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https://www.readbyqxmd.com/read/28927210/navigation-and-image-injection-for-control-of-bone-removal-and-osteotomy-planes-in-spine-surgery
#1
Michael Kosterhon, Angelika Gutenberg, Sven Rainer Kantelhardt, Elefterios Archavlis, Alf Giese
BACKGROUND AND IMPORTANCE: In contrast to cranial interventions, neuronavigation in spinal surgery is used in few applications, not tapping into its full technological potential. We have developed a method to preoperatively create virtual resection planes and volumes for spinal osteotomies and export 3-D operation plans to a navigation system controlling intraoperative visualization using a surgical microscope's head-up display. The method was developed using a Sawbone ® model of the lumbar spine, demonstrating feasibility with high precision...
April 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28926933/itraq-based-quantitative-proteomic-analysis-reveals-cold-responsive-proteins-involved-in-leaf-senescence-in-upland-cotton-gossypium-hirsutum-l
#2
Xuewei Zheng, Shuli Fan, Hengling Wei, Chengcheng Tao, Qiang Ma, Qifeng Ma, Siping Zhang, Hongbin Li, Chaoyou Pang, Shuxun Yu
Premature leaf senescence occurs in the ultimate phase of the plant, and it occurs through a complex series of actions regulated by stress, hormones and genes. In this study, a proteomic analysis was performed to analyze the factors that could induce premature leaf senescence in two cotton cultivars. We successfully identified 443 differential abundant proteins (DAPs) from 7388 high-confidence proteins at four stages between non-premature senescence (NS) and premature senescence (PS), among which 158 proteins were over-accumulated, 238 proteins were down-accumulated at four stages, and 47 proteins displayed overlapped accumulation...
September 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28926756/warfarin-inhibits-allosterically-the-reductive-nitrosylation-of-ferric-human-serum-heme-albumin
#3
Paolo Ascenzi, Alessio Bocedi, Magda Gioia, Gabriella Fanali, Mauro Fasano, Massimo Coletta
Human serum heme-albumin (HSA-heme-Fe) displays heme-based ligand binding and (pseudo-)enzymatic properties. Here, the effect of the prototypical drug warfarin on kinetics and thermodynamics of NO binding to ferric and ferrous HSA-heme-Fe (HSA-heme-Fe(III) and HSA-heme-Fe(II), respectively) and on the NO-mediated reductive nitrosylation of the heme-Fe atom is reported; data were obtained between pH5.5 and 9.5 at 20.0°C. Since warfarin is a common drug, its effect on the reactivity of HSA-heme-Fe represents a relevant issue in the pharmacological therapy management...
September 5, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28926617/hidden-biodiversity-in-entomological-collections-the-overlooked-co-occurrence-of-dipteran-and-hymenopteran-ant-parasitoids-in-stored-biological-material
#4
Gabriela Pérez-Lachaud, Jean-Paul Lachaud
Biological collections around the world are the repository of biodiversity on Earth; they also hold a large quantity of unsorted, unidentified, or misidentified material and can house behavioral information on species that are difficult to access or no longer available to science. Among the unsorted, alcohol-preserved material stored in the Formicidae Collection of the 'El Colegio de la Frontera Sur' Research Center (Chetumal, Mexico), we found nine colonies of the ponerine ant Neoponera villosa, that had been collected in bromeliads at Calakmul (Campeche, Mexico) in 1999...
2017: PloS One
https://www.readbyqxmd.com/read/28926237/a-bis-benzopyrroloisoquinoline-alkaloid-incorporating-a-cyclobutane-core-and-a-chlorophenanthroindolizidine-alkaloid-with-cytotoxic-activity-from-ficus-fistulosa-var-tengerensis
#5
Amjad Ayad Qatran Al-Khdhairawi, Premanand Krishnan, Chun-Wai Mai, Felicia Fei-Lei Chung, Chee-Onn Leong, Kien-Thai Yong, Kam-Weng Chong, Yun-Yee Low, Toh-Seok Kam, Kuan-Hon Lim
Tengerensine (1), isolated as a racemate and constituted from a pair of bis-benzopyrroloisoquinoline enantiomers, and tengechlorenine (2), purified as a scalemic mixture and constituted from a pair of chlorinated phenanthroindolizidine enantiomers, were isolated from the leaves of Ficus fistulosa var. tengerensis, along with three other known alkaloids. The structures of 1 and 2 were determined by spectroscopic data interpretation and X-ray diffraction analysis. The enantiomers of 1 were separated by chiral-phase HPLC, and the absolute configurations of (+)-1 and (-)-1 were established via experimental and calculated ECD data...
