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https://www.readbyqxmd.com/read/28445987/context-dependent-mir-204-and-mir-211-affect-the-biological-properties-of-amelanotic-and-melanotic-melanoma-cells
#1
Marianna Vitiello, Andrea Tuccoli, Romina D'Aurizio, Samanta Sarti, Laura Giannecchini, Simone Lubrano, Andrea Marranci, Monica Evangelista, Silvia Peppicelli, Chiara Ippolito, Ivana Barravecchia, Elena Guzzolino, Valentina Montagnani, Michael Gowen, Elisa Mercoledi, Alberto Mercatanti, Laura Comelli, Salvatore Gurrieri, Lawrence W Wu, Omotayo Ope, Keith Flaherty, Genevieve M Boland, Marc R Hammond, Lawrence Kwong, Mario Chiariello, Barbara Stecca, Gao Zhang, Alessandra Salvetti, Debora Angeloni, Letizia Pitto, Lido Calorini, Giovanna Chiorino, Marco Pellegrini, Meenhard Herlyn, Iman Osman, Laura Poliseno
Despite increasing amounts of experimental evidence depicting the involvement of non-coding RNAs in cancer, the study of BRAFV600E-regulated genes has thus far focused mainly on protein-coding ones. Here, we identify and study the microRNAs that BRAFV600E regulates through the ERK pathway.By performing small RNA sequencing on A375 melanoma cells and a vemurafenib-resistant clone that was taken as negative control, we discover miR-204 and miR-211 as the miRNAs most induced by vemurafenib. We also demonstrate that, although belonging to the same family, these two miRNAs have distinctive features...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28445934/jarid2-is-essential-for-the-maintenance-of-tumor-initiating-cells-in-bladder-cancer
#2
Xin-Xing Zhu, Ya-Wei Yan, Chun-Zhi Ai, Shan Jiang, Shan-Shan Xu, Min Niu, Xiang-Zhen Wang, Gen-Shen Zhong, Xi-Feng Lu, Yu Xue, Shaoqi Tian, Guangyao Li, Shaojun Tang, Yi-Zhou Jiang
Bladder cancer is the most common urologic malignancy in China, with an increase of the incidence and mortality rates over past decades. Recent studies suggest that bladder tumors are maintained by a rare fraction of cells with stem cell proprieties. Targeting these bladder tumor initiating cell (TICs) population can overcome the drug-resistance of bladder cancer. However, the molecular and genetic mechanisms regulating TICs in bladder cancer remain poorly defined. Jarid2 is implicated in signaling pathways regulating cancer cell epithelial-mesenchymal transition, and stem cell maintenance...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28445927/vaccines-targeting-pres1-domain-overcome-immune-tolerance-in-hbv-carrier-mice
#3
Yingjie Bian, Zheng Zhang, Zhichen Sun, Juanjuan Zhao, Danming Zhu, Yang Wang, Sherry Fu, Jingya Guo, Longchao Liu, Lishan Su, Fu-Sheng Wang, Yang-Xin Fu, Hua Peng
Strong tolerance to HBV surface antigens limits the therapeutic effect of the conventional HBsAg vaccination in both preclinical animal models and patients with chronic hepatitis B (CHB) infection. In contrast, we observed that clinical CHB patients presented less immune tolerance to the preS1 domain of HBV large surface antigen. To study whether targeting the weak tolerance of preS1 region could improve therapy gain, we explored vaccination with the long peptide of preS1 domain for HBV virions clearance. Our study showed that this preS1-polypeptide rather than HBsAg vaccination induced robust immune responses in the HBV carrier mice...
April 26, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28445910/influence-of-contrast-media-on-bone-mineral-density-bmd-measurements-from-routine-contrast-enhanced-mdct-datasets-using-a-phantom-less-bmd-measurement-tool
#4
Andrea Toelly, Constanze Bardach, Michael Weber, Rui Gong, Yanbo Lai, Pei Wang, Yulin Guo, Jan Kirschke, Thomas Baum, Michael Gruber
Aim To evaluate the differences in phantom-less bone mineral density (BMD) measurements in contrast-enhanced routine MDCT scans at different contrast phases, and to develop an algorithm for calculating a reliable BMD value. Materials and Methods 112 postmenopausal women from the age of 40 to 77 years (mean age: 57.31 years; SD 9.61) who underwent a clinically indicated MDCT scan, consisting of an unenhanced, an arterial, and a venous phase, were included. A retrospective analysis of the BMD values of the Th12 to L4 vertebrae in each phase was performed using a commercially available phantom-less measurement tool...
