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https://www.readbyqxmd.com/read/28210881/comprehensive-genomic-profiling-of-malignant-phyllodes-tumors-of-the-breast
#1
Sahar Nozad, Christine E Sheehan, Laurie M Gay, Julia A Elvin, Jo-Anne Vergilio, James Suh, Shakti Ramkissoon, Alexa B Schrock, Kim M Hirshfield, Nadia Ali, Shridar Ganesan, Siraj M Ali, Vincent A Miller, Philip J Stephens, Jeffrey S Ross, Jon H Chung
PURPOSE: Malignant phyllodes tumors (MPT) are exceptionally rare, and the genomic drivers of these tumors are still being elucidated. We performed comprehensive genomic profiling (CGP) of MPT to identify genomic alterations that will inform approaches to targeted therapy for patients with MPT, including relapsed, refractory, and metastatic disease. METHODS: DNA was extracted from formalin-fixed, paraffin-embedded samples from 24 consecutive patient cases of MPT...
February 17, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28194954/gecko-inspired-nanotentacle-surface-enhanced-raman-spectroscopy-substrate-for-sampling-and-reliable-detection-of-pesticide-residues-in-fruits-and-vegetables
#2
Pan Wang, Long Wu, Zhicheng Lu, Qin Li, Wenmin Yin, Fan Ding, Heyou Han
Rapid sampling and multicomponent detection are crucial for monitoring of pesticide residues analysis. Here, a gecko-inspired nanotentacle surface-enhanced Raman spectroscopy (G-SERS) platform is proposed for the first time for the simultaneous detection of three kinds of pesticides via a simple and intuitive "press and peeled-off" approach. The G-SERS platform obtained from seeding deposition of silver nanoparticles (Ag NPs) on 3D PDMS nanotentacle array is flexible and free-standing. Compared with other substrates, this G-SERS substrate can simultaneously provide outstanding SERS activity (enhancement factor = 1...
February 6, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28170236/protonation-and-sulfido-versus-oxo-ligation-changes-at-the-molybdenum-cofactor-in-xanthine-dehydrogenase-xdh-variants-studied-by-x-ray-absorption-spectroscopy
#3
Stefan Reschke, Stefan Mebs, Kajsa G V Sigfridsson-Clauss, Ramona Kositzki, Silke Leimkühler, Michael Haumann
Enzymes of the xanthine oxidase family are among the best characterized mononuclear molybdenum enzymes. Open questions about their mechanism of transfer of an oxygen atom to the substrate remain. The enzymes share a molybdenum cofactor (Moco) with the metal ion binding a molybdopterin (MPT) molecule via its dithiolene function and terminal sulfur and oxygen groups. For xanthine dehydrogenase (XDH) from the bacterium Rhodobacter capsulatus, we used X-ray absorption spectroscopy to determine the Mo site structure, its changes in a pH range of 5-10, and the influence of amino acids (Glu730 and Gln179) close to Moco in wild-type (WT), Q179A, and E730A variants, complemented by enzyme kinetics and quantum chemical studies...
February 7, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28162777/assumptions-behind-scoring-source-versus-item-memory-effects-of-age-hippocampal-lesions-and-mild-memory-problems
#4
Elisa Cooper, Andrea Greve, Richard N Henson
Source monitoring paradigms have been used to separate: 1) the probability of recognising an item (Item memory) and 2) the probability of remembering the context in which that item was previously encountered (Source memory), conditional on it being recognised. Multinomial Processing Tree (MPT) models are an effective way to estimate these conditional probabilities. Moreover, MPTs make explicit the assumptions behind different ways to parameterise Item and Source memory. Using data from six independent groups across two different paradigms, we show that one would draw different conclusions about the effects of age, age-related memory problems and hippocampal lesions on Item and Source memory, depending on the use of: 1) standard accuracy calculation vs MPT analysis, and 2) two different MPT models...
January 12, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28153981/does-the-membrane-pacemaker-theory-of-metabolism-explain-the-size-dependence-of-metabolic-rate-in-marine-mussels
#5
Alexey Sukhotin, Natalia Fokina, Tatiana Ruokolainen, Christian Bock, Hans-Otto Pörtner, Gisela Lannig
According to the Membrane Pacemaker Theory of metabolism (MPT) allometric scaling of metabolic rate in animals is determined by the composition of cellular and mitochondrial membranes that changes with body size in a predictable manner. MPT has been elaborated from interspecific comparisons in mammals. It projects that the degree of unsaturation of membrane phospholipids decreases in larger organisms, thereby lowering ion permeability of the membranes and making cellular and thus whole animal metabolism more efficient...
