Mivebresib is a potent and orally available bromodomain and extraterminal domain (BET) bromodomain inhibitor. Mivebresib binds to BRD4 with a Ki of 1.5 nM.
Mivebresib inhibit DHT-stimulated transcription of AR target genes without significant effect on AR protein expression. In addition to blocking the transcription activation downstream of AR, Mivebresib is also a potent inhibitor of MYC and the TMPRSS2-ETS fusion proteins[1].
References:
[1]. EJ Faivre et al. Abstract 4694: ABBV-075, a novel BET family inhibitor, disrupts critical transcription programs that drive prostate cancer growth to induce potent anti-tumor activity in vitro and in vivo