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https://www.readbyqxmd.com/read/29782306/urticarial-lesions-in-a-pregnant-woman
#1
Sergio Santos-Alarcón, Cesar Benavente-Villegas, Isabel García-Briz, Magdalena Moneva-Léniz, Celia Sanchis-Sánchez, Almudena Mateu-Puchades
Dear Editor, Gestational pemphigoid (GP) is a rare autoimmune bullous dermatosis in pregnancy. GP usually occurs during the second or third month of pregnancy. It clinically manifests as the development of either early-onset urticarial lesions or late-onset subepidermal blisters that may linger for weeks or even months. Herein we report the case of a 45-year-old woman with the distinctive clinical onset of GP. A forty-five-year-old woman, gravida I, para 0, at 27 weeks gestation, was referred for evaluation to our Department with an extensive pruritic eruption that had developed over the previous 7 days...
April 2018: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/29778960/rapid-colorimetric-detection-of-p53-protein-function-using-dna-gold-nanoconjugates-with-applications-for-drug-discovery-and-cancer-diagnostics
#2
Enock Assah, Walter Goh, Xin Ting Zheng, Ting Xiang Lim, Jun Li, David Lane, Farid Ghadessy, Yen Nee Tan
The tumor suppressor protein p53 plays a central role in preventing cancer through interaction with DNA response elements (REs) to regulate target gene expression in cells. Due to its significance in cancer biology, relentless efforts have been directed toward understanding p53-DNA interactions for the development of cancer therapeutics and diagnostics. In this paper, we report a rapid, label-free and versatile colorimetric assay to detect wildtype p53 DNA-binding function in complex solutions. The assay design is based on a concept that alters interparticle-distances between RE-AuNPs from a crosslinking effect induced through tetramerization of wildtype p53 protein (p53-WT) upon binding to canonical DNA motifs modified on gold nanoparticles (RE-AuNPs)...
May 5, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29778929/anxiety-sensitivity-in-the-association-between-posttraumatic-stress-and-substance-use-disorders-a-systematic-review
#3
REVIEW
Anka A Vujanovic, Samantha G Farris, Brooke A Bartlett, Robert C Lyons, Moira Haller, Peter J Colvonen, Sonya B Norman
Posttraumatic stress disorder (PTSD) and substance use disorders (SUD) are complex psychiatric conditions that commonly co-occur. No evidence-based, "gold standard" treatments for PTSD/SUD comorbidity are currently available. Thus, it is imperative to better understand cognitive-affective mechanisms, targetable via cognitive-behavioral intervention (i.e., malleable), that may be related to both disorders in order to improve the theory and treatment of PTSD/SUD. Anxiety sensitivity is a malleable cognitive-affective factor with relevance to both PTSD and SUD...
May 17, 2018: Clinical Psychology Review
https://www.readbyqxmd.com/read/29774063/dual-target-gene-therapy-to-eml4-alk-nsclc-by-a-gold-nanoshell-based-system
#4
Siwen Li, Yuxi Liu, Yalan Rui, Liping Tang, Samuel Achilefu, Yueqing Gu
Although EML4-ALK transforming fusion gene is represented in only 8% of non-small cell lung cancer (NSCLC) cases, its expression is partly responsive for the failure of current NSCLC treatments. Preventing secondary mutation of the ALK protein through direct gene manipulation could overcome NSCLC drug resistance. Method: In this study, we developed a gold nanoshell (HAuNs) drug carrier for delivery and selective photo-thermal release of genes that target ALK and microRNA-301 in NSCLC. Additionally, the densely-coated nanoshell adsorbed high amounts of the positively-charged anticancer drug doxorubicin (DOX), generating an exciting multidimensional treatment strategy that includes gene-, thermal- and chemo- therapy...
2018: Theranostics
https://www.readbyqxmd.com/read/29772665/investigating-the-role-of-gold-nanoparticle-shape-and-size-in-their-toxicities-to-fungi
#5
Kangze Liu, Zhonglei He, Hugh J Byrne, James F Curtin, Furong Tian
Gold nanoparticles (GNPs) are increasingly being used in a wide range of applications, and such they are being released in greater quantities into the environment. Consequently, the environmental effects of GNPs, especially toxicities to living organisms, have drawn great attention. However, their toxicological characteristics still remain unclear. Fungi, as the decomposers of the ecosystem, interact directly with the environment and critically control the overall health of the biosphere. Thus, their sensitivity to GNP toxicity is particularly important...
