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https://www.readbyqxmd.com/read/29786905/quasi-3d-structured-interfaces-by-polymer-brushes
#1
REVIEW
Edmondo M Benetti
The fabrication of polymer brushes via surface-initiated controlled radical polymerizations has progressively developed beyond a simple surface functionalization technique, enabling the design of complex polymer interfaces with a quasi-3D molecular organization. The modulation of polymer brush structure has led to an extremely broad tuning potential for technologically relevant interfacial, physicochemical properties, allowing one to precisely tune swelling, nanomechanical, and nanotribological characteristics of polymer films...
May 22, 2018: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29786885/automated-buildup-of-biomimetic-films-in-cell-culture-microplates-for-high-throughput-screening-of-cellular-behaviors
#2
Paul Machillot, Catarina Quintal, Fabien Dalonneau, Loic Hermant, Pauline Monnot, Kelsey Matthews, Vincent Fitzpatrick, Jie Liu, Isabelle Pignot-Paintrand, Catherine Picart
An automatic method is established for layer-by-layer (LbL) assembly of biomimetic coatings in cell culture microplates using a commercial liquid-handling robot. Highly homogeneous thin films are formed at the bottom of each microwell. The LbL film-coated microplates are compatible with common cellular assays, using microplate readers and automated microscopes. Cellular adhesion is screened on crosslinked and peptide-functionalized LbL films and stem cell differentiation in response to increasing doses of bone morphogenetic proteins (2, 4, 7, 9)...
May 22, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29786793/a-method-for-prostate-and-breast-cancer-cell-spheroid-cultures-using-gelatin-methacryloyl-based-hydrogels
#3
Christoph Meinert, Christina Theodoropoulos, Travis J Klein, Dietmar W Hutmacher, Daniela Loessner
Modern tissue engineering technologies have delivered tools to recreate a cell's naturally occurring niche in vitro and to investigate normal and pathological cell-cell and cell-niche interactions. Hydrogel biomaterials mimic crucial properties of native extracellular matrices, including mechanical support, cell adhesion sites and proteolytic degradability. As such, they are applied as 3D cell culture platforms to replicate tissue-like architectures observed in vivo, allowing physiologically relevant cell behaviors...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29786787/protocols-for-migration-and-invasion-studies-in-prostate-cancer
#4
Arjanneke F van de Merbel, Geertje van der Horst, Jeroen T Buijs, Gabri van der Pluijm
Prostate cancer is the most common malignancy diagnosed in men in the western world. The development of distant metastases and therapy resistance are major clinical problems in the management of prostate cancer patients. In order for prostate cancer to metastasize to distant sites in the human body, prostate cancer cells have to migrate and invade neighboring tissue. Cancer cells can acquire a migratory and invasive phenotype in several ways, including single cell and collective migration. As a requisite for migration, epithelial prostate cancer cells often need to acquire a motile, mesenchymal-like phenotype...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29786766/bacterial-dna-detected-on-pathologically-changed-heart-valves-using-16s-rrna-gene-amplification
#5
Miroslava Chalupova, Anna Skalova, Tomas Hajek, Lenka Geigerova, Dana Kralova, Pavel Liska, Hana Hecova, Jiri Molacek, Jaroslav Hrabak
Nowadays, dental diseases are one of the most common illnesses in the world. Some of them can lead to translocation of oral bacteria to the bloodstream causing intermittent bacteraemia. Therefore, a potential association between oral infection and cardiovascular diseases has been discussed in recent years as a result of adhesion of oral microbes to the heart valves. The aim of this study was to detect oral bacteria on pathologically changed heart valves not caused by infective endocarditis. In the study, patients with pathologically changed heart valves were involved...
May 22, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29786754/regulation-of-interferon-signaling-and-hcv%C3%A2-rna-replication-by-extracellular-matrix
#6
Takuya Kuwashiro, Shinji Iwane, Xia Jinghe, Sachiko Matsuhashi, Yuichiro Eguchi, Keizo Anzai, Kazuma Fujimoto, Toshihiko Mizuta, Naoya Sakamoto, Masanori Ikeda, Nobuyuki Kato, Iwata Ozaki
Although interferon (IFN)‑based treatment of patients with chronic hepatitis C virus (HCV) infection is widely applied, treatment resistance is often observed in patients with advanced liver fibrosis. Given that the molecular mechanisms of IFN resistance in liver fibrosis remain elusive, the present study investigated the effects of extracellular matrix (ECM) on IFN signaling in hepatic cells. The native HuH‑7 human hepatoma cell line and HuH‑7 cells were stably transfected with full‑length HCV‑RNA fused with Renilla luciferase (OR6 cells) were cultured on ECM‑coated dishes or non‑coated plastic dishes (NDs), and treated with human IFN‑α...
