116 research outputs found

    Application of Rotating Wall Vessel (RWV) Cell Culture for Pancreas Islet Cell Transplantation

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    Type I insulin-dependent diabetes mellitus (IDDM) remains a major cause of morbidity and mortality in both pediatric and adult populations, despite significant advances in medical management. While insulin therapy treats symptoms of acute diabetes, it fails to prevent chronic complications such as microvascular disease, blindness, neuropathy, and chronic renal failure. Strict control of blood glucose concentrations delays but does not prevent the onset and progression of secondary complications. Although, whole pancreas transplantation restores physiological blood glucose levels, a continuous process of allograft rejection causes vascular and exocrine-related complications. Recent advances in methods for isolation and purification of pancreatic islets make transplantation of islet allografts an attractive alternative to whole pancreas transplantation. However, immunosuppressive drugs are necessary to prevent rejection of islet allografts and many of these drugs are known to be toxic to the islets. Since auto-transplants of isolated islets following total pancreatectomy survive and function in vivo, it is apparent that a major obstacle to successful clinical islet transplantation is the immunogenicity of the islet allografts

    Bioreactor technologies to support liver function in vitro

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    Liver is a central nexus integrating metabolic and immunologic homeostasis in the human body, and the direct or indirect target of most molecular therapeutics. A wide spectrum of therapeutic and technological needs drives efforts to capture liver physiology and pathophysiology in vitro, ranging from prediction of metabolism and toxicity of small molecule drugs, to understanding off-target effects of proteins, nucleic acid therapies, and targeted therapeutics, to serving as disease models for drug development. Here we provide perspective on the evolving landscape of bioreactor-based models to meet old and new challenges in drug discovery and development, emphasizing design challenges in maintaining long-term liver-specific function and how emerging technologies in biomaterials and microdevices are providing new experimental models.National Institutes of Health (U.S.) (R01 EB010246)National Institutes of Health (U.S.) (P50-GM068762-08)National Institutes of Health (U.S.) (R01-ES015241)National Institutes of Health (U.S.) (P30-ES002109)5UH2TR000496-02National Science Foundation (U.S.). Emergent Behaviors of Integrated Cellular Systems (CBET-0939511)United States. Defense Advanced Research Projects Agency. Microphysiological Systems Program (W911NF-12-2-0039

    Pediatric Transfusion Therapy

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    Teoría y construccion de los cañones rayados

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    Las h. de grab. pleg. son litog

    Teoria y construcción de los cañones rayados

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    Contiene: parte segunda y tercera (141, [4] p., V-VII h. de lam. pleg.

    Teoría y construccion de los cañones rayados

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    El pie de imp del t. II : Madrid: imprenta y librería de Eusebio AguadoT.I: 205, [1] p., [4] h. de grab. pleg.; T.II: 141, [3] p., V-VIII h. de grab. plegLas h. de lám. pleg.: "Etablt. et imprie. de Noblet et Baudry

    Teoría y práctica de la construcción de proyectiles y espoletas

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    Las h. de lám.: "F. Gosset gº"T. I. Primera parte - t. II. Segunda y tercera part

    The Hexa-Dodeca-Flexagon

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