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https://www.readbyqxmd.com/read/27926936/scaling-properties-of-dimensionality-reduction-for-neural-populations-and-network-models
#1
Ryan C Williamson, Benjamin R Cowley, Ashok Litwin-Kumar, Brent Doiron, Adam Kohn, Matthew A Smith, Byron M Yu
Recent studies have applied dimensionality reduction methods to understand how the multi-dimensional structure of neural population activity gives rise to brain function. It is unclear, however, how the results obtained from dimensionality reduction generalize to recordings with larger numbers of neurons and trials or how these results relate to the underlying network structure. We address these questions by applying factor analysis to recordings in the visual cortex of non-human primates and to spiking network models that self-generate irregular activity through a balance of excitation and inhibition...
December 2016: PLoS Computational Biology
https://www.readbyqxmd.com/read/27926854/structural-characterization-and-statistical-mechanical-model-of-epidermal-patterns
#2
Duyu Chen, Wen Yih Aw, Danelle Devenport, Salvatore Torquato
In proliferating epithelia of mammalian skin, cells of irregular polygon-like shapes pack into complex, nearly flat two-dimensional structures that are pliable to deformations. In this work, we employ various sensitive correlation functions to quantitatively characterize structural features of evolving packings of epithelial cells across length scales in mouse skin. We find that the pair statistics in direct space (correlation function) and Fourier space (structure factor) of the cell centroids in the early stages of embryonic development show structural directional dependence (statistical anisotropy), which is a reflection of the fact that cells are stretched, which promotes uniaxial growth along the epithelial plane...
December 6, 2016: Biophysical Journal
https://www.readbyqxmd.com/read/27926794/metastatic-type-a-thymoma-morphologic-and-genetic-correlation
#3
Tobias Bürger, Inga-Marie Schaefer, Stefan Küffer, Hanibal Bohnenberger, Kirsten Reuter-Jessen, John Kwok-Cheung Chan, Alexander Emmert, Marc Hinterthaner, Alexander Marx, Philipp Ströbel
INTRODUCTION: The vast majority of type A thymomas are diagnosed in tumor stage 1 or 2, and metastatic cases are exceedingly rare. The histological and genetic features of such metastatic type A thymomas have not been described in detail. METHODS: Five metastatic type A thymomas in tumor stage Masaoka IVb that had been reviewed by a panel of expert pathologists were analyzed using comparative genomic hybridization (CGH). All cases had metastasized to the lungs. RESULTS: Cases #1, 2 and 3 showed the prototypic morphology of type A thymomas with mostly solid growth patterns...
December 7, 2016: Histopathology
https://www.readbyqxmd.com/read/27926754/cone-photoreceptor-irregularity-on-adaptive-optics-scanning-laser-ophthalmoscopy-correlates-with-severity-of-diabetic-retinopathy-and-macular-edema
#4
Jan Lammer, Sonja G Prager, Michael C Cheney, Amel Ahmed, Salma H Radwan, Stephen A Burns, Paolo S Silva, Jennifer K Sun
Purpose: To determine whether cone density, spacing, or regularity in eyes with and without diabetes (DM) as assessed by high-resolution adaptive optics scanning laser ophthalmoscopy (AOSLO) correlates with presence of diabetes, diabetic retinopathy (DR) severity, or presence of diabetic macular edema (DME). Methods: Participants with type 1 or 2 DM and healthy controls underwent AOSLO imaging of four macular regions. Cone assessment was performed by independent graders for cone density, packing factor (PF), nearest neighbor distance (NND), and Voronoi tile area (VTA)...
December 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27925648/sonographic-evaluation-of-intrathyroid-metastases
#5
J Matthew Debnam, Michael Kwon, Bruno D Fornage, Savitri Krishnamurthy, Gary L Clayman, Beth S Edeiken-Monroe
OBJECTIVES: Intrathyroid metastases from extrathyroid primary tumors are rare. Clinical findings may be subtle, but detection of intrathyroid metastases has improved with sonography. The objective of this study was to evaluate the sonographic appearance of intrathyroid metastases. METHODS: Patients with thyroid masses with cytopathologic features matching those of an extrathyroid primary tumor were retrospectively identified. The appearances of intrathyroid metastases on sonography were reviewed for the following features: size, margin regularity, echogenicity, echotexture, vascularity on power or color Doppler ultrasonography, and the presence or absence of any associated cervical adenopathy...
