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https://www.readbyqxmd.com/read/29679932/tcnq-molecular-semiconductor-of-the-cu-ii-taab-macrocycle-optical-and-electrical-properties
#1
M E Sánchez Vergara, R Salcedo, Bertha Molina, R Carrera-Téllez, J R Álvarez-Bada, A Hernández-García, V Gómez-Vidales
The present study reports the doping of a semiconducting molecular material through the formation of hydrogen bonds between the macrocycle Cu(II)(TAAB) and the electronic acceptor TCNQ. According to density functional theory (DFT) calculations and electron paramagnetic resonance (EPR) analysis, the doped compound has the shape of a distorted square pyramid, with four nitrogen atoms in the equatorial position and the apical oxygen atom from the water ligands. These water molecules can generate strong hydrogen bonds with TCNQ and the TAAB metallic complex...
April 11, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29679893/identification-of-homocysteine-suppressive-mitochondrial-etc-complex-genes-and-tissue-expression-profile-novel-hypothesis-establishment
#2
Ramon Cueto, Lixiao Zhang, Hui Min Shan, Xiao Huang, Xinyuan Li, Ya-Feng Li, Jahaira Lopez, William Y Yang, Muriel Lavallee, Catherine Yu, Yong Ji, Xiaofeng Yang, Hong Wang
Hyperhomocysteinemia (HHcy) is an independent risk factor for cardiovascular disease (CVD) which has been implicated in matochondrial (Mt) function impairment. In this study, we characterized Hcy metabolism in mouse tissues by using LC-ESI-MS/MS analysis, established tissue expression profiles for 84 nuclear-encoded Mt electron transport chain complex (nMt-ETC-Com) genes in 20 human and 19 mouse tissues by database mining, and modeled the effect of HHcy on Mt-ETC function. Hcy levels were high in mouse kidney/lung/spleen/liver (24-14 nmol/g tissue) but low in brain/heart (~5 nmol/g)...
April 4, 2018: Redox Biology
https://www.readbyqxmd.com/read/29679878/modeling-of-intracerebral-interictal-epileptic-discharges-evidence-for-network-interactions
#3
Stephan Meesters, Pauly Ossenblok, Albert Colon, Louis Wagner, Olaf Schijns, Paul Boon, Luc Florack, Andrea Fuster
OBJECTIVE: The interictal epileptic discharges (IEDs) occurring in stereotactic EEG (SEEG) recordings are in general abundant compared to ictal discharges, but difficult to interpret due to complex underlying network interactions. A framework is developed to model these network interactions. METHODS: To identify the synchronized neuronal activity underlying the IEDs, the variation in correlation over time of the SEEG signals is related to the occurrence of IEDs using the general linear model...
April 11, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29679752/thermodynamic-compatibility-between-cyclodextrin-supramolecular-complexes-and-surfactant
#4
Larissa H R Meira, Guilherme A B Soares, Homero I M Bonomini, Juliana Fedoce Lopes, Frederico B De Sousa
Supramolecular structures based on cyclodextrins have been extensively used for drug delivery systems over decades. However, combining host and guest molecules in a pharmaceutical formulation is not a trivial process, being one of the majors concern the inclusion complex compatibility with other excipients presented in the final formulation. Herein, experimental and theoretical calculations were used to investigate the competition of sodium dodecyl sulfate (SDS) with atenolol (ATE) or losartan (LOS), antihypertensive drugs widely used in the treatment of hypertension...
April 18, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29679463/cdp-choline-protects-liver-from-ischemia-reperfusion-injury-preserving-mitochondrial-function-and-reducing-oxidative-stress
#5
Cecilia Zazueta, Mabel Buelna-Chontal, Arturo Macías-López, Nadia G Román-Anguiano, Héctor González-Pacheco, Natalia Pavón, Rashidi Springall, Alberto Aranda-Frausto, Rafael Bojalil, Alejandro Silva-Palacios, Rodrigo Velázquez-Espejel, Sonia Galvan Arzate, Francisco Correa
CDP-choline (citicoline) participates as intermediary in the synthesis of phosphatidylcholine, an essential component of cellular membranes. Citicoline treatment has shown beneficial effects in cerebral ischemia, but its potential to diminish reperfusion damage in liver has not been explored. In this work, we evaluated the hepatoprotective effect of citicoline and its possible association with inflammatory/oxidative stress and mitochondrial function, as they are main cellular features of reperfusion damage...
