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https://www.readbyqxmd.com/read/29778981/walking-the-line-the-fate-of-nanomaterials-at-biological-barriers
#1
REVIEW
Huan Meng, Wei Leong, Kam W Leong, Chunying Chen, Yuliang Zhao
Biological systems have developed an efficient multi-tiered defense system to block foreign substances such as engineered nanomaterials (NMs) from causing damage. In a pathological scenario, the disease itself may also pose additional barriers due to the imbalance between abnormal cells and their surrounding microenvironment, and NMs could behave similarly or differently to classic foreign substances, depending on their unique characteristics. Thus, understanding the mechanisms that govern the fate of NMs against these biological barriers, including the strategies that can be used to shift their fate between access and blockage, become key information for NMs design...
May 5, 2018: Biomaterials
https://www.readbyqxmd.com/read/29775619/proteomic-approach-to-profiling-immune-complex-antigens-in-cerebrospinal-fluid-samples-from-patients-with-central-nervous-system-autoimmune-diseases
#2
Nozomi Aibara, Kunihiro Ichinose, Miyako Baba, Hideki Nakajima, Katsuya Satoh, Ryuichiro Atarashi, Naoya Kishikawa, Noriyuki Nishida, Atsushi Kawakami, Naotaka Kuroda, Kaname Ohyama
BACKGROUND: Immune complexes (ICs) may clearly reflect immunological abnormalities caused by disease, especially for autoimmune diseases. Although ICs have been detected in cerebrospinal fluid (CSF) from patients with CNS autoimmune diseases, identities of antigens in such ICs have not been comprehensively determined. METHODS: We used immune complexome analysis, in which nano-liquid chromatography-tandem mass spectrometry is employed to comprehensively identify antigens incorporated into ICs in biological fluids, to characterize ICs in CSF samples from patients with CNS autoimmune diseases, and to find disease-specific IC antigen to a certain CNS autoimmune disease...
May 15, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29775184/colloidal-transport-through-trap-arrays-controlled-by-active-microswimmers
#3
Wen Yang, Vyacheslav R Misko, Fabio Marchesoni, Franco Nori
We investigate the dynamics of a binary mixture consisting of active and passive colloidal particles diffusing in a two-dimensional
 array of truncated harmonic wells, or traps. We explore the possibility of using a small fraction of active particles to manipulate a much larger fraction of passive particles, for instance, to confine them in or extract them from the traps. The results of our study have potential application in biology and medical sciences, for example, to remove dead cells or undesired contaminants from biological systems by means of self-propelled nano-robots...
May 18, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29774971/3d-dna-origami-crystals
#4
Tao Zhang, Caroline Hartl, Kilian Frank, Amelie Heuer-Jungemann, Stefan Fischer, Philipp C Nickels, Bert Nickel, Tim Liedl
3D crystals assembled entirely from DNA provide a route to design materials on a molecular level and to arrange guest particles in predefined lattices. This requires design schemes that provide high rigidity and sufficiently large open guest space. A DNA-origami-based "tensegrity triangle" structure that assembles into a 3D rhombohedral crystalline lattice with an open structure in which 90% of the volume is empty space is presented here. Site-specific placement of gold nanoparticles within the lattice demonstrates that these crystals are spacious enough to efficiently host 20 nm particles in a cavity size of 1...
May 18, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29774506/therapeutic-potential-of-mesenchymal-stem-cell-derived-exosomes-in-the-treatment-of-eye-diseases
#5
C Randall Harrell, Bojana Simovic Markovic, Crissy Fellabaum, Aleksandar Arsenijevic, Valentin Djonov, Nebojsa Arsenijevic, Vladislav Volarevic
Mesenchymal stem cells (MSCs) were, due to their immunomodulatory and pro-angiogenic characteristics, extensively explored as new therapeutic agents in cell-based therapy of uveitis, glaucoma, retinal and ocular surface diseases.Since it was recently revealed that exosomes play an important role in biological functions of MSCs, herewith we summarized current knowledge about the morphology, structure, phenotype and functional characteristics of MSC-derived exosomes emphasizing their therapeutic potential in the treatment of eye diseases...
