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https://www.readbyqxmd.com/read/29228370/a-nf-%C3%AE%C2%BAb-signature-predicts-low-grade-glioma-prognosis-a-precision-medicine-approach-based-on-patient-derived-stem-cells
#1
Tamara Ius, Yari Ciani, Maria Elisabetta Ruaro, Miriam Isola, Marisa Sorrentino, Michela Bulfoni, Veronica Candotti, Cecilia Correcig, Evgenia Bourkoula, Ivana Manini, Enrico Pegolo, Damiano Mangoni, Stefania Marzinotto, Slobodanka Radovic, Barbara Toffoletto, Federica Caponnetto, Andrea Zanello, Laura Mariuzzi, Carla Di Loreto, Antonio Paolo Beltrami, Silvano Piazza, Miran Skrap, Daniela Cesselli
Background: While recent genome wide association studies have suggested novel low-grade glioma (LGG) stratification models based on a molecular classification, we explored the potential clinical utility of patient-derived cells. Specifically, we assayed glioma-associated stem cells (GASC) that are patient-derived stem cells representative of the glioma microenvironment. Methods: By next generation sequencing, we analyzed the transcriptional profile of GASC derived from patients that underwent anaplastic transformation either within 48 months (GASC-BAD) or ≥7 years (GASC-GOOD) after surgery...
December 7, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/29228300/dna-synthesis-by-fragment-assembly-using-extra-cellular-dna-delivered-by-artificial-controlled-horizontal-transfer
#2
Shinya Kaneko, Hiromi Fukushima, Misako Nakahama, Satomi Asano, Yasumasa Miyazaki, Yasunori Aizawa, Mitsuhiro Itaya
DNA synthesis in the Bacillus subtilis cells has become possible using extra-cellular DNA. Generally, purified DNAs in a test tube have been required to introduce into the host cells for molecular cloning technology in the laboratory. We have developed a cell lysis technique for natural transformation using stable extra-cellular plasmid DNAs, in which the extra-cellular plasmid DNAs are released from lysed Escherichia coli cells. DNA synthesis then proceeds by fragment assembly using the stable extracellular DNAs, without biochemical purification...
December 7, 2017: Journal of Biochemistry
https://www.readbyqxmd.com/read/29228273/direct-detection-of-exophiala-and-scedosporium-species-in-sputa-of-patients-with-cystic-fibrosis
#3
Min Chen, Nahid Kondori, Shuwen Deng, A H G Gerrits van den Ende, M Lackner, Wanqing Liao, G S de Hoog
Detection of species of Exophiala and Scedosporium in the respiratory tracts of cystic fibrosis (CF) patients remains controversial because of highly variable results. The results of our study suggested a significantly higher prevalence and more complex colonization than previously estimated. Approximately 17% (27/162) of clinical sputum samples were found to be positive for Exophiala dermatitidis and 30% (49/162) were positive for Scedosporium apiospermum / S. boydii species complex determined by reverse line blot (RLB) hybridization...
December 8, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29228246/clinical-impact-of-candida-spp-biofilm-production-in-a-cohort-of-patients-with-candidemia
#4
Priscilla Morais Monfredini, Ana Carolina Remondi Souza, Renan Pelluzzi Cavalheiro, Ricardo Andreotti Siqueira, Arnaldo Lopes Colombo
Persistent candidemia refers to the continued isolation of the same Candida species in the blood of a candidemic patient despite appropriate therapy. Despite the clinical importance of persistent candidemia, studies have superficially addressed the biological conditions behind this phenomenon. The aim of this study was to evaluate the correlation between the biofilm-forming ability by Candida bloodstream isolates and the persistence of infection. A total of 55 isolates of Candida were tested and characterized in two groups: (i) group I, which included seven patients with persistent candidemia, and (ii) group II, which included 18 patients with nonpersistent candidemia...
December 8, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29228218/nonhuman-primate-models-and-understanding-the-pathogenesis-of-hiv-infection-and-aids
#5
Ronald S Veazey, Andrew A Lackner
Research using nonhuman primates (NHPs) as models for human immunodeficiency virus (HIV) infection and acquired immunodeficiency syndrome (AIDS) has resulted in tremendous achievements not only in the prevention and treatment of HIV, but also in biomedical research more broadly. Once considered a death sentence, HIV infection is now fairly well controlled with combination antiretroviral treatments, almost all of which were first tested for efficacy and safety in nonhuman primates or other laboratory animals...
