23 research outputs found

    Análisis de biomarcadores lipídicos presentes en hígado de salmón en presencia de agentes infecciosos : Comparación de perfiles mediante la técnica de MALDI-TOF-MS

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    48 p.El aumento en el consumo de los salmones por sus atributos y cualidades en la dieta ha generado la industria de la salmonicultura, para su desarrollo a gran escala. Con el tiempo se han producidos problemas de las cuales la principal dificultad son las enfermedades, las más importantes destacan: piscirrickettsiosis, Caligidosis y necrosis pancreática infecciosa, las cuales en la mayoría de los casos causan su muerte, lo cual genera pérdidas económicas a la industria Salmonera. Por ello analizar muestras de tejido de salmón mediante la técnica de MALDI-TOF-MS para comparar perfiles lipídicos de salmón del Atlántico (Salmo salar), incluyendo peces sanos y peces infectados con diferentes agentes patógenos, son necesarias para atenuar este problema. Las muestras fueron obtenidas a partir de un bioensayo controlado en el que peces fueron enfrentados a P. salmonis, Caligus e IPNV. Se utilizó un protocolo de extracción basado en la técnica de Folch con algunas modificaciones. El estudio de los biomarcadores lipídicos presentes en muestras de tejido de salmón se realizó mediante MALDI-TOF-MS. Se utilizó el software SPSS 15.0 para realizar un Análisis de componentes principales con objetivo de reducir el número de variables. Se establecieron diferencias en el metabolismo lipídicos del salmón del Atlántico a nivel hepático cuando los peces padecen de enfermedades como la piscirickettsiosis, la necrosis pancreática infecciosa y la caligidosis. Las alteraciones en el metabolismo lipídicos de los peces parece ser inespecífica e independiente del tipo de agente patógeno. Desconoce, la identidad de cada uno de los lípidos involucrados, por lo que realizar algunos ensayos complementarios (ESI-MS, GC-MS, etc.) que permitan identificar de manera inequívoca cada uno de los lípidos encontrados en estos perfiles y establecerlos como posibles biomarcadores para salmones sanos y/o enfermos

    A Universal Approach to Eliminate Antigenic Properties of Alpha-Gliadin Peptides in Celiac Disease

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    Celiac disease is caused by an uncontrolled immune response to gluten, a heterogeneous mixture of wheat storage proteins, including the α-gliadins. It has been shown that α-gliadins harbor several major epitopes involved in the disease pathogenesis. A major step towards elimination of gluten toxicity for celiac disease patients would thus be the elimination of such epitopes from α-gliadins. We have analyzed over 3,000 expressed α-gliadin sequences from 11 bread wheat cultivars to determine whether they encode for peptides potentially involved in celiac disease. All identified epitope variants were synthesized as peptides and tested for binding to the disease-associated HLA-DQ2 and HLA-DQ8 molecules and for recognition by patient-derived α-gliadin specific T cell clones. Several specific naturally occurring amino acid substitutions were identified for each of the α-gliadin derived peptides involved in celiac disease that eliminate the antigenic properties of the epitope variants. Finally, we provide proof of principle at the peptide level that through the systematic introduction of such naturally occurring variations α-gliadins genes can be generated that no longer encode antigenic peptides. This forms a crucial step in the development of strategies to modify gluten genes in wheat so that it becomes safe for celiac disease patients. It also provides the information to design and introduce safe gluten genes in other cereals, which would exhibit improved quality while remaining safe for consumption by celiac disease patients

    A View from the Past Into our Collective Future: The Oncofertility Consortium Vision Statement

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    Today, male and female adult and pediatric cancer patients, individuals transitioning between gender identities, and other individuals facing health extending but fertility limiting treatments can look forward to a fertile future. This is, in part, due to the work of members associated with the Oncofertility Consortium. The Oncofertility Consortium is an international, interdisciplinary initiative originally designed to explore the urgent unmet need associated with the reproductive future of cancer survivors. As the strategies for fertility management were invented, developed or applied, the individuals for who the program offered hope, similarly expanded. As a community of practice, Consortium participants share information in an open and rapid manner to addresses the complex health care and quality-of-life issues of cancer, transgender and other patients. To ensure that the organization remains contemporary to the needs of the community, the field designed a fully inclusive mechanism for strategic planning and here present the findings of this process. This interprofessional network of medical specialists, scientists, and scholars in the law, medical ethics, religious studies and other disciplines associated with human interventions, explore the relationships between health, disease, survivorship, treatment, gender and reproductive longevity. The goals are to continually integrate the best science in the service of the needs of patients and build a community of care that is ready for the challenges of the field in the future

    Satellite Data to Improve the Knowledge of Geohazards in World Heritage Sites

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    According to the United Nations Educational, Scientific and Cultural Organization (UNESCO) agency, the World Heritage Sites (WHS) inscribed in the World Heritage List (WHL) must be safeguarded with an adequate protection system, in order to guarantee their integrity and authenticity. Currently, many UNESCO sites are threatened by geohazards, but the safeguard of these sites does not seem to be wide-ranging. Looking at the standard list of factors affecting the Outstanding Universal Value (OUV) of WHS, which has been adopted by the World Heritage Committee in 2008, it seems that only “sudden geological events” are considered as factors that undermine the protection of the properties. Furthermore, it is well known that slow-kinematic phenomena can also threaten cultural and natural heritage. This study proposes a satellite InSAR-based procedure to identify and monitor the temporal and spatial evolution of ground deformation related to slow-kinematic geohazards (slow-moving landslides and ground-subsidence). This procedure, applied in this work on the Tuscany Region (Italy), simplify the InSAR products interpretation, making them easily exploitable by the local WHS managers for long-term geohazards monitoring and conservation strategies. These activities, thanks to the main characteristics of the recent Sentinel-1 data (short revisit time, free availability without any restrictions and worldwide coverage), can be defined for each UNESCO site of the world

    Informe final del proyecto: La gestión institucional de un currículo híbrido. Estudio de casos en educación media en Uruguay

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    El presente trabajo recoge los resultados de la investigación en la que buscamos indagar cuáles fueron las decisiones de gestión de la modalidad híbrida en el período 2020-2021, especialmente en el momento de regreso a las instituciones luego del cierre de las mismas. A los fines del presente trabajo tomamos por "híbrida" una modalidad educativa que articula instancias presenciales y a distancia y tiempos sincrónicos y asincrónicos dentro de una misma propuesta. Encontramos que la gestión se centró en siete grandes ejes: las estrategias de comunicación, la selección de herramientas para la enseñanza, la reorganización de la rutina escolar, la puesta a disposición de la comunidad de equipamiento y conectividad, la capacitación docente, el diseño de estrategias de seguimiento de los y las estudiantes, las orientaciones acerca de la reorganización de los contendios disciplinares.Agencia Nacional de Investigación e Innovació
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