Lipotoxicidad en músculo esquelético y su relación con la resistencia insulínica. Estudios en un modelo experimental de síndrome metabólico
DOI:
https://doi.org/10.47196/diab.v53i2.151Palabras clave:
síndrome metabólico, dieta rica en sacarosa, músculo esquelético, resistencia insulínica, lipotoxicidadResumen
Introducción: el acúmulo de lípidos en el músculo esquelético se encuentra estrechamente vinculado con el desarrollo de la resistencia insulínica. Esta última cumple un rol patogénico central en el desarrollo de numerosos desórdenes metabólicos incluidos en el síndrome metabólico.
Objetivos: analizar algunas vías metabólicas implicadas en el acúmulo de lípidos en el músculo esquelético y su asociación con la resistencia insulínica en un modelo experimental que mimetiza el fenotipo del síndrome metabólico humano.
Materiales y métodos: ratas macho Wistar recibieron una dieta control (DC) o una dieta rica en sacarosa (DRS) durante seis meses. Al final del período experimental se analizó en músculo esquelético gastrocnemio: contenido de triglicéridos (TG), acil-CoA de cadena larga y diacilglicerol, actividad enzimática carnitina palmitoil transferasa muscular (M-CPT1, M-CPT2 y M-CPT total) y masa proteica del PPARα, AMPK y AMPKp. Se determinaron los niveles séricos de TG, AGNE, glucosa, insulina, TNFα y adiponectina. La sensibilidad insulínica se midió por la técnica clamp euglucémica-hiperinsulinémica.
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Esta obra está bajo una licencia internacional Creative Commons Atribución-NoComercial-SinDerivadas 4.0.
Dirección Nacional de Derecho de Autor, Exp. N° 5.333.129. Instituto Nacional de la Propiedad Industrial, Marca «Revista de la Sociedad Argentina de Diabetes - Asociación Civil» N° de concesión 2.605.405 y N° de disposición 1.404/13.
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