Broccoli Sprouts Impact on Cholesterol Metabolism and Genes Involved in Lipid Homeostasis
Broccoli ( Brassica oleracea var. italica) sprouts and extracts rich in glucosinolates and isothiocyanates affect cholesterol metabolism and genes involved in lipid homeostasis in hamsters.
Rodríguez-Cantú LN, Gutiérrez-Uribe JA, Arriola-Vucovich J, Díaz-De La Garza RI, Fahey JW, Serna-Saldivar SO.
J Agric Food Chem. 2011 Feb 23;59(4):1095-103. Epub 2011 Jan 21.
Departamento de Biotecnología e Ingeniería de Alimentos, Tecnológico de Monterrey, Avenida Eugenio Garza Sada 2501 Sur, CP 64849, Monterrey, NL, Mexico.
This study investigated the effects of broccoli sprouts (BS) on sterol and lipid homeostasis in Syrian hamsters with dietary-induced hypercholesterolemia. Treatments included freeze-dried BS containing 2 or 20 μmol of glucoraphanine (BSX, BS10X), glucoraphanine-rich BS extract (GRE), sulforaphane-rich BS extract (SFE), and simvastatin. Each experimental diet was offered to eight animals (male and female) for 7 weeks. Hepatic cholesterol was reduced by BS10X and SFE treatments in all animals. This correlated with a down-regulation of gene expression of sterol regulatory element-binding proteins (SREBP-1 and -2) and fatty acid synthase (FAS) caused by GRE and SFE diets. BS10X caused changes in gene expression in a gender-specific manner; additionally, it increased coprostanol excretion in females. With the same concentration of glucoraphanin, consumption of broccoli sprouts (BS10X) had more marked effects on cholesterol homeostasis than GRE; this finding reinforces the importance of the matrix effects on the bioactivity of functional ingredients.