ABSTRACT
RESUMEN Objetivo: Describir las características demográficas, temporales y espaciales de las personas con lesiones de causa externa (LCE) y la relación con el consumo y la disponibilidad de alcohol, ocurridos en el distrito y atendidos en un hospital de emergencias. Material y métodos: Estudio descriptivo retrospectivo de personas atendidas por LCE en el Hospital de Emergencias José Casimiro Ulloa en el periodo 2014-2016 y la información de la denuncia policial por los afectados, en la comisaría del distrito. Se determinó la asociación entre las variables demográficas, temporales y espaciales con el tipo de LCE y la presencia de alcohol mediante pruebas de regresión logística. Resultados : Se encontró que era más probable la presencia de alcohol en un accidentado con LCE, cuando este era del sexo masculino en los días jueves a domingo. La contusión en una LCE en vez de una herida cortante, fue más probable cuando el accidentado era de sexo masculino, edades entre 15 a 38 años, la causa era una agresión, la ocurrencia del evento se producía entre las 00:00 a 18:00 horas, los días jueves a domingo y en los años 2014 y 2016. Geográficamente, la ocurrencia fue mayor en avenidas principales a no más de 500 metros de lugares donde se vendía y consumía licor. Conclusiones : La persona que va atenderse por lesiones de causa externa causadas como consecuencia de la violencia tiene una alta probabilidad de ser varón, además ocurren con mayor frecuencia los fines de semana y en avenidas principales en donde se puede usar un transporte público y no a más de 500 metros de lugares en donde se puede vender y consumir alcohol sin necesidad de ser residentes del distrito de ocurrencia, sin descartar que el consumo de alcohol pueda considerarse un factor de riesgo.
SUMMARY Objective: To describe demographic, temporal and spatial relationships of external lesions (EL) with alcohol consumption in patients attending an emergency hospital in Lima. Methods: Retrospective study of patients with EL attended at Hospital de Emergencias Casimiro Ulloa from 2014-2016 including information on police investigation. Logistic regression analysis was carried-out to evaluate association between type of EL and alcohol consumption. Results: The relationship of alcohol consumption and EL was stronger in males and from Thursday to Sunday. Contusions instead of stab wounds were more likely when the victim was male from 15-38 years of age and when had occurred from 00:00 to 18:00 from Thursdays to Sundays. EL occurred more frequently near main avenues at no more than 500 meters from alcoholic beverages were sold. Conclusions: Victims of EL are more likely to be males not necessarily living in the district where the aggression occurred, which tended to happen near main avenues close to where alcoholic beverages are offered. Alcohol consumption could not be ruled-out as a risk factors for EL.
ABSTRACT
Hypoxia is a hallmark of solid tumors, including breast cancer, and the extent of tumor hypoxia is associated with treatment resistance and poor prognosis. Considering the limited treatment of hypoxic tumor cells and hence a poor prognosis of breast cancer, the investigation of natural products as potential chemopreventive anti-angiogenic agents is of paramount interest. Rhein (4,5-dihydroxyanthraquinone-2-carboxylic acid), the primary anthraquinone in the roots of Cassia alata L., is a naturally occurring quinone which exhibits a variety of biologic activities including anti-cancer activity. However, the effect of rhein on endothelial or cancer cells under hypoxic conditions has never been delineated. Therefore, the aim of this study was to investigate whether rhein inhibits angiogenesis and the viability of hormone-dependent (MCF-7) or -independent (MDA-MB-435s) breast cancer cells in vitro under normoxic or hypoxic conditions. Rhein inhibited vascular endothelial growth factor (VEGF(165))-stimulated human umbilical vein endothelial cell (HUVEC) tube formation, proliferation and migration under normoxic and hypoxic conditions. In addition, rhein inhibited in vitro angiogenesis by suppressing the activation of phosphatidylinositol 3-kinase (PI3K), phosphorylated-AKT (p-AKT) and phosphorylated extracellular signal-regulated kinase (p-ERK) but showed no inhibitory effects on total AKT or ERK. Rhein dose-dependently inhibited the viability of MCF-7 and MDA-MB-435s breast cancer cells under normoxic or hypoxic conditions, and inhibited cell cycle in both cell lines. Furthermore, Western blotting demonstrated that rhein inhibited heat shock protein 90alpha (Hsp90α) activity to induce degradation of Hsp90 client proteins including nuclear factor-kappa B (NF-κB), COX-2, and HER-2. Rhein also inhibited the expression of hypoxia-inducible factor-1 alpha (HIF-1α), vascular endothelial growth factor (VEGF(165)), epidermal growth factor (EGF), and the phosphorylation of inhibitor of NF-κB (I-κB) under normoxic or hypoxic conditions. Taken together, these data indicate that rhein is a promising anti-angiogenic compound for breast cancer cell viability and growth. Therefore, further studies including in vivo and pre-clinical need to be performed.
