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https://www.readbyqxmd.com/read/28931265/diagnostic-and-interventional-optical-angioscopy-in-ex-vivo-carotid-arteries
#1
Luis E Savastano, Neeraj Chaudhary, Carlos Murga-Zamalloa, Michael Wang, Thomas Wang, B Gregory Thompson
BACKGROUND: Angioscopy - or endovascular endoscopy - is a catheter-based technique employing a flexible fiberoptic angioscope to directly visualize arterial lumen. Poor resolution and excessive stiffness of pre-existent angioscopes limited their use clinically. Recent advances resulted in novel fused optical fiber bundle angioscopes with improved flexibility and imaging resolution. Use of these devices in endovascular neurosurgery is still largely unexplored. OBJECTIVE: To evaluate image quality and feasibility of optical angioscopes for diagnostic and interventional neuro-angioscopy in carotid arteries of human cadavers...
February 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28931241/association-of-a-novel-mutation-in-the-plasmodium-falciparum-chloroquine-resistance-transporter-with-decreased-piperaquine-sensitivity
#2
Sonia Agrawal, Kara A Moser, Lindsay Morton, Michael P Cummings, Ankita Parihar, Ankit Dwivedi, Amol C Shetty, Elliott F Drabek, Christopher G Jacob, Philipp P Henrich, Christian M Parobek, Krisada Jongsakul, Rekol Huy, Michele D Spring, Charlotte A Lanteri, Suwanna Chaorattanakawee, Chanthap Lon, Mark M Fukuda, David L Saunders, David A Fidock, Jessica T Lin, Jonathan J Juliano, Christopher V Plowe, Joana C Silva, Shannon Takala-Harrison
Background: Amplified copy number in the plasmepsin II/III genes within Plasmodium falciparum has been associated with decreased sensitivity to piperaquine. To examine this association and test whether additional loci might also contribute, we performed a genome-wide association study of ex vivo P. falciparum susceptibility to piperaquine. Methods: Plasmodium falciparum DNA from 183 samples collected primarily from Cambodia was genotyped at 33716 genome-wide single nucleotide polymorphisms (SNPs)...
August 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28931235/monoclonal-antibody-protects-against-acinetobacter-baumannii-infection-by-enhancing-bacterial-clearance-and-evading-sepsis
#3
Travis B Nielsen, Paul Pantapalangkoor, Brian M Luna, Kevin W Bruhn, Jun Yan, Ken Dekitani, Sarah Hsieh, Brandon Yeshoua, Bryan Pascual, Evgeny Vinogradov, Kristine M Hujer, T Nicholas Domitrovic, Robert A Bonomo, Thomas A Russo, Magda Lesczcyniecka, Thomas Schneider, Brad Spellberg
Background: Extremely drug-resistant (XDR) Acinetobacter baumannii is one of the most commonly encountered, highly resistant pathogens requiring novel therapeutic interventions. Methods: We developed C8, a monoclonal antibody (mAb), by immunizing mice with sublethal inocula of a hypervirulent XDR clinical isolate. Results: C8 targets capsular carbohydrate on the bacterial surface, enhancing opsonophagocytosis. Treating with a single dose of C8 as low as 0...
August 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28931219/long-term-chikungunya-sequelae-in-cura%C3%A3-ao-burden-determinants-and-a-novel-classification-tool
#4
Jelte Elsinga, Izzy Gerstenbluth, Symkje van der Ploeg, Yaskara Halabi, Norédiz T Lourents, Johannes G Burgerhof, Henry T van der Veen, Ajay Bailey, Martin P Grobusch, Adriana Tami
Background: Beyond the acute illness phase, chikungunya constitutes a public health problem given its chronic disease phase, which may include long-term arthralgia, arthritis, fatigue, and depression. Currently, there is no consensus on how to define chikungunya chronicity. Methods: A comprehensive cross-sectional survey was performed in Curaçao in June and July 2015 to evaluate 304 adult laboratory-confirmed chikungunya patients 3-16 months after diagnosis. We developed a novel tool, the Curaçao Long-Term Chikungunya Sequelae (CLTCS) score, to classify chronic chikungunya disease and estimate its burden regarding disease duration, clinical presentation, and impact on quality of life...
