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https://www.readbyqxmd.com/read/29452248/mercaptopyruvate-acts-as-endogenous-vasodilator-independently-of-3-mercaptopyruvate-sulfurtransferase-activity
#1
Emma Mitidieri, Teresa Tramontano, Danila Gurgone, Valentina Citi, Vincenzo Calderone, Vincenzo Brancaleone, Antonia Katsouda, Noriyuki Nagahara, Andreas Papapetropoulos, Giuseppe Cirino, Roberta d'Emmanuele di Villa Bianca, Raffaella Sorrentino
Hydrogen sulfide (H 2 S) is produced by the action of cystathionine-β-synthase (CBS), cystathionine-γ-lyase (CSE) or 3-mercaptopyruvate sulfurtransferase (3-MST). 3-MST converts 3-mercaptopyruvate (MPT) to H 2 S and pyruvate. H 2 S is recognized as an endogenous gaseous mediator with multiple regulatory roles in mammalian cells and organisms. In the present study we demonstrate that MPT, the endogenous substrate of 3-MST, acts also as endogenous H 2 S donor. Colorimetric, amperometric and fluorescence based assays demonstrated that MPT releases H 2 S in vitro in an enzyme-independent manner...
February 13, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29445961/application-of-combined-porous-tantalum-scaffolds-loaded-with-bone-morphogenetic-protein-7-to-repair-of-osteochondral-defect-in-rabbits
#2
Qian Wang, Hui Zhang, Hongquan Gan, Hui Wang, Qijia Li, Zhiqiang Wang
PURPOSE: Porous tantalum (PT) has been widely used in orthopaedic applications for low modulus of elasticity, excellent biocompatibility, and the microstructures similar to cancellous bone. In order to improve the biological activity of PT, biologically active factors can be combined with the material. The purpose of this study was to investigate if bone morphogenetic protein 7 (BMP-7) modifications could enhance the repairing of cartilage of PT in osteochondral defect in medial femoral condyle of rabbits...
February 14, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29433921/modified-perceptual-training-in-sport-a-new-classification-framework
#3
REVIEW
Stephen Mark Hadlow, Derek Panchuk, David Lindsay Mann, Marc Ronald Portus, Bruce Abernethy
OBJECTIVES: To overview a framework that provides a theoretically-grounded approach to predicting the types of modified perceptual training tasks that will stimulate transfer of improved perceptual skills to sport performance environments. Modified perceptual training (MPT) collectively describes on- or off-field sports training tasks that are specifically designed to develop visual and perceptual-cognitive skill. Traditional training approaches in sport include sports vision training and perceptual-cognitive training, while recently, new technologies have enabled a broad range of additional MPT tools to become available to coaches and athletes...
February 3, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29426003/programmed-necrosis-in-heart-disease-molecular-mechanisms-and-clinical-implications
#4
Hong Zhu, Aijun Sun
Programmed cell death plays an essential role in myocardial homeostasis and pathology. Three distinct forms of programmed cell death have been identified, namely apoptosis, necrosis, and autophagic cell death. Necrosis, previously known as an unregulated form of cell death, has been recognized as a highly regulated process now and attracted great attention over the past decade. Programmed necrosis mainly refers to necroptosis, pyroptosis, ferroptosis, and mitochondrial permeability transition (MPT)-dependent necrosis...
February 6, 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29411604/fe-stabilization-by-intermetallic-l10-fept-and-pt-catalysis-enhancement-in-l10-fept-pt-nanoparticles-for-efficient-oxygen-reduction-reaction-in-fuel-cells
#5
Junrui Li, Zheng Xi, Yung-Tin Pan, Jacob S Spendelow, Paul N Duchesne, Dong Su, Qing Li, Chao Yu, Zhouyang Yin, Bo Shen, Yu Seung Kim, Peng Zhang, Shouheng Sun
We report in this article a detailed study on how to stabilize a first-row transition metal (M) in an intermetallic L10-MPt alloy nanoparticle (NP) structure and how to surround the L10-MPt with an atomic layer of Pt to enhance the electrocatalysis of Pt for oxygen reduction reaction (ORR) in fuel cell operation conditions. Using 8 nm FePt NPs as an example, we demonstrate that Fe can be stabilized more efficiently in a core/shell structured L10-FePt/Pt with a 5 Å Pt shell. The presence of Fe in the alloy core induces the desired compression of the thin Pt shell, especially the 2 atomic layers of Pt shell, further improving the ORR catalysis...