December 7, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/27925238/danshen-enhanced-cardioprotective-effect-of-cardioplegia-on-ischemia-reperfusion-injury-in-a-human-induced-pluripotent-stem-cell-derived-cardiomyocytes-model
#6
Wei Wei, Yiwei Liu, Qiang Zhang, Yangming Wang, Xiaoling Zhang, Hao Zhang
Myocardial ischemia-reperfusion (I/R) injury is unavoidable during cardioplegic arrest and open-heart surgery. Danshen is one of the most popular traditional herbal medicines in China, which has entered the Food and Drug Administration-approved phase III clinical trial. This study was aimed to develop a human-induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) model to mimic I/R injury and evaluate the cardioprotective effect of regular cardioplegic solution with Danshen. hiPSC-CMs were cultured with the crystalloid cardioplegic solution (Thomas group) and Thomas solution with 2 or 10 µg/mL Danshen (Thomas plus Danshen groups)...
December 7, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27923378/congenital-cytomegalovirus-related-intestinal-malrotation-a-case-report
#7
Claudia Colomba, Mario Giuffrè, Simona La Placa, Antonio Cascio, Marcello Trizzino, Simona De Grazia, Giovanni Corsello
BACKGROUND: Cytomegalovirus is the most common cause of congenital infection in the developed countries. Gastrointestinal involvement has been extensively described in both adult and paediatric immunocompromised patients but it is infrequent in congenital or perinatal CMV infection. CASE PRESENTATION: We report on a case of coexistent congenital Cytomegalovirus infection with intestinal malrotation and positive intestinal Cytomegalovirus biopsy. At birth the neonate showed clinical and radiological evidence of intestinal obstruction...
December 7, 2016: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/27923290/computerised-analysis-of-antepartum-foetal-heart-parameters-new-reference-ranges
#8
Natascia Giuliano, Maria Laura Annunziata, Francesca Giovanna Esposito, Salvatore Tagliaferri, Andrea Di Lieto, Giovanni Magenes, Maria Gabriella Signorini, Marta Campanile, Domenico Arduini
We selected 4012 cCTG records (one trace for each patient) performed in healthy pregnancies from 30th to 42nd gestational week using foetal heart rate (FHR), short-term variability (STV), long-term irregularity (LTI), Delta, approximate entropy (ApEn), spectral components as low frequency (LF), median frequency (MF), high frequency (HF) and LF/(HF + MF) ratio were analysed. Reference nomograms were created and sensitivity and specificity for the prediction of foetal compromise were calculated which were 90% and 89%, respectively...
December 6, 2016: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/27923141/development-and-characterization-of-electrosprayed-alyssum-homolocarpum-seed-gum-nanoparticles-for-encapsulation-of-d-limonene
#9
Khadije Khoshakhlagh, Arash Koocheki, Mohebbat Mohebbi, Alireza Allafchian
In this study, the feasibility of developing Alyssum homolocarpum seed gum (AHSG) nanocapsules containing d-limonene by electrospraying has been investigated. d-limonene emulsions with constant AHSG (0.5% w/w) and various flavor concentrations (10-30% based on gum weight) with 0.1% Tween 20 were electrosprayed at 20kV and 0.1ml/h of flow rate. The effects of key parameters of emulsions (rheological properties, droplet size, surface tension and electrical conductivity) on the morphology of structures have been studied...
November 21, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27922816/the-progeroid-gene-bubr1-regulates-axon-myelination-and-motor-function
#10
Chan-Il Choi, Ki Hyun Yoo, Syed Mohammed Qasim Hussaini, Byeong Tak Jeon, John Welby, Haiyun Gan, Isobel A Scarisbrick, Zhiguo Zhang, Darren J Baker, Jan M van Deursen, Moses Rodriguez, Mi-Hyeon Jang
Myelination, the process by which oligodendrocytes form the myelin sheath around axons, is key to axonal signal transduction and related motor function in the central nervous system (CNS). Aging is characterized by degenerative changes in the myelin sheath, although the molecular underpinnings of normal and aberrant myelination remain incompletely understood. Here we report that axon myelination and related motor function are dependent on BubR1, a mitotic checkpoint protein that has been linked to progeroid phenotypes when expressed at low levels and healthy lifespan when overabundant...