December 8, 2017: ILAR Journal
https://www.readbyqxmd.com/read/29228211/asymmetry-of-post-mortem-neuropathology-in-behavioural-variant-frontotemporal-dementia
#6
David J Irwin, Corey T McMillan, Sharon X Xie, Katya Rascovsky, Vivianna M Van Deerlin, H Branch Coslett, Roy Hamilton, Geoffrey Aguirre, Edward B Lee, Virginia M Y Lee, John Q Trojanowski, Murray Grossman
Antemortem behavioural and anatomic abnormalities have largely been associated with right hemisphere disease in behavioural-variant frontotemporal dementia, but post-mortem neuropathological examination of bilateral hemispheres remains to be defined. Here we measured the severity of post-mortem pathology in both grey and white matter using a validated digital image analysis method in four cortical regions sampled from each hemisphere in 26 patients with behavioural-variant frontotemporal dementia, including those with frontotemporal degeneration (i...
December 8, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29228176/screening-and-identification-of-immunoactive-flab-protein-fragments-of-treponema-pallidum-for-the-serodiagnosis-of-syphilis
#7
Manyi Tan, Man Xu, Yongjian Xiao, Yafeng Xie, Chuanhao Jiang, Kang Zheng, Qian Chen, Feijun Zhao, Tiebing Zeng, Yimou Wu
Flagellin is a classical pathogen-associated molecular pattern that can evoke robust immune response. We have demonstrated previously that three full-length flagellins of Treponema pallidum, namely FlaB1, FlaB2 and FlaB3, did have diagnostic value in serodiagnosis of syphilis. Here, we selected and constructed three recombinant fragments of each complete FlaB, both the conserved N-terminal and the C-terminal region, and the middle variable part, with the goal of exploring fragment unique to Treponema pallidum for use as antigen target in a fragment based serological test...
December 5, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/29228154/comparative-transcriptomic-analysis-of-human-placentae-at-term-and-preterm-delivery
#8
Alison G Paquette, Heather M Brockway, Nathan D Price, Louis J Muglia
Purpose: Preterm birth affects 1 out of every 10 infants in the United States, resulting in substantial neonatal morbidity and mortality. Currently, there are few predictive markers and few treatment options to prevent preterm birth. A healthy, functioning placenta is essential to positive pregnancy outcomes. Previous studies have suggested that placental pathology may play a role in preterm birth etiology. Therefore, we tested the hypothesis that preterm placentae may exhibit unique transcriptomic signatures compared to term samples reflective of their abnormal biology leading to this adverse outcome...
December 4, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29228024/detection-of-duo-schistosome-infection-from-filtered-urine-samples-from-school-children-in-zambia-after-mda
#9
Megan J Hessler, Austin Cyrs, Steven C Krenzke, El Shaimaa Mahmoud, Chummy Sikasunge, James Mwansa, Nilanjan Lodh
Schistosomiasis is one of the major Neglected Tropical Diseases (NTDs) in sub-Saharan Africa. In sub-Saharan Africa, two major human schistosome species namely Schistosoma mansoni and S. haematobium often occur sympatrically largely affecting children. Recognizing the public health impact of Schistosomiasis, the World Health Organization (WHO) is urging member states to regularly treat at least 75% and up to 100%, of all school-aged children at risk of morbidity. For control strategies based on targeted mass drug administration (MDA) to succeed it is essential to have a simple and sensitive test for monitoring the success of these interventions...
2017: PloS One
https://www.readbyqxmd.com/read/29228016/prevalence-and-molecular-profiling-of-epstein-barr-virus-ebv-among-healthy-blood-donors-from-different-nationalities-in-qatar
#10
Maria K Smatti, Hadi M Yassine, Raed AbuOdeh, Asmaa AlMarawani, Sara A Taleb, Asmaa A Althani, Gheyath K Nasrallah
BACKGROUND: The Epstein-Barr virus (EBV) is the causative agent of infectious mononucleosis. EBV is highly prevalent lymphotropic herpesvirus and has been linked to several malignancies. Transmission is generally by oral secretions, but can be through blood transfusions and organ transplantations. This study aimed to determine the seroprevalence, viremia rates, and circulating genotypes of EBV in healthy blood donors in Qatar. METHODS: Blood samples from 673 blood donors of different nationalities residing in Qatar (mainly Qatar, Egypt, Syria, Jordan, Pakistan, and India) were collected and tested for anti-EBV capsid (VCA; IgG & IgM), nuclear (EBNA; IgG), and early (EA-D; IgG) antigens...
