Biochem/physiol Actions
RBPJ Inhibitor-1 (RIN1) is a selective inhibitor against the transcription factor RBPJ. RIN1 blocks RBPJ-SHARP transcriptional repressor complex formation, inhibits RBPJ-mediated Notch intracellular domain (NICD) transcription activity (IC50/Emax = 180 nM/82% and 190 nM/88% using Notch2 ICD or Notch3 ICD, respectively), as well as NICD-independent transcription activity of RBPJ-VP16 (IC50 = 200 nM, Emax = 81%). RIN1 inhibits Notch-driven cancer proliferation (by ~70% post 4-day 10 μM RIN1 treatment; Jurkat) and promotes muscle differentiation (0.6 μM for 4 days; C2C12 myoblasts).
Selective transcription factor RBPJ inhibitor that inhibits cancer proliferation and promotes muscle differentiation.