September 19, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28926198/serum-free-human-msc-medium-supports-consistency-in-human-but-not-in-equine-adipose-derived-multipotent-mesenchymal-stromal-cell-culture
#6
Susanna Schubert, Walter Brehm, Aline Hillmann, Janina Burk
For clinical applications of multipotent mesenchymal stromal cells (MSCs), serum-free culture is preferable to standardize cell products and prevent contamination with pathogens. In contrast to human MSCs, knowledge on serum-free culture of large animal MSCs is limited, despite its relevance for preclinical studies and development of veterinary cellular therapeutics. This study aimed to evaluate the suitability of a commercially available serum-free human MSC medium for culturing equine adipose-derived MSCs in comparison with human adipose MSCs...
September 19, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28925790/morphological-variation-of-the-caudal-fossa-of-domestic-cat-skulls-assessed-with-computed-tomography-and-geometric-morphometrics-analysis
#7
Caroline R Gordon, Thomas W Marchant, Joanna Lodzinska, Jeffery J Schoenebeck, Tobias Schwarz
Objectives This study aimed to investigate differences and demonstrate a normal range of morphological variation of the caudal fossa of the cranium of domestic cats. Methods CT scans of 32 domestic cat heads of 11 breeds were included. Isosurfaces from skulls were characterised through three-dimensional geometric morphometrics using geographical landmarks placed on the internal surface of the caudal fossa and foramen magnum. Raw data was transformed with a Procrustes fit and coordinate covariance was analysed by principal components to establish breed- and sex-level differences...
September 1, 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28924629/a-psma-ligand-labeled-with-cobalt-55-for-pet-imaging-of-prostate-cancer
#8
Johan Hygum Dam, Birgitte Brinkmann Olsen, Christina Baun, Poul Flemming Høilund-Carlsen, Helge Thisgaard
PURPOSE: Prostate-specific membrane antigen (PSMA) comprises a recognized target for molecular imaging of prostate cancer. As such, radiolabeled PSMA inhibitors are of great value for diagnosis and staging of this disease. Herein, we disclose the preclinical characterization of [(55)Co]PSMA-617 for positron emission tomography (PET)/x-ray computed tomography (CT) imaging of prostate cancer lesions. PROCEDURES: By the application of microwave heating, PSMA-617 in acetate buffer (0...
September 18, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28924618/optical-studies-of-the-solution-phase-reduction-and-stabilization-of-indigo-tetrasulfonate-in-polyelectrolyte-complexes
#9
Becca Hoene, Dion Rivera
Ultraviolet-visible (UV-vis) and fluorescence spectroscopy have been used to characterize the polyelectrolyte complexes (PECs) formed when potassium indigo tetrasulfonate (ITS) interacts with poly diallydimethylammonium chloride (PDADMAC) through columbic attraction in the presence of the reducing agent sodium bisulfite, NaHSO3. The PDADMAC facilitates both the reduction of the ITS and the stabilization of the reduced state of the ITS in an atmospheric oxygen environment. Dilutions of the dye solution show that the PEC is stable to dilutions of at least 1 to 1000...
September 2017: Heliyon
https://www.readbyqxmd.com/read/28924356/reproducibility-of-schatzker-classification-through-smartphone-applications
#10
Mauro Rodrigues Dos Santos, Junichiro Sado, Roberto Medeiros de Sousa, Osman Rodrigues Roriz
OBJECTIVE: To evaluate the intra-observer reproducibility of Schatzker classification for tibial plateau fractures through smartphone applications. METHODS: Radiographs were evaluated in two incidences (anteroposterior and profile) and CT slices (axial, sagittal and coronal) of 37 patients with tibial plateau fracture. Two evaluators, knee surgery experts, classified the cases by viewing the images of the isolated radiographs and then X-rays associated with CT slices in four different stages via smartphones and then presential assessment...