May 18, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29786707/biocompatible-alkyl-cyanoacrylates-and-their-derivatives-as-bio-adhesives
#7
REVIEW
Jay M Korde, Balasubramanian Kandasubramanian
Cyanoacrylate adhesives and their homologues have elicited interest over the past few decades owing to their applications in the biomedical sector, extending from tissue adhesives to scaffolds to implants to dental material and adhesives, because of their inherent biocompatibility and ability to polymerize solely with moisture, thanks to which they adhere to any substrate containing moisture such as the skin. The ability to tailor formulations of alkyl cyanoacrylate to form derivative compounds to meet application requirements along with their biodegradability in conjunction with their inherent biocompatibility make them highly sought after candidates in the biomedical sector...
May 22, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29786687/genome-wide-analysis-of-circular-rnas-in-bovine-cumulus-cells-treated-with-bmp15-and-gdf9
#8
Yao Fu, Hao Jiang, Jian-Bo Liu, Xu-Lei Sun, Zhe Zhang, Sheng Li, Yan Gao, Bao Yuan, Jia-Bao Zhang
Circular RNAs (circRNAs) are important members of the non-coding RNA family, and those relating to animal physiologies have been widely studied in recent years. This study aimed to explore the roles of circRNAs in the regulation of follicular development. We constructed four bovine cumulus cell cDNA libraries, including a negative control group (NC) and groups treated with BMP15, GDF9 and BMP15 + GDF9, and we sequenced the libraries on the Illumina HiSeq Xten platform. We identified 1706 circRNAs and screened for differential circRNA expression...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29786415/tailoring-crystalline-morphology-by-high-efficiency-nucleating-fiber-towards-high-performance-poly-l-lactide-biocomposites
#9
Tao Gao, Zheng-Min Zhang, Le Li, Rui-Ying Bao, Zhengying Liu, Bang-Hu Xie, Ming-Bo Yang, Wei Yang
In this work, high melting point poly(L-lactide) fiber (hPLLA fiber) with high-efficiency nucleation activity was prepared and introduced into PLLA matrix to prepare fully biodegradable PLLA biocomposites. The highly active nucleating surfaces of hPLLA fiber induced chain ordering and lamellar organization, leading to preferable formation of well-organized PLLA transcrystallinity at the surface of hPLLA fiber in quiescent conditions. The construction of such compact transcrystallinity increased the crystallinity and enhanced the interfacial adhesion, which largely promoted the heat resistance, tensile strength, and barrier property of PLLA biocomposites at a low content of hPLLA fiber...
May 22, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29786110/multi%C3%A2-layered-prevention-and-treatment-of-chronic-inflammation-organ-fibrosis-and-cancer-associated-with-canonical-wnt-%C3%AE-%C3%A2-catenin-signaling-activation-review
#10
Masaru Katoh
β‑catenin/CTNNB1 is an intracellular scaffold protein that interacts with adhesion molecules (E‑cadherin/CDH1, N‑cadherin/CDH2, VE‑cadherin/CDH5 and α‑catenins), transmembrane‑type mucins (MUC1/CD227 and MUC16/CA125), signaling regulators (APC, AXIN1, AXIN2 and NHERF1/EBP50) and epigenetic or transcriptional regulators (BCL9, BCL9L, CREBBP/CBP, EP300/p300, FOXM1, MED12, SMARCA4/BRG1 and TCF/LEF). Gain‑of‑function CTTNB1 mutations are detected in bladder cancer, colorectal cancer, gastric cancer, liver cancer, lung cancer, pancreatic cancer, prostate cancer and uterine cancer, whereas loss‑of‑function CTNNB1 mutations are also detected in human cancer...
