Pathophysiologic factors and perioperative therapeutic goals that affect reconstructive surgical procedures with flaps in patients with Diabetes Mellitus

La diabetes mellitus es considerada un factor de riesgo para complicaciones locales y fracaso quirúrgico en cirugías reconstructivas mediante el uso de colgajos debido a las alteraciones en el proceso de cicatrización propias de este patología. Objetivo:hacer una revisión de la literatura disponible sobre los factores fisiopatológicos que influyen en los resultados posquirúrgicos a corto, mediano y largo plazo en la población diabética, así como de las metas terapéuticas perioperatorias asociadas a mayores tasas de éxito. Metodología de Búsqueda: se realizó búsqueda en las bases de datos PUBMED, MEDLINE Y SCIELO, mediante el gestor de búsqueda utilizando los términos: “Period perioperative”, “Reconstructive surgical procedures”, “Surgical flaps”, “Diabetes mellitus”, obteniendo un total de 160 artículos de revistas en línea, de los cuales se seleccionaron 50. Resultados: la realización de colgajos en pacientes con diabetes mellitus se asocia a mayor riesgo de fracaso y complicaciones, las cuales disminuyen considerablemente si se realiza un estricto manejo perioperatorio enfocado en metas. Conclusiones: la diabetes mellitus causa alteraciones en la respuesta inflamatoria, disfunción microvascular y mayor estrés oxidativo, lo cual se ve reflejado en un proceso de cicatrizacion anormal, generando mayores tasas de infeccion y perdidas de colgajos; un estricto manejo peri operatorio guiado por metas logra disminuir las complicaciones y aumentar el exito quirurgico. MÉD.UIS. 2017;30(1):35-43.diabetes mellitus is considered a risk factor for local complications and surgical failure in reconstructive surgeries, mainly in flaps due to the fact that it causes alterations in the cicatrization process. Objective: to review the available literature on the pathophysiological factors that influence the short-, medium- and long-term results in the diabetic population, the perioperative therapeutic goals associated with higher success rates, and to establish a baseline protocol for the perioperative management of these patients. Searching methodology: we searched the PUBMED, MEDLINE and SCIELO databases using the search terms “Period perioperative”, “Reconstructive surgical procedures”, “Surgical flaps”, “Diabetes mellitus”, obtaining a total of 160 online journal articles, of which 50 were selected. Results: the performance of flaps in patients with diabetes mellitus is associated with an increased risk of failure and complications, which decrease considerably when a strict goal-directed perioperative management is performed. Conclusions: diabetes mellitus causes alterations in the inflammatory response, microvascular dysfunction and increases oxidative stress, which is reflected in an abnormal healing process, generating higher infection rates and graft loss, but if glycemic management goals are achieved, in the perioperative period it is possible to reduce the complications and to increase the surgical success. MÉD.UIS. 2017;30(1):35-43. Keywords: Diabetes Mellitus. Perioperative Period. Reconstructive Surgical Procedures. Surgical Flaps. Physiology Diabetes. Pathology Diabetes. Diabetes Complications

Flying ad-hoc network application scenarios and mobility models

[EN] Flying ad-hoc networks are becoming a promising solution for different application scenarios involving unmanned aerial vehicles, like urban surveillance or search and rescue missions. However, such networks present various and very specific communication issues. As a consequence, there are several research studies focused on analyzing their performance via simulation. Correctly modeling mobility is crucial in this context and although many mobility models are already available to reproduce the behavior of mobile nodes in an ad-hoc network, most of these models cannot be used to reliably simulate the motion of unmanned aerial vehicles. In this article, we list the existing mobility models and provide guidance to understand whether they could be actually adopted depending on the specific flying ad-hoc network application scenarios, while discussing their advantages and disadvantages.Bujari, A.; Tavares De Araujo Cesariny Calafate, CM.; Cano, J.; Manzoni, P.; Palazzi, CE.; Ronzani, D. (2017). Flying ad-hoc network application scenarios and mobility models. International Journal of Distributed Sensor Networks. 13(10):1-17. doi:10.1177/1550147717738192S117131

