Cirtuvivint/Olaparib in Breast Cancer Susceptibility Gene/Homologous Recombination Deficiency Platinum Resistant Ovarian Cancer

Cirtuvivint (SM08502) is a first in class pan CDC-like kinase (CLK) and dual specificity tyrosine kinase (DYRK) inhibitor with suspected multiple anti-tumor mechanisms of action, including Wnt inhibition.

NCI Definition - A small molecule inhibitor of the nuclear enzyme poly(ADP-ribose) polymerase (PARP) with potential chemosensitizing, radiosensitizing, and antineoplastic activities. Olaparib selectively binds to and inhibits PARP, inhibiting PARP-mediated repair of single strand DNA breaks; PARP inhibition may enhance the cytotoxicity of DNA-damaging agents and may reverse tumor cell chemoresistance and radioresistance. PARP catalyzes post-translational ADP-ribosylation of nuclear proteins and can be activated by single-stranded DNA breaks.