A aplicação correcta da bioestatística como elemento-chave na investigação em nutrição clínica

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Role of TGF-β1 and MAP Kinases in the Antiproliferative Effect of Aspirin in Human Vascular Smooth Muscle Cells

We aimed to test the antiproliferative effect of acetylsalicylic acid (ASA) on vascular smooth muscle cells (VSMC) from bypass surgery patients and the role of transforming growth factor beta 1 (TGF-beta1).VSMC were isolated from remaining internal mammary artery from patients who underwent bypass surgery. Cell proliferation and DNA fragmentation were assessed by ELISA. Protein expression was assessed by Western blot. ASA inhibited BrdU incorporation at 2 mM. Anti-TGF-beta1 was able to reverse this effect. ASA (2 mM) induced TGF-beta1 secretion; however it was unable to induce Smad activation. ASA increased p38(MAPK) phosphorylation in a TGF-beta1-independent manner. Anti-CD105 (endoglin) was unable to reverse the antiproliferative effect of ASA. Pre-surgical serum levels of TGF-beta1 in patients who took at antiplatelet doses ASA were assessed by ELISA and remained unchanged.In vitro antiproliferative effects of aspirin (at antiinflammatory concentration) on human VSMC obtained from bypass patients are mediated by TGF-beta1 and p38(MAPK). Pre-surgical serum levels of TGF- beta1 from bypass patients who took aspirin at antiplatelet doses did not change

Decreased pre-surgical CD34+/CD144+ cell number in patients undergoing coronary artery bypass grafting compared to coronary artery disease-free valvular patients

<p>Abstract</p> <p>Background</p> <p>Cardiovascular disease has been linked to endothelial progenitor cell (EPC) depletion and functional impairment in atherosclerosis and aortic stenosis. EPCs may play a pivotal role in vascular grafting. However, the EPC depletion in coronary artery bypass grafting (CABG) patients has not been compared to coronary artery disease-free valvular replacement patients with aortic stenosis.</p> <p>Methods</p> <p>We aimed to assess the basal number of CD34⁺/KDR⁺and CD34⁺/CD144⁺cells in CABG patients, compared to aortic stenosis valvular replacement patients. 100 patients (51 CABG and 49 valvular surgery ones) were included in the present study. All CABG or valvular patients had angiographic demonstration of the presence or the absence of coronary artery disease, respectively. Numbers of CD34⁺/KDR⁺and CD34⁺/CD144⁺were assessed by flow cytometry of pre-surgical blood samples.</p> <p>Results</p> <p>We found a lower number of CD34⁺/CD144⁺cells in CABG patients compared to valvular patients (0.21 ± 0.03% vs. 0.47 ± 0.08%), and this difference remained statistically significant after the <it>P </it>was adjusted for multiple comparisons (<it>P </it>= 0.01428). Both groups had more EPCs than healthy controls.</p> <p>Conclusions</p> <p>Pre-surgical CD34⁺/CD144⁺numbers are decreased in CABG patients, compared to valvular patients with absence of coronary disease.</p

TALLER: PRÁCTICAS DE LABORATORIO SUSTENTABLES; UN DIÁLOGO DESDE EL CUIDADO DEL AMBIENTE Y LA ENSEÑANZA DE LA FÍSICA. UNA PROPUESTA DESDE LAS MÁQUINAS DE GOLDBERG

Este taller pretende mostrar la importancia de las máquinas de Goldberg como herramienta de dialogo entre las tensiones en la enseñanza de la Física y el problema generalizado de desperdicio de elementos reciclables en las diversas escuelas de básica y media. Que se devele una solución dialógica enmarcada en la creación de prácticas de laboratorio de física, accesible para los estudiantes, entendiendo la accesibilidad a las cuestiones prácticas y por supuesto cognitivas, asociadas a los montajes de laboratorio. Esta propuesta surge de la preocupación generalizada de los estudiantes del seminario de enseñanza de la física, del departamento de Física, apropósito de vislumbrar nuevas formas para la enseñanza de la física en la escuela, que trascienda lo tradicional y se posibiliten como punto de encuentro de las necesidades particulares de la comunidad educativa, para este caso, encontramos dos particularidades de preocupación colectiva, la primera, mostrar la física como una ciencia al alcance de todos y segundo decantar las consecuencias de generar una lógica del cuidado del entorno.Esta apuesta surge en el marco de las discusiones del seminario de enseñanza de la física (licenciatura en física) a propósito del papel que tiene la física en la escuela frente a su enseñabilidad

Self-tuning insulin adjustment algorithm for type 1 diabetic patients based on multi-doses regime

"A self-tuning algorithm is presented for on-line insulin dosage adjustment in type 1 diabetic patients (chronic stage). The algorithm suggested does not need information of the patient insulin–glucose dynamics (model-free). Three doses are programmed daily, where a combination of two types of insulin: rapid/short and intermediate/long acting is injected into the patient through a subcutaneous route. The doses adaptation is performed by reducing the error in the blood glucose level from euglycemics. In this way, a total of five doses are tuned per day: three rapid/short and two intermediate/long, where there is large penalty to avoid hypoglycemic scenarios. Closed-loop simulation results are illustrated using a detailed nonlinear model of the subcutaneous insulin–glucose dynamics in a type 1 diabetic patient with meal intake.