SREBP-1c in nonalcoholic fatty liver disease induced by Western-type high-fat diet plus fructose in rats

M Aragno, CE Tomasinelli, I Vercellinatto… - Free radical biology and …, 2009 - Elsevier
M Aragno, CE Tomasinelli, I Vercellinatto, MG Catalano, M Collino, R Fantozzi, O Danni…
Free radical biology and Medicine, 2009Elsevier
This study concentrated on the initial events triggering the development of nonalcoholic fatty
liver disease induced by a high-fat plus fructose (HF-F) diet and on the possibility of delaying
nonalcoholic fatty liver disease progression by adding dehydroepiandrosterone (DHEA) to
the diet. Sterol regulatory element binding protein-1c (SREBP-1c) activation plays a crucial
role in the progression of nonalcoholic fatty liver disease induced by an HF-F diet. This study
investigated the protective effects of DHEA, a compound of physiological origin with …
This study concentrated on the initial events triggering the development of nonalcoholic fatty liver disease induced by a high-fat plus fructose (HF-F) diet and on the possibility of delaying nonalcoholic fatty liver disease progression by adding dehydroepiandrosterone (DHEA) to the diet. Sterol regulatory element binding protein-1c (SREBP-1c) activation plays a crucial role in the progression of nonalcoholic fatty liver disease induced by an HF-F diet. This study investigated the protective effects of DHEA, a compound of physiological origin with multitargeted antioxidant properties, against the induction of SREBP-1c and on liver insulin resistance in rats fed an HF-F diet, which mimics a typical unhealthy Western diet. An HF-F diet, fortified or not with DHEA (0.01%, w/w), was administered for 15 weeks to male Wistar rats. After HF-F the liver showed unbalanced oxidative status, fatty infiltration, hepatic insulin resistance, and inflammation. The addition of DHEA to the diet reduced both activation of oxidative-stress-dependent pathways and expression of SREBP-1c and partially restored the expression of liver X-activated receptor-α and insulin receptor substrate-2 genes. DHEA supplementation of the HF-F diet reduced de novo lipogenesis and delayed progression of nonalcoholic fatty liver disease, demonstrating a relationship between oxidative stress and nonalcoholic fatty liver disease via SREBP-1c.
Elsevier