February 2, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28133923/a-comparative-study-of-ex-vivo-skin-optical-clearing-using-two-photon-microscopy
#6
Anton Sdobnov, Maxim E Darvin, Juergen Lademann, Valery Tuchin
Multiphoton tomography (MPT) is a prospective tool for imaging the skin structure. Aiming to increase the probing depth, a comparative ex vivo study of optical clearing of porcine ear skin was performed by using two optical clearing agents (OCAs), i.e., glycerol and iohexol (Omnipaque(TM) ) at different concentrations, which exhibit different osmotic properties. The results show that a topical application of glycerol or Omnipaque(TM) solutions onto the skin for 60 min significantly improved the depth and contrast of the MPT signals...
January 30, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28120059/minipterional-craniotomy-for-treatment-of-unruptured-middle-cerebral-artery-aneurysms-a-single-center-comparative-analysis-with-standard-pterional-approach-as-regard-to-safety-and-efficacy-of-aneurysm-clipping-and-the-advantages-of-reconstruction
#7
Carmelo Lucio Sturiale, Giuseppe La Rocca, Alfredo Puca, Eduardo Fernandez, Massimiliano Visocchi, Enrico Marchese, Giovanni Sabatino, Alessio Albanese
Pterional craniotomy (PT) has long been the standard approach for the treatment of middle cerebral artery (MCA) aneurysms, even though it may cause temporalis muscle atrophy, facial nerve injury, and masticatory difficulties. Minipterional craniotomy (MPT) is an alternative approach that may provide the same surgical corridor, limiting the risk of postoperative esthetic and functional complications. From January 2011 to December 2014 we consecutively performed 68 craniotomies for surgical treatment of unruptured MCA aneuryms: 37 were standard PT and 31 were MPT...
2017: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/28118671/mechanistic-approach-for-toxic-effects-of-bupropion-in-primary-rat-hepatocytes
#8
Elham Ahmadian, Hossein Babaei, Alireza Mohajjel Nayebi, Aziz Eftekhari, Mohammad Ali Eghbal
Bupropion is a widely prescribed antidepressant/smoke cessation drug. However, hepatotoxicity is one of its side effects reported in some recipients. The mechanisms by which bupropion induces hepatotoxicity is not clear yet. This experiment was intended to assess the cytotoxic mechanisms of bupropion toward primary rat hepatocytes. Additionally, the effect of α-tocopherol succinate (ALPHA-TOS) and N-acetyl cysteine (NAC) and mitochondrial permeability transition (MPT) pore sealing agent cyclosporine A (Cs A) on this toxicity was investigated...
January 24, 2017: Drug Research
https://www.readbyqxmd.com/read/28118417/pain-from-dental-implant-placement-inflammatory-pulpitis-pain-and-neuropathic-pain-present-different-somatosensory-profiles
#9
André Luís Porporatti, Leonardo Rigoldi Bonjardim, Juliana Stuginski-Barbosa, Estevam Augusto Bonfante, Yuri Martins Costa, Paulo César Rodrigues Conti
AIMS: To address the two following questions: (1) What kind of somatosensory abnormalities may be characterized in patients receiving dental implants (IMP), in ongoing inflammatory dental pulpitis (IP) patients, and in neuropathic pain (atypical odontalgia [AO]) patients? and (2) What sort of sensory and neural changes may result from dental implant placement surgery and pulpectomy? METHODS: A total of 60 subjects were divided into three groups: the IMP (n = 20), IP (n = 20), and AO groups (n = 20)...
January 2017: Journal of Oral & Facial Pain and Headache
https://www.readbyqxmd.com/read/28109286/acetaminophen-attenuates-lipopolysaccharide-induced-cognitive-impairment-through-antioxidant-activity
#10
Wei-Xing Zhao, Jun-Han Zhang, Jiang-Bei Cao, Wei Wang, Dong-Xin Wang, Xiao-Ying Zhang, Jun Yu, Yong-Yi Zhang, You-Zhi Zhang, Wei-Dong Mi
BACKGROUND: Considerable evidence has shown that neuroinflammation and oxidative stress play an important role in the pathophysiology of postoperative cognitive dysfunction (POCD) and other progressive neurodegenerative disorders. Increasing evidence suggests that acetaminophen (APAP) has unappreciated antioxidant and anti-inflammatory properties. However, the impact of APAP on the cognitive sequelae of inflammatory and oxidative stress is unknown. The objective of this study is to explore whether APAP could have neuroprotective effects on lipopolysaccharide (LPS)-induced cognitive impairment in mice...
