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https://www.readbyqxmd.com/read/28102835/spinal-cord-regeneration-in-xenopus-laevis
#1
Gabriela Edwards-Faret, Rosana Muñoz, Emilio E Méndez-Olivos, Dasfne Lee-Liu, Victor S Tapia, Juan Larraín
Here we present a protocol for the husbandry of Xenopus laevis tadpoles and froglets, and procedures to study spinal cord regeneration. This includes methods to induce spinal cord injury (SCI); DNA and morpholino electroporation for genetic studies; in vivo imaging for cell analysis; a swimming test to measure functional recovery; and a convenient model for screening for new compounds that promote neural regeneration. These protocols establish X. laevis as a unique model organism for understanding spinal cord regeneration by comparing regenerative and nonregenerative stages...
February 2017: Nature Protocols
https://www.readbyqxmd.com/read/28102712/bone-morphogenetic-protein-2-and-7-mediate-the-anabolic-function-of-nucleus-pulposus-cells-with-discrete-mechanisms
#2
Victor Yl Leung, Lixiong Zhou, Wai-Kit Tam, Yi Sun, Fengjuan Lv, Guangqian Zhou, Kenneth Mc Cheung
Bone morphogenetic proteins (BMPs) play roles in promoting cell anabolism, especially extracellular matrix production. The difference between BMP members in their capacity to modulate intervertebral disc cell activity is yet to be defined. BMP-7/OP-1 has been shown to retard disc degeneration. We compared the activity of BMP-7 with BMP-2 on nucleus pulposus (NP) cell phenotype and function, and investigated how they differentially affect the gene expression profiles of signaling cascade components in human NP cells under degenerative states...
January 19, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28102305/structure-and-membrane-interactions-of-the-homodimeric-antibiotic-peptide-homotarsinin
#3
Rodrigo M Verly, Jarbas M Resende, Eduardo F C Junior, Mariana T Q de Magalhães, Carlos F C R Guimarães, Victor H O Munhoz, Marcelo Porto Bemquerer, Fábio C L Almeida, Marcelo M Santoro, Dorila Piló-Veloso, Burkhard Bechinger
Antimicrobial peptides (AMPs) from amphibian skin are valuable template structures to find new treatments against bacterial infections. This work describes for the first time the structure and membrane interactions of a homodimeric AMP. Homotarsinin, which was found in Phyllomedusa tarsius anurans, consists of two identical cystine-linked polypeptide chains each of 24 amino acid residues. The high-resolution structures of the monomeric and dimeric peptides were determined in aqueous buffers. The dimer exhibits a tightly packed coiled coil three-dimensional structure, keeping the hydrophobic residues screened from the aqueous environment...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28102214/corrigendum-wnk1-kinase-balances-t-cell-adhesion-versus-migration-in-vivo
#4
Robert Köchl, Flavian Thelen, Lesley Vanes, Tiago F Brazão, Kathryn Fountain, Jian Xie, Chou-Long Huang, Ruth Lyck, Jens V Stein, Victor L J Tybulewicz
No abstract text is available yet for this article.
January 19, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28101943/stability-of-color-in-spanish-style-green-table-olives-pasteurized-and-stored-in-plastic-containers
#5
Antonio Higinio Sánchez, Antonio López-López, Víctor Manuel Beato, Antonio de Castro, Alfredo Montaño
BACKGROUND: There is an increasing interest in the use of pasteurizable plastic packaging by the olive industry. In order to investigate the change from traditional glass or varnished can containers to plastic packaging, the proper plastic material that is compatible with fermented olives while maintaining color quality during pasteurization treatment and storage must be selected. This work is focused on color stability in two distinct pasteurizable plastic containers with different oxygen permeability...