November 2016: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28924081/comparative-antileukemic-activity-of-a-tetranorditerpene-isolated-from-polyalthia-longifolia-leaves-and-the-derivative-against-human-leukemia-hl-60-cells
#11
Saheed Afolabi, Olufunke Olorundare, Masayuki Ninomiya, Abiola Babatunde, Hasan Mukhtar, Mamoru Koketsu
The discovery of potent cytotoxic isolates from botanicals provides an opportunity to explore this viable tool for cancer chemoprevention. The antileukemic potential of clerodane diterpene from Polyalthia longifolia leaves has already been established. However, in this present study, utilizing chromatographic techniques we report for the first time, the isolation of a rare tetranorditerpene (compound 1) from P. longifolia. The structure of compound 1 was elucidated and confirmed by spectrophotometric data. UPLC-MS analysis was conducted on the methanolic extract, ethyl acetate fraction, and isolated tetranorditerpene showed that the tetranorditerpene is one of the major constituents of the plant with a retention time of 30...
September 15, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28924033/rgpf-is-required-for-maintenance-of-stress-tolerance-and-virulence-in-streptococcus-mutans
#12
C J Kovacs, R C Faustoferri, R G Quivey
Bacterial cell wall dynamics have been implicated as important determinants of cellular physiology, stress tolerance and virulence. In Streptococcus mutans, the cell wall is composed primarily of a rhamnose-glucose polysaccharide (RGP) linked to the peptidoglycan. Despite extensive studies describing its formation and composition, the potential roles for RGP in S. mutans biology have not been well investigated. The present study characterizes the impact of RGP disruption as a result of deletion of rgpF, the gene encoding a rhamnosyltransferase involved in construction of the core poly-rhamnose backbone of RGP...
September 18, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28923610/attitudes-of-the-third-year-nursing-students-toward-organ-donation-%C3%A2-cross-sectional-study
#13
B Akpınar Söylemez, Y S Ordin
BACKGROUND: Health professionals can affect attitudes toward organ donation in society; therefore, priority should be given to exploration of attitudes of nursing students as important prospective members of the health profession. The goal of this study was to assess nursing students' attitudes and volunteerism toward organ donation. METHODS: This descriptive study was performed on 240 third-year nursing students in Turkey between February 2016 and April 2016. Purposive sampling and a cross-sectional survey were used...
October 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28923567/a-water-soluble-polysaccharide-from-the-roots-of-polygala-tenuifolia-suppresses-ovarian-tumor-growth-and-angiogenesis-in-vivo
#14
Hua Yao, Ping Cui, Dan Xu, Yunduo Liu, Qinghua Tian, Fubin Zhang
PTP, one polysaccharide extracted from the roots of Polygala tenuifolia, has displayed anti-cancer activity in several types of ovarian cancer cells. This study aims to elucidate the structure of PTP and investigate its anticancer effects against SKOV3 xenograft tumor growth in BALB/c mice, as well as the underlying mechanisms involved. GC-MS and NMR data indicate that PTP has a backbone composed of 1,4,6-linked-β-Galp, 1,4-linked-β-Galp and 1,4-linked-β-Glcp, with non-reducing terminal 1-linked-α-Glcp attached to O-6 of 1,4,6-linked-β-Galp...
September 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28923561/update-on-the-safety-of-phosphodiesterase-type-5-inhibitors-for-the-treatment-of-erectile-dysfunction
#15
REVIEW
Faysal A Yafi, Ira D Sharlip, Edgardo F Becher
INTRODUCTION: Phosphodiesterase type 5 inhibitors (PDE5Is) have demonstrated efficacy in the treatment of erectile dysfunction (ED). Although historically found to have limited drug-related adverse events, emerging data have suggested that PDE5Is might be associated with melanoma or recurrence of prostate cancer after radical prostatectomy. AIM: To summarize the literature on the safety of PDE5Is. METHODS: A literature review was performed through PubMed from 1990 through 2016 regarding ED...