April 26, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28445825/physico-chemical-protection-rather-than-biochemical-composition-governs-the-responses-of-soil-organic-carbon-decomposition-to-nitrogen-addition-in-a-temperate-agroecosystem
#5
Wenbing Tan, Guoan Wang, Caihong Huang, Rutai Gao, Beidou Xi, Biao Zhu
The heterogeneous responses of soil organic carbon (SOC) decomposition in different soil fractions to nitrogen (N) addition remain elusive. In this study, turnover rates of SOC in different aggregate fractions were quantified based on changes in δ(13)C following the conversion of C3 to C4 vegetation in a temperate agroecosystem. The turnover of both total organic matter and specific organic compound classes within each aggregate fraction was inhibited by N addition. Moreover, the intensity of inhibition increases with decreasing aggregate size and increasing N addition level, but does not vary among chemical compound classes within each aggregate fraction...
April 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28445780/mitochondrial-ribosomes-in-cancer
#6
REVIEW
Hyun-Jung Kim, Priyanka Maiti, Antoni Barrientos
Mitochondria play fundamental roles in the regulation of life and death of eukaryotic cells. They mediate aerobic energy conversion through the oxidative phosphorylation (OXPHOS) system, and harbor and control the intrinsic pathway of apoptosis. As a descendant of a bacterial endosymbiont, mitochondria retain a vestige of their original genome (mtDNA), and its corresponding full gene expression machinery. Proteins encoded in the mtDNA, all components of the multimeric OXPHOS enzymes, are synthesized in specialized mitochondrial ribosomes (mitoribosomes)...
April 23, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28445641/exfoliation-of-lini1-3mn1-3co1-3o2-into-nanosheets-using-electrochemical-oxidation-and-reassembly-with-dialysis-or-flocculation
#7
Qian Cheng, Ting Yang, Man Li, Candace K Chan
Two-dimensional (2D) materials such as nanosheets are increasingly attracting attention for applications in energy storage and conversion. Many conventional battery compounds have layered structures, which can facilitate the exfoliation of these materials into nanosheet morphologies. In this work, LiNi1/3Mn1/3Co1/3O2 (NMC) particles were exfoliated into nanosheets using an electrochemical oxidation method enabled by the intercalation of tetraethylammonium cations into the interlayer space. The exfoliated materials were monolayer or double-layer nanosheets with hexagonal shapes and sizes < 50 nm...
April 26, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28445637/control-of-charge-carriers-trapping-and-relaxation-in-hematite-by-oxygen-vacancy-charge-ab-initio-non-adiabatic-molecular-dynamics
#8
Zhaohui Zhou, Jin Liu, Run Long, Linqiu Li, Liejin Guo, Oleg V Prezhdo
Ultrafast charge recombination in hematite (α-Fe2O3) severely limits its applications in solar energy conversion and utilization, for instance, in photo-electrochemical water splitting. We report the first time-domain ab initio study of charge relaxation dynamics in α-Fe2O3 with and without the oxygen vacancy (Ov) defect, using non-adiabatic molecular dynamics implemented within time-dependent density functional theory. The simulations show that the hole trapping is the rate-limiting step in the electron-hole recombination process for both neutral and ionized Ov systems...
April 26, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28445629/n-acetonitrile-functionalized-nitropyrazoles-precursors-to-insensitive-asymmetric-n-methylene-c-linked-azoles
#9
Jean'ne Shreeve, Dheeraj Kumar, Gregory H Imler, Damon Parrish
Properties of energetic compounds obtained by linking energetic pyrazoles to tetrazoles by means of N-methylene-C bridges can be fine-tuned. Reactions of pyrazole derivatives with chloroacetonitrile followed by conversion of the cyano group to tetrazole using click reactions in the presence of zinc chloride result in asymmetric N-methylene-C bridged azole-based energetic compounds. All the compounds were thoroughly characterized by IR, NMR [1H, 13C {1H}, 15N], elemental analysis, and differential scanning calorimetry (DSC), and for 2 and 10, further supported by single-crystal X-ray diffraction studies...
