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https://www.readbyqxmd.com/read/28109103/-value-of-diffusion-weighted-imaging-1-h-magnetic-resonance-spectroscopy-and-3d-whole-brain-arterial-spin-labeling-in-the-diagnosis-of-medulloblastoma
#1
Dong-Liang Cheng, Wen-Sheng Wang, Yi-Xin Hu, Meng-Lin Chen, Ge Wen, Li-Na Cheng, Jing Wu, Liu-Qing Yan
OBJECTIVE: To explore the value of diffusion-weighted imaging (DWI), (1)H-magnetic resonance spectroscopy (1H-MRS) and 3D whole-brain arterial spin labeling (3D ASL) in the diagnosis of medulloblastoma in the posterior cranial fossa. METHODS: The magnetic resonance imaging (MRI) findings of 16 patients with pathologically confirmed medulloblastoma in the posterior cranial fossa were analyzed retrospectively. All the patients were examined with plane and enhanced brain MRI scans; 5 patients also underwent examinations with DWI, 12 with MRS, and 5 with 3D ASL...
January 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28109047/novel-antiplatelet-role-for-a-protein-disulfide-isomerase-targeted-peptide-evidence-of-covalent-binding-to-c-terminal-cghc-redox-motif
#2
H R Sousa, R S Gaspar, E M L Sena, S A da Silva, J L de L Fontelles, T L S Araújo, M Mastrogiovanni, D M Fries, A P S Azevedo-Santos, F R M Laurindo, A Trostchansky, A M Paes
Protein disulfide isomerase (PDI) plays a major role in platelet aggregation and its inhibitors have emerged as novel antithrombotic drugs. In previous work, we designed a peptide based on PDI redox motif (CGHC) that inhibited both PDI reductase activity and PDI-modulated superoxide generation by neutrophil Nox2. Thus, we hypothesized this peptide would also inhibit platelet aggregation by association to surface PDI. Three peptides were used: CxxC, containing the PDI redox motif; Scr, presenting a scrambled sequence of the same residues and AxxA, with cysteines replaced by alanine...
January 21, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28109035/competitive-benzyl-cation-transfer-proton-transfer-collision-induced-mass-spectrometric-fragmentation-of-protonated-n-n-dibenzylaniline
#3
Ge Ma, Gongye Liu, Shanshan Shen, Yunfeng Chai, Lei Yue, Shunping Zhao, Yuanjiang Pan
Collision-induced dissociation of protonated N,N-dibenzylaniline was investigated by electrospray tandem mass spectrometry. Various fragmentation pathways were dominated by benzyl cation and proton transfer. Benzyl cation transfers from the initial site (nitrogen) to benzylic phenyl or aniline phenyl ring. The benzyl cations transfer to the two different sites and both result in the benzene loss combined with 1,3-H shift. In addition, after the benzyl cation transfers to the benzylic phenyl ring, 1,2-H shift and 1,4-H shift proceed competitively to trigger the diphenylmethane loss and aniline loss respectively...
January 21, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28108978/treatment-of-complicated-urinary-tract-infection-and-acute-pyelonephritis-by-short-course-intravenous-levofloxacin-750%C3%A2-mg-day-or-conventional-intravenous-oral-levofloxacin-500%C3%A2-mg-day-prospective-open-label-randomized-controlled-multicenter-non-inferiority
#4
Hong Ren, Xiao Li, Zhao-Hui Ni, Jian-Ying Niu, Bin Cao, Jie Xu, Hong Cheng, Xiao-Wen Tu, Ai-Min Ren, Ying Hu, Chang-Ying Xing, Ying-Hong Liu, Yan-Feng Li, Jun Cen, Rong Zhou, Xu-Dong Xu, Xiao-Hui Qiu, Nan Chen
OBJECTIVE: To compare the efficacy and safety of short-course intravenous levofloxacin (LVFX) 750 mg with a conventional intravenous/oral regimen of LVFX 500 mg in patients from China with complicated urinary tract infections (cUTIs) and acute pyelonephritis (APN). METHODS: This was a prospective, open-label, randomized, controlled, multicenter, non-inferiority clinical trial. Patients with cUTI and APN were randomly assigned to a short-course therapy group (intravenous LVFX at750 mg/day for 5 days) or a conventional therapy group (intravenous/oral regimen of LVFX at 500 mg/day for 7-14 days)...