September 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28931214/baicalin-alleviates-radiation-induced-epithelial-mesenchymal-transition-of-primary-type-ii-alveolar-epithelial-cells-via-tgf-%C3%AE-and-erk-gsk3%C3%AE-signaling-pathways
#5
Jinhua Lu, Yazhen Zhong, Zechen Lin, Xianlei Lin, Zhaohui Chen, Xuping Wu, Nan Wang, Haiqiao Zhang, Siyu Huang, Yuan Zhu, Yuanyuan Wang, Shengyou Lin
BACKGROUND: Radiation therapy is commonly used to treat thoracic malignancies. However, it may lead to severe lung pneumonitis and ultimately fibrosis. Irradiation has been reported to increase epithelial-mesenchymal transition (EMT) of type II alveolar epithelial cells (AEC), which play an important role in pulmonary fibrosis. The transforming growth factor-β (TGF-β) and ERK/glycogen synthase kinase 3β (GSK3β) pathways are critically involved in radiation-induced EMT. In the present study, we investigated whether baicalin was a novel therapeutic candidate for radiation-induced EMT in type II AEC...
September 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28931212/temozolomide-resistant-human-brain-tumor-stem-cells-are-susceptible-to-recombinant-vesicular-stomatitis-virus-and-double-deleted-vaccinia-virus-in-vitro
#6
Bin Jiang, Xueqing Lun, Xiaoguang Hao, Yihua Wang, Xin Yin, Dezhang Huang, Wei He, Zhigang Wang
BACKGROUND: Malignant glioma still has a poor prognosis and remains incurable. Although temozolomide (TMZ) has demonstrated antitumor activity, its use recently has been halted because of some patients' resistance to this drug. New treatments are desperately needed. An oncolytic virus (virotherapy) is being developed as a novel cancer therapy. We have previously reported that recombinant Vesicular Stomatitis Virus (VSV-ΔM51) and double deleted Vaccinia Virus (vvDD) infected and killed glioma cell lines in vitro and prolonged survival in animal glioma models...
September 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28931161/probing-behavior-of-dichelops-furcatus-f-heteroptera-pentatomidae-on-wheat-plants-characterized-by-electropenetrography-epg-and-histological-studies
#7
Tiago Lucini, Antônio Ricardo Panizzi
The stink bug Dichelops furcatus (F.) (Heteroptera: Pentatomidae) has increased in abundance in recent years on the wheat, Triticum aestivum L., crop cultivated in the southern region of Brazil. To investigate the probing (stylet penetration) behaviors and nonprobing behaviors of D. furcatus on wheat plants, the electrical penetration graph or electropenetrography (EPG) technique was applied. Nine EPG waveforms (types/subtypes) were identified and described on stem and on ear head of wheat plants, as follows: Z, Np, Df1a, Df1b, Df2, Df3a, Df3b, Df4a, and Df4b...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28931084/barcoding-snakeheads-teleostei-channidae-revisited-discovering-greater-species-diversity-and-resolving-perpetuated-taxonomic-confusions
#8
Cecilia Conte-Grand, Ralf Britz, Neelesh Dahanukar, Rajeev Raghavan, Rohan Pethiyagoda, Heok Hui Tan, Renny K Hadiaty, Norsham S Yaakob, Lukas Rüber
Snakehead fishes of the family Channidae are predatory freshwater teleosts from Africa and Asia comprising 38 valid species. Snakeheads are important food fishes (aquaculture, live food trade) and have been introduced widely with several species becoming highly invasive. A channid barcode library was recently assembled by Serrao and co-workers to better detect and identify potential and established invasive snakehead species outside their native range. Comparing our own recent phylogenetic results of this taxonomically confusing group with those previously reported revealed several inconsistencies that prompted us to expand and improve on previous studies...
2017: PloS One
https://www.readbyqxmd.com/read/28931082/barcoding-atlantic-canada-s-mesopelagic-and-upper-bathypelagic-marine-fishes
#9
Ellen L Kenchington, Shauna M Baillie, Trevor J Kenchington, Paul Bentzen
DNA barcode sequences were developed from 557 mesopelagic and upper bathypelagic teleost specimens collected in waters off Atlantic Canada. Confident morphological identifications were available for 366 specimens, of 118 species and 93 genera, which yielded 328 haplotypes. Five of the species were novel to the Barcode of Life Database (BOLD). Most of the 118 species conformed to expectations of monophyly and the presence of a "barcode gap", though some known weaknesses in existing taxonomy were confirmed and a deficiency in published keys was revealed...
