342 resultados para Siro, Paavo
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Mode of access: Internet.
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Mode of access: Internet.
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Includes index.
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The muscle isoform. of clathrin heavy chain, CHC22, has 85% sequence identity to the ubiquitously expressed CHC17, yet its expression pattern and function appear to be distinct from those of well-characterized clathrin-coated vesicles. In mature muscle CHC22 is preferentially concentrated at neuromuscular and myotendinous junctions, suggesting a role at sarcolemmal contacts with extracellular matrix. During myoblast differentiation, CHC22 expression is increased, initially localized with desmin and nestin and then preferentially segregated to the poles of fused myoblasts. CHC22 expression is also increased in regenerating muscle fibers with the same time course as embryonic myosin, indicating a role in muscle repair. CHC22 binds to sorting nexin 5 through a coiled-coil domain present in both partners, which is absent in CHC17 and coincides with the region on CHC17 that binds the regulatory light-chain subunit. These differential binding data suggest a mechanism for the distinct functions of CHC22 relative to CHC17 in membrane traffic during muscle development, repair, and at neuromuscular and myotendinous junctions.
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The purpose of this study was to compare the robustness of the event-related potential (ERP) response, called the mismatch negativity (MMN), when elicited by simple tone stimuli (differing in frequency, duration, or intensity) and speech stimuli (CV nonword contrast /de:/ vs. /ge:/ and CV word contrast /deI/ vs. /geI/). The study was conducted using 30 young adult subjects (Groups A and B; n = 15 each). The speech stimuli were presented to Group A at a stimulus onset asynchrony (SOA) of 610 msec and to Group B at an SOA of 900 msec. The tone stimuli were presented to both groups at an SOA of 610 msec. MMN responses were elicited by the simple tone stimuli (66.7%-96.7% of subjects with MMN "present," or significantly different from zero, p < 0.05) but not the speech stimuli (10% subjects with MMN present for nonwords, 10% for words). The length of the SOA (610 msec or 900 msec) had no effect on the ability to obtain consistent MMN responses to the speech stimuli. The results indicated a lack of robust MMN elicited by speech stimuli with fine acoustic contrasts under carefully controlled methodological conditions. The implications of these results are discussed in relation to conflicting reports in the literature of speech-elicited MMNs, and the importance of appropriate methodological design in MMN studies investigating speech processing in normal and pathological populations.
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Esta pesquisa visa analisar a mensagem de Javé transmitida através do profeta Isaías em meio à guerra siro-efraimita (734-732 a.C.), no tempo do rei Acaz. A primeira parte deste trabalho fornece uma panorâmica histórica da situação tanto internacional quanto nacional da nação de Judá. No meio de sinais de guerras, invasões estrangeiras, desolação e aumento de tributos que acarretam maior insegurança para os setores mais empobrecidos, Javé faz sua aposta pela vida de Israel. Através do oráculo profético mo stra um caminho que pode chegar a subverter a ordem de um injusto sistema político advindo do próprio pecado da nação de Israel. Neste texto, santificar a Javé é a trilha que pode livrar-lhes da queda e da destruição. Santificar a Javé significa cuidar e preservar a vida, especialmente dos mais desprotegidos. Isto implica optar conscientemente por uma nova ordem que garanta uma existência digna para todos e todas. O objetivo desta pesquisa é entender como o conceito de santificação salientado pelo profeta Isaías, na perícope (Is 8,11-15), pode ajudar-nos a superar os problemas cotidianos e fornecer-nos novas posturas éticas para enfrentar a vida, isto é um conceito de santificação que requer do engajamento com o povo, fundamentalmente com a população mais carente e necessitada atualmente. Por meio do trabalho exegético tentamos encontrar respostas escondidas entre palavras, termos e frases, procurando entender o texto em diálogo com a vida cotidiana de seu tempo e do nosso. Este estudo pretende providenciar subsídios para a leitura popular da Bíblia que está sendo realizada por muitos grupos nas igrejas e comunidades cristãs, que buscam novos caminhos, horizontes, sonhos e utopias para continuar a viver em meio de sociedades em crises e de tempos difíceis.(AU)
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Lipids are a highly diverse class of biomolecules, with an average eukaryotic cell estimated as containing at least 100,000 different species. The significance of this diversity is still poorly understood, yet it has become clear that lipids have critical regulatory as well as structural roles, varying from signaling (e.g. phosphatidylinositols, prostaglandins, platelet activating factor, ceramide) to the control of permeability properties of skin, for instance. An unprecedented discovery from recent efforts in lipidomics, aimed at the elucidation of the functional roles of lipids in cells, was the key role for lipid oxidation in cell behavior and pathology. More specifically, oxidized phospholipids (oxPL) have been shown to increase significantly in apoptosis as well as in inflammation and to be involved in several pathological conditions, such as atherosclerosis, cancer, inflammation, Alzheimer's and Parkinson's disease, as well as type 2 diabetes, with the detailed mechanisms remaining to be established. However, a coherent overall view of the causalities and mechanisms has been lacking, mainly because of insufficient understanding of the cellular as well as molecular level mechanisms. This Special Issue represents a focused, integrated interdisciplinary approach summarizing very recent leading edge developments in this emerging field with emphasis on lipid–protein interactions. The data now becoming available are paving the way to the development of improved diagnostics, therapies and preventive measures to combat the above diseases.
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Dyslexia is one of the most common childhood disorders with a prevalence of around 5-10% in school-age children. Although an important genetic component is known to have a role in the aetiology of dyslexia, we are far from understanding the molecular mechanisms leading to the disorder. Several candidate genes have been implicated in dyslexia, including DYX1C1, DCDC2, KIAA0319, and the MRPL19/C2ORF3 locus, each with reports of both positive and no replications. We generated a European cross-linguistic sample of school-age children-the NeuroDys cohort-that includes more than 900 individuals with dyslexia, sampled with homogenous inclusion criteria across eight European countries, and a comparable number of controls. Here, we describe association analysis of the dyslexia candidate genes/locus in the NeuroDys cohort. We performed both case-control and quantitative association analyses of single markers and haplotypes previously reported to be dyslexia-associated. Although we observed association signals in samples from single countries, we did not find any marker or haplotype that was significantly associated with either case-control status or quantitative measurements of word-reading or spelling in the meta-analysis of all eight countries combined. Like in other neurocognitive disorders, our findings underline the need for larger sample sizes to validate possibly weak genetic effects. © 2014 Macmillan Publishers Limited All rights reserved.
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Los lectores encontrarán en este texto ponderación y buen juicio en un tema que sigue siendo discutido por muchos con gran entusiasmo. Estas narrativas jurídicas nos exponen varias visiones del derecho humano a la alimentación desde diferentes ángulos –teórico y práctico– y de diferentes latitudes –México, Colombia, Argentina y Chile–. Esta obra, y sin el afán de ser pretenciosa, evidencia un encuentro académico de personas con altas calidades académicas y profesionales, preocupadas por la protección del derecho a la alimentación en nuestros países. Sus visiones y reflexiones pueden ser un interesante punto de referencia para nuestros dirigentes, legisladores, diseñadores de políticas públicas, para el jurista y hasta para el ciudadano común.
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Esta publicação analisa a problemática situação da commedia dell'arte na historiografia do teatro, procurando estabelecer uma perspectiva informada e renovada sobre aspectos essenciais de uma história muitas vezes escondida sob o pesado fascínio das figuras convencionais da 'arte', em diálogo com contributos de Ferdinando Taviani (1986), Siro Ferrone (1993), Fischer-Lichte (1990) , entre outros autores.