April 26, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28445619/mtor-inhibitors-and-risk-for-chronic-antibody-mediated-rejection-after-kidney-transplantation-where-are-we-now
#10
REVIEW
Philippe Grimbert, Olivier Thaunat
Antibody-mediated rejection (AMR) usually starts with generation of donor-specific anti-HLA antibodies (DSA), arising from a B-cell response to antigen recognition. In vitro and preclinical data demonstrate that mammalian target of rapamycin (mTOR) inhibition attenuates the mTOR-mediated intracellular signaling pathway involved in AMR-related kidney damage. The limited available data from immunological studies in kidney transplant patients, however, have not shown such effects in vivo. In terms of clinical immunosuppression, the overriding influence on rates of de novo DSA (dnDSA) or AMR - regardless of the type of regimen - is patient adherence...
April 26, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28445494/maternal-perception-of-children-s-nutritional-status-in-the-federal-district-brazil
#11
Jéssica Pedroso, Natacha Toral, Muriel Bauermann Gubert
Maternal perception of child's nutritional status has a potential impact on the identification, prevention, and treatment of childhood overweight. Thus, the aim of this study was to evaluate the prevalence of misperception and factors associated with maternal perception of the nutritional status of first- to third-grade elementary school students from private schools in the Federal District, Brazil. This cross-sectional study was conducted with 554 mother-child pairs. Children's nutritional status was assessed by measuring their weight and height...
2017: PloS One
https://www.readbyqxmd.com/read/28445459/the-effect-of-illumination-on-the-formation-of-metal-halide-perovskite-films
#12
Amita Ummadisingu, Ludmilla Steier, Ji-Youn Seo, Taisuke Matsui, Antonio Abate, Wolfgang Tress, Michael Grätzel
Optimizing the morphology of metal halide perovskite films is an important way to improve the performance of solar cells when these materials are used as light harvesters, because film homogeneity is correlated with photovoltaic performance. Many device architectures and processing techniques have been explored with the aim of achieving high-performance devices, including single-step deposition, sequential deposition and anti-solvent methods. Earlier studies have looked at the influence of reaction conditions on film quality, such as the concentration of the reactants and the reaction temperature...
April 26, 2017: Nature
https://www.readbyqxmd.com/read/28445435/microarray-selection-of-cooperative-peptides-for-modulating-enzyme-activities
#13
Jinglin Fu
Recently, peptide microarrays have been used to distinguish proteins, antibodies, viruses, and bacteria based on their binding to random sequence peptides. We reported on the use of peptide arrays to identify enzyme modulators that involve screening an array of 10,000 defined and addressable peptides on a microarray. Primary peptides were first selected to inhibit the enzyme at low μM concentrations. Then, new peptides were found to only bind strongly with the enzyme-inhibitor complex, but not the native enzyme...
April 26, 2017: Microarrays
https://www.readbyqxmd.com/read/28445392/death-caf%C3%A3-s-death-doulas-and-family-communication
#14
Paula K Baldwin
The Death Café is part of the Death Positive movement, and as such, is uniquely positioned to bring the dialogue about death and dying to the public. Participants in a Death Café typically have two different perspectives. Some participants have not experienced death in their family and friends' circle and wish to converse with others about their beliefs on death and dying. Others are those who have experienced death somewhere in their circle of friends and families. One of goals of the Death Café facilitators is to help attendees reconcile their family narratives regarding death using the broader lens of the Death Café...
April 26, 2017: Behavioral Sciences
https://www.readbyqxmd.com/read/28445216/opposition-to-obamacare-a-closer-look
#15
Paul R Gordon, Laurel Gray, Alex Hollingsworth, Eve C Shapiro, James E Dalen
Prior telephone surveys have reported two main reasons for opposition to the Affordable Care Act (ACA): distrust of government and opposition to the universal coverage mandate. The authors set out to elucidate the reasons for this opposition. This article describes how the authors used qualitative methods with semistructured interviewing as a principal investigative method to gather information from people they met while bicycling across the United States from April through July 2016. During this time, the authors conducted open-ended, semistructured conversations with people they met as they rode their bicycles from Washington, DC, to Seattle, Washington...