May 16, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29771521/gold-iii-catalyzed-selective-cyclization-of-alkynyl-quinazolinone-tethered-pyrroles-synthesis-of-fused-quinazolinone-scaffolds
#6
Lin-Su Wei, Guo-Xue He, Xiang-Fei Kong, Cheng-Xue Pan, Dong-Liang Mo, Gui-Fa Su
A series of 1,2- and 2,3-fused quinazolinones have been synthesized in good to excellent yields through gold-catalyzed selective hydroarylations of alkynyl quinazolinone-tethered pyrroles. The studies revealed that 1,2-fused quinazolinones were obtained through a 1,3-rearrangement and sequential 6-exo-trig cyclization of N1-alkynyl quinazolinone-tethered pyrroles while N3-alkynyl quinazolinone-tethered pyrroles went through 6-exo-dig or 7-endo-dig cyclizations directly to afford 2,3-fused quinazolinones. The fused quinazolinones could be prepared at gram scale in three steps from commercial ortho-aminobenzamide...
May 17, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29768849/atomistic-structural-variation-via-electromigration-in-molten-state-gold-nanocontacts
#7
Yasuchika Suzuki, Tokushi Kizuka
The atomistic structural variation in gold nanocontacts (NCs) due to applied voltage pulses was examined inside a transmission electron microscope. This examination was accompanied by simultaneous conductance measurements. The NCs melted during the passage of 4 ns long voltage pulses, with voltages in the 0.75-1.30 V range. Electromigration occurred in the molten state, and was directed from the positively-biased electrode to the negatively-biased electrode, which opposes the observed direction convention of most solid state metals...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29768505/multi-site-evaluation-of-the-ln34-pan-lyssavirus-real-time-rt-pcr-assay-for-post-mortem-rabies-diagnostics
#8
Crystal M Gigante, Lisa Dettinger, James W Powell, Melanie Seiders, Rene Edgar Condori Condori, Richard Griesser, Kenneth Okogi, Maria Carlos, Kendra Pesko, Mike Breckenridge, Edson Michael M Simon, Maria Yna Joyce V Chu, April D Davis, Scott J Brunt, Lillian Orciari, Pamela Yager, William C Carson, Claire Hartloge, Jeremiah T Saliki, Susan Sanchez, Mojgan Deldari, Kristina Hsieh, Ashutosh Wadhwa, Kimberly Wilkins, Veronica Yung Peredo, Patricia Rabideau, Nina Gruhn, Rolain Cadet, Shrikrishna Isloor, Sujith S Nath, Tomy Joseph, Jinxin Gao, Ryan Wallace, Mary Reynolds, Victoria A Olson, Yu Li
Rabies is a fatal zoonotic disease that requires fast, accurate diagnosis to prevent disease in an exposed individual. The current gold standard for post-mortem diagnosis of human and animal rabies is the direct fluorescent antibody (DFA) test. While the DFA test has proven sensitive and reliable, it requires high quality antibody conjugates, a skilled technician, a fluorescence microscope and diagnostic specimen of sufficient quality. The LN34 pan-lyssavirus real-time RT-PCR assay represents a strong candidate for rabies post-mortem diagnostics due to its ability to detect RNA across the diverse Lyssavirus genus, its high sensitivity, its potential for use with deteriorated tissues, and its simple, easy to implement design...
2018: PloS One
https://www.readbyqxmd.com/read/29767529/fractal-gold-nanoframework-for-highly-stretchable-transparent-strain-insensitive-conductors
#9
My Duyen Ho, Yiyi Liu, Dashen Dong, Yunmeng Zhao, Wenlong Cheng
Percolation networks of one-dimensional (1D) building blocks (e.g., metallic nanowires or carbon nanotubes) represent the mainstream strategy to fabricate stretchable conductors. One of the inherent limitations is the control over junction resistance between 1D building blocks in natural and strained states of conductors. Herein, we report highly stretchable transparent strain-insensitive conductors using fractal gold (F-Au) nanoframework based on a one-pot templateless wet chemistry synthesis method. The monolayered F-Au nanoframework (∼20 nm in thickness) can be obtained from the one-pot synthesis without any purification steps involved and can be transferred directly to arbitrary substrates like polyethylene terephthalate, food-wrap, polydimethylsiloxane (PDMS), and ecoflex...
May 16, 2018: Nano Letters
https://www.readbyqxmd.com/read/29766196/gold-catalyzed-c5-alkylation-of-indolines-and-sequential-oxidative-aromatization-access-to-c5-functionalized-indoles
#10
Wenzheng Zhang, Guangyang Xu, Lin Qiu, Jiangtao Sun
A novel protocol for the synthesis of C5-alkylated indole derivatives via a gold-catalyzed reaction of indolines with diazo compounds and subsequent oxidative aromatization has been developed. C-H bond functionalization selectively occurs at the C5-position of indolines without a directing group. The experimental operation is simple and the whole process can be manipulated in one-pot.