January 21, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28106903/continuous-treatment-with-lenalidomide-and-low-dose-dexamethasone-in-transplant-ineligible-patients-with-newly-diagnosed-multiple-myeloma-in-asia-subanalysis-of-the-first-trial
#11
Jin Lu, Jae H Lee, Shang-Yi Huang, Lugui Qiu, Je-Jung Lee, Ting Liu, Sung-Soo Yoon, Kihyun Kim, Zhi X Shen, Hyeon S Eom, Wen M Chen, Chang K Min, Hyo J Kim, Jeong O Lee, Jae Y Kwak, Wai Yiu, Guang Chen, Annette Ervin-Haynes, Cyrille Hulin, Thierry Facon
The phase 3 FIRST (Frontline Investigation of REVLIMID + Dexamethasone Versus Standard Thalidomide) trial demonstrated that lenalidomide plus low-dose dexamethasone (Rd) until disease progression (Rd continuous) is an effective treatment option for transplant-ineligible patients with newly diagnosed multiple myeloma (NDMM). Given genetic differences between Asian and Western populations, this subanalysis of the FIRST trial examined the safety and efficacy of Rd (given continuously or for 18 cycles [Rd18]) and MPT (melphalan, prednisone, thalidomide) in 114 Asian patients from Mainland China, South Korea and Taiwan...
January 20, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28106324/verbal-instructions-influence-pain-thresholds-assessment-a-study-using-manual-and-electronic-mechanical-stimulators
#12
K Suzuki, L Baad-Hansen, P Svensson
BACKGROUND: Quantitative sensory testing (QST) relies on psychophysical techniques and instructions to test subjects. This study examined the effect of different verbal instructions for mechanical pain thresholds (MPTs) using two different stimulation techniques; weighted pinprick stimulators and an electronic von Frey device (EvF). The test-retest reliability and within session variability in the MPTs for each verbal instruction were compared in addition. METHODS: Sixteen healthy volunteers participated...
January 20, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28098827/shared-sulfur-mobilization-routes-for-trna-thiolation-and-molybdenum-cofactor-biosynthesis-in-prokaryotes-and-eukaryotes
#13
REVIEW
Silke Leimkühler, Martin Bühning, Lena Beilschmidt
Modifications of transfer RNA (tRNA) have been shown to play critical roles in the biogenesis, metabolism, structural stability and function of RNA molecules, and the specific modifications of nucleobases with sulfur atoms in tRNA are present in pro- and eukaryotes. Here, especially the thiomodifications xm⁵s²U at the wobble position 34 in tRNAs for Lys, Gln and Glu, were suggested to have an important role during the translation process by ensuring accurate deciphering of the genetic code and by stabilization of the tRNA structure...
January 14, 2017: Biomolecules
https://www.readbyqxmd.com/read/28093616/rare-germline-alterations-in-cancer-related-genes-associated-with-the-risk-of-multiple-primary-tumor-development
#14
Rolando A R Villacis, Tatiane R Basso, Luisa M Canto, Maísa Pinheiro, Karina M Santiago, Juliana Giacomazzi, Cláudia A A de Paula, Dirce M Carraro, Patrícia Ashton-Prolla, Maria I Achatz, Silvia R Rogatto
: Multiple primary tumors (MPT) have been described in carriers of inherited cancer predisposition genes. However, the genetic etiology of a large proportion of MPT cases remains unclear. We reviewed 267 patients with hereditary cancer predisposition syndromes (HCPS) that underwent genetic counseling and selected 22 patients with MPT to perform genomic analysis (CytoScan HD Array, Affymetrix) aiming to identify new alterations related to a high risk of developing MPT. Twenty patients had a positive family history of cancer and 11 met phenotypic criteria for HCPS...
January 16, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28092530/feasibility-of-multi-plane-transmit-beamforming-for-real-time-volumetric-cardiac-imaging-a-simulation-study
#15
Yinran Chen, Ling Tong, Alejandra Ortega, Jianwen Luo, Jan D'hooge
Today's three-dimensional (3-D) cardiac ultrasound imaging systems suffer from relatively low spatial and temporal resolution, limiting their applicability in daily clinical practice. To address this problem, 3-D diverging wave imaging with spatial coherent compounding (DWC) as well as 3-D multi-line-transmit (MLT) imaging have recently been proposed. Currently, the former improves the temporal resolution significantly at the expense of image quality and the risk of introducing motion artifacts whereas the latter only provides a moderate gain in volume rate but mostly preserves quality...