May 18, 2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29773195/measuring-zinc-in-biological-nanovesicles-by-multiple-analytical-approaches
#6
Francesco Piacenza, Antje Biesemeier, Marco Farina, Francesco Piva, Xin Jin, Eleonora Pavoni, Lorenzo Nisi, Maurizio Cardelli, Laura Costarelli, Robertina Giacconi, Andrea Basso, Elisa Pierpaoli, Mauro Provinciali, James C M Hwang, Antonio Morini, Andrea di Donato, Marco Malavolta
Exosomes are nanovesicles known to mediate intercellular communication. Although it is established that zinc ions can act as intracellular signaling factors, the measurement of zinc in circulating nanovesicles has not yet been attempted. Providing evidence of the existence of this zinc fraction and methods for its measurement might be important to advance our knowledge of zinc status and its relevance in diseases. Exosomes from 0.5 ml of either fresh or frozen human plasma were isolated by differential centrifugation...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29772391/development-of-ionic-liquid-assisted-synthesized-nano%C3%A2-silver-combined-with-vascular-endothelial-growth-factor-as-wound-healing-in-the-care-of-femoral-fracture-in-the-children-after-surgery
#7
Xingli Li, Maohua Liu, Hongxia Cheng, Qun Wang, Chuanna Miao, Shumei Ju, Fang Liu
This investigation aimed to develop the silver (Ag) nanoparticles incorporated vascular endothelial growth factor (VEGF) for the improvement wound healing and reduce Aseptic necrosis in treatment of femoral fracture healing. The spherical shaped Ag nanoparticles with improved morphology have been effectively synthesized via microwave assisted method using ionic liquids 1-dodecyl-3-methylimidazolium chloride. The morphological structure and crystalline properties of Ag nanoparticles are analyzed by using UV, XRD and TEM-EDX analytical methods...
March 6, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29770699/lysine-succinylation-and-acetylation-in-pseudomonas-aeruginosa
#8
Charlotte Gaviard, Isabelle Broutin, Pascal Cosette, Emmanuelle De, Thierry Jouenne, Julie Hardouin
Pseudomonas aeruginosa is a Multi-Drug Resistant human opportunistic pathogen largely involved in nosocomial infections. Unfortunately, effective antibacterial agents lacked. Explore its physiology at the post-translational modifications (PTMs) level may contribute to the renewal of combat tactics. Recently, lysine succinylation was discovered in bacteria and seems to be an interesting PTM. Here, we present the first succinylome and acetylome of P. aeruginosa PA14 cultured in the presence of 4 different carbon sources, using a two-dimensional immunoaffinity approach coupled with nano-liquid chromatograpy tandem mass spectrometry...
May 17, 2018: Journal of Proteome Research
https://www.readbyqxmd.com/read/29768997/recent-advances-on-glioblastoma-multiforme-and-nano-drug-carriers-a-review
#9
Wang Liao, Shengnuo Fan, Yuqiu Zheng, Shaowei Liao, Ying Xiong, Yi Li, Jun Liu
Glioblastoma multiforme (GBM) is the most frequent glioma with a poor prognosis. The mainstay treatment for GBM is chemotherapy, but the average survival of GBM remains unsatisfactory due to therapeutic resistance. Poor permeability restricted by the blood brain barrier (BBB) and the presence of glioblastoma stem cells (GSCs) remain as two problems for chemotherapy. Recently, nanocarriers have attracted much attention in the research of GBM, owing to their advantages in self-assembly, biosafety, release controllability, and BBB penetrability, making them promising candidates for GBM treatment...