2017: PloS One
https://www.readbyqxmd.com/read/29227915/novel-1-2-4-triazole-derivatives-as-potential-anticancer-agents-design-synthesis-molecular-docking-and-mechanistic-studies
#11
Hany A M El-Sherief, Bahaa G M Youssif, Syed Nasir Abbas Bukhari, Mohamed Abdel-Aziz, Hamdy M Abdel-Rahman
A series of novel compounds carrying 1,2,4-triazole scaffold was synthesized and evaluated for their anticancer activity against a panel of cancer cell lines using MTT assay. Compounds 8a, 8b, 8c, 8d, 10b, 10e, and 10 g showed remarkable antiproliferative activity against the tested cell lines. Compounds 8a, 8b, 8c, 8d, 10b, 10e, and 10 g with the least IC50 values in MTT assay were tested against three known anticancer targets including EGFR, BRAF and Tubulin. The results revealed that compounds 8c and 8d showed almost same BRAF inhibitory activity and were discovered to be potent inhibitors of cancer cell proliferation and were also observed to be strong Tubulin inhibitors...
December 5, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/29227890/a-novel-hydrophobically-modified-polyelectrolyte-for-enhanced-dewatering-of-clay-suspension
#12
Sarang P Gumfekar, João B P Soares
This work investigates the effect of multifunctional poly (N-isopropyl acrylamide/acrylic acid/N-tert-butylacrylamide) [p(NIPAM-AA-NTBA)] ternary polymer on the sedimentation of kaolin clay - a major fraction of oil sands tailings. A series of linear, uncross-linked p(NIPAM), p(NIPAM/AA), and p(NIPAM/AA/NTBM) were synthesized as random copolymers, where all monomer units were randomly arranged along the polymer backbone and connected by covalent bonds. The ternary copolymer, used as a flocculant, exhibited thermo-sensitivity, anionic nature, and hydrophobic association due to NIPAM, AA, and NTBM, respectively...
December 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/29227751/molecular-evolution-and-expression-of-oxygen-transport-genes-in-livebearing-fishes-poeciliidae-from-hydrogen-sulfide-rich-springs
#13
Nick Barts, Ryan Greenway, Courtney N Passow, Lenin Arias-Rodriguez, Joanna L Kelley, Michael Tobler
Hydrogen sulfide (H2S) is a natural toxicant in some aquatic environments that has diverse molecular targets. It binds to oxygen transport proteins, rendering them non-functional by reducing oxygen-binding affinity. Hence, organisms permanently inhabiting H2S-rich environments are predicted to exhibit adaptive modifications to compensate for the reduced capacity to transport oxygen. We investigated ten lineages of fish of the family Poeciliidae that have colonized freshwater springs rich in H2S - along with related lineages from non-sulfidic environments - to test hypotheses about the expression and evolution of oxygen transport genes in a phylogenetic context...
December 11, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/29227741/new-subclass-b1-metallo-%C3%AE-lactamase-gene-from-a-clinical-pathogenic-myroides-odoratus-strain
#14
Su Xu, Yijian Chen, Zhuyingjie Fu, Ying Li, Guixiu Shi, Xiaogang Xu, Yang Liu, Minggui Wang
Myroides odoratus is a low-virulence opportunistic human pathogen. Infections caused by M. odoratus are not common, but reports are increasing in recent years. The biggest challenge for treatment is its resistance to most antibiotics. In 2015, we isolated a pathogenic multidrug-resistant strain of M. odoratus from a urinary tract infection (UTI) patient's urine sample. To report the experience in managing M. odoratus-related UTI and investigate the genetic mechanism of this carbapenem-resistant strain, we conducted a series of microbiological and molecular studies...
December 11, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29227035/mass-spectrometry-analyses-of-multicellular-tumour-spheroids
#15
REVIEW
Mitchell Acland, Parul Mittal, Noor A Lokman, Manuela Klingler-Hoffmann, Martin K Oehler, Peter Hoffmann
Multicellular tumour spheroids (MCTS) are a powerful biological in vitro model, which closely mimics the 3D structure of primary avascularised tumours. Mass spectrometry (MS) has established itself as a powerful analytical tool, not only to better understand and describe the complex structure of MCTS, but also to monitor their response to cancer therapeutics. The first part of this review focuses on traditional mass spectrometry approaches with an emphasis on elucidating the molecular characteristics of these structures...