May 16, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29764492/mineral-trioxide-aggregate-affects-cell-viability-and-induces-apoptosis-of-stem-cells-from-human-exfoliated-deciduous-teeth
#11
Chia-Ling Tsai, Mu-Chan Ke, Yi-Hao Chen, Hsi-Kung Kuo, Hun-Ju Yu, Chueh-Tan Chen, Ya-Chi Tseng, Pei-Chin Chuang, Pei-Chang Wu
BACKGROUND: Mineral trioxide aggregate (MTA) is widely used for pulp-capping procedures in permanent teeth and as a gold standard material in endodontics. The aim of the study was to investigate the effect of MTA on cell viability and apoptosis when MTA is directly in contact with Stem Cells from Human Exfoliated Deciduous Teeth (SHEDs). METHODS: MTA was mixed and coated in the bottom of a 24-well plate. SHEDs collected and cultured from normal exfoliated human deciduous teeth (passages 3-4) were seeded on square cover glasses...
May 15, 2018: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29763339/the-v-shaped-distal-triceps-tendon-repair-a-comparative-biomechanical-analysis
#12
Bastian Scheiderer, Florian B Imhoff, Daichi Morikawa, Lucca Lacheta, Elifho Obopilwe, Mark P Cote, Andreas B Imhoff, Augustus D Mazzocca, Sebastian Siebenlist
BACKGROUND: Restoring footprint anatomy, minimizing gap formation, and maximizing the strength of distal triceps tendon repairs are essential factors for a successful healing process and return to sport. HYPOTHESIS: The novel V-shaped distal triceps tendon repair technique with unicortical button fixation closely restores footprint anatomy, provides minimal gap formation and high ultimate failure load, and minimizes iatrogenic fracture risk in acute/subacute distal triceps tendon tears...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29761626/photo-induced-polymerization-and-reconfigurable-assembly-of-multifunctional-ferrocene-tyrosine
#13
Xuejiao Yang, Yuefei Wang, Wei Qi, Jiaxing Zhang, Liwei Zhang, Renliang Huang, Rongxin Su, Zhimin He
The photo-induced reconfigurable assembly of nanostructures via the simultaneous noncovalent and covalent polymerization of a functional ferrocene-tyrosine (Fc-Y) molecule is reported. The Fc-Y monomers can directly self-assemble into nanospheres with a smooth surface driven by noncovalent interactions. By covalent photo-crosslinking of the Fc-Y monomers, the nanospheres transform spontaneously into hollow vesicles composed of hierarchically ordered lamellar structures. It is worth noting that the formed nanostructures exhibit both reducing property for in situ mineralization of gold nanoparticles with tunable biocatalytic behavior, and the redox activity for superior energy storage capacity...
May 14, 2018: Small
https://www.readbyqxmd.com/read/29759827/subcutaneous-versus-transvenous-implantable-defibrillator-therapy-a-meta-analysis-of-case-control-studies
#14
Indranill Basu-Ray, Jing Liu, Xiaoming Jia, Michael Gold, Kenneth Ellenbogen, James DiNicolantonio, András Komócsi, András Vorobcsuk, Jitae Kim, Hamid Afshar, Wilson Lam, Nilesh Mathuria, Mehdi Razavi, Abdi Rasekh, Mohammad Saeed
OBJECTIVES: This study aims to conduct a meta-analysis comparing efficacy and safety outcomes between subcutaneous implantable cardioverter-defibrillator (S-ICD) and transvenous implantable cardioverter-defibrillator (TV-ICD). BACKGROUND: The S-ICD was developed to minimize complications related to the conventional TV-ICD. Direct comparison of clinical outcomes between the 2 devices has been limited by varying patient characteristics and definitions of complications with no randomized trials completed comparing these systems...
December 26, 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29758374/age-and-alzheimer-s-pathology-disrupt-default-mode-network-functioning-via-alterations-in-white-matter-microstructure-but-not-hyperintensities
#15
Christopher A Brown, Yang Jiang, Charles D Smith, Brian T Gold
The default mode network (DMN) comprises defined brain regions contributing to internally-directed thought processes. Reductions in task-induced deactivation in the DMN have been associated with increasing age and poorer executive task performance, but factors underlying these functional changes remain unclear. We investigated contributions of white matter (WM) microstructure, WM hyperintensities (WMH) and Alzheimer's pathology to age-related alterations in DMN function. Thirty-five cognitively normal older adults and 29 younger adults underwent working memory task fMRI and diffusion tensor imaging...
