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https://www.readbyqxmd.com/read/28937949/international-vision-care-issues-and-approaches
#1
Rohit C Khanna, Srinivas Marmamula, Gullapalli N Rao
Globally, 32.4 million individuals are blind and 191 million have moderate or severe visual impairment (MSVI); 80% of cases of blindness and MSVI are avoidable. However, great efforts are needed to tackle blindness and MSVI, as eye care in most places is delivered in isolation from and without significant integration with general health sectors. Success stories, including control of vitamin A deficiency, onchocerciasis, and trachoma, showed that global partnerships, multisectoral collaboration, public-private partnerships, corporate philanthropy, support from nongovernmental organizations-both local and international-and governments are responsible for the success of these programs...
September 15, 2017: Annual Review of Vision Science
https://www.readbyqxmd.com/read/28936210/novel-mutations-of-the-tetratricopeptide-repeat-domain-7a-gene-and-phenotype-genotype-comparison
#2
Reyin Lien, Yung-Feng Lin, Min-Wei Lai, Hui-Ying Weng, Ren-Chin Wu, Tang-Her Jaing, Jing-Long Huang, Shih-Feng Tsai, Wen-I Lee
The gastrointestinal tract contains the largest lymphoid organ to react with pathogenic microorganisms and suppress excess inflammation. Patients with primary immunodeficiency diseases (PIDs) can suffer from refractory diarrhea. In this study, we present two siblings who began to suffer from refractory diarrhea with a poor response to aggressive antibiotic and immunosuppressive treatment after surgical release of neonatal intestinal obstruction. Their lymphocyte proliferation was low, but superoxide production and IL-10 signaling were normal...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28935965/aromatic-side-chain-conformational-switch-on-the-surface-of-the-rna-recognition-motif-enables-rna-discrimination
#3
Nana Diarra Dit Konté, Miroslav Krepl, Fred F Damberger, Nina Ripin, Olivier Duss, Jiří Šponer, Frédéric H-T Allain
The cyclooxygenase-2 is a pro-inflammatory and cancer marker, whose mRNA stability and translation is regulated by the CUG-binding protein 2 interacting with AU-rich sequences in the 3' untranslated region. Here, we present the solution NMR structure of CUG-binding protein 2 RRM3 in complex with 5'-UUUAA-3' originating from the COX-2 3'-UTR. We show that RRM3 uses the same binding surface and protein moieties to interact with AU- and UG-rich RNA motifs, binding with low and high affinity, respectively. Using NMR spectroscopy, isothermal titration calorimetry and molecular dynamics simulations, we demonstrate that distinct sub-states characterized by different aromatic side-chain conformations at the RNA-binding surface allow for high- or low-affinity binding with functional implications...
September 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28935930/characterization-of-soft-amyloid-cores-in-human-prion-like-proteins
#4
Cristina Batlle, Natalia Sanchez de Groot, Valentin Iglesias, Susanna Navarro, Salvador Ventura
Prion-like behaviour is attracting much attention due to the growing evidences that amyloid-like self-assembly may reach beyond neurodegeneration and be a conserved functional mechanism. The best characterized functional prions correspond to a subset of yeast proteins involved in translation or transcription. Their conformational promiscuity is encoded in Prion Forming Domains (PFDs), usually long and intrinsically disordered protein segments of low complexity. The compositional bias of these regions seems to be important for the transition between soluble and amyloid-like states...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28926144/characterization-of-tp53-mutations-in-low-grade-myelodysplastic-syndromes-and-myelodysplastic-syndromes-with-a-non-complex-karyotype
#5
Wei Wang, Mark J Routbort, Zhenya Tang, Chi Young Ok, Keyur P Patel, Naval Daver, Guillermo Garcia-Manero, L Jeffrey Medeiros, Sa A Wang
OBJECTIVES: Although commonly associated with high-grade myelodysplastic syndrome (MDS) and MDS with a complex karyotype, TP53 mutations also occur in low-grade MDS and MDS with a non-complex karyotype. In latter cases, their clinicopathological features and the characteristics of TP53 mutations remain poorly characterized. METHODS: 176 MDS cases with TP53 mutations were stratified and characterized based on their karyotype and histologic subtype. RESULTS: Among 176 cases, 17% had a non-complex karyotype and 24% were low-grade MDS...
