SREBPs: the crossroads of physiological and pathological lipid homeostasis - PubMed (original) (raw)
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SREBPs: the crossroads of physiological and pathological lipid homeostasis
Rajendra Raghow et al. Trends Endocrinol Metab. 2008 Mar.
Abstract
The uptake, biosynthesis and metabolism of cholesterol and other lipids are exquisitely regulated by feedback and feed-forward pathways in organisms ranging from Caenorhabditis elegans to humans. As endoplasmic reticulum (ER) membrane-embedded transcription factors that are activated in the Golgi apparatus, sterol regulatory element-binding proteins (SREBPs) are central to the intracellular surveillance of lipid catabolism and de novo biogenesis. The biosynthesis of SREBP proteins, their migration from the ER to the Golgi compartment, intra-membrane proteolysis, nuclear translocation and trans-activation potential are tightly controlled in vivo. Here we summarize recent studies elucidating the transcriptional and post-transcriptional regulation of SREBP-1c through nutrition and the action of hormones, particularly insulin, and the resulting implications for dyslipidemia of obesity, metabolic syndrome and type 2 diabetes.
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