December 11, 2017: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/29226998/antisense-suppression-of-glial-fibrillary-acidic-protein-as-a-treatment-for-alexander-disease
#16
Tracy L Hagemann, Berit Powers, Curt Mazur, Aneeza Kim, Steven Wheeler, Gene Hung, Eric Swayze, Albee Messing
OBJECTIVE: Alexander disease is a fatal leukodystrophy caused by autosomal dominant gain-of-function mutations in the gene for glial fibrillary acidic protein (GFAP), an intermediate filament protein primarily expressed in astrocytes of the central nervous system. A key feature of pathogenesis is over-expression and accumulation of GFAP, with formation of characteristic cytoplasmic aggregates known as Rosenthal fibers. Here we investigate whether suppressing GFAP with antisense oligonucleotides could provide a therapeutic strategy for treating Alexander disease...
December 11, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/29226953/micrornas-in-cutaneous-melanoma-role-as-diagnostic-and-prognostic-biomarkers
#17
REVIEW
Casey L Ross, Shivani Kaushik, Rodrigo Valdes-Rodriguez, Rina Anvekar
Melanoma is the leading cause of skin cancer deaths in the United States, and its incidence has been rising steadily for the past 30 years (Aftab et al, 2014). A more complete understanding of the molecular mechanisms that drive melanomagenesis is crucial to improve diagnosis, prognostication, and treatment of this disease. Given that melanoma survival rates are better when the disease is detected early, precise diagnostic tests for early melanoma detection would be extremely useful. In addition, as survival rates decrease drastically when the disease becomes metastatic, improved tools to more precisely identify high-risk patients as well as to predict treatment response are necessary...
December 11, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29226853/clinical-and-rna-expression-integrated-signature-for-urothelial-bladder-cancer-prognosis
#18
Jie Xiong, Ke Xiong, Zhitong Bing
BACKGROUND: Accumulating evidence shows that clinical factors alone are not adequate for predicting the survival of patients with urothelial bladder cancer (UBC), and many genes have been found to be associated with UBC prognosis. PURPOSE: The objective of this study is to develop a signature which integrates clinical and molecular information to predict the overall survival of UBC patients more accurate. MATERIALS AND METHODS: We integrated messenger RNA (mRNA) and microRNA (miRNA) expression profiles and the corresponding clinical data of 402 UBC patients and 19 normal controls from The Cancer Genome Atlas...
November 25, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/29226848/adsorption-of-triazine-herbicides-from-aqueous-solution-by-functionalized-multiwall-carbon-nanotubes-grown-on-silicon-substrate
#19
Angelo Antonio D'Archivio, Maria Anna Maggi, Antonella Odoardi, Sandro Santucci, Maurizio Passacantando
Multi-walled carbon nanotubes (MWCNTs), because of small size and large available surface area, are potentially efficient sorbents for the extraction of water solutes. Dispersion of MWCNTs in the aqueous medium is suitable to adsorb organic contaminants from small sample volumes, but, the recovery of the suspended sorbent for successive re-use represents a critical step, which makes this method inapplicable in large-scale water-treatment technologies. To overcome this problem, we proposed here MWCNTs grown on silicon supports and investigated on a small-volume scale their adsorption properties towards triazine herbicides dissolved in water...
December 11, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29226803/quantitative-missense-variant-effect-prediction-using-large-scale-mutagenesis-data
#20
Vanessa E Gray, Ronald J Hause, Jens Luebeck, Jay Shendure, Douglas M Fowler
Large datasets describing the quantitative effects of mutations on protein function are becoming increasingly available. Here, we leverage these datasets to develop Envision, which predicts the magnitude of a missense variant's molecular effect. Envision combines 21,026 variant effect measurements from nine large-scale experimental mutagenesis datasets, a hitherto untapped training resource, with a supervised, stochastic gradient boosting learning algorithm. Envision outperforms other missense variant effect predictors both on large-scale mutagenesis data and on an independent test dataset comprising 2,312 TP53 variants whose effects were measured using a low-throughput approach...
December 1, 2017: Cell Systems
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