September 12, 2016: Aging
https://www.readbyqxmd.com/read/27922663/norspermidine-changes-the-basic-structure-of-s-%C3%A2-mutans-biofilm
#11
Meizhen Ou, Junqi Ling
The factors regulating the assembly of the three-dimensional structure of Streptococcus mutans biofilms remain obscure. Polyamines are essential in biofilm formation of certain bacteria. Norspermidine, an unusual polyamine, has been a controversial polyamine that can lead to biofilm disassembly. However, the role of norspermidine in S. mutans biofilms remains unknown. Therefore, the present study investigated the impact of norspermidine on S. mutans biofilms. The different architectures of the biofilms in norspermidine and control groups indicated that the basic units, bacteria‑exopolysaccharide units (BEUs), represent the exopolysaccharide (EPS) and bacterial assembly pattern in S...
December 5, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27922549/unreported-side-effect-of-intravitreal-diclofenac-in-chronic-diabetic-macular-edema
#12
Lavanya Chidambara, Rekha Singhal, Priya Srinivasan, Naresh Kumar Yadav
PURPOSE: To evaluate the safety and efficacy of intravitreal diclofenac sodium. METHODS: A 61-year-old male with persistent diabetic macular edema was treated with 450 μg of intravitreal diclofenac sodium (systemic preparation). RESULTS: Postinjection Day 1, the spectral domain optical coherence tomography showed irregular vitreoretinal interface with wrinkling and separation of the internal limiting membrane from the nerve fiber layer with homogeneity of the inner layers...
December 2, 2016: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/27922241/an-unusual-case-of-neuroblastoma-a-17-year-old-adolescent-presented-with-bilateral-diffuse-lung-metastasis-at-initial-diagnosis
#13
Çağlar Ödek, Tanıl Kendirli, Esra Pekpak, Ayhan Yaman, Başak Adaklı-Aksoy, Handan Dinçaslan, Nurdan Taçyıldız, Emel Ünal, Erdal İnce, Gülsan Yavuz
Neuroblastoma (NB) is the most frequently diagnosed neoplasm during infancy and its incidence declines within the first 3-5 years of life. It can be rarely diagnosed in adolescents and young adults. Adolescents have advanced stage of disease, higher frequency of uncommon metastatic sites such as lungs, and worse outcomes. Herein, we describe an unusual case of NB in a 17-year-old adolescent presented with lung metastasis at diagnosis. The patient was diagnosed with stage IV NB. Thorax high-resolution computed tomography (HRCT) scan revealed irregular septal thickening with ground glass opacity consistent with pulmonary parenchymal metastases...
2016: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/27921053/metastatic-esophageal-cancer-presenting-as-an-orbital-mass
#14
Sunil Pokharel, Ghassan Kabbach, Seth J Richter, Laura Chiu
We report a case of adenocarcinoma of the esophagus presenting as an orbital metastasis prior to the primary diagnosis. A 66-year-old white male presented to his ophthalmologist with right orbital swelling for several months. Magnetic resonance imaging revealed a supraorbital infiltrative mass. Pathology from the mass revealed findings consistent with adenocarcinoma of gastrointestinal origin. Upper endoscopy revealed distal esophageal stricture and irregularities. Pathology from the esophagus showed the same malignancy found in the orbit...
August 2016: ACG Case Reports Journal
https://www.readbyqxmd.com/read/27920494/presence-or-absence-of-ocular-surface-inflammation-directs-clinical-and-therapeutic-management-of-dry-eye
#15
Robert Sambursky
BACKGROUND: The presence of clinically significant inflammation has been confirmed in the tears of 40%-65% of patients with symptoms of dry eye. Ocular surface inflammation may lead to tear film instability, epithelial cell irregularities, and permeability, resulting in chronic symptomatic pain and fluctuating vision as well as negative surgical outcomes. PATIENTS AND METHODS: A retrospective single center medical chart review of 100 patients was conducted. All patients were tested with the InflammaDry test to determine if patients exhibited elevated levels of matrix metalloproteinase 9 (MMP-9)...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27920430/biomimetic-antimicrobial-cloak-by-graphene-oxide-agar-hydrogel
#16
Massimiliano Papi, Valentina Palmieri, Francesca Bugli, Marco De Spirito, Maurizio Sanguinetti, Carlotta Ciancico, Maria Chiara Braidotti, Silvia Gentilini, Luca Angelani, Claudio Conti
Antibacterial surfaces have an enormous economic and social impact on the worldwide technological fight against diseases. However, bacteria develop resistance and coatings are often not uniform and not stable in time. The challenge is finding an antibacterial coating that is biocompatible, cost-effective, not toxic, and spreadable over large and irregular surfaces. Here we demonstrate an antibacterial cloak by laser printing of graphene oxide hydrogels mimicking the Cancer Pagurus carapace. We observe up to 90% reduction of bacteria cells...