February 7, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29409747/the-impact-of-the-injection-mold-temperature-upon-polymer-crystallization-and-resulting-drug-release-from-immediate-and-sustained-release-tablets
#6
Jeroen Van Renterghem, Heleen Dhondt, Glenn Verstraete, Michiel De Bruyne, Chris Vervaet, Thomas De Beer
It was the aim of this study to elucidate the impact of the injection mold temperature upon the polymer crystallinity, its microstructure and the resulting drug release from immediate and sustained release tablets containing semi-crystalline polymers. The immediate release formulation contained 20% (w/w) ketoprofen (KETO) in poly (ethylene oxide) (PEO) and the sustained release formulation contained 20 - 40% (w/w) metoprolol tartrate (MPT) in polycaprolactone (PCL). Physical mixtures of drug-polymer were characterized via isothermal crystallization experiments using DSC and rheological measurements to elucidate the impact of the drug solid-state upon the crystallization kinetics...
January 31, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29405439/non-invasive-evaluation-of-human-mucosal-structures-by-multiphoton-laser-scanning-tomography-in-vitro
#7
S Springer, M Zieger, U C Hipler, K König, J Lademann, M Kaatz, M J Koehler
BACKGROUND: Mucous membranes may be affected by various diseases and the diagnostic accessibility is limited. Multiphoton laser tomography (MPT) is a useful tool for in vivo evaluation of superficial skin structures and might also be useful for the imaging of mucosa. OBJECTIVES: In order to investigate the suitability of MPT for the evaluation of mucous membranes, tissue samples of different donors and anatomical localizations have been imaged. METHODS: Human mucosa samples from the urinary bladder, palatine tonsil and ocular conjunctiva were investigated by MPT and subsequently compared with conventional histology...
February 6, 2018: Skin Research and Technology
https://www.readbyqxmd.com/read/29364134/csstag-optical-nanoscale-radar-and-particle-tracking-for-in-body-and-microfluidic-systems-with-vibrating-graphene-and-resonance-energy-transfer
#8
Burhan Gulbahar, Gorkem Memisoglu
Biological particle tracking systems monitor cellular processes or particle behaviors with the great accuracy. The emissions of fluorescent molecules or direct images of particles are captured with cameras or photodetectors. The current imaging systems have challenges in detection, collection, and analysis of imaging data, penetration depth, and complicated set-ups. In this paper, a signaling-based nanoscale acousto-optic radar and microfluidic multiple particle tracking (MPT) system is proposed based on the theoretical design providing nanoscale optical modulator with vibrating Förster resonance energy transfer and vibrating cadmium selenide/zinc sulfide quantum dots (QDs) on graphene resonators...
December 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/29362479/molecular-mechanisms-of-cell-death-recommendations-of-the-nomenclature-committee-on-cell-death-2018
#9
REVIEW
Lorenzo Galluzzi, Ilio Vitale, Stuart A Aaronson, John M Abrams, Dieter Adam, Patrizia Agostinis, Emad S Alnemri, Lucia Altucci, Ivano Amelio, David W Andrews, Margherita Annicchiarico-Petruzzelli, Alexey V Antonov, Eli Arama, Eric H Baehrecke, Nickolai A Barlev, Nicolas G Bazan, Francesca Bernassola, Mathieu J M Bertrand, Katiuscia Bianchi, Mikhail V Blagosklonny, Klas Blomgren, Christoph Borner, Patricia Boya, Catherine Brenner, Michelangelo Campanella, Eleonora Candi, Didac Carmona-Gutierrez, Francesco Cecconi, Francis K-M Chan, Navdeep S Chandel, Emily H Cheng, Jerry E Chipuk, John A Cidlowski, Aaron Ciechanover, Gerald M Cohen, Marcus Conrad, Juan R Cubillos-Ruiz, Peter E Czabotar, Vincenzo D'Angiolella, Ted M Dawson, Valina L Dawson, Vincenzo De Laurenzi, Ruggero De Maria, Klaus-Michael Debatin, Ralph J DeBerardinis, Mohanish Deshmukh, Nicola Di Daniele, Francesco