January 10, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28079362/intensive-study-on-the-catalytical-behavior-of-n-methylphenothiazine-as-a-soluble-mediator-to-oxidize-the-li2o2-cathode-of-the-li-o2-battery
#16
Ningning Feng, Xiaowei Mu, Xueping Zhang, Ping He, Haoshen Zhou
Aprotic Li-O2 batteries have attracted worldwide interest owing to their ultrahigh theoretical energy density. However, the practical Li-O2 batteries still suffer from high charge overpotential and low energy efficiency resulting from the sluggish kinetics in electrochemically oxidizing the insulating lithium peroxide (Li2O2). Recently, dissolved redox mediators in the electrolyte have enabled the effective catalytic oxidation of Li2O2 at the liquid-solid interface. Here, we report that the incorporation of N-methylphenothiazine (MPT), as a redox shuttle in Li-O2 batteries, provides a dramatic reduction in charge overpotential to 0...
February 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28078995/sphingolipids-in-genetic-and-acquired-forms-of-chronic-kidney-diseases
#17
Norishi Ueda
Sphingolipids (SLs) regulate apoptosis, proliferation, and stress response. SLs, including ceramide, glycosphingolipids (glucosylceramide, lactosylceramide, and gangliosides) and sphingosine-1-phosphate (S1P), play a role in the pathogenesis and progression of genetic (lysosomal storage disease, congenital nephrotic syndrome and polycystic kidney disease) and non-genetic forms of chronic kidney diseases (CKDs). SLs metabolism defects promote complications (cardiovascular events, etc.) via oxidant stress in CKDs...
January 12, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28068367/cell-surface-integrins-and-car-are-both-essential-for-adenovirus-type-5-transduction-of-canine-cells-of-lymphocytic-origin
#18
Payal Agarwal, Elizabeth A Gammon, Abdul Mohin Sajib, Maninder Sandey, Bruce F Smith
Adenoviruses are the most widely used vectors in cancer gene therapy. Adenoviruses vectors are well characterized and are easily manipulated. Adenovirus serotype 5 (Ad5) is the most commonly used human serotype. Ad5 internalization into host cells is a combined effect of binding of Ad5 fiber knob with the coxsackie virus and adenovirus receptor (CAR) and binding of RGD motifs in viral penton to cell surface integrins (αvβ3, αvβ5). Ad5's wide range of host-cell transduction and lack of integration into the host genome have made it an excellent choice for cancer therapeutics...
2017: PloS One
https://www.readbyqxmd.com/read/28060335/identification-of-intracellular-signaling-events-induced-in-viable-cells-by-interaction-with-neighboring-cells-undergoing-apoptotic-cell-death
#19
Snezana Vujicic, Lanfei Feng, Angelika Antoni, Joyce Rauch, Jerrold S Levine
Cells dying by apoptosis, also referred to as regulated cell death, acquire multiple new activities that enable them to influence the function of adjacent live cells. Vital activities, such as survival, proliferation, growth, and differentiation, are among the many cellular functions modulated by apoptotic cells. The ability to recognize and respond to apoptotic cells appears to be a universal feature of all cells, regardless of lineage or organ of origination. However, the diversity and complexity of the response to apoptotic cells mandates that great care be taken in dissecting the signaling events and pathways responsible for any particular outcome...
December 27, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28043587/cloning-expression-and-purification-of-recombinant-protein-mpt-64-from-a-virulent-strain-of-mycobacterium-bovis-in-a-prokaryotic-system
#20
Maryam Mohammadi Tashakkori, Majid Tebianian, Mohammad Tabatabaei, Nader Mosavari
OBJECTIVE: Tuberculosis (TB) is a zoonotic infectious disease common to humans and animals that is caused by the rod-shaped acid-fast bacterium Mycobacterium bovis. Rapid and sensitive detection of TB is promoted by specific antigens. Virulent strains of the TB complex from M. bovis contain 16 regions of difference (RD) in their genome that encode important proteins, including major protein of Mycobacterium Tuberculosis 64 (MBT-64, which is a primary immune-stimulating antigen encoded by RD-2...
December 2016: International Journal of Mycobacteriology
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