April 20, 2018: Liver Transplantation
https://www.readbyqxmd.com/read/29679367/a-systematic-review-of-the-quality-of-reporting-of-simulation-studies-about-methods-for-the-analysis-of-complex-longitudinal-patient-reported-outcomes-data
#6
REVIEW
Aynslie M Hinds, Tolulope T Sajobi, Véronique Sebille, Richard Sawatzky, Lisa M Lix
PURPOSE: This study describes the characteristics and quality of reporting for published computer simulation studies about statistical methods to analyze complex longitudinal (i.e., repeated measures) patient-reported outcomes (PROs); we included methods for longitudinal latent variable measurement and growth models and response shift. METHODS: Scopus, PsycINFO, PubMed, EMBASE, and Social Science Citation Index were searched for English-language studies published between 1999 and 2016 using selected keywords...
April 20, 2018: Quality of Life Research
https://www.readbyqxmd.com/read/29679325/biofunctionalization-of-poly-acrylamide-gels
#7
Julieta I Paez, Aleeza Farrukh, Oya Ustahüseyin, Aránzazu Del Campo
Engineering novel biomaterials that mimic closer in vivo scenarios requires the simple and quantitative incorporation of multiple instructive signals to gain a higher level of control and complexity at the cell-matrix interface. Poly(acrylamide) (PAAm) gels are very popular among biology labs as 2D model substrates with defined biochemical and mechanical properties. These gels are cost effective, easy to prepare, reproducible, and available in a wide range of stiffness. However, their functionalization with bioactive ligands (cell adhesive proteins or peptides, growth factors, etc...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29679241/therapeutic-approaches-to-type-i-interferonopathies
#8
REVIEW
Marc Bienias, Normi Brück, Constanze Griep, Christine Wolf, Stefanie Kretschmer, Barbara Kind, Victoria Tüngler, Reinhard Berner, Min Ae Lee-Kirsch
To review recent scientific advances and therapeutic approaches in the expanding field of type I interferonopathies. Type I interferonopathies represent a genetically and phenotypically heterogenous group of disorders of the innate immune system caused by constitutive activation of antiviral type I interferon (IFN). Clinically, type I interferonopathies are characterized by autoinflammation and varying degrees of autoimmunity or immunodeficiency. The elucidation of the underlying genetic causes has revealed novel cell-intrinsic mechanisms that protect the organism against inappropriate immune recognition of self nucleic acids by cytosolic nucleic acid sensors...
April 20, 2018: Current Rheumatology Reports
https://www.readbyqxmd.com/read/29679132/-self-reported-vision-in-gerontological-health-services-research-and-practice-an-opening-plea
#9
REVIEW
J Köberlein-Neu, A Seifert, I Himmelsbach
The use of self-reported vision is an integral part of most population surveys and is primarily used for healthcare monitoring. Since the patient's assessment is not always consistent with the objectively measured clinical parameters, the majority of the literature looks critically at the adequacy of self-reported vision, particularly with respect to answering epidemiological questions; however, it is often misunderstood that self-reported vision measures far more than the directly derived information show...
April 20, 2018: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/29679011/human-kallikrein-related-peptidase-12-stimulates-endothelial-cell-migration-by-remodeling-the-fibronectin-matrix
#10
T Kryza, C Parent, J Pardessus, A Petit, J Burlaud-Gaillard, P Reverdiau, S Iochmann, V Labas, Y Courty, N Heuzé-Vourc'h
Kallikrein-related peptidase 12 (KLK12) is a kallikrein family peptidase involved in angiogenesis - a complex biological process in which the sprouting, migration and stabilization of endothelial cells requires extracellular matrix remodeling. To characterize the molecular mechanisms associated with KLK12's proangiogenic activity, we evaluated its ability to hydrolyze various matrix proteins. Our results show that KLK12 efficiently cleaved the human extracellular matrix proteins fibronectin and tenascin, both of which are involved in the regulation of endothelial cell adhesion and migration...
April 20, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29678905/phosphorylation-of-xiap-at-threonine-180-controls-its-activity-in-wnt-signaling
#11
Victoria H Ng, Brian I Hang, Leah M Sawyer, Leif R Neitzel, Emily E Crispi, Kristie L Rose, Tessa M Popay, Alison Zhong, Laura A Lee, William P Tansey, Stacey Huppert, Ethan Lee
X-linked Inhibitor of Apoptosis (XIAP) plays an important role in preventing apoptotic cell death. XIAP has been shown to participate in signaling pathways, including Wnt signaling. XIAP regulates Wnt signaling by promoting the monoubiquitination of the co-repressor Groucho/TLE, decreasing its affinity for TCF/Lef and allowing assembly of transcriptionally active β-catenin-TCF/Lef complexes. We now demonstrate that XIAP is phosphorylated by GSK3 at threonine 180 and that an alanine mutant (XIAPT180A ) exhibits decreased Wnt activity compared to wild-type XIAP in cultured human cells and in Xenopus embryos...