Di Virgilio, Vishva M Dixit, Scott J Dixon, Colin S Duckett, Brian D Dynlacht, Wafik S El-Deiry, John W Elrod, Gian Maria Fimia, Simone Fulda, Ana J García-Sáez, Abhishek D Garg, Carmen Garrido, Evripidis Gavathiotis, Pierre Golstein, Eyal Gottlieb, Douglas R Green, Lloyd A Greene, Hinrich Gronemeyer, Atan Gross, Gyorgy Hajnoczky, J Marie Hardwick, Isaac S Harris, Michael O Hengartner, Claudio Hetz, Hidenori Ichijo, Marja Jäättelä, Bertrand Joseph, Philipp J Jost, Philippe P Juin, William J Kaiser, Michael Karin, Thomas Kaufmann, Oliver Kepp, Adi Kimchi, Richard N Kitsis, Daniel J Klionsky, Richard A Knight, Sharad Kumar, Sam W Lee, John J Lemasters, Beth Levine, Andreas Linkermann, Stuart A Lipton, Richard A Lockshin, Carlos López-Otín, Scott W Lowe, Tom Luedde, Enrico Lugli, Marion MacFarlane, Frank Madeo, Michal Malewicz, Walter Malorni, Gwenola Manic, Jean-Christophe Marine, Seamus J Martin, Jean-Claude Martinou, Jan Paul Medema, Patrick Mehlen, Pascal Meier, Sonia Melino, Edward A Miao, Jeffery D Molkentin, Ute M Moll, Cristina Muñoz-Pinedo, Shigekazu Nagata, Gabriel Nuñez, Andrew Oberst, Moshe Oren, Michael Overholtzer, Michele Pagano, Theocharis Panaretakis, Manolis Pasparakis, Josef M Penninger, David M Pereira, Shazib Pervaiz, Marcus E Peter, Mauro Piacentini, Paolo Pinton, Jochen H M Prehn, Hamsa Puthalakath, Gabriel A Rabinovich, Markus Rehm, Rosario Rizzuto, Cecilia M P Rodrigues, David C Rubinsztein, Thomas Rudel, Kevin M Ryan, Emre Sayan, Luca Scorrano, Feng Shao, Yufang Shi, John Silke, Hans-Uwe Simon, Antonella Sistigu, Brent R Stockwell, Andreas Strasser, Gyorgy Szabadkai, Stephen W G Tait, Daolin Tang, Nektarios Tavernarakis, Andrew Thorburn, Yoshihide Tsujimoto, Boris Turk, Tom Vanden Berghe, Peter Vandenabeele, Matthew G Vander Heiden, Andreas Villunger, Herbert W Virgin, Karen H Vousden, Domagoj Vucic, Erwin F Wagner, Henning Walczak, David Wallach, Ying Wang, James A Wells, Will Wood, Junying Yuan, Zahra Zakeri, Boris Zhivotovsky, Laurence Zitvogel, Gerry Melino, Guido Kroemer
Over the past decade, the Nomenclature Committee on Cell Death (NCCD) has formulated guidelines for the definition and interpretation of cell death from morphological, biochemical, and functional perspectives. Since the field continues to expand and novel mechanisms that orchestrate multiple cell death pathways are unveiled, we propose an updated classification of cell death subroutines focusing on mechanistic and essential (as opposed to correlative and dispensable) aspects of the process. As we provide molecularly oriented definitions of terms including intrinsic apoptosis, extrinsic apoptosis, mitochondrial permeability transition (MPT)-driven necrosis, necroptosis, ferroptosis, pyroptosis, parthanatos, entotic cell death, NETotic cell death, lysosome-dependent cell death, autophagy-dependent cell death, immunogenic cell death, cellular senescence, and mitotic catastrophe, we discuss the utility of neologisms that refer to highly specialized instances of these processes...
January 23, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29327686/severity-of-dysphonia-in-patients-during-first-days-after-iatrogenic-injury
#10
Katarzyna Jędra, Ewelina Sielska-Badurek, Kazimierz Niemczyk
INTRODUCTION: The most common cause of vocal fold paralysis (VFP) is iatrogenic injury. Patients with symptoms of VFP present to the specialist after a couple of weeks or even months since the onset of symptoms. In the literature, the data regarding speech impairment during the first days after a iatrogenic injury is lacking. AIM: to evaluate the quality of voice during first days of vocal fold paralysis following a iatrogenic injury. MATERIALS AND METHODS: Twenty-five patients with iatrogenic vocal fold paralysis who presented for phoniatric consultation at the Department of Otolaryngology of the Medical University of Warsaw between May 2015 and December 2016 were enrolled in the study...
