237 research outputs found

    Nitrosative and Oxidative Stresses Contribute to Post-Ischemic Liver Injury Following Severe Hemorrhagic Shock: The Role of Hypoxemic Resuscitation

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    Purpose: Hemorrhagic shock and resuscitation is frequently associated with liver ischemia-reperfusion injury. The aim of the study was to investigate whether hypoxemic resuscitation attenuates liver injury. Methods: Anesthetized, mechanically ventilated New Zealand white rabbits were exsanguinated to a mean arterial pressure of 30 mmHg for 60 minutes. Resuscitation under normoxemia (Normox-Res group, n = 16, PaO2 = 95–105 mmHg) or hypoxemia (Hypox-Res group, n = 15, PaO 2 = 35–40 mmHg) followed, modifying the FiO 2. Animals not subjected to shock constituted the sham group (n = 11, PaO 2 = 95–105 mmHg). Indices of the inflammatory, oxidative and nitrosative response were measured and histopathological and immunohistochemical studies of the liver were performed. Results: Normox-Res group animals exhibited increased serum alanine aminotransferase, tumor necrosis factor- alpha, interleukin (IL)-1b and IL-6 levels compared with Hypox-Res and sham groups. Reactive oxygen species generation, malondialdehyde formation and myeloperoxidase activity were all elevated in Normox-Res rabbits compared with Hypox-Res and sham groups. Similarly, endothelial NO synthase and inducible NO synthase mRNA expression was up-regulated and nitrotyrosine immunostaining increased in animals resuscitated normoxemically, indicating a more intense nitrosative stress. Hypox-Res animals demonstrated a less prominent histopathologic injury which was similar to sham animals. Conclusions: Hypoxemic resuscitation prevents liver reperfusion injury through attenuation of the inflammatory respons

    Derrida's 'The Purveyor of Truth' and constitutional reading

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    In this article the author explores Jacques Derrida’s reading in ‘The Purveyor of Truth’ of Edgar Allan Poe’s ‘The Purloined Letter’. In his essay, Derrida proposes a reading which differs markedly from the interpretation proposed by Lacan in his Seminar on ‘The Purloined Letter’. To appreciate Derrida’s reading, which is not hermeneutic-semantic in nature like that of Lacan, it is necessary to look at the relation of Derrida’s essay to his other texts on psychoanalysis, more specifically insofar as the Freudian death drive is concerned. The present article explores this ‘notion’ as elaborated on by Freud in Beyond the Pleasure Principle as well as Derrida’s reading of this text. It also investigates the importance of the ‘notion’ of the death drive as well as the significance of Derrida’s reading of The Purloined Letter for constitutional interpretation

    Gastrointestinal stromal tumor

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    <p>Abstract</p> <p>Background</p> <p>GISTs are a subset of mesenchymal tumors and represent the most common mesenchymal neoplasms of GI tract. However, GIST is a recently recognized tumor entity and the literature on these stromal tumors has rapidly expanded.</p> <p>Methods</p> <p>An extensive review of the literature was carried out in both online medical journals and through Athens University Medical library. An extensive literature search for papers published up to 2009 was performed, using as key words, GIST, Cajal's cells, treatment, Imatinib, KIT, review of each study were conducted, and data were abstracted.</p> <p>Results</p> <p>GIST has recently been suggested that is originated from the multipotential mesenchymal stem cells. It is estimated that the incidence of GIST is approximately 10-20 per million people, per year.</p> <p>Conclusion</p> <p>The clinical presentation of GIST is variable but the most usual symptoms include the presence of a mass or bleeding. Surgical resection of the local disease is the mainstay therapy. However, therapeutic agents, such as Imatinib have now been approved for the treatment of advanced GISTs and others, such as everolimus, rapamycin, heat shock protein 90 and IGF are in trial stage demonstrate promising results for the management of GISTs.</p

    Disabling XAuthors, Disordering TextsX: Deconstructing Disability and Identity in ChangingX Times

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    Drawing on Badiou’s writing, we develop new insights on some central notions of the discourse on “disability.” We offer eight agonistic, intersecting trajectories addressing these concepts. Drawing on authorial voices, we criticize the grammatical and rhetorical maneuvers we have previously undertaken as we represent ourselves aiming for forms of participatory engagement, thus offering both critique and self-critique. Previous poststructuralist accounts in this area have drawn on “philosophers of difference,” but mainly Deleuze and Guattari. This piece offers innovation in harnessing aspects of Badiou’s thinking to issues surrounding “discourses of disability” and notions of the research “self” in its various “impersonations.
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