May 17, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29786107/e3-ubiquitin-ligase-hakai-regulates-cell-growth-and-invasion-and-increases-the-chemosensitivity-to-cisplatin-in-non%C3%A2-small%C3%A2-cell-lung-cancer-cells
#11
Zi Liu, Yuqing Wu, Zijian Tao, Liang Ma
Hakai was originally identified as an E3 ubiquitin ligase of the E‑cadherin complex implicated in cell adhesion and invasion. Recently, emerging evidence has strongly suggested that Hakai serves a pivotal role in the tumorigenesis of certain tumors. However, the role of Hakai in non‑small‑cell lung cancer (NSCLC) and its underlying molecular mechanism have not been clarified. In the present study, it was observed that Hakai was highly expressed in NSCLC cell lines compared with human normal bronchial epithelial cells, and transfection with Hakai small interfering RNA significantly inhibited the growth of A549 and NCI‑H460 NSCLC cells...
May 17, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29786069/ve-cadherin-promotes-vasculogenic-mimicry-by-modulating-kaiso-dependent-gene-expression
#12
Daniel Delgado-Bellido, Mónica Fernández-Cortés, María Isabel Rodríguez, Santiago Serrano-Sáenz, Arkaitz Carracedo, Angel Garcia-Diaz, F Javier Oliver
Aberrant extra-vascular expression of VE-cadherin (VEC) has been observed in metastasis associated with vasculogenic mimicry (VM); however, the ultimate reason why non-endothelial VEC favors the acquisition of this phenotype is not established. In this study, we show that human malignant melanoma cells have a constitutively high expression of phoshoVEC (pVEC) at Y658; pVEC is a target of focal adhesion kinase (FAK) and forms a complex with p120-catenin and the transcriptional repressor kaiso in the nucleus...
May 21, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29785968/force-activatable-coating-enables-high-resolution-cellular-force-imaging-directly-on-regular-cell-culture-surfaces
#13
Anwesha Sarkar, Yuanchang Zhao, Yongliang Wang, Xuefeng Wang
Integrin-transmitted cellular forces are crucial mechanical signals regulating a vast range of cell functions. Although various methods have been developed to visualize and quantify cellular forces at the cell-matrix interface, a method with high performance and low technical barrier is still in demand. Here we developed force-activatable coating (FAC) which can be simply coated on regular cell culture apparatus's surfaces by physical adsorption, and turn these surfaces to force reporting platforms that enable cellular force mapping directly by fluorescence imaging...
May 22, 2018: Physical Biology
https://www.readbyqxmd.com/read/29785723/decreased-e-cadherin-in-mcf7-human-breast-cancer-cells-forming-multicellular-spheroids-exposed-to-simulated-microgravity
#14
Jayashree Sahana, Mohamed Zakaria Nassef, Markus Wehland, Sascha Kopp, Marcus Krüger, Thomas J Corydon, Manfred Infanger, Johann Bauer, Daniela Grimm
MCF7 human breast cancer cells were cultured under normal gravity (1g) and on a random positioning machine (RPM) preventing sedimentation. After two weeks, adherent 1g-control and adherent RPM cells (AD) as well as multicellular spheroids (MCS) were harvested. AD and MCS had been exposed to the RPM in the same culture flask. In a subsequent proteome analysis, the majority of the proteins detected showed similar label-free quantification scores (LFQ) in each of the respective subpopulations, but in both AD or MCS cultures, proteins were also found whose LFQs deviated at least twofold from their counterparts in the 1g-control cells...
May 21, 2018: Proteomics
https://www.readbyqxmd.com/read/29785490/microcirculatory-effects-of-sildenafil-in-experimental-testicular-torsion-in-rats
#15
Márton Oroszi, Andrea Szabó, Ádám Miklós Fehér, Gábor Deák, Zoltán Bajory
PURPOSE: Investigate the short-term effect of sildenafil on microcirculation, especially the velocity, the pattern of the flow and the recruitment of the leukocyte in postcapillaries. METHODS: In male Sprague-Dawley rats, the microcirculatory consequences of 60 min experimental testicular torsion, followed by 240 min of reperfusion, were examined. Using fluorescence intravital microscopy, changes in red blood cell velocity in post-capillary venules and rolling as well as adhesion of leukocytes in the postcapillary venules were examined before the torsion and every hour during the reperfusion period...
