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ACS chemical biology v.12 no.1, 2017년, pp.132 - 141   SCIE
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Phenotypic Screen for Cardiac Regeneration Identifies Molecules with Differential Activity in Human Epicardium-Derived Cells versus Cardiac Fibroblasts

Paunovic, Amalia I. (Discovery Sciences, AstraZeneca, Mereside, Alderley Park, Macclesfield SK10 4TG, Cheshire, ) ; Drowley, Lauren (Discovery Sciences, AstraZeneca R&D Darwin, 310 Milton Science Park, Milton Rd., Cambridge, CB4 0WG, ) ; Nordqvist, Anneli (Molecular Cell Biology, Leiden University Medical Center, Leiden, ) ; Ericson, Elke ; Mouchet, Elizabeth ; Jonebring, Anna ; Grönberg, Gunnar ; Kvist, Alexander J. ; Engkvist, Ola ; Brown, Martin R. ; Gedda, Karin ; Goumans, Marie-José ; Wang, Qing-Dong ; Plowright, Alleyn T. ;
  • 초록  

    Activation and proliferation of resident cardiac progenitor cells has therapeutic potential to repair the heart after injury. However, research has been impeded by a lack of well-defined and characterized cell sources and difficulties in translation to screening platforms. Here, we describe the development, validation, and use of a 384-well phenotypic assay in primary human epicardium-derived cells (EPDCs) to identify compounds that induce proliferation while maintaining the progenitor phenotype. Using this assay, we screened 7400 structurally diverse compounds where greater than 90% are biologically annotated and known to modulate a broad range of biological targets. From the primary screen, we identified and validated hits and expanded upon the lead molecules of interest. A counterscreen was developed in human cardiac fibroblasts to filter out compounds with a general proliferative effect, after which the activity of selected molecules was confirmed across multiple EPDC donors. To further examine the mechanism of action of compounds with annotated targets, we performed knockdown experiments to understand whether a single known target was responsible for the proliferative effect, confirming results with protein expression and activity assays. Here, we were able to show that the annotated targets of compounds of interest were not responsible for the proliferative effect, which highlights potential differences in cell types and signaling pathways and possible polypharmacology. These studies demonstrate the feasibility of using relevant human primary cells in a phenotypic screen to identify compounds as novel biological tools and starting points for drug discovery projects, and we disclose the first small molecules to proliferate human primary EPDCs. Graphic Abstract ACS Electronic Supporting Info


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