5 research outputs found

    LIPOCALIN 2 PROMOTES THE ESTABLISHMENT OF A PRO-TUMORIGENIC MICROENVIRONMENT IN PANCREATIC CANCER

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    Pancreatic ductal adenocarcinoma (PDAC) is a disease characterized by a dismal prognosis with a 5-year survival rate of 7%. A unique hallmark of this disease is an abundant desmoplastic reaction that can account for up to 90% of the solid tumor volume. Key components of the PDAC stroma include the extracellular matrix (ECM) rich in collagen type I and III, activated pancreatic stellate cells (PSCs) and inflammatory cells such as neutrophils and macrophages. The main line of evidence has suggested a pro-tumorigenic role for the PDAC stroma as it has been shown to help enhance tumor growth, invasive potential and drug resistance. Recent reports however, have challenged these findings and shown that the stroma offered protection from tumor growth. Given the extensive presence of stroma and its presumed roles in PDAC, characterization of the function of molecules that can alter stromal composition is warranted. LCN2 is a molecule that has been confirmed to be differentially expressed in PDAC. Attempts to investigate its biological function in PDAC have unfortunately led to conflicting results. In this study, we examined the effect of LCN2 depletion on tumor growth in a syngeneic orthotopic model of PDAC. We report that LCN2 depletion delayed tumor growth, decreased changes in stromal composition, and diminished inflammatory cell infiltration leading to increased survival. In addition, we examined the role of LCN2 and its specific receptor SLC22A17 in human PSCs. We revealed for the first time that hPSCs don鈥檛 produce LCN2, but do express LCN2 receptors. Moreover, ectopic LCN2 promoted hPSCs to produce inflammatory factors in a receptor-mediated manner. Finally, because LCN2 is involved in iron transport, we showed that LCN2鈥檚 effects on hPSCs were also mediated by changes in iron levels. Overall, our results suggest a model for LCN2 function in the regulation of the tumor microenvironment and shown its ability to promote tumor growth in PDAC

    calidad de atenci贸n, manejo y cuidado de enfermer铆a a mujeres embarazadas con problemas de nutrici贸n atendidos en el puesto de salud Quebrada Honda, Matagalpa durante el II semestre del a帽o 2011

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    El estado nutricional de la mujer en 茅poca de concepci贸n y calidad de dieta que consume durante los meses siguientes contribuyen a determinar su salud y bienestar, as铆 como la del feto, una alimentaci贸n balanceada durante el embarazo tal vez no corrija todos los problemas nutricionales pero si constituye un paso muy grande en ese sentido. La presente investigaci贸n se realizo con el prop贸sito de evaluar la calidad de atenci贸n, manejo y cuidado de enfermer铆a a mujeres embarazadas con problemas de nutrici贸n atendidas en el puesto de salud Quebrada Honda durante el segundo semestre del a帽o 2011. El tipo de estudio es descriptivo con enfoque cuantitativo cuya recolecci贸n de datos se obtuvo atraves de encuesta , expediente cl铆nicos , enfermeras , gestantes y bibliograf铆a , nuestro universo fue 96 embarazadas de donde se tomo una muestra por conveniencia de 38 gestantes con problemas de nutrici贸n .El embarazo esta frecuentemente asociado con una disminuci贸n, de las reservas corporales de algunos nutrientes, especialmente mujeres de bajo nivel socioecon贸mico, mult铆paras y de bajo consumo diet茅tico lo que puede conducir a deficiencias especificas de nutrientes .Los factores socio demogr谩fico son los que m谩s influyen en el manejo de enfermer铆a a mujeres embarazadas con problema de nutrici贸n que asisten en el puesto de salud de Quebrada Honda , siendo las principales alteraciones nutricionales la obesidad y la desnutrici贸n materna hay que tener en cuenta que la consejer铆a sobre una dieta y alimentaci贸n adecuada durante la gestaci贸n es primordial para ayudar a prevenir los problemas de nutrici贸
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