April 20, 2018: Journal of Cell Science
https://www.readbyqxmd.com/read/29678734/polymeric-micelle-mediated-delivery-of-half-sandwich-ruthenium-ii-complexes-with-phosphanes-derived-from-fluoroloquinolones-for-lung-adenocarcinoma-treatment
#12
Przemysław Kołoczek, Agnieszka Skórska-Stania, Agnieszka Cierniak, Victor Sebastian, Urszula K Komarnicka, Michał Płotek, Agnieszka Kyzioł
Novel half-sandwich ruthenium(II) complexes with aminomethyl(diphenyl)phosphine derived from fluoroloquinolones (RuPCp, RuPSf, RuPLm, RuPNr) were being investigated as alternatives to well-established metal-based chemotherapeutics. All compounds were characterized by elemental analysis, selected spectroscopic methods (i.e., absorption and fluorescence spectroscopy, ESI-MS, NMR, circular dichroizm), X-ray diffractometry, ICP-MS, and electrochemical techniques. To overcome low solubility, serious side effects connected with systemic cytotoxicity of ruthenium complexes, and acquiring the resistance of cancer cells, polymeric nanoformulations based on Pluronic P-123 micelles loaded with selected Ru(II) complexes were prepared and characterized...
April 17, 2018: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29678730/interaction-between-blood-and-solid-particles-propagating-through-a-capillary-with-slip-effects
#13
A Zeeshan, A Fatima, F Khalid, M M Bhatti
This article describes the interaction between solid particles and blood propagating through a capillary. A slip condition is considered on the walls of the capillary. The rheological features of the blood are discussed by considering as a two-phase Newtonian fluid model, i.e., the suspension of cells in plasma. A perturbation method is successfully applied to obtain the series solution of the governing coupled differential equations. The series solution for both fluid and particle phase are presented up to second order approximation...
April 17, 2018: Microvascular Research
https://www.readbyqxmd.com/read/29678716/surgical-management-of-medial-tentorial-meningioma-falcotentorial-and-torcular
#14
Andrea Talacchi, Antonio Biroli, Aurel Hasanbelliu, Francesca Locatelli
BACKGROUND: Falcotentorial meningiomas (FTM) stand out for their rarity, inconsistent definition, and surgical complexity. It is appropriate to deal with them in the context of medial tentorial meningiomas (MTM). METHODS: Clinical and radiological characteristics of MTM, comprising the typical features of FTM and tentorial meningioma (TM) along with surgical management, short- and long-term outcomes, are reported . RESULTS: FTM (n=16) were typically supratentorial, large, edematous tumors that caused mainly headache and hemianopia; TM (n=12) were infratentorial, smaller not edematous tumors that caused mainly headache and gait ataxia...
April 17, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29678568/likelihood-of-pregnancy-after-the-transfer-of-embryos-derived-from-follicle-aspiration-and-in-vitro-embryo-production-sessions-with-different-relative-efficiencies
#15
Luiz Fernando Feres, Luiz Gustavo Bruno Siqueira, Miller Pereira Palhao, Lívia Loiola Dos Santos, Felipe Zandonadi Brandao, Joao Henrique Moreira Viana
The aim of the present study was to evaluate the likelihood of pregnancy of in vitro-produced (IVP) embryos from batches with distinct relative efficiencies. Data were retrospectively analyzed from 605 transvaginal ultrasonic-guided follicle aspiration sessions (OPU) followed by in vitro embryo production (IVEP) and 2456 fresh embryo transfers (ET), performed between 2008 and 2012 in individuals of the Gir (dairy Bos indicus) breed. The OPU and IVEP were performed using standard procedures by a single group of technicians at the same laboratory facility...
April 15, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29678518/pattern-recognition-receptors-mediate-pro-inflammatory-effects-of-extracellular-mitochondrial-transcription-factor-a-tfam
#16
Stephanie M Schindler, Matthew G Frank, Jessica L Annis, Steven F Maier, Andis Klegeris
Neuroinflammation is a common pathogenic mechanism for a number of neurodegenerative disorders including Alzheimer's and Parkinson's diseases. Microglia, the immune cells of the brain, contribute to the onset and progression of the neuroinflammation observed in these diseases. Microglia become activated and initiate an inflammatory response by interacting with a diverse set of molecules, including the group of endogenous proteins released upon cell damage, termed damage-associated molecular patterns (DAMPs)...
