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• W2138282645 abstract "Using two independent prostate cancer cell lines (LNCaP and MDA-PCa-2a), we demonstrate that coordinated stimulation of lipogenic gene expression by androgens is a common phenomenon in androgen-responsive prostate tumor lines and involves activation of the sterol regulatory element-binding protein (SREBP) pathway. We show 1) that in both cell lines, androgens stimulate the expression of fatty acid synthase and hydroxymethylglutaryl-coenzyme A synthase, two key lipogenic genes representative for the fatty acid and the cholesterol synthesis pathway, respectively; 2) that treatment with androgens results in increased nuclear levels of active SREBP; 3) that the effects of androgens on promoter-reporter constructs derived from both lipogenic genes (fatty acid synthase and hydroxymethylglutaryl-coenzyme A synthase) depend on the presence of intact SREBP-binding sites; and 4) that cotransfection with dominant-negative forms of SREBPs abolishes the effects of androgens. Related to the mechanism underlying androgen activation of the SREBP pathway, we show that in addition to minor effects on SREBP precursor levels, androgens induce a major increase in the expression of sterol regulatory element-binding protein cleavage-activating protein (SCAP), an escort protein that transports SREBPs from their site of synthesis in the endoplasmic reticulum to their site of proteolytical activation in the Golgi. Both time course studies and overexpression experiments showing that increasing levels of SCAP enhance the production of mature SREBP and stimulate lipogenic gene expression support the contention that SCAP plays a pivotal role in the lipogenic effects of androgens in tumor cells." @default.
• W2138282645 created "2016-06-24" @default.
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• W2138282645 date "2001-10-01" @default.
• W2138282645 modified "2023-09-27" @default.
• W2138282645 title "Androgens Stimulate Lipogenic Gene Expression in Prostate Cancer Cells by Activation of the Sterol Regulatory Element-Binding Protein Cleavage Activating Protein/Sterol Regulatory Element-Binding Protein Pathway" @default.
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• W2138282645 doi "https://doi.org/10.1210/mend.15.10.0703" @default.
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