October 31, 2017: Otolaryngologia Polska
https://www.readbyqxmd.com/read/29325856/is-insufficient-pulmonary-air-support-the-cause-of-dysphonia-in-chronic-obstructive-pulmonary-disease
#11
Megahed M Hassan, Mona T Hussein, Ahmed Mamdouh Emam, Usama M Rashad, Ibrahim Rezk, Al Hussein Awad
OBJECTIVE: Optimal pulmonary air support is essential pre-requisite for efficient phonation. The objective is to correlate pulmonary and vocal functions in chronic obstructive pulmonary disease (COPD) to find out whether the reduced pulmonary function per se could induce dysphonia. METHODS: In this prospective case-control study, sixty subjects with stable COPD underwent evaluation of pulmonary and vocal functions. The pulmonary functions measured include {Forced vital capacity (FVC), forced expiratory volume in the first second (FEV1), FEV1/FVC ratio, peak expiratory flow (PEF), maximum mid-expiratory flow (MMEF)}...
January 8, 2018: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29317759/coupling-modern-portfolio-theory-and-marxan-enhances-the-efficiency-of-lesser-white-fronted-goose-s-anser-erythropus-habitat-conservation
#12
Jie Liang, Xiang Gao, Guangming Zeng, Shanshan Hua, Minzhou Zhong, Xiaodong Li, Xin Li
Climate change and human activities cause uncertain changes to species biodiversity by altering their habitat. The uncertainty of climate change requires planners to balance the benefit and cost of making conservation plan. Here optimal protection approach for Lesser White-fronted Goose (LWfG) by coupling Modern Portfolio Theory (MPT) and Marxan selection were proposed. MPT was used to provide suggested weights of investment for protected area (PA) and reduce the influence of climatic uncertainty, while Marxan was utilized to choose a series of specific locations for PA...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29314074/efficacy-of-type-i-thyroplasty-after-endoscopic-cordectomy-for-early-stage-glottic-cancer-literature-review
#13
Caitlin Bertelsen, Lindsay Reder
OBJECTIVE: As phonomicrosurgical techniques have evolved, endoscopic cordectomy (EC) has been used more commonly for early-stage glottic cancer. Patients undergoing more extensive surgery often experience significant postoperative dysphonia for which there is no standard treatment. Surgical options include injection laryngoplasty and thyroplasty. We reviewed the literature to evaluate the efficacy of thyroplasty after EC. METHODS: A comprehensive literature search was conducted to identify studies of adults undergoing thyroplasty for dysphonia after EC for glottic cancer...
January 4, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29306493/delivery-room-resuscitation-and-short-term-outcomes-in-moderately-preterm-infants
#14
Monika Bajaj, Girija Natarajan, Seetha Shankaran, Myra Wyckoff, Abbot R Laptook, Edward F Bell, Barbara J Stoll, Waldemar A Carlo, Betty R Vohr, Shampa Saha, Krisa P Van Meurs, Pablo J Sanchez, Carl T D'Angio, Rosemary D Higgins, Abhik Das, Nancy Newman, Michele C Walsh
OBJECTIVES: To describe the frequency and extent of delivery room resuscitation and evaluate the association of delivery room resuscitation with neonatal outcomes in moderately preterm (MPT) infants. STUDY DESIGN: This was an observational cohort study of MPT infants delivered at 290/7 to 336/7 weeks' gestational age (GA) enrolled in the Neonatal Research Network MPT registry. Infants were categorized into 5 groups based on the highest level of delivery room intervention: routine care, oxygen and/or continuous positive airway pressure, bag and mask ventilation, endotracheal intubation, and cardiopulmonary resuscitation including chest compressions and/or epinephrine use...