April 19, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29756761/digital-microarrays-single-molecule-readout-with-interferometric-detection-of-plasmonic-nanorod-labels
#16
Derin Sevenler, George G Daaboul, Fulya Ekiz Kanik, Nese Lortlar Ünlü, M Selim Ünlu
DNA and protein microarrays are a high-throughput technology that allow the simultaneous quantification of tens of thousands of different biomolecular species. The mediocre sensitivity and limited dynamic range of traditional fluorescence microarrays compared to other detection techniques have been the technology's Achilles' Heel, and prevented their adoption for many biomedical and clinical diagnostic applications. Previous work to enhance the sensitivity of microarray readout to the single-molecule ('digital') regime have either required signal amplifying chemistry or sacrificed throughput, nixing the platform's primary advantages...
May 14, 2018: ACS Nano
https://www.readbyqxmd.com/read/29756234/inhaling-xenon-ameliorates-l-dopa-induced-dyskinesia-in-experimental-parkinsonism
#17
Jérôme Baufreton, Tomislav Milekovic, Qin Li, Steve McGuire, Eduardo Martin Moraud, Grégory Porras, Shiqi Sun, Wai Kin D Ko, Marine Chazalon, Stéphanie Morin, Elisabeth Normand, Géraldine Farjot, Aude Milet, Jan Pype, Elsa Pioli, Gregoire Courtine, Baptiste Bessière, Erwan Bezard
Parkinson's disease motor symptoms are treated with levodopa, but long-term treatment leads to disabling dyskinesia. Altered synaptic transmission and maladaptive plasticity of corticostriatal glutamatergic projections play a critical role in the pathophysiology of dyskinesia. Because the noble gas xenon inhibits excitatory glutamatergic signaling, primarily through allosteric antagonism of the N-methyl-d-aspartate receptors, we aimed to test its putative antidyskinetic capabilities. We first studied the direct effect of xenon gas exposure on corticostriatal plasticity in a murine model of levodopa-induced dyskinesia We then studied the impact of xenon inhalation on behavioral dyskinetic manifestations in the gold-standard rat and primate models of PD and levodopa-induced dyskinesia...
May 14, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29752079/gemcitabine-loaded-gold-nanospheres-mediated-by-albumin-for-enhanced-anti-tumor-activity-combining-with-ct-imaging
#18
Zhiming Wang, Lina Chen, Zhongyun Chu, Chusen Huang, Yuankui Huang, Nengqin Jia
Currently, the development of a more effective therapy approach overcoming the resistance to chemotherapy for lung cancer still faces great challenges and requires further investigation. Herein, we fabricated gemcitabine (Gem) loaded gold nanospheres mediated by bovine serum albumin (Au@BSA) for the efficient delivery of therapeutic agents into the human pulmonary carcinoma cells (A549) and simultaneous computed tomography (CT) imaging. These nanoparticles (Au@BSA) with an approximate diameter of 10 nm were single crystals and prepared through a protein-directed facile one-pot synthesis via the reduction of chloroauric acid (HAuCl4 ) utilizing bovine serum albumin (BSA) as the stabilizer...
August 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29750870/in-situ-identification-of-nanoparticle-structural-information-using-optical-microscopy
#19
Kayla S B Culver, Tingting Liu, Alexander J Hryn, Ning Fang, Teri W Odom
Diffraction-limited optical microscopy lacks the resolution to characterize directly nanoscale features of single nanoparticles. This paper describes how surprisingly rich structural features of small gold nanostars can be identified using differential interference contrast (DIC) microscopy. First, we established a library of structure-property relationships between nanoparticle shape and DIC optical image and then validated the correlation with electrodynamic simulations and electron microscopy. We found that DIC image patterns of single nanostars could be differentiated between 2D and 3D geometries...
May 11, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29746124/stereoelectronic-effects-on-the-binding-of-neutral-lewis-bases-to-cdse-nanocrystals
#20
Nicholas C Anderson, Peter E Chen, Aya K Buckley, Jonathan De Roo, Jonathan S Owen
Using 31P nuclear magnetic resonance (NMR) spectroscopy, we monitor the competition between tri-n-butylphosphine (Bu3P) and various amine and phosphine ligands for the surface of chloride terminated CdSe nanocrystals. Distinct 31P NMR signals for free and bound phosphine ligands allow their surface coverages to be directly measured. Ligands with a small steric profile achieve higher surface coverages (Bu3P = 0.5 nm-2, Me2P-n-octyl = 2.0 nm-2, NH2Bu = > 3 nm-2) and have greater relative binding affinity (Krel) for the nanocrystal (Krel: Me3P > Me2P-n-octyl ~ Me2P-n-octadecyl > Et3P > Bu3P)...
May 10, 2018: Journal of the American Chemical Society
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