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The purpose of this study was to provide evidence that dietary CLA can prevent the pathogenesis of metabolic syndrome in tissue structure, suggesting potential benefits in the onset of this syndrome. Wistar male spontaneous hypertensive rats (SHR), were classified into two groups that were fed a standard diet for eight weeks: one with 7.5% sunflower oil (V-SHR group), and the other with 6% sunflower oil and 1.5% CLA (CLA-SHR group). A control healthy group consisted of Kyoto-Wistar male rats fed the standard diet with 7.5% sunflower oil. The animals were sacrificed, and sections of liver, kidneys and aorta were fixed in 10% formaldehyde, and then stained with Hematoxylin and Eosin. Only in the V-SHR group, the stain of the aorta indicated irregular endothelial morphology; liver parenchyma was characterized by an infiltration of inflammatory neutrophils, fibrosis, thickening of the portal vein epithelium, hepatocyte hyperplasia and steatosis. The renal tissue of this group evidenced hyperplasia in the cells of the endothelial of Bowman´s capsule. Abnormal histological changes were not observed in either the control group or the rats fed with CLA, suggesting a protective role of CLA in the onset of metabolic syndrome.<br><br>El objetivo del presente estudio fue proporcionar evidencia que el CLA dietario puede evitar la patogénesis del síndrome metabólico en la estructura tisular, lo que sugiere beneficios potenciales en el desarrollo de este síndrome. Dos grupos de ratas Wistar macho espontáneamente hipertensas (SHR) fueron alimentadas con una dieta normal por 8 semanas: una dieta contenía 7.5% de aceite de girasol (grupo VSHR), y el otro contenía 6% de aceite de girasol y 1.5% de CLA (grupo CLA-SHR). A un grupo testigo sano de ratas macho Kyoto-Wistar les fue proporcionada una dieta normal con 7.5% de aceite de girasol. Los animales fueron sacrificados y se tomaron secciones de hígado, riñones y aorta, las cuales fueron fijadas en formaldehído al 10% y teñidas con Hematoxilina y Eosina. Las tinciones de aorta mostraron morfología irregular del endotelio en la aorta solo en el grupo V-SHR; el parénquima hepático se caracterizó por infiltración de neutrófilos inflamatorios, fibrosis y engrosamiento del epitelio de la vena porta, hiperplasia hepática y esteatosis. El tejido renal de este mismo grupo evidenció hiperplasia en las células del endotelio de la cápsula de Bowman. No se observaron cambios anormales histológicos tanto en el grupo testigo como en el alimentado con CLA, lo que sugiere un papel protector del CLA en el desarrollo del síndrome metabólico

A CLA enriched diet improves organ damage associated with the metabolic syndrome in spontaneous hypertensive rats