RE: Sierra release27 Jun 2019 13:08
Sierra Oncology Launches Campaign Exploring Non-Dilutive Strategic Options to Support Development of its DDR Assets
- Corporate prioritization of portfolio to focus resources on advancement of momelotinib -
- Exploring non-dilutive options to support future continued development of SRA737 and SRA141 -
VANCOUVER, June 27, 2019 /CNW/ - Sierra Oncology, Inc. (SRRA), a late-stage drug development company focused on advancing targeted therapeutics for the treatment of patients with significant unmet needs in hematology and oncology, today announced plans to prioritize its existing resources on the development of momelotinib, its differentiated Phase 3 drug candidate for the treatment of patients with myelofibrosis. Sierra also announced it has launched a campaign exploring non-dilutive strategic options to support the future continued development of its portfolio of potent and selective DDR (DNA Damage Response) assets, consisting of SRA737 (Chk1 inhibitor) and SRA141 (Cdc7 inhibitor).
"We recently reported compelling proof-of-concept clinical efficacy data for SRA737 at the 2019 ASCO Annual Meeting, demonstrating that this drug candidate has notable anti-cancer activity in multiple indications and a defined clinical path forward towards potential initial registration for the treatment of anogenital cancer, an indication with considerable unmet need. For SRA141, we have demonstrated a potentially novel mechanism of cytotoxicity and successfully completed the IND process with the FDA enabling the commencement of clinical trials," said Dr. Nick Glover, President and CEO of Sierra Oncology. "While we continue to advance the assets in our DDR portfolio and view them as promising oncology drug candidates that warrant further development, we are prioritizing our resources on our lead drug, momelotinib. To support the continued development of SRA737 and SRA141 in the future, we intend to seek non-dilutive strategic options."
About Sierra's DDR assets: SRA737 (targeting Chk1) and SRA141 (targeting Cdc7)
SRA737 is a potent, highly selective, orally bioavailable small molecule inhibitor of Checkpoint kinase 1 (Chk1), a key regulator of cell cycle progression and the DNA Damage Response (DDR). Tumors with high levels of replication stress become reliant on Chk1 to mitigate the potentially catastrophic consequences of excess genomic instability. Intrinsic sources of replication stress can include genetic alterations in tumor suppressors, oncogenes or DNA Damage Repair genes. SRA737+LDG is a novel drug combination, where non-cytotoxic low dose gemcitabine (LDG) acts as a potent extrinsic inducer of replication stress.
At the 2019 ASCO Annual meeting, Sierra reported preliminary efficacy data for SRA737 including a 30% Overall Response Rate in patients with anogenital cancer treated with SRA737+LDG , an indication for which the second line metastatic setting represents a significant unmet medical need with no approved therapies and very poor life expecta