May 13, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29768903/preparation-and-biological-applications-of-graphene-oxide-functionalized-water-based-magnetic-fluids
#10
Zuocheng Dai, Yan Huang, Huan Yang, Pingping Yao, Yuxiang Yang, Chaoying Ni
Magnetic fluids (MFs) with good dispersion were prepared by speed-controlled co-precipitation method, using polyethylene glycol (PEG-4000) as dispersing agent. To functionalize the MFs with graphene oxide (GO), highly dispersed nano-magnetic particles (NMPs) were firstly prepared by low-temperature freeze-drying technique. 3-aminopropyltriethoxysilane (APTES) was then attached on the surface of NMPs to form amino functionalized NMPs. GO was finally assembled with amino functionalized NMPs, to prepare GO functionalized MFs (GO-NMPs) by electrostatic adsorption...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29768885/introduction-of-a-novel-nano-sized-n-sulfonated-br%C3%A3-nsted-acidic-homogeneous-catalyst-for-the-promotion-of-the-synthesis-of-2-h-indazolo-2-1-b-phthalazine-1-6-11-13-h-triones
#11
Omid Goli-Jolodar, Farhad Shirini, Mohadeseh Seddighi
In this research work, 4,4'-(butane-1,4-diyl)bis(1-sulfo-1,4-diazabicyclo[2.2.2]octane-1,4-diium) tetrachloride (NS-C4(DABCO-SO3H)2 · 4Cl) as a new nano-sized N-sulfonic acid was prepared and characterized using different types of spectroscopic methods including FT-IR, 1H NMR, 13C NMR, XRD, TGA and SEM analysis. This new reagent was efficiently used as catalyst for the promotion of the one-pot synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11(13H)-triones derivatives, as a class of biologically active compounds with important pharmaceutical properties, under solvent-free conditions during short reaction times in high yields...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29768873/macrophages-as-nanocarriers-for-drug-delivery-novel-therapeutics-for-central-nervous-system-diseases
#12
Zeng-Pan-Pan Ye, Xiao-Lin Ai, Andrew M Faramand, Fang Fang
Many central nervous system (CNS) diseases were thought to be untreatable due to the presence of the blood-brain barrier (BBB). The chemokine gradients secreted from CNS parenchyma can induce macrophage migration to the brain, induce firm adherence to the endothelium of BBB, and eventually to enter the brain parenchyma. Macrophages migrating into CNS can promote neuron regeneration, induce inflammation and angiogenesis. These properties can potentially allow macrophages to act as carriers for drug/nano formulations across the BBB, and reach the potential target sites...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29767501/enhanced-antimicrobial-activity-and-structural-transitions-of-a-nanofibrillated-cellulose-nisin-bio-composite-suspension
#13
Ramon Weishaupt, Lukas Heuberger, Gilberto Siqueira, Beatrice Gutt, Tanja Zimmermann, Katharina Maniura-Weber, Stefan Salentinig, Greta Faccio
The occurrence of resistance to antibiotics has posed a high demand for novel strategies to fight bacterial infections. Antimicrobial peptides (AMPs) are a promising alternative to con-ventional antibiotics. However, their poor solubility in water and sensitivity to degradation has limited their application. Here we report the design of a smart, pH-responsive antimicro-bial nanobiocomposite material based on the AMP nisin and oxidized nanofibrillated cellulose (TONFC). Morphological transformations of the nano-scale structure of nisin functionalized TONFC fibrils were discovered at pH values between pH 5...
May 16, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29767291/bioengineered-scaffolds-for-stem-cell-applications-in-tissue-engineering-and-regenerative-medicine
#14
Maryam Rahmati, Cristian Pablo Pennisi, Ali Mobasheri, Masoud Mozafari
Stem cell-based therapies, harnessing the ability of stem cells to regenerate damaged or diseased tissues, are under wide-ranging consideration for regenerative medicine applications. However, limitations concerning poor cell persistence and engraftment upon cell transplantation still remain. During the recent years, several types of biomaterials have been investigated to control the fate of the transplanted stem cells, aiming to increase their therapeutic efficiency. In the present chapter we focus on the general properties of some of these biomaterials, which include polymers, ceramics, and nano-biomaterials...
May 17, 2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29766801/naringenin-and-its-nano-formulations-for-fatty-liver-cellular-modes-of-action-and-clinical-perspective
#15
Mahdi Zobeiri, Tarun Belwal, Fatemeh Parvizi, Rozita Naseri, Mohammad Hosein Farzaei, Seyed Fazel Nabavi, Antoni Sureda, Seyed Mohammad Nabavi
BACKGROUND: Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease mainly caused by high fat diets and sudden feed changes, vitamin and energy deficiency, and inflammatory processes. Fatty liver leads to cirrhosis, hepatocellular carcinoma as well as liver failure. Lifestyle-modifying such as weight loss and healthy diet have an inverse correlation with the risk of fatty liver. The promising effect of a diet rich in vegetables and fruits against fatty liver has been evidenced by several empirical studies focused on flavonoids...