September 19, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28924037/intrinsically-disordered-sequences-enable-modulation-of-protein-phase-separation-through-distributed-tyrosine-motifs
#6
Yuan Lin, Simon L Currie, Michael Keith Rosen
Liquid-liquid phase separation (LLPS) is thought to contribute to establishment of many biomolecular condensates, eukaryotic cell structures that concentrate diverse macromolecules but lack a bounding membrane. RNA granules control RNA metabolism and comprise a large class of condensates that are enriched in RNA-binding proteins and RNA molecules. Many RNA granule proteins are composed of both modular domains and intrinsically disordered regions (IDRs) having low amino acid sequence complexity. Phase separation of these molecules likely plays an important role in the generation and stability of RNA granules...
September 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28920939/imaging-and-tuning-polarity-at-srtio3-domain%C3%A2-walls
#7
Yiftach Frenkel, Noam Haham, Yishai Shperber, Christopher Bell, Yanwu Xie, Zhuoyu Chen, Yasuyuki Hikita, Harold Y Hwang, Ekhard K H Salje, Beena Kalisky
Electrostatic fields tune the ground state of interfaces between complex oxide materials. Electronic properties, such as conductivity and superconductivity, can be tuned and then used to create and control circuit elements and gate-defined devices. Here we show that naturally occurring twin boundaries, with properties that are different from their surrounding bulk, can tune the LaAlO3/SrTiO3 interface 2DEG at the nanoscale. In particular, SrTiO3 domain boundaries have the unusual distinction of remaining highly mobile down to low temperatures, and were recently suggested to be polar...
September 18, 2017: Nature Materials
https://www.readbyqxmd.com/read/28920895/matched-filtering-for-heart-rate-estimation-on-compressive-sensing-ecg-measurements
#8
Giulia Da Poian, Christopher J Rozell, Riccardo Bernardini, Roberto Rinaldo, Gari D Clifford
OBJECTIVE: Compressive Sensing (CS) has recently been applied as a low complexity compression framework for long-term monitoring of electrocardiogram signals using Wireless Body Sensor Networks. Long-term recording of ECG signals can be useful for diagnostic purposes and to monitor the evolution of several widespread diseases. In particular, beat to beat intervals provide important clinical information, and these can be derived from the ECG signal by computing the distance between QRS complexes (R-peaks)...
September 14, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28919577/some-properties-of-three-%C3%AE-b-crystallin-mutants-carrying-point-substitutions-in-the-c-terminal-domain-and-associated-with-congenital-diseases
#9
Evgenia S Gerasimovich, Sergei V Strelkov, Nikolai B Gusev
Physico-chemical properties of G154S, R157H and A171T mutants of αB-crystallin (HspB5) associated with congenital human diseases including certain myopathies and cataract were investigated. Oligomers formed by G154S and A171T mutants have the size and apparent molecular weight indistinguishable from those of the wild-type HspB5, whereas the size of oligomers formed by R157H mutant is slightly smaller. All mutants are less thermostable and start to aggregate at a lower temperature than the wild-type protein...
September 14, 2017: Biochimie
https://www.readbyqxmd.com/read/28918549/loss-of-lhci-system-affects-lhcii-re-distribution-between-thylakoid-domains-upon-state-transitions
#10
Mauro Bressan, Roberto Bassi, Luca Dall'Osto
LHCI, the peripheral antenna system of Photosystem I, includes four light-harvesting proteins (Lhca1-Lhca4) in higher plants, all of which are devoid in the Arabidopsis thaliana knock-out mutant ΔLhca. PSI absorption cross-section was reduced in the mutant, thus affecting the redox balance of the photosynthetic electron chain and resulting in a more reduced PQ with respect to the wild type. ΔLhca plants developed compensatory response by enhancing LHCII binding to PSI. However, the amplitude of state transitions, as measured from changes of chlorophyll fluorescence in vivo, was unexpectedly low than the high level of PSI-LHCII supercomplex established...