April 17, 2018: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/29678326/the-effects-of-the-activation-of-the-inner-hair-cell-basolateral-k-channels-on-auditory-nerve-responses
#17
Alessandro Altoè, Ville Pulkki, Sarah Verhulst
The basolateral membrane of the mammalian inner hair cell (IHC) expresses large voltage and Ca2+ gated outward K+ currents. To quantify how the voltage-dependent activation of the K+ channels affects the functionality of the auditory nerve innervating the IHC, this study adopts a model of mechanical-to-neural transduction in which the basolateral K+ conductances of the IHC can be made voltage-dependent or not. The model shows that the voltage-dependent activation of the K+ channels (i) enhances the phase-locking properties of the auditory fiber (AF) responses; (ii) enables the auditory nerve to encode a large dynamic range of sound levels; (iii) enables the AF responses to synchronize precisely with the envelope of amplitude modulated stimuli; and (iv), is responsible for the steep offset responses of the AFs...
April 6, 2018: Hearing Research
https://www.readbyqxmd.com/read/29678301/molecular-pathways-for-antigenic-peptide-generation-by-er-aminopeptidase-1
#18
Anastasia Mpakali, Zachary Maben, Lawrence J Stern, Efstratios Stratikos
Endoplasmic Reticulum aminopeptidase 1 (ERAP1) is an intracellular enzyme that can generate or destroy potential peptide ligands for MHC class I molecules. ERAP1 activity influences the cell-surface immunopeptidome and epitope immunodominance patterns but in complex and poorly understood manners. Two main distinct pathways have been proposed to account for ERAP1's effects on the nature and quantity of MHCI-bound peptides: i) ERAP1 trims peptides in solution, generating the correct length for binding to MHCI or overtrimming peptides so that they are too short to bind, and ii) ERAP1 trims peptides while they are partially bound onto MHCI in manner that leaves the peptide amino terminus accessible...
April 17, 2018: Molecular Immunology
https://www.readbyqxmd.com/read/29678274/preoperative-mri-evaluation-of-lesion-nipple-distance-in-breast-cancer-patients-thresholds-for-predicting-occult-nipple-areola-complex-involvement
#19
G Mariscotti, M Durando, N Houssami, C M Berzovini, F Esposito, M Fasciano, P P Campanino, D Bosco, R Bussone, A Ala, I Castellano, A Sapino, L Bergamasco, P Fonio, G Gandini
AIM: To identify clinically occult nipple-areola complex (NAC) involvement using preoperative magnetic resonance imaging (MRI), to inform selection of patients eligible for nipple-sparing mastectomy (NSM) or skin-sparing mastectomy (SSM). MATERIAL AND METHODS: This was a retrospective study of 195 patients, who had preoperative breast MRI (February 2011 to January 2017) before undergoing surgical treatments (NSM or SSM) for newly diagnosed breast cancer. Tumour features at MRI (mass or non-mass lesion, diameter, lesion-NAC distance [LND]) and pathology (lesion diameter, histopathological type, receptor status) were recorded, as well as the type of surgery (NSM/SSM) and presence (NAC+) or absence (NAC-) of tumour at intraoperative evaluation of retroareolar tissue...
April 17, 2018: Clinical Radiology
https://www.readbyqxmd.com/read/29678141/evolving-in-the-highlands-the-case-of-the-neotropical-lerma-live-bearing-poeciliopsis-infans-woolman-1894-cyprinodontiformes-poeciliidae-in-central-mexico
#20
Rosa Gabriela Beltrán-López, Omar Domínguez-Domínguez, Rodolfo Pérez-Rodríguez, Kyle Piller, Ignacio Doadrio
BACKGROUND: Volcanic and tectonic activities in conjunction with Quaternary climate are the main events that shaped the geographical distribution of genetic variation of many lineages. Poeciliopsis infans is the only poeciliid species that was able to colonize the temperate highlands of central Mexico. We inferred the phylogenetic relationships, biogeographic history, and historical demography in the widespread Neotropical species P. infans and correlated this with geological events and the Quaternary glacial-interglacial climate in the highlands of central Mexico, using the mitochondrial genes Cytochrome b and Cytochrome oxidase I and two nuclear loci, Rhodopsin and ribosomal protein S7...
April 20, 2018: BMC Evolutionary Biology
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