January 20, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28108956/post-implantation-fate-of-adipogenic-induced-mesenchymal-stem-cells-on-type-i-collagen-scaffold-in-a-rat-model
#5
Balu Venugopal, Francis B Fernandez, V S Harikrishnan, Annie John
Regenerative medicine via its application in soft tissue reconstruction through novel methods in adipose tissue engineering (ATE) has gained remarkable attention and investment despite simultaneous reports on clinical incidence of graft resorption and impaired vascularization. The underlying malaise here once identified may play a critical role in optimizing implant function. Our work attempts to determine the fate of donor cells and the implant in recipient micro environment using adipose-derived mesenchymal stem cells (ASCs) on a type I collagen sponge, an established scaffold for ATE...
February 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28108917/quantitative-proteomics-analysis-reveals-the-tolerance-of-mirabilis-jalapa-l-to-petroleum-contamination
#6
Shuisen Chen, Hui Ma, Zhifu Guo, Yaping Feng, Jingwei Lin, Menghua Zhang, Ming Zhong
Petroleum is not only an important energy resource but is also a major soil pollutant. To gain better insight into the adaptability mechanism of Mirabilis jalapa to petroleum-contaminated soil, the protein profiles of M. jalapa root were investigated using label-free quantitative proteomics technique. After exposing to petroleum-contaminated soil for 24 h, 34 proteins significantly changed their protein abundance and most of the proteins increased in protein abundance (91.18%). Combined with gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses as well as data from previous studies, our results revealed that M...
January 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28108754/using-fluorescence-immunochromatographic-test-strips-based-on-quantum-dots-for-the-rapid-and-sensitive-determination-of-microcystin-lr
#7
Jiadi Sun, Ying Li, Fuwei Pi, Jian Ji, Yinzhi Zhang, Xiulan Sun
A novel immunosensor for the detection of microcystin-LR (MC-LR) was constructed with use of immunochromatographic test strips (ICTS). Quantum dots were chosen to be the fluorescent labels for the immune sensor in ICTS because of their excellent optical and electronic properties with a relatively narrow emission spectrum. The detection sensitivity of the ICTS was related to the concentration of the fluorescent probe and the amount of the MC-LR standards. Under optimal conditions, with MC-LR as the target, the ICTS sensor had a linear range from 0...
January 20, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28108663/determination-of-the-conformational-ensemble-of-the-tar-rna-by-x-ray-scattering-interferometry
#8
Xuesong Shi, Peter Walker, Pehr B Harbury, Daniel Herschlag
The conformational ensembles of structured RNA's are crucial for biological function, but they remain difficult to elucidate experimentally. We demonstrate with HIV-1 TAR RNA that X-ray scattering interferometry (XSI) can be used to determine RNA conformational ensembles. X-ray scattering interferometry (XSI) is based on site-specifically labeling RNA with pairs of heavy atom probes, and precisely measuring the distribution of inter-probe distances that arise from a heterogeneous mixture of RNA solution structures...
January 20, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28108641/spinal-cord-stimulation-scs-with-anatomically-guided-3d-neural-targeting-shows-superior-chronic-axial-low-back-pain-relief-compared-to-traditional-scs-lumina-study
#9
Elias Veizi, Salim M Hayek, James North, T Brent Chafin, Thomas L Yearwood, Louis Raso, Robert Frey, Kevin Cairns, Anthony Berg, John Brendel, Nameer Haider, Matthew McCarty, Henry Vucetic, Alden Sherman, Lilly Chen, Nitzan Mekel-Bobrov
: BACKGROUND : The aim of this study was to determine whether spinal cord stimulation (SCS) using 3D neural targeting provided sustained overall and low back pain relief in a broad routine clinical practice population. STUDY DESIGN AND METHODS:  This was a multicenter, open-label observational study with an observational arm and retrospective analysis of a matched cohort. After IPG implantation, programming was done using a patient-specific, model-based algorithm to adjust for lead position (3D neural targeting) or previous generation software (traditional)...
January 20, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28108553/the-bright-fluorescent-protein-mneongreen-facilitates-protein-expression-analysis-in-vivo
#10
Lola Hostettler, Laura Grundy, Stéphanie Käser-Pébernard, Chantal Wicky, William R Schafer, Dominique A Glauser
The Green Fluorescent Protein (GFP) has been tremendously useful to investigate cell architecture, protein localization, and protein function. While recent developments in transgenesis and genome editing methods enable working with few transgene copies and, consequently, with physiological expression levels, lower signal intensity might become a limiting factor. The recently developed mNeonGreen protein is a brighter alternative to GFP in vitro The goal of the present study was to determine how mNeonGreen performs in vivo in Caenorhabditis elegans, a model extensively used for fluorescence imaging in intact animals...