September 16, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28917733/stabilization-of-gas-phase-uranyl-complexes-enables-rapid-speciation-using-electrospray-ionization-and-ion-mobility-mass-spectrometry
#11
Austen L Davis, Brian H Clowers
Significant challenges exist when characterizing f-element complexes in solution using traditional approaches such as electrochemical and spectroscopic techniques as they do not always capture information for lower abundance species. However, provided a metal-complex with sufficient stability, soft ionization techniques such as electrospray offer a means to quantify and probe the characteristics of such systems using mass spectrometry. Unfortunately, the gas-phase species observed in ESI-MS systems do not always reflect the solution phase distributions due to the inherent electrochemical mechanism of the electrospray process, ion transfer from ambient to low pressures conditions, and other factors that are related to droplet evaporation...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28916189/phosphoinositide-5-phosphatase-activities-control-cell-motility-in-glioblastoma-two-phosphoinositides-pi-4-5-p2-and-pi-3-4-p2-are-involved
#12
REVIEW
Ana Raquel Ramos, William's Elong Edimo, Christophe Erneux
Inositol polyphosphate 5-phosphatases or phosphoinositide 5-phosphatases (PI 5-phosphatases) are enzymes that can act on soluble inositol phosphates and/or phosphoinositides (PIs). Several PI 5-phosphatases have been linked to human genetic diseases, in particular the Lowe protein or OCRL which is mutated in the Lowe syndrome. There are 10 different members of this family and 9 of them can use PIs as substrate. One of these substrates, PI(3,4,5)P3 binds to specific PH domains and recruits as effectors specific proteins to signaling complexes...
September 5, 2017: Advances in Biological Regulation
https://www.readbyqxmd.com/read/28914900/cycle-slip-less-low-complexity-phase-recovery-algorithm-for-coherent-optical-receivers
#13
Valery Nobl Rozental, Deming Kong, Benjamin Foo, Bill Corcoran, Arthur James Lowery
We propose and experimentally validate a blind phase recovery algorithm based on tracking low-frequency components of the phase noise, which we call "filtered carrier-phase estimation (F-CPE)." Tracking only the low-frequency components allows F-CPE to reduce the computational complexity by using a frequency-domain equalizer and to simplify the partitioning of a 16 quadrature amplitude modulation (16QAM) constellation. Further, this approach eliminates cycle slips by suppressing the impact of amplified spontaneous emission on phase noise estimation...
September 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28912534/multisegmented-nanowires-a-step-towards-the-control-of-the-domain-wall-configuration
#14
E Berganza, M Jaafar, C Bran, J A Fernández-Roldán, O Chubykalo-Fesenko, M Vázquez, A Asenjo
Cylindrical nanowires synthesized by controlled electrodeposition constitute excellent strategic candidates to engineer magnetic domain configurations. In this work, multisegmented CoNi/Ni nanowires are synthesized for tailoring a periodic magnetic structure determined by the balance between magnetocrystalline and magnetostatic energies. High-resolution Transmission Electron Microscopy confirms the segmented growth and the sharp transition between layers. Although both CoNi and Ni segments have similar fcc cubic crystal symmetry, their magnetic configuration is quite different as experimentally revealed by Magnetic Force Microscopy (MFM) imaging...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28911120/phirex-a-programmable-and-red-light-regulated-protein-expression-switch-for-yeast
#15
Lena Hochrein, Fabian Machens, Katrin Messerschmidt, Bernd Mueller-Roeber
Highly regulated induction systems enabling dose-dependent and reversible fine-tuning of protein expression output are beneficial for engineering complex biosynthetic pathways. To address this, we developed PhiReX, a novel red/far-red light-regulated protein expression system for use in Saccharomyces cerevisiae. PhiReX is based on the combination of a customizable synTALE DNA-binding domain, the VP64 activation domain and the light-sensitive dimerization of the photoreceptor PhyB and its interacting partner PIF3 from Arabidopsis thaliana...