May 21, 2018: World Journal of Urology
https://www.readbyqxmd.com/read/29785481/encapsulation-of-theophylline-in-gelatin-a-pectin-complex-coacervates
#16
Nirmala Devi, Chayanika Deka, Prajnya Nath, Dilip Kumar Kakati
The present study aims at synthesizing gelatin A-pectin complex coacervates and encapsulation of theophylline in the polymer system. Variation and optimization of different reaction parameters such as pH, ratio between the polymers and cross-linker concentration was carried out to attain higher product yield. Relative viscosity, turbidity and UV-visible measurements were done for optimization. The optimum ratio between gelatin A-pectin was fixed at weight ratio 42:8 and pH=3.5. It was further observed that adhesion between the microcapsules decreased by the use of sodium carboxymethyl cellulose (SCMC) to the coacervate...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29785189/the-investigation-of-the-effect-and-mechanism-of-sophora-moorcroftiana-alkaloids-in-combination-with-albendazole-on-echinococcosis-in-an-experimental-rats-model
#17
Fabin Zhang, Chunhui Hu, Shilei Cheng, Shulin Wang, Bin Li, Deping Cao, Haining Fan, Ruchong Pan, Mei Yang, Yanhui Xu
Echinococcosis is a worldwide anthropozoonosis which is highly endemic over large animal husbandry areas in northwestern China. The current clinical therapeutic medicine against echinococcosis is albendazole, although it caused serious side effects in patients. The component in traditional Chinese herb medicine, Sophora moorcroftiana alkaloids (SA), is thought to be a potential drug to treat echinococcosis. In order to explore the effect and mechanism of SA treatment against echinococcosis, we established animal echinococcosis model and treated rats with albendazole alone, alkaloids alone, and combined therapy...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29785184/theracal-lc-from-biochemical-and-bioactive-properties-to-clinical-applications
#18
REVIEW
Naji Ziad Arandi, Tarek Rabi
Background: Direct pulp capping is a popular treatment modality among dentists. TheraCal LC is a calcium silicate-based material that is designed as a direct/indirect pulp capping material. The material might be very attractive for clinicians because of its ease of handling. Unlike other calcium silicate-based materials, TheraCal LC is resin-based and does not require any conditioning of the dentine surface. The material can be bonded with different types of adhesives directly after application...
2018: International Journal of Dentistry
https://www.readbyqxmd.com/read/29785079/decreasing-recurrent-bowel-obstructions-improving-quality-of-life-with-physiotherapy-controlled-study
#19
Amanda D Rice, Kimberley Patterson, Evette D Reed, Belinda F Wurn, Kristen Robles, Bernhard Klingenberg, Leonard B Weinstock, Janey Sa Pratt, C Richard King, Lawrence J Wurn
AIM: To compare (1) quality of life and (2) rate of recurrent small bowel obstructions (SBO) for patients treated with novel manual physiotherapy vs no treatment. METHODS: One hundred and three subjects (age 19-89) with a history of recurrent adhesive SBO were treated with a manual physiotherapy called the Clear Passage Approach (CPA) which focused on decreasing adhesive crosslinking in abdominopelvic viscera. Pre- and post-therapy data measured recurring obstructions and quality of life, using a validated test sent 90 d after therapy...
May 21, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29784862/antibodies-to-icam1-binding-pfemp1-dbl%C3%AE-are-biomarkers-of-protective-immunity-to-malaria-in-a-cohort-of-young-children-from-papua-new-guinea
#20
Sofonias K Tessema, Digjaya Utama, Olga Chesnokov, Anthony N Hodder, Clara S Lin, G L Abby Harrison, Jakob S Jespersen, Bent Petersen, Livingstone Tavul, Peter Siba, Dominic Kwiatkowski, Thomas Lavstsen, Diana S Hansen, Andrew V Oleinikov, Ivo Mueller, Alyssa E Barry
Plasmodium falciparum Erythrocyte Membrane Protein 1 (PfEMP1) mediates parasite sequestration to the cerebral microvasculature via binding of DBLβ domains to Intercellular Adhesion Molecule 1 (ICAM1) and is associated with severe cerebral malaria. In a cohort of 187 young children from Papua New Guinea (PNG), we examined baseline antibody levels to the ICAM1-binding PfEMP1 domain, DBLβ3PF11_0521 , in comparison to four control antigens including NTS-DBLα and CIDR1 domains from another group A variant and a group B/C variant...
May 21, 2018: Infection and Immunity
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