May 14, 2018: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/29766424/effect-of-titanium-dioxide-nanoparticles-on-the-accumulation-and-distribution-of-arsenate-in-daphnia-magna-in-the-presence-of-an-algal-food
#16
Zhuanxi Luo, Mengting Li, Zhenhong Wang, Jinli Li, Jianhua Guo, Ricki R Rosenfeldt, Frank Seitz, Changzhou Yan
The impact of titanium dioxide nanoparticles (nano-TiO2 ) on the bioavailability of metals in aquatic filter-feeding organisms has rarely been investigated, especially in the presence of algae as a food source. In this study, we quantified the accumulation and subcellular distribution of arsenate (AsV ) in Daphnia magna in the presence of nano-TiO2 and a green alga (Scenedesmus obliquus) food source. Results showed that S. obliquus significantly increased the accumulation of total arsenic (As) and titanium (Ti) in D...
May 15, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29765680/the-relationship-between-substrate-morphology-and-biological-performances-of-nano-silver-loaded-dopamine-coatings-on-titanium-surfaces
#17
Weibo Zhang, Shuang Wang, Shaohua Ge, Jialong Chen, Ping Ji
Biomedical device-associated infection (BAI) and lack of osseointegration are the main causes of implant failure. Therefore, it is imperative for implants not only to depress microbial activity and biofilm colonization but also to prompt osteoblast functions and osseointegration. As part of the coating development for implants, the interest of in vitro studies on the interaction between implant substrate morphology and the coating's biological performances is growing. In this study, by harnessing the adhesion and reactivity of bioinspired polydopamine, nano-silver was successfully anchored onto micro/nanoporous as well as smooth titanium surfaces to analyse the effect of substrate morphology on biological performances of the coatings...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29760691/extracellular-vesicle-heterogeneity-subpopulations-isolation-techniques-and-diverse-functions-in-cancer-progression
#18
REVIEW
Eduard Willms, Carlos Cabañas, Imre Mäger, Matthew J A Wood, Pieter Vader
Cells release membrane enclosed nano-sized vesicles termed extracellular vesicles (EVs) that function as mediators of intercellular communication by transferring biological information between cells. Tumor-derived EVs have emerged as important mediators in cancer development and progression, mainly through transfer of their bioactive content which can include oncoproteins, oncogenes, chemokine receptors, as well as soluble factors, transcripts of proteins and miRNAs involved in angiogenesis or inflammation...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29759210/smart-bi-metallic-perovskite-nanofibers-as-selective-and-reusable-sensors-of-nano-level-concentrations-of-non-steroidal-anti-inflammatory-drugs
#19
Mona A Mohamed, Menna M Hasan, Ibrahim H Abdullah, Ahmed M Abdellah, Ali M Yehia, Nashaat Ahmed, Walaa Abbas, Nageh K Allam
A strategy for trace-level carbon-based electrochemical sensors is investigated via exploring the interesting properties of BaNb2 O6 nanofibers (NFs). Utilizing adsorptive stripping square wave voltammetry (ASSWV), an electrochemical sensing platform was developed based on BaNb2 O6 nanofibers-modified carbon paste electrode (CPE) for the sensitive detection of lornoxicam (LOR). Different techniques were used to characterize the fabricated BaNb2 O6 perovskite NFs. The obtained data show the feasibility to electro-oxidize LOR and paracetamol (PAR) on the surface of the fabricated sensor...
August 1, 2018: Talanta
https://www.readbyqxmd.com/read/29749014/3d-hybrid-small-scale-devices
#20
REVIEW
Jayson V Pagaduan, Anil Bhatta, Lewis H Romer, David H Gracias
Interfacing nano/microscale elements with biological components in 3D contexts opens new possibilities for mimicry, bionics, and augmentation of organismically and anatomically inspired materials. Abiotic nanoscale elements such as plasmonic nanostructures, piezoelectric ribbons, and thin film semiconductor devices interact with electromagnetic fields to facilitate advanced capabilities such as communication at a distance, digital feedback loops, logic, and memory. Biological components such as proteins, polynucleotides, cells, and organs feature complex chemical synthetic networks that can regulate growth, change shape, adapt, and regenerate...
May 10, 2018: Small
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