Structure−Activity Relationship Studies of Phenanthridine-Based Bcl-XL Inhibitors
摘要:
Despite their structural similarities, the natural products chelerythrine (5) and sanguinarine (6) target different binding sites on the pro-survival Bcl-X-L protein. This paper details the synthesis of phenanthridine-based analogues of the natural products that were used to probe this difference in binding profiles. The inhibitory constants for these compounds were then measured in a fluorescence polarization assay against Bcl-X-L. and the tagged Bak-BH3 peptide. The results led to structure-activity relationship studies, which identified the structural motifs required for binding-site specificity as well as inhibitory activity. We also identified synthetic analogues of the natural products that display similar binding modes but with more potent IC50 values.
High-throughput methods of screening agents for activities affecting renal, cardiac, blood or lymphatic vascular development and functions in amphibians in multiwell plates are provided. Also provided are novel compounds that modulate blood and lymphatic vascular development.