September 6, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28905122/static-and-free-vibration-analyses-of-dental-prosthesis-and-atherosclerotic-human-artery-by-refined-finite-element-models
#16
E Carrera, D Guarnera, A Pagani
Static and modal responses of representative biomechanical structures are investigated in this paper by employing higher-order theories of structures and finite element approximations. Refined models are implemented in the domain of the Carrera unified formulation (CUF), according to which low- to high-order kinematics can be postulated as arbitrary and, eventually, hierarchical expansions of the generalized displacement unknowns. By using CUF along with the principle of virtual work, the governing equations are expressed in terms of fundamental nuclei of finite element arrays...
September 13, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28900819/a-homozygous-pigo-mutation-associated-with-severe-infantile-epileptic-encephalopathy-and-corpus-callosum-hypoplasia-but-normal-alkaline-phosphatase-levels
#17
Yoav Zehavi, Anja von Renesse, Etty Daniel-Spiegel, Yonatan Sapir, Luci Zalman, Ilana Chervinsky, Markus Schuelke, Rachel Straussberg, Ronen Spiegel
We describe two sisters from a consanguineous Arab family with global developmental delay, dystrophy, axial hypotonia, epileptic encephalopathy dominated by intractable complex partial seizures that were resistant to various anti-epileptic treatments. Dysmorphic features comprised low set ears, hypertelorism, upslanting palpebral fissures, a broad nasal bridge, and blue sclera with elongated eyelashes. Brain MRI in both children showed a corpus callosum hypoplasia that was evident already in utero and evolving cortical atrophy...
September 13, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28892182/health-related-quality-of-life-in-patients-with-lymphoedema-a-cross-sectional-study
#18
Pia Klernäs, Aina Johnsson, Vibeke Horstmann, Karin Johansson
INTRODUCTION: Lymphoedema may cause complex problems that can strongly influence patients' health-related quality of life (HRQoL). The main purpose of this study was to investigate the impact of lymphoedema on HRQoL in patients with varying forms of lymphoedema. METHODS: The Lymphoedema Quality of Life Inventory (LyQLI), measuring three domains, physical, psychosocial and practical, and the Short Form 36 Health Survey Questionnaire (SF-36), measuring eight health domains, were sent to 200 lymphoedema patients...
September 11, 2017: Scandinavian Journal of Caring Sciences
https://www.readbyqxmd.com/read/28891109/strengthening-community-mental-health-competence-a-realist-informed-case-study-from-dehradun-north-india
#19
Kaaren Mathias, Jeph Mathias, Isabel Goicolea, Michelle Kermode
Few accounts exist of programmes in low- and middle-income countries seeking to strengthen community knowledge and skills in mental health. This case study uses a realist lens to explore how a mental health project in a context with few mental health services, strengthened community mental health competence by increasing community knowledge, creating safer social spaces and engaging partnerships for action. We used predominantly qualitative methods to explore relationships between context, interventions, mechanisms and outcomes in the "natural setting" of a community-based mental health project in Dehradun district, Uttarakhand, North India...
September 11, 2017: Health & Social Care in the Community
https://www.readbyqxmd.com/read/28887874/small-molecule-inhibition-of-murf1-attenuates-skeletal-muscle-atrophy-and-dysfunction-in-cardiac-cachexia
#20
Thomas Scott Bowen, Volker Adams, Sarah Werner, Tina Fischer, Paulien Vinke, Maria Noel Brogger, Norman Mangner, Axel Linke, Peter Sehr, Joe Lewis, Dittmar Labeit, Alexander Gasch, Siegfried Labeit
BACKGROUND: Muscle ring finger 1 (MuRF1) is a muscle-specific ubiquitin E3 ligase activated during clinical conditions associated with skeletal muscle wasting. Yet, there remains a paucity of therapeutic interventions that directly inhibit MuRF1 function, particularly in vivo. The current study, therefore, developed a novel compound targeting the central coiled coil domain of MuRF1 to inhibit muscle wasting in cardiac cachexia. METHODS: We identified small molecules that interfere with the MuRF1-titin interaction from a 130 000 compound screen based on Alpha Technology...
September 8, 2017: Journal of Cachexia, Sarcopenia and Muscle
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