January 20, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28108422/role-of-microglia-autophagy-in-microglia-activation-after-traumatic-brain-injury
#11
Yichao Jin, Ran Wang, Shaofeng Yang, Xiaohua Zhang, Jiong Dai
OBJECTIVE: Role of microglia autophagy in microglia activation after traumatic brain injury (TBI) remains elusive. Here, we evaluated role of microglia autophagy in microglia activation after traumatic brain injury (TBI) in rats. METHODS: TBI was induced by a fluid percussion TBI device. All rats were killed at 24 h after TBI. The ipsilateral hippocampus in all rats was analyzed with hematoxylin and eosin staining; Immunohistochemistry and western blotting of IBA-1 was used to determine the changes of microglia activation; Double staining of microtubule-associated protein light chain 3 (LC-3), Beclin-1 and IBA-1 was used to assess the changes of microglia autophagy; enzyme-linked immunosorbent assay (ELISA) of tumor necrosis factor receptor-alpha (TNF-α) and interleukin-1β (IL-1β) was used to evaluate the changes of inflammatory responses; terminal deoxynucleoitidyl transferase mediated nick end labeling staining (TUNEL) was used to determine cell death in ipsilateral hippocampus...
January 17, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28108396/serotonin-5-ht4-receptors-modulate-the-development-of-glutamatergic-input-to-the-dorsal-raphe-nucleus
#12
Angela Chen, Katherine D Hubbert, Pasha F Foroudi, Vivian F Lu, Skirmantas Janušonis
The dorsal raphe nucleus (DRN) is a major serotonin (5-hydroxytryptamine, 5-HT)-producing region in the central nervous system. It receives glutamatergic inputs from several brain regions, which are reciprocally modulated by serotonergic signals. We investigated whether serotonin 5-HT4 receptors (5-HT4Rs) play a role in the development of glutamatergic control of the DRN, with an emphasis on cortical inputs. Double-label immunohistochemistry and confocal microscopy were used to quantify vesicular glutamate transporter 1 (vGluT1)-immunoreactive terminals in the DRN of mice with a null-mutation in the 5-HT4R gene...
January 17, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28108369/jaburetox-affects-gene-expression-and-enzyme-activities-in-rhodnius-prolixus-a-chagas-disease-vector
#13
Leonardo L Fruttero, Natalia R Moyetta, Monique Siebra Krug, Valquiria Broll, Matheus V Coste Grahl, Rafael Real-Guerra, Fernanda Stanisçuaski, Celia R Carlini
Jaburetox, a recombinant peptide of ∼11kDa derived from one of the Canavalia ensiformis (Jack Bean) urease isoforms, is toxic and lethal to insects belonging to different orders when administered orally or via injection. Previous findings indicated that Jaburetox acts on insects in a complex fashion, inhibiting diuresis and the transmembrane potential of Malpighian tubules, interfering with muscle contractility and affecting the immune system. In vitro, Jaburetox forms ionic channels and alters permeability of artificial lipid membranes...
January 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28108256/a-quantitative-evaluation-of-a-2-5-kb-rat-tyrosine-hydroxylase-promoter-to-target-expression-in-ventral-mesencephalic-dopamine-neurons-in-vivo
#14
Anne-Sophie Rolland, Tatyana Kareva, Nikolai Kholodilov, Robert E Burke
Adeno-associated viruses (AAVs) have become powerful tools in neuroscience for both basic research and potential therapeutic use. They have become especially important tools for optogenetic experiments based on their ability to achieve transgene expression in postmitotic neurons with regional selectivity. With the use of appropriate promoter elements they can achieve cellular specificity as well. One population of neurons that plays a central role in human neurodegenerative and psychiatric diseases are the dopamine neurons of the midbrain...
January 17, 2017: Neuroscience
https://www.readbyqxmd.com/read/28108224/effectiveness-of-monotherapy-and-combined-therapy-with-calcitonin-and-minodronic-acid-hydrate-a-bisphosphonate-for-early-treatment-in-patients-with-new-vertebral-fractures-an-open-label-randomized-parallel-group-study
#15
Shinya Tanaka, Akira Yoshida, Shinjiro Kono, Manabu Ito
BACKGROUND: Evidence related to the effectiveness of combination drug therapy for the treatment of osteoporosis is currently considered insufficient. Therefore, this study was performed to clarify the effects of monotherapy, and combination therapy, with a bisphosphonate (minodronic acid hydrate), a bone resorption inhibitor, and calcitonin (elcatonin), which is effective for the alleviation of pain due to vertebral fractures in osteoporotic patients. METHODS: Study participants comprised of 51 female subjects with post-menopausal osteoporosis, whose main complaint was acute lower back pain caused by vertebral fractures...