2017: PloS One
https://www.readbyqxmd.com/read/28931069/methylation-associated-transcriptional-repression-of-elovl5-in-novel-colorectal-cancer-cell-lines
#10
Arnoud Boot, Jan Oosting, Jaap D H van Eendenburg, Peter J K Kuppen, Hans Morreau, Tom van Wezel
Genetic and epigenetic alterations mark colorectal cancer (CRC). Global hypomethylation is observed in nearly all CRC, but a distinct subset of CRC show the CpG Island Methylator Phenotype (CIMP). These tumors show DNA hypermethylation of a specific subset of CpG islands, resulting in transcriptional downregulation of nearby genes. Recently we reported the establishment of novel CRC cell lines derived from primary and metastatic CRC tissues. In this study we describe the DNA methylation profiling of these low passage CRC cell lines...
2017: PloS One
https://www.readbyqxmd.com/read/28931067/in-vivo-imaging-system-for-explants-analysis-a-new-approach-for-assessment-of-cell-transplantation-effects-in-large-animal-models
#11
Weronika Zarychta-Wiśniewska, Anna Burdzinska, Radosław Zagozdzon, Bartosz Dybowski, Marta Butrym, Zdzisław Gajewski, Leszek Paczek
INTRODUCTION: Despite spectacular progress in cellular transplantology, there are still many concerns about the fate of transplanted cells. More preclinical studies are needed, especially on large animal models, to bridge the translational gap between basic research and the clinic. Herein, we propose a novel approach in analysis of cell transplantation effects in large animals explants using in vivo imaging system (IVIS®) or similar equipment. MATERIAL AND METHODS: In the in vitro experiment cells labeled with fluorescent membrane dyes: DID (far red) or PKH26 (orange) were visualized with IVIS®...
2017: PloS One
https://www.readbyqxmd.com/read/28931066/finite-time-synchronization-of-memristor-based-cohen-grossberg-neural-networks-with-mixed-delays
#12
Chuan Chen, Lixiang Li, Haipeng Peng, Yixian Yang
Finite time synchronization, which means synchronization can be achieved in a settling time, is desirable in some practical applications. However, most of the published results on finite time synchronization don't include delays or only include discrete delays. In view of the fact that distributed delays inevitably exist in neural networks, this paper aims to investigate the finite time synchronization of memristor-based Cohen-Grossberg neural networks (MCGNNs) with both discrete delay and distributed delay (mixed delays)...
2017: PloS One
https://www.readbyqxmd.com/read/28931061/binding-of-a-c-type-lectin-s-coiled-coil-domain-to-the-domeless-receptor-directly-activates-the-jak-stat-pathway-in-the-shrimp-immune-response-to-bacterial-infection
#13
Jie-Jie Sun, Jiang-Feng Lan, Xiao-Fan Zhao, Gerardo R Vasta, Jin-Xing Wang
C-type lectins (CTLs) are characterized by the presence of a C-type carbohydrate recognition domain (CTLD) that by recognizing microbial glycans, is responsible for their roles as pattern recognition receptors in the immune response to bacterial infection. In addition to the CTLD, however, some CTLs display additional domains that can carry out effector functions, such as the collagenous domain of the mannose-binding lectin. While in vertebrates, the mechanisms involved in these effector functions have been characterized in considerable detail, in invertebrates they remain poorly understood...
September 20, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28931051/interleukin-17-positive-mast-cells-influence-outcomes-from-bcg-for-patients-with-cis-data-from-a-comprehensive-characterisation-of-the-immune-microenvironment-of-urothelial-bladder-cancer
#14
Alexander C Dowell, Ellen Cobby, Kaisheng Wen, Adam J Devall, Vinnie During, Jane Anderson, Nicholas D James, Kar K Cheng, Maurice P Zeegers, Richard T Bryan, Graham S Taylor
The tumour immune microenvironment is considered to influence cancer behaviour and outcome. Using a panel of markers for innate and adaptive immune cells we set out to characterise and understand the bladder tumour microenvironment of 114 patients from a prospective multicentre cohort of newly-diagnosed bladder cancer patients, followed-up for 4.33±1.71 years. We found IL-17-positive cells were significantly increased in primary and concomitant carcinoma in situ (CIS), p<0.0001, a highly malignant lesion which is the most significant single risk factor for disease progression...
2017: PloS One
https://www.readbyqxmd.com/read/28931040/newborn-skin-reflection-proof-of-concept-for-a-new-approach-for-predicting-gestational-age-at-birth-a-cross-sectional-study
#15
Zilma Silveira Nogueira Reis, Gabriela Luiza Nogueira Vitral, Ingrid Michelle Fonseca de Souza, Maria Albertina Santiago Rego, Rodney Nascimento Guimaraes
BACKGROUND: Current methods to assess the gestational age during prenatal care or at birth are a global challenge. Disadvantages, such as low accessibility, high costs, and imprecision of clinical tests and ultrasonography measurements, may compromise health decisions at birth, based on the gestational age. Newborns' organs and tissues can indirectly indicate their physical maturity, and we hypothesized that evolutionary changes in their skin, detected using an optoelectronic device meter, may aid in estimating the gestational age...
