ST7612AA1, a Thioacetate-ω(γ-lactam carboxamide) Derivative Selected from a Novel Generation of Oral HDAC Inhibitors
作者:Giuseppe Giannini、Loredana Vesci、Gianfranco Battistuzzi、Davide Vignola、Ferdinando M. Milazzo、Mario Berardino Guglielmi、Marcella Barbarino、Mosè Santaniello、Nicola Fantò、Marco Mor、Silvia Rivara、Daniele Pala、Maurizio Taddei、Claudio Pisano、Walter Cabri
DOI:10.1021/jm5008209
日期:2014.10.23
A systematic study of medicinal chemistry aimed at identifying a new generation of HDAC inhibitors, through the introduction of a thiol zinc-binding group (ZBG) and of an amide-lactam in the ?-position of the polyethylene chain of the vorinostat scaffold, allowed the selection of a new class of potent pan-HDAC inhibitors (pan-HDACis). Simple, highly versatile, and efficient synthetic approaches were used to synthesize a library of these new derivatives, which were then submitted to a screening for HDAC inhibition as well as to a preliminary in vitro assessment of their antiproliferative activity. Molecular docking into HDAC crystal structures suggested a binding mode for these thiol derivatives consistent with the stereoselectivity observed upon insertion of amide-lactam substituents in the ?-position. ST7612AA1 (117), selected as a drug candidate for further development, showed an in vitro activity in the nanomolar range associated with a remarkable in vivo antitumor activity, highly competitive with the most potent HDAC inhibitors, currently under clinical trials. A preliminary study of PK and metabolism is also illustrated.