January 18, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28108164/assessment-of-co-benefits-of-vehicle-emission-reduction-measures-for-2015-2020-in-the-pearl-river-delta-region-china
#16
Yong-Hong Liu, Wen-Yuan Liao, Xiao-Fang Lin, Li Li, Xue-Lan Zeng
Vehicle emissions have become one of the key factors affecting the urban air quality and climate change in the Pearl River Delta (PRD) region, so it is important to design policies of emission reduction based on quantitative Co-benefits for air pollutants and greenhouse gas (GHG). Emissions of air pollutants and GHG by 2020 was predicted firstly based on the no-control scenario, and five vehicle emissions reduction scenarios were designed in view of the economy, technology and policy, whose emissions reduction were calculated...
January 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28108080/prediction-of-gradient-retention-data-for-hydrophilic-interaction-liquid-chromatographic-separation-of-native-and-fluorescently-labeled-oligosaccharides
#17
Nikola Vaňková, Petr Česla
In this work, we have investigated the predictive properties of mixed-mode retention model and oligomeric mixed-mode model, taking into account the contribution of monomeric units to the retention, in hydrophilic interaction liquid chromatography. The gradient retention times of native maltooligosaccharides and their fluorescent derivatives were predicted in the oligomeric series with number of monomeric glucose units in the range from two to seven. The maltooligosaccharides were separated on a packed column with carbamoyl-bonded silica stationary phase and 15 gradient profiles with different initial and final mobile phase composition were used with the gradient times 5; 7...
January 16, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28107998/multiplex-and-accurate-quantification-of-acute-kidney-injury-biomarker-candidates-in-urine-using-protein-standard-absolute-quantification-psaq-and-targeted-proteomics
#18
Benoît Gilquin, Mathilde Louwagie, Michel Jaquinod, Alexandre Cez, Guillaume Picard, Leila El Kholy, Brigitte Surin, Jérôme Garin, Myriam Ferro, Thomas Kofman, Caroline Barau, Emmanuelle Plaisier, Pierre Ronco, Virginie Brun
There is a need for multiplex, specific and quantitative methods to speed-up the development of acute kidney injury biomarkers and allow a more specific diagnosis. Targeted proteomic analysis combined with stable isotope dilution has recently emerged as a powerful option for the parallelized evaluation of candidate biomarkers. This article presents the development of a targeted proteomic assay to quantify 4 acute kidney injury biomarker candidates in urine samples. The proteins included in the assessed panel consisted of myo-inositol oxygenase (MIOX), phosphoenolpyruvate carboxykinase 1 (PCK1), neutrophil gelatinase-associated lipocalin (NGAL) and liver fatty acid-binding protein (L-FABP)...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107980/lab-on-chip-for-liquid-biopsy-loc-lb-based-on-dielectrophoresis
#19
Bobby Mathew, Anas Alazzam, Saud Khashan, Mohammad Abutayeh
This short communication presents the proof-of-concept of a novel dielectrophoretic lab-on-chip for identifying/separating circulating tumor cells for purposes of liquid biopsy. The device consists of a polydimethylsiloxane layer, containing a microchannel, bonded on a glass substrate that holds two sets of planar interdigitated transducer electrodes. The lab-on-chip is operated at a frequency that enables dielectrophoretic force to sort cells, based on type, along the lateral direction. The operating frequency ensures attraction force toward the electrodes on cancer cells and repulsion force toward the center of the microchannel on other cells...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107962/a-label-free-electrochemical-immunosensor-based-on-a-new-polymer-containing-aldehyde-and-ferrocene-groups
#20
Xiangyang Zhang, Youming Shen, Youyu Zhang, Guangyu Shen, Haiyan Xiang, Xiaofeng Long
In this work, a novel and convenient strategy for synthesis of a well-defined polymer containing both aldehyde and ferrocene functional groups by grafting 4-hydroxybenzaldehyde and ferrocenecarboxylhydrazide onto linear poly (vinylbenzyl chloride) was developed. The designed polymer film (polymer CAF) could be used as a new support matrix for fabrication of a label-free electrochemical immunosensor with high sensitivity, good stability and repeatability. With human IgG as an analyte model, the proposed electrochemical immunosensor showed a linear concentration range from 0...
March 1, 2017: Talanta
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