December 2016: Scientific Reports
https://www.readbyqxmd.com/read/27920092/definition-discrimination-diagnosis-and-treatment-of-central-breathing-disturbances-during-sleep
#17
Winfried Randerath, Johan Verbraecken, Stefan Andreas, Michael Arzt, Konrad E Bloch, Thomas Brack, Bertien Buyse, Wilfried De Backer, Danny Joel Eckert, Ludger Grote, Lars Hagmeyer, Jan Hedner, Poul Jennum, Maria Teresa La Rovere, Carla Miltz, Walter T McNicholas, Josep Montserrat, Matthew Naughton, Jean-Louis Pepin, Dirk Pevernagie, Bernd Sanner, Dries Testelmans, Thomy Tonia, Bart Vrijsen, Peter Wijkstra, Patrick Levy
The complexity of central breathing disturbances during sleep has become increasingly obvious. They present as central sleep apnoeas (CSAs) and hypopnoeas, periodic breathing with apnoeas, or irregular breathing in patients with cardiovascular, other internal or neurological disorders, and can emerge under positive airway pressure treatment or opioid use, or at high altitude. As yet, there is insufficient knowledge on the clinical features, pathophysiological background and consecutive algorithms for stepped-care treatment...
December 5, 2016: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/27918303/a-one-dimensional-zinc-ii-coordination-polymer-with-a-three-dimensional-supramolecular-architecture-incorporating-1-1h-benzimidazol-2-yl-methyl-1h-tetrazole-and-adipate
#18
Chun Li Liu, Qiu Ying Huang, Xiang Ru Meng
The synthesis of coordination polymers or metal-organic frameworks (MOFs) has attracted considerable interest owing to the interesting structures and potential applications of these compounds. It is still a challenge to predict the exact structures and compositions of the final products. A new one-dimensional coordination polymer, catena-poly[[[bis{1-[(1H-benzimidazol-2-yl)methyl]-1H-tetrazole-κN(3)}zinc(II)]-μ-hexane-1,6-dicarboxylato-κ(4)O(1),O(1'):O(6),O(6')] monohydrate], {[Zn(C6H8O4)(C9H8N6)2]·H2O}n, has been synthesized by the reaction of Zn(Ac)2 (Ac is acetate) with 1-[(1H-benzimidazol-2-yl)methyl]-1H-tetrazole (bimt) and adipic acid (H2adi) at room temperature...
December 1, 2016: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/27918234/formation-and-exudation-of-non-volatile-products-of-the-arabidiol-triterpenoid-degradation-pathway-in-arabidopsis-roots
#19
Reza Sohrabi, Tehane Ali, Liva Harinantenaina Rakotondraibe, Dorothea Tholl
Triterpenoids produced by plants play important roles in the protection against biotic stress. Roots of Arabidopsis thaliana produce different triterpenoids, which include the tricyclic triterpene diol, arabidiol. In a degradation reaction induced by infection with the oomycete pathogen, Pythium irregulare, arabidiol is cleaved to the 11-carbon volatile homoterpene, (E)-4,8-dimethyl-1,3,7-nonatriene (DMNT), and the 19-carbon ketone, apo-arabidiol. The arabidiol pathway and its volatile breakdown product DMNT have been implicated in the defense against P...
December 5, 2016: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/27917133/the-salience-of-complex-words-and-their-parts-which-comes-first
#20
REVIEW
Hélène Giraudo, Serena Dal Maso
This paper deals with the impact of the salience of complex words and their constituent parts on lexical access. While almost 40 years of psycholinguistic studies have focused on the relevance of morphological structure for word recognition, little attention has been devoted to the relationship between the word as a whole unit and its constituent morphemes. Depending on the theoretical approach adopted, complex words have been seen either in the light of their paradigmatic environment (i.e., from a paradigmatic view), or in terms of their internal structure (i...
2016: Frontiers in Psychology
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