April 25, 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28445169/continuous-size-and-shape-control-synthesis-of-hollow-silica-nanoparticles-enabled-by-a-microreactor-assisted-rapid-mixing-process
#16
Yujuan He, Ki-Joong Kim, Chih-Hung Alex Chang
Hollow silica nanoparticles (HSNPs) were synthesized using a microreactor-assisted system with a hydrodynamic focusing micromixer (HFM). Due to the fast mixing of each precursor in the system, the PAA thermodynamic-locked (TML) conformations were protected from their random aggregations by the immediately initiated growth of silica shells. When altering the mixing time through varying flow rates and flow rate ratios, the different degrees of the aggregation of PAA TML conformations were observed. The globular and necklace-like TML conformations were successfully captured by modifying the PAA concentration at the optimized mixing condition...
April 26, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28445131/therapeutic-benefit-of-salmonella-attributed-to-lps-and-tnf-%C3%AE-is-exhaustible-and-dictated-by-tumor-susceptibility
#17
Dino Kocijancic, Sara Leschner, Sebastian Felgner, Ronja-Melinda Komoll, Michael Frahm, Vinay Pawar, Siegfried Weiss
The potential of bacteria-mediated tumor therapy (BMTT) is highlighted by more than a century of investigation. Attenuated Salmonella has prevailed as promising therapeutic agents. For BMTT - categorized as an immune therapy - the exact contribution of particular immune reactions to the therapeutic effect remains ambiguous. In addition, one could argue for or against the requirement of bacterial viability and tumor targeting. Herein we evaluate the isolated therapeutic efficacy of purified LPS and TNF-α, which together account for a dominant immunogenic pathway of gram negative bacteria like Salmonella...
April 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28445106/tension-free-inlay-repair-of-large-hiatal-hernias-using-dual-sided-composite-ptfe-eptfe-meshes-in-laparoscopic-surgery-for-gastroesophageal-reflux-disease
#18
Alexander M Prusa, Ivan Kristo, Erwin Rieder, Claudia Ringhofer, Reza Asari, Johannes Miholic, Sebastian F Schoppmann
BACKGROUND: Patients with gastroesophageal reflux disease (GERD) also frequently suffer from concomitant hiatal hernia. It has been described that a preoperative hiatal hernia of ≥3 cm is associated with a more than threefold relative risk for reflux symptom recurrence after fundoplication without mesh reinforcement. In this report, we describe our experience with the implantation of dual-sided composite PTFE/ePTFE meshes in a tension-free fashion during laparoscopic antireflux surgery (LARS)...
April 26, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28445100/remap-a-framework-for-goals-of-care-conversations
#19
Julie W Childers, Anthony L Back, James A Tulsky, Robert M Arnold
Conversations regarding goals of care with patients who have advanced cancer still occur too late, and oncologists say they lack the training to have these conversations effectively. Experts recommend a number of strategies when having these discussions, including discussing prognosis, responding to patient emotion, exploring values, and often making a recommendation for medical treatments that fit those values. To help learners, from residents to attending oncologists, learn these complex conversational skills, we have developed a framework with a mnemonic, REMAP: Reframe, Expect emotion, Map out patient goals, Align with goals, and Propose a plan...
April 26, 2017: Journal of Oncology Practice
https://www.readbyqxmd.com/read/28445070/enantioselective-4-2-cycloaddition-of-o-quinone-methides-and-vinyl-sulfides-indirect-access-to-generally-substituted-chiral-chromanes
#20
Zhaobin Wang, Jianwei Sun
A catalytic asymmetric [4 + 2] cycloaddition of ortho-quinone methides (o-QMs) is described. With the readily available vinyl sulfides as the key 2π partner and a properly chosen chiral phosphoric acid catalyst, the reaction proceeded under mild conditions to form the corresponding adduct with high enantio- and diastereoselectivity. Owning to the easy removal and conversion of the sulfenyl group in the product, the present process provides indirect access to generally substituted chromanes previously lacking easy access...
April 26, 2017: Organic Letters
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