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Zap-Pano: a Photocaged Prodrug of the KDAC Inhibitor Panobinostat. | LitMetric
We report the synthesis and biological evaluation of a light-activated (caged) prodrug of the KDAC inhibitor panobinostat (Zap-Pano). We demonstrate that addition of the 4,5-dimethoxy-2-nitrobenzyl group to the hydroxamic acid oxygen results in an inactive prodrug. In two cancer cell lines we show that photolysis of this compound releases panobinostat and an unexpected carboxamide analogue of panobinostat. Photolysis of Zap-Pano causes an increase in H3K9Ac and H3K18Ac, consistent with KDAC inhibition, in an oesophageal cancer cell line (OE21). Irradiation of OE21 cells in the presence of Zap-Pano results in apoptotic cell death. This compound is a useful research tool, allowing spatial and temporal control over release of panobinostat.
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