2009, Número 2
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Bioquimia 2009; 34 (2)
La tormenta perfecta: obesidad, disfunción del adipocito y consecuencias metabólicas
Ferranti S, Mozaffarian D, Sánchez RMA
Idioma: Español
Referencias bibliográficas: 95
Paginas: 95-108
Archivo PDF: 143.61 Kb.
RESUMEN
Antecedentes: La apreciación de la cercanía entre la obesidad y la enfermedad se ha incrementado dada la elevación de la prevalencia de obesidad en países desarrollados y en vías de desarrollo. La fuerte relación entre el exceso de tejido adiposo y pobres resultados en la salud, incluyendo enfermedad cardiovascular, diabetes y cáncer, demandan la elucidación de la fisiopatología celular compleja, hormonal y molecular según la cual la adiposidad inicia y mantiene los efectos adversos a la salud.
Contenido: En este reporte revisamos el metabolismo del adipocito y su función en el contexto del desequilibrio energético y el exceso de nutrientes postprandiales, incluyendo la hipertrofia e hiperplasia del adipocito, la disfunción del adipocito y otras consecuencias sistémicas. Discutimos también las implicaciones para la evaluación del laboratorio y el cuidado clínico, incluyendo el papel de las modificaciones del estilo de vida. El desequilibrio energético crónico produce hipertrofia e hiperplasia del adipocito, estrés del retículo endoplásmico y disfunción mitocondrial. Este proceso deja una liberación intracelular y sistémica incrementada de adipocinas, ácidos grasos libres y mediadores inflamatorios que causan disfunción del adipocito e inducen efectos adversos en las células hepáticas, pancreáticas y del músculo esquelético, además de los lechos cardiaco y vascular. Varias pruebas especializadas de laboratorio pueden cuantificar estos procesos y predecir un riesgo clínico, pero la traducción a la clínica es prematura. Intervenciones farmacológicas actuales y a futuro pueden tener como blanco estas vías; probablemente modestos cambios en la dieta, actividad física, peso y tabaquismo tienen
gran impacto.
Resumen: El estrés del retículo endoplásmico y mitocondrial del adipocito, y los cambios asociados en la circulación de adipocinas, ácidos grasos libres y mediadores inflamatorios son el centro de los efectos adversos a la salud de la adiposidad. Investigaciones futuras pueden enfocarse en estas vías y en revertir los comportamientos adversos del estilo de vida que son la causa fundamental de la adiposidad.
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