September 8, 2017: Sexual Medicine Reviews
https://www.readbyqxmd.com/read/28922993/an-exploratory-tms-study-on-prefrontal-lateralization-in-valence-categorization-of-facial-expressions
#16
Chiara Ferrari, Lucile Gamond, Marcello Gallucci, Tomaso Vecchi, Zaira Cattaneo
Converging neuroimaging and patient data suggest that the dorsolateral prefrontal cortex (DLPFC) is involved in emotional processing. However, it is still not clear whether the DLPFC in the left and right hemisphere is differentially involved in emotion recognition depending on the emotion considered. Here we used transcranial magnetic stimulation (TMS) to shed light on the possible causal role of the left and right DLPFC in encoding valence of positive and negative emotional facial expressions. Participants were required to indicate whether a series of faces displayed a positive or negative expression, while TMS was delivered over the right DLPFC, the left DLPFC, and a control site (vertex)...
July 2017: Experimental Psychology
https://www.readbyqxmd.com/read/28922874/noninvasive-transfontanelle-monitoring-of-the-intracerebral-pressure-in-comparison-with-an-invasive-intradural-intracranial-pressure-device-a-prospective-study
#17
Bedjan Behmanesh, Marco Bartels, Florian Gessler, Natalie Filmann, Volker Seifert, Matthias Setzer, Thomas M Freiman
BACKGROUND: We previously introduced a novel noninvasive technique of intracranial pressure (ICP) monitoring in children with open fontanelles. OBJECTIVE: To compare the ICP obtained by our new technique to the ICP derived from an intradurally implanted ICP measurement device (external ventricular drain, subdural ICP device). METHODS: Children with open fontanelles and need of intracranial monitoring were included in this study. A standard ICP probe was placed upon the frontal fontanelle and data were compared with the values recorded by an already invasively implanted subdural ICP technique...
October 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28922497/mutual-independence-of-alkaline-and-calcium-mediated-signalling-in-aspergillus-fumigatus-refutes-the-existence-of-a-conserved-druggable-signalling-nexus
#18
Omar Loss, Margherita Bertuzzi, Yu Yan, Natalie Fedorova, Bethany L McCann, Darius Armstrong-James, Eduardo A Espeso, Nick D Read, William C Nierman, Elaine M Bignell
Functional coupling of calcium- and alkaline responsive signalling occurs in multiple fungi to afford efficient cation homeostasis. Host microenvironments exert alkaline stress and potentially toxic concentrations of Ca(2+) , such that highly conserved regulators of both calcium- (Crz) and pH- (PacC/Rim) responsive signalling are crucial for fungal pathogenicity. Drugs targeting calcineurin are potent antifungal agents but also perturb human immunity thereby negating their use as anti-infectives, abrogation of alkaline signalling has therefore been postulated as an adjunctive antifungal strategy...
September 18, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28922428/diminished-neutrophil-extracellular-trap-net-formation-is-a-novel-innate-immune-deficiency-induced-by-acute-ethanol-exposure-in-polymicrobial-sepsis-which-can-be-rescued-by-cxcl1
#19
Liliang Jin, Sanjay Batra, Samithamby Jeyaseelan
Polymicrobial sepsis is the result of an exaggerated host immune response to bacterial pathogens. Animal models and human studies demonstrate that acute alcohol intoxication is a key risk factor for sepsis-induced mortality. Multiple chemokines, such as CXCL1, CXCL2 and CXCL5 are critical for neutrophil recruitment and proper function of neutrophils. However, it is not quite clear the mechanisms by which acute alcohol suppresses immune responses and whether alcohol-induced immunosuppression can be rescued by chemokines...
September 18, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28922086/assessment-of-ah-receptor-transcriptional-activity-mediated-by-halogenated-dibenzo-p-dioxins-and-dibenzofurans-pxdd-fs-in-human-and-mouse-cell-systems
#20
Kari L Organtini, Troy D Hubbard, Gary H Perdew, Frank L Dorman
Polybrominated and mixed bromo/chloro dibenzo-p-dioxins and dibenzofurans (PXDD/Fs) are emerging environmental contaminants of concern. Thus far, an understanding of the toxicological behavior of these chemical species and their impact upon human health is incomplete. Here we utilized human and mouse hepatocellular carcinoma cell lines to examine the ability of differentially halogenated PXDD/F congeners to induce aryl hydrocarbon receptor (AHR)-mediated transcriptional activity. Dose-response experiments in reporter cell lines identified varied potencies among differentially halogenated PXDD/F isomers by comparison of EC50 values relative to the prototypical AHR agonist, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)...
September 18, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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