January 19, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28101804/white-matter-hyperintensities-correlate-to-cognition-and-fiber-tract-integrity-in-older-adults-with-hiv
#6
Christa Watson, Edgar Busovaca, Jessica M Foley, I Elaine Allen, Christopher G Schwarz, Neda Jahanshad, Talia M Nir, Pardis Esmaeili-Firidouni, Benedetta Milanini, Howard Rosen, Owen T Carmichael, Paul M Thompson, Victor G Valcour
Our aim was to examine the clinical relevance of white matter hyperintensities (WMH) in HIV. We used an automated approach to quantify WMH volume in HIV seropositive (HIV+; n = 65) and HIV seronegative (HIV-; n = 29) adults over age 60. We compared WMH volumes between HIV+ and HIV- groups in cross-sectional and multiple time-point analyses. We also assessed correlations between WMH volumes and cardiovascular, HIV severity, cognitive scores, and diffusion tensor imaging variables. Serostatus groups did not differ in WMH volume, but HIV+ participants had less cerebral white matter (mean: 470...
January 18, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28101285/twitter-as-a-tool-for-teaching-and-communicating-microbiology-the-micromoocsem-initiative
#7
Ignacio López-Goñi, Ma José Martínez-Viñas, Josefa Antón, Víctor J Cid, Ana Martín González, Maryury Brown-Jaque, Juan M García-Lobo, Manuel Sánchez, Juan Ignacio Vilchez, Tatiana Robledo-Mahón, Marina Seder-Colomina, Silvana Teresa Tapia-Paniagua, Alma Hernández de Rojas, Alejandro Mira, José Jesús Gallego-Parrilla, Teresa María López Díaz, Sergi Maicas I Prieto, Eduardo Villalobo, Guillermo Quindós, Sabela Balboa, Jesús L Romalde, Clara Aguilar-Pérez, Anna Tomás, María Linares, Óscar Zaragoza, Jéssica Gil-Serna, Raquel Ferrer-Espada, Ana I Camacho, Laura Vinué, Jorge García-Lara
No abstract text is available yet for this article.
December 2016: Journal of Microbiology & Biology Education: JMBE
https://www.readbyqxmd.com/read/28100977/preserving-a-well-functioning-33-year-old-starr-edwards-aortic-prosthesis-in-repeat-aortic-root-aneurysm-repair
#8
Abdallah K Alameddine, Victor K Alimov, John A Rousou, Fabrizio I Pluchino
We report the case of a 61-year-old obese male patient in whom we found a well-functioning 33-year-old Starr-Edwards aortic prosthesis during repeat aortic surgery. Rather than explant the prosthesis, we remodeled the aortic root, almost completely removing the aortic sinuses and leaving only a pillar of aortic tissue around the coronary ostia. The proximal end of a Hemashield tube-graft was then scalloped to accommodate the remaining aortic tissue. The patient's heart function was excellent after his weaning from cardiopulmonary bypass...
December 2016: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28100721/meta-analysis-of-timing-of-endovascular-aneurysm-treatment-in-subarachnoid-haemorrhage-inconsistent-results-of-early-treatment-within-1-day
#9
Sapna Rawal, Paula Alcaide-Leon, R Loch Macdonald, Gabriel J E Rinkel, J Charles Victor, Timo Krings, Moira K Kapral, Andreas Laupacis
BACKGROUND AND PURPOSE: To systematically review and meta-analyse the data on impact of timing of endovascular treatment in aneurysmal subarachnoid haemorrhage (SAH) to determine if earlier treatment is associated with improved clinical outcomes and reduced case fatality. METHODS: We searched MEDLINE, Cochrane database, EMBASE and Web of Science to identify studies for inclusion. The measures of effect utilised were unadjusted/adjusted ORs. Effect estimates were combined using random effects models for each outcome (poor outcome, case fatality); heterogeneity was assessed using the I(2) index...
January 18, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28100677/paired-siglec-receptors-generate-opposite-inflammatory-responses-to-a-human-specific-pathogen
#10
Flavio Schwarz, Corinna S Landig, Shoib Siddiqui, Ismael Secundino, Joshua Olson, Nissi Varki, Victor Nizet, Ajit Varki
Paired immune receptors display near-identical extracellular ligand-binding regions but have intracellular sequences with opposing signaling functions. While inhibitory receptors dampen cellular activation by recognizing self-associated molecules, the functions of activating counterparts are less clear. Here, we studied the inhibitory receptor Siglec-11 that shows uniquely human expression in brain microglia and engages endogenous polysialic acid to suppress inflammation. We demonstrated that the human-specific pathogen Escherichia coli K1 uses its polysialic acid capsule as a molecular mimic to engage Siglec-11 and escape killing...