Factores fisiopatológicos y metas terapéuticas perioperatorias que influyen en procedimientos quirúrgicos reconstructivos mediante colgajos en pacientes con Diabetes Mellitus

diabetes mellitus is considered a risk factor for local complications and surgical failure in reconstructive surgeries, mainly in flaps due to the fact that it causes alterations in the cicatrization process. Objective: to review the available literature on the pathophysiological factors that influence the short-, medium- and long-term results in the diabetic population, the perioperative therapeutic goals associated with higher success rates, and to establish a baseline protocol for the perioperative management of these patients. Searching methodology: we searched the PUBMED, MEDLINE and SCIELO databases using the search terms “Period perioperative”, “Reconstructive surgical procedures”, “Surgical flaps”, “Diabetes mellitus”, obtaining a total of 160 online journal articles, of which 50 were selected. Results: the performance of flaps in patients with diabetes mellitus is associated with an increased risk of failure and complications, which decrease considerably when a strict goal-directed perioperative management is performed. Conclusions: diabetes mellitus causes alterations in the inflammatory response, microvascular dysfunction and increases oxidative stress, which is reflected in an abnormal healing process, generating higher infection rates and graft loss, but if glycemic management goals are achieved, in the perioperative period it is possible to reduce the complications and to increase the surgical success. MÉD.UIS. 2017;30(1):35-43.Keywords: Diabetes Mellitus. Perioperative Period. Reconstructive Surgical Procedures. Surgical Flaps. Physiology Diabetes. Pathology Diabetes. Diabetes Complications.La diabetes mellitus es considerada un factor de riesgo para complicaciones locales y fracaso quirúrgico en cirugías reconstructivas mediante el uso de colgajos debido a las alteraciones en el proceso de cicatrización propias de este patología. Objetivo:hacer una revisión de la literatura disponible sobre los factores fisiopatológicos que influyen en los resultados posquirúrgicos a corto, mediano y largo plazo en la población diabética, así como de las metas terapéuticas perioperatorias asociadas a mayores tasas de éxito. Metodología de Búsqueda: se realizó búsqueda en las bases de datos PUBMED, MEDLINE Y SCIELO, mediante el gestor de búsqueda utilizando los términos: “Period perioperative”, “Reconstructive surgical procedures”, “Surgical flaps”, “Diabetes mellitus”, obteniendo un total de 160 artículos de revistas en línea, de los cuales se seleccionaron 50. Resultados: la realización de colgajos en pacientes con diabetes mellitus se asocia a mayor riesgo de fracaso y complicaciones, las cuales disminuyen considerablemente si se realiza un estricto manejo perioperatorio enfocado en metas. Conclusiones: la diabetes mellitus causa alteraciones en la respuesta inflamatoria, disfunción microvascular y mayor estrés oxidativo, lo cual se ve reflejado en un proceso de cicatrizacion anormal, generando mayores tasas de infeccion y perdidas de colgajos; un estricto manejo peri operatorio guiado por metas logra disminuir las complicaciones y aumentar el exito quirurgico. MÉD.UIS. 2017;30(1):35-43

The unfolded protein response in the immune cell development : putting the caretaker in the driving seat

The endoplasmic reticulum (ER) is the primary site for the folding of proteins destined for the membranous compartment and the extracellular space. This elaborate function is coordinated by the unfolded protein response (UPR), a stress-activated cellular program that governs proteostasis. In multicellular organisms, cells have adopted specialized functions, which required functional adaptations of the ER and its UPR. Recently, it has become clear that in immune cells, the UPR has acquired functions that stretch far beyond its original scope. In this review, we will discuss the role of the UPR in the immune system and highlight the plasticity of this signaling cascade throughout immune cell development

Rationale, design, and baseline characteristics in Evaluation of LIXisenatide in Acute Coronary Syndrome, a long-term cardiovascular end point trial of lixisenatide versus placebo

BACKGROUND: Cardiovascular (CV) disease is the leading cause of morbidity and mortality in patients with type 2 diabetes mellitus (T2DM). Furthermore, patients with T2DM and acute coronary syndrome (ACS) have a particularly high risk of CV events. The glucagon-like peptide 1 receptor agonist, lixisenatide, improves glycemia, but its effects on CV events have not been thoroughly evaluated. METHODS: ELIXA (www.clinicaltrials.gov no. NCT01147250) is a randomized, double-blind, placebo-controlled, parallel-group, multicenter study of lixisenatide in patients with T2DM and a recent ACS event. The primary aim is to evaluate the effects of lixisenatide on CV morbidity and mortality in a population at high CV risk. The primary efficacy end point is a composite of time to CV death, nonfatal myocardial infarction, nonfatal stroke, or hospitalization for unstable angina. Data are systematically collected for safety outcomes, including hypoglycemia, pancreatitis, and malignancy. RESULTS: Enrollment began in July 2010 and ended in August 2013; 6,068 patients from 49 countries were randomized. Of these, 69% are men and 75% are white; at baseline, the mean ± SD age was 60.3 ± 9.7 years, body mass index was 30.2 ± 5.7 kg/m(2), and duration of T2DM was 9.3 ± 8.2 years. The qualifying ACS was a myocardial infarction in 83% and unstable angina in 17%. The study will continue until the positive adjudication of the protocol-specified number of primary CV events. CONCLUSION: ELIXA will be the first trial to report the safety and efficacy of a glucagon-like peptide 1 receptor agonist in people with T2DM and high CV event risk