INVESTORS
Sierra Oncology to Present at the Wedbush PacGrow Healthcare Conference in New York

- Presentation scheduled for 2:30 pm ET on August 14, 2019 -

VANCOUVER, Aug. 7, 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 that Dr. Nick Glover, President and