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      • Bioactive Compound Screen for Pharmacological Enhancers of Apolipoprotein E in Primary Human Astrocytes

        Finan, G.M.,Realubit, R.,Chung, S.,Lutjohann, D.,Wang, N.,Cirrito, J.R.,Karan, C.,Kim, T.W. Elsevier 2016 Cell chemical biology Vol.23 No.12

        <P>Pharmacological screening in physiologically relevant brain cells is crucial for identifying neuroactive compounds that better translate into in vivo biology and efficacious therapeutics. Pharmacological enhancement of apolipoprotein E (apoE), a cholesterol-transporting apolipoprotein, has been proposed as a promising therapeutic approach for Alzheimer's disease. Several nuclear receptor agonists were initially shown to increase brain apoE levels together with ATP-binding cassette transporter 1 (ABCA1), but their underlying mechanisms remain unclear. To gain an insight on brain apoE regulation, we performed an unbiased high-throughput screening of known drugs and bioactive compounds in cultured human primary astrocytes, the major apoE-producing cell type in the brain. We have identified several small molecules that increase apoE secretion via previously unknown mechanisms, including those not co-inducing ABCA1. These newly identified compounds are active preferentially in human astrocytes but not in an astrocytoma cell line, furnishing new tools for investigating biological pathways underlying brain apoE production.</P>

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