal based NPs, such as TiO2 , ZnO and Ag NPs, are among the most popular NPs found in commercially available products. They may also have potential applications in biomedicine, which could increase their contact with cardiovascular systems...
May 10, 2018: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
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