January 18, 2017: EMBO Journal
https://www.readbyqxmd.com/read/28100427/the-possible-role-of-propofol-in-drug-induced-torsades-de-pointes-a-real-world-single-center-analysis
#11
Victor A Abrich, Harish Ramakrishna, Arjun Mehta, Farouk Mookadam, Komandoor Srivathsan
BACKGROUND: Torsades de pointes (TdP) is a polymorphic ventricular tachycardia associated with QT prolongation. Propofol is a sedative-anesthetic with proarrhythmic effects on cardiac myocytes. We performed a retrospective study to determine the incidence of TdP following propofol exposure at Mayo Clinic (Rochester, MN) from 08/11/1998-11/20/2015. METHODS: We queried our database using key search terms to identify patients exposed to propofol who developed TdP perioperatively or during non-surgical sedation...
January 4, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28100402/the-randomized-controlled-trial-of-late-surfactant-effects-on-respiratory-outcomes-at-1-year-corrected-age
#12
Roberta L Keller, Eric C Eichenwald, Anna Maria Hibbs, Elizabeth E Rogers, Katherine C Wai, Dennis M Black, Philip L Ballard, Jeanette M Asselin, William E Truog, Jeffrey D Merrill, Mark C Mammel, Robin H Steinhorn, Rita M Ryan, David J Durand, Catherine M Bendel, Ellen M Bendel-Stenzel, Sherry E Courtney, Ramasubbareddy Dhanireddy, Mark L Hudak, Frances R Koch, Dennis E Mayock, Victor J McKay, Jennifer Helderman, Nicolas F Porta, Rajan Wadhawan, Lisa Palermo, Roberta A Ballard
OBJECTIVE: To determine the effects of late surfactant on respiratory outcomes determined at 1-year corrected age in the Trial of Late Surfactant (TOLSURF), which randomized newborns of extremely low gestational age (≤28 weeks' gestational age) ventilated at 7-14 days to late surfactant and inhaled nitric oxide vs inhaled nitric oxide-alone (control). STUDY DESIGN: Caregivers were surveyed in a double-blinded manner at 3, 6, 9, and 12 months' corrected age to collect information on respiratory resource use (infant medication use, home support, and hospitalization)...
January 16, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28100053/the-grateful-infrared-sequential-protein-structural-changes-resolved-by-infrared-difference-spectroscopy
#13
Tilman Kottke, Víctor A Lórenz-Fonfría, Joachim Heberle
The catalytic activity of proteins is a function of structural changes. Very often these are as minute as protonation changes, hydrogen bonding changes, and amino acid side chain reorientations. To resolve these, a methodology is afforded that not only provides the molecular sensitivity but allows for tracing the sequence of these hierarchical reactions at the same time. This feature article showcases results from time-resolved IR spectroscopy on channelrhodopsin (ChR), light-oxygen-voltage (LOV) domain protein, and cryptochrome (CRY)...
January 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28100048/unanticipated-stickiness-of-%C3%AE-pinene
#14
Hilary M Chase, Junming Ho, Mary Alice Upshur, Regan J Thomson, Victor S Batista, Franz M Geiger
Hilary M. Chase1#, Junming Ho2#, Mary Alice Upshur1, Regan J. Thomson1, Victor S. Batista3, Franz M. Geiger1* 1Department of Chemistry, Northwestern University, Evanston, IL. 60208, United States; 2 Agency for Science, Technology and Research, Institute of High Performance Computing, 1 Fusionopolis Way #16-16 Connexis North, Singapore 138632; 3Department of Chemistry, Yale University, P.O. Box 208107, New Haven, CT. 06520, United States # These authors contributed equally to this work. *corresponding author: geigerf@chem...
January 19, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28099568/progressive-hearing-loss-and-cerebellar-ataxia-in-anti-ma2-associated-autoimmune-encephalitis
#15
Paulo Victor Sgobbi de Souza, Thiago Bortholin, Wladimir Bocca Vieira de Rezende Pinto, Adrialdo José Santos
No abstract text is available yet for this article.
