一种高效且特异的 PARP1 降解剂,基于 Rucaparib。 iRucaparib-AP6 是一种 “非捕获性” PARP1 降解剂,可同时阻断 PARP1 的催化活性和支架作用。
iRucaparib-AP6 is a potent and selective small-molecule degrader of PARP1. iRucaparib-AP6 blocks the enzymatic activity of PARP1 in vitro, and PARP1-mediated poly-ADP-ribosylation signaling in intact cells. This strategy mimics PARP1 genetic depletion, which enables the pharmacological decoupling of PARP1 inhibition from PARP1 trapping. Finally, by depleting PARP1, iRucaparib-AP6 protects muscle cells and primary cardiomyocytes from DNA-damage-induced energy crisis and cell death. In summary, these compounds represent 'non-trapping' PARP1 degraders that block both the catalytic activity and scaffolding effects of PARP1, providing an ideal approach for the amelioration of the various pathological conditions caused by PARP1 hyperactivation.