January 3, 2018: Journal of Pediatrics
https://www.readbyqxmd.com/read/29305112/design-and-intestinal-mucus-penetration-mechanism-of-core-shell-nanocomplex
#15
Xin Zhang, Hongbo Cheng, Wei Dong, Meixia Zhang, Qiaoyu Liu, Xiuhua Wang, Jian Guan, Wu Haiyang, Shirui Mao
The objective of this study was to design intestinal mucus-penetrating core-shell nanocomplex by functionally mimicking the surface of virus, which can be used as the carrier for peroral delivery of macromolecules, and further understand the influence of nanocomplex surface properties on the mucosal permeation capacity. Taking insulin as a model drug, the core was formed by the self-assembly among positively charged chitosan, insulin and negatively charged sodium tripolyphosphate, different types of alginates were used as the shell forming material...
January 2, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29301702/altitudinal-distribution-of-two-sibling-species-of-the-drosophila-tripunctata-group-in-a-preserved-tropical-forest-and-their-male-sterility-thermal-thresholds
#16
Marcos Roberto Dias Batista, Felipe Bastos Rocha, Louis Bernard Klaczko
Variation of ecophysiological traits may help to explain geographic distribution patterns of Drosophila sibling species. Many traits in ectotherms have optimal performance within specific temperature ranges. Altitudinal gradients are potentially informative for characterizing differences of sibling species distributions. We collected two sibling species of the tripunctata group - Drosophila mediopunctata (MPT) and D. unipunctata (UNI) - at eight altitudes (ranging from 593 to 1185m above sea level) located at a continuous Atlantic Rainforest reserve in consecutive years (2009-2011), with two collections at the hot-rainy season and two at the cold-dry season...
January 2018: Journal of Thermal Biology
https://www.readbyqxmd.com/read/29289030/structural-microrheological-and-kinetic-properties-of-a-ternary-silica-pluronic-f127-starch-thermosensitive-system
#17
Yana Petkova-Olsson, Claude Oelschlaeger, Henrik Ullsten, Lars Järnström
HYPOTHESIS: The sol-gel transition in aqueous suspensions consisting of silica particles and thermosensitive polymer is controlled by inter-particle forces and solution properties of the polymer. Addition of a second non-thermosensitive polymer may affect the transition. The purpose of this work was to characterize the kinetics of the sol-gel transition and to understand the effects of a second non-thermosensitive polymer on the microstructure, using a combination of classical rheology and microrheology...
December 19, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29288312/factors-predicting-the-recovery-of-unilateral-vocal-fold-paralysis-after-thyroidectomy
#18
Yong-Sug Choi, Young-Hoon Joo, Young-Hak Park, Sang-Yeon Kim, Dong-Il Sun
BACKGROUND: We used voice analysis and clinicopathological factors to explore the prognosis of unilateral vocal fold paralysis after thyroid surgery. METHODS: The medical records of 63 females who developed unilateral vocal fold paralysis after thyroidectomy were reviewed. All patients were divided into two groups: those who recovered from vocal fold paralysis and those who did not. We analyzed clinical parameters and voice analysis results in a search for correlations with recovery from paralysis...
December 30, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/29284557/inter-scan-reproducibility-of-carotid-plaque-volume-measurements-by-3-d-ultrasound
#19
Benjamin V Sandholt, Antoine Collet-Billon, Robert Entrekin, Henrik H Sillesen
We tested a novel 3-D matrix transducer with respect to inter-scan reproducibility of carotid maximum plaque thickness (MPT) and volume measurements. To improve reproducibility while focusing on the largest plaque/most diseased part of the carotid artery, we introduced a new partial plaque volume (PPV) measure centered on MPT. Total plaque volume (TPV), PPV from a 10-mm segment and MPT were measured using dedicated semi-automated software on 38 plaques from 26 patients. Inter-scan reproducibility was assessed using the t-test, Bland-Altman plots and Pearson's correlation coefficient...
December 25, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29282507/recovery-of-voice-after-reconstruction-of-the-recurrent-laryngeal-nerve-and-adjuvant-nimodipine
#20
P Mattsson, A Frostell, G Björck, J K E Persson, R Hakim, J Zedenius, M Svensson
BACKGROUND: Transection injury to the recurrent laryngeal nerve (RLN) has been associated with permanent vocal fold palsy, and treatment has been limited to voice therapy or local treatment of vocal folds. Microsurgical repair has been reported to induce a better function. The calcium channel antagonist nimodipine improves functional recovery after experimental nerve injury and also after cranial nerve injury in patients. This study aims to present voice outcome in patients who underwent repair of the RLN and received nimodipine during regeneration...
December 28, 2017: World Journal of Surgery
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