Sierra Oncology is a clinical stage drug development company advancing next generation DNA Damage Response (DDR) therapeutics for the treatment of patients with cancer. Our lead product candidate, SRA737, is a potent, highly selective, orally bioavailable small molecule inhibitor of Checkpoint kinase 1 (Chk1). We are pursuing an innovative development plan for SRA737, which is currently being evaluated in two Phase 1/2 clinical trials in patients with advanced cancer. SRA737-01 is intended to evaluate SRA737's potential to induce synthetic lethality as monotherapy, while the SRA737-02 is intended to evaluate the combination of SRA737 potentiated by subtherapeutic, low dose gemcitabine. Concurrently, we are conducting preclinical research evaluating SRA737 in combination with other DDR-targeted agents, including PARP inhibitors, as well as with immuno-oncology therapeutics, that may guide a potential next wave of clinical development for our asset, possibly further broadening its therapeutic utility.
We are also advancing SRA141, a potent, selective, orally bioavailable small molecule inhibitor of cell division cycle 7 kinase (Cdc7). SRA141 is currently undergoing preclinical research in preparation for an Investigational New Drug Application (IND) submission to the U.S. Food and Drug Administration (FDA).