ABSTRACT
Background: Perivascular adipose tissue (PVAT) plays an essential role in cardiovascular homeostasis. However, during obesity and diabetes, its role in vascular tone regulation is unclear. This study aimed to evaluate the function of the PVAT on aorta reactivity in the lean and cafeteria (CAF) diet-induced obese-hyperglycemic mice model. Methods: Aorta reactivity to phenylephrine, KCl, and acetylcholine was analyzed in lean (n = 6) and obese mice (n = 6). Also, nitric oxide (NO-) and cyclooxygenase participation, in the presence (n = 6) and absence (n = 6) of PVAT, were examined in the aortas. Results: After a CAF diet for 19 weeks, obese mice showed increased body weight, glucose intolerance, and hypercholesterolemia concerning lean mice. Vascular reactivity to phenylephrine was reduced significantly in the aorta of obese mice. In contrast, the contraction produced by KCl (80 mM) was increased in the aorta of obese mice independent of PVAT. Acetylcholine-induced vasorelaxation diminished in the aortas of obese mice in the presence of PVAT. Nonselective inhibition of cyclooxygenases likely shows that PVAT and endothelium release vasorelaxant prostanoids. Conclusions: The results suggest that PVAT modulates aorta reactivity by releasing NO-, decreasing the α1-adrenergic response to phenylephrine, and probably releasing vasorelaxant prostanoids. The data suggest that PVAT regulates the vascular smooth muscle and endothelial function in a CAF diet-induced obese-hyperglycemic mice model.
Subject(s)
Acetylcholine , Adipose Tissue , Mice , Animals , Mice, Obese , Acetylcholine/pharmacology , Obesity , Aorta , Vasodilator Agents , Phenylephrine/pharmacologyABSTRACT
Objetivos: Describir las características clínicas y los resultados del tratamiento inicial de los pacientes con linfoma de células del manto atendidos en el Instituto Nacional de Cancerología (INC) entre los años 2007 y 2011. Métodos: Estudio descriptivo y retrospectivo, tipo serie de casos basado en fuentes secundarias institucionales. Resultados: Se incluyeron 41 pacientes con una edad promedio de 60,5 años (DE ±10,5) y que tenían en su mayoría un estado funcional adecuado. La mayor parte tenía enfermedad avanzada al momento de la presentación (85%). El compromiso de la médula ósea y la afectación extranodal fueron frecuentes, encontrándose en 73% y 39% respectivamente. El diagnóstico histopatológico de la malignidad se realizó en tejido ganglionar en la mayoría de los casos (56%). Los esquemas de quimioterapia de primera línea empleados con más frecuencia fueron R-CHOP y R-HyperCVAD, en 37% y 29% de los casos respectivamente. Tras la quimioterapia de primera línea se logró alcanzar una respuesta completa en 64% de los pacientes, la mediana de duración de la primera remisión fue 9 meses (RIQ0,9 - 15). La neutropenia febril fue una complicación común presentándose en 42% de los casos. Dieciocho individuos recibieron quimioterapia de segunda línea, los esquemas más frecuentemente empleados fueron R-DHAP y R-HyperCVAD. Conclusiones: Las características clínicas de los pacientes son similares a las descritas en series de referencia. Las tasas de respuesta completa y la duración de la primera remisión son inferiores a las publicadas por otros grupos con esquemas similares de tratamiento. © 2014 Instituto Nacional de Cancerología.
Objective: To describe the clinical features and the treatment results achieved with the initial therapy among patients with mantle cell lymphoma treated at the National Cancer Institute (INC) between 2007 and 2011. Methods: Descriptive study, based on secondary institutional sources. Results: A total of 41 patients were included, with a mean age of 60.5 years (Standard deviation SD ± 10.5) and a good functional status. Most of them had advanced disease at initial presentation (85%). Bone marrow involvement and extra-nodal disease were frequent, as they were seen in 73% and 39% of the patients, respectively. Histopathological diagnosis of the malignancy was mainly made on lymph node tissue (56%). First line chemotherapy regimens used with an increased frequency were R CHOP and R- HyperCVAD, in 37% and 29% of the cases, respectively. After first line therapy, a complete response was achieved in 64% of the patients, median duration of the first remission was 9 months (Interquartile range IQR 0.9 - 15). Febrile neutropenia was a frequent complication, seen in 42% of the cases. Eighteen individuals received a second line of chemotherapy, with R DHAP and R HyperCVAD being the regimens most commonly administered. Conclusions: The clinical features of the patients are similar to those described in larger series of patients with the disease described elsewhere. The rate of complete responses, as well as the duration of the first remission after chemotherapy, is inferior when compared with the results of other groups that used similar treatment regimens.