January 2017: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/28099448/the-effects-of-low-power-laser-irradiation-on-inflammation-and-apoptosis-in-submandibular-glands-of-diabetes-induced-rats
#16
Cíntia Yuki Fukuoka, Alyne Simões, Toshikazu Uchiyama, Victor Elias Arana-Chavez, Yoshimitsu Abiko, Noboru Kuboyama, Ujjal K Bhawal
Diabetes can lead to dysfunction of the secretory capacity in salivary glands. Activation of the receptor for advanced glycation end products (RAGE) and its ligands has been suggested to participate in chronic disorders such as diabetes and its complications. In this study, the expression of RAGE, high mobility group box 1 (HMGB1) and advanced glycation end products (AGE), as well as the effects of low-power laser irradiation (LPLI) in salivary glands of diabetic rats were evaluated, and the mechanisms involved were characterized...
2017: PloS One
https://www.readbyqxmd.com/read/28099371/examining-the-relationships-between-clinical-judgment-simulation-performance-and-clinical-performance
#17
Joyce Victor, Wanda Ruppert, Sara Ballasy
Simulation-based learning experiences are designed to prepare the student for clinical practice; however, there is little documentation of a relationship between simulation performance and performance in the clinical setting. When essential aspects of a clinical situation are replicated in simulation, students should readily understand and manage similar situations in clinical practice. This study examined the relationships between clinical nursing judgment development, simulation performance, and clinical performance...
January 18, 2017: Nurse Educator
https://www.readbyqxmd.com/read/28099188/hepatitis-b-incidence-and-prevention-with-antiretroviral-therapy-among-hiv-positive-individuals-in-rakai-uganda
#18
Emmanuel Seremba, Victor Ssempijja, Sarah Kalibbala, Ronald H Gray, Maria J Wawer, Fred Nalugoda, Corey Casper, Warren T Phipps, Ponsiano Ocama, David Serwadda, David L Thomas, Steven Reynolds
OBJECTIVE: Antiretroviral therapy (ART) may interfere with replication of hepatitis B (HBV) raising the hypothesis that HBV infection might be prevented by ART. We investigated the incidence and risk factors associated with HBV among HIV-infected adults in Rakai, Uganda. METHODS: We screened stored sera from 944 HIV-infected adults enrolled in the Rakai Community Cohort Study between September 2003 and March 2015 for evidence of HBV exposure. Serum from participants who tested anti-HBc negative (497) at baseline were tested over 3-7 consecutive survey rounds for incident HBV...
January 17, 2017: AIDS
https://www.readbyqxmd.com/read/28099009/thickness-controlled-quasi-two-dimensional-colloidal-pbse-nanoplatelets
#19
Weon-Kyu Koh, Naveen Kumar Dandu, Andrew F Fidler, Victor I Klimov, Jeffrey M Pietryga, Svetlana V Kilina
We demonstrate controlled synthesis of discrete two-dimensional (2D) PbSe nanoplatelets (NPLs), with measureable photoluminescence, via oriented attachment directed by quantum dot (QD) surface chemistry. Halide passivation is critical to the growth of these (100) face-dominated NPLs, as corroborated by density functional theory studies. PbCl2 moieties attached to the (111) and (110) of small nanocrystals form interparticle bridges, aligning the QDs and leading to attachment. We find that a 2D bridging network is energetically favored over a 3D network, driving the formation of NPLs...
January 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28098951/lessons-learned-from-a-practice-based-multisite-intervention-study-with-nurse-participants
#20
Christopher R Friese, Kari Mendelsohn-Victor, Pamela Ginex, Carol M McMahon, Alex J Fauer, Marjorie C McCullagh
PURPOSE: To identify challenges and solutions to the efficient conduct of a multisite, practice-based randomized controlled trial to improve nurses' adherence to personal protective equipment use in ambulatory oncology settings. DESIGN: The Drug Exposure Feedback and Education for Nurses' Safety (DEFENS) study is a clustered, randomized, controlled trial. Participating sites are randomized to Web-based feedback on hazardous drug exposures in the sites plus tailored messages to address barriers versus a control intervention of a Web-based continuing education video...
January 18, 2017: Journal of Nursing Scholarship
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