ST7612AA1, a Thioacetate-ω(γ-lactam carboxamide) Derivative Selected from a Novel Generation of Oral HDAC Inhibitors
摘要:
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.
A novel bioresponsive self-immolative spacer based on aza-quinone methide reactivity for the controlled release of thiols, phenols, amines, sulfonamides or amides
stimulus. The spacer is based on the structure of (5-nitro-2-pyrrolyl)methanol (NPYM-OH), which was used for the direct alkylation of the functional groups mentioned above. The spacer is metabolically stable and has three indispensable sites for bioconjugation: the bioresponsive trigger, the conjugated 1,6 self-immolative system and a third arm suitable for conjugation with a carrier or other modifiers. Release
HDAC INHIBITORS-BASED ANTIBODY DRUG CONJUGATES (ADCs) AND USE IN THERAPY
申请人:ALFASIGMA S.P.A.
公开号:US20210128740A1
公开(公告)日:2021-05-06
The present invention relates to novel Histone Deacetylase Inhibitors (HDACi)-based antibody drug conjugates particularly with antibodies directed to ErbB, ErbB2 and ErbB3 receptors, pharmaceutical compositions comprising said antibodies as well as to their use in the treatment of cancer or tumor and other diseases where a modulation of one or more histone deacetylase isoforms can be effective for therapeutic interventions.
ST7612AA1, a Thioacetate-ω(γ-lactam carboxamide) Derivative Selected from a Novel Generation of Oral HDAC Inhibitors
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.
Antibody drug conjugates (ADCs) charged with HDAC inhibitor for targeted epigenetic modulation
作者:Elena Cini、Valentina Faltoni、Elena Petricci、Maurizio Taddei、Laura Salvini、Giuseppe Giannini、Loredana Vesci、Ferdinando Maria Milazzo、Anna Maria Anastasi、Gianfranco Battistuzzi、Rita De Santis
DOI:10.1039/c7sc05266a
日期:——
A new weapon is added to the ADC arsenal, a thiol based HDAC inhibitor. Low toxic, hits the target and stops tumor growth in many mouse models.