2017: PloS One
https://www.readbyqxmd.com/read/28931012/cbta-toxin-of-escherichia-coli-inhibits-cell-division-and-cell-elongation-via-direct-and-independent-interactions-with-ftsz-and-mreb
#16
Danielle M Heller, Mrinalini Tavag, Ann Hochschild
The toxin components of toxin-antitoxin modules, found in bacterial plasmids, phages, and chromosomes, typically target a single macromolecule to interfere with an essential cellular process. An apparent exception is the chromosomally encoded toxin component of the E. coli CbtA/CbeA toxin-antitoxin module, which can inhibit both cell division and cell elongation. A small protein of only 124 amino acids, CbtA, was previously proposed to interact with both FtsZ, a tubulin homolog that is essential for cell division, and MreB, an actin homolog that is essential for cell elongation...
September 20, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28930989/demonstration-of-a-hyperlens-integrated-microscope-and-super-resolution-imaging
#17
Dasol Lee, Minkyung Kim, Sunae So, Inki Kim, Gwanho Yoon, Kyunghoon Kim, Junsuk Rho
The use of super-resolution imaging to overcome the diffraction limit of conventional microscopy has attracted the interest of researchers in biology and nanotechnology. Although near-field scanning microscopy and superlenses have improved the resolution in the near-field region, far-field imaging in real-time remains a significant challenge. Recently, the hyperlens, which magnifies and converts evanescent waves into propagating waves, has emerged as a novel approach to far-field imaging. Here, we report the fabrication of a spherical hyperlens composed of alternating silver (Ag) and titanium oxide (TiO2) thin layers...
September 8, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28930985/visualizing-angiogenesis-by-multiphoton-microscopy-in-vivo-in-genetically-modified-3d-plga-nhap-scaffold-for-calvarial-critical-bone-defect-repair
#18
Jian Li, Holger Jahr, Wei Zheng, Pei-Gen Ren
The reconstruction of critically sized bone defects remains a serious clinical problem because of poor angiogenesis within tissue-engineered scaffolds during repair, which gives rise to a lack of sufficient blood supply and causes necrosis of the new tissues. Rapid vascularization is a vital prerequisite for new tissue survival and integration with existing host tissue. The de novo generation of vasculature in scaffolds is one of the most important steps in making bone regeneration more efficient, allowing repairing tissue to grow into a scaffold...
September 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28930980/immunostaining-for-dna-modifications-computational-analysis-of-confocal-images
#19
Ashley H Ramsawhook, Lara C Lewis, Maria Eleftheriou, Abdulkadir Abakir, Paulina Durczak, Robert Markus, Seema Rajani, Nicholas R F Hannan, Beth Coyle, Alexey Ruzov
For several decades, 5-methylcytosine (5mC) has been thought to be the only DNA modification with a functional significance in metazoans. The discovery of enzymatic oxidation of 5mC to 5-hydroxymethylcytosine (5hmC), 5-formylcytosine (5fC) and 5-carboxylcytosine (5caC) as well as detection of N6-methyladenine (6mA) in the DNA of multicellular organisms provided additional degrees of complexity to the epigenetic research. According to a growing body of experimental evidence, these novel DNA modifications may play specific roles in different cellular and developmental processes...
September 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28930978/influenza-a-virus-studies-in-a-mouse-model-of-infection
#20
Laura Rodriguez, Aitor Nogales, Luis Martínez-Sobrido
Influenza viruses cause over 500,000 deaths worldwide(1) and are associated with an annual cost of 12 - 14 billion USD in the United States alone considering direct medical and hospitalization expenses and work absenteeism(2). Animal models are crucial in Influenza A virus (IAV) studies to evaluate viral pathogenesis, host-pathogen interactions, immune responses, and the efficacy of current and/or novel vaccine approaches as well as antivirals. Mice are an advantageous small animal model because their immune system is evolutionarily similar to that found in humans, they are available from commercial vendors as genetically identical subjects, there are multiple strains that can be exploited to evaluate the genetic basis of infections, and they are relatively inexpensive and easy to manipulate...
September 7, 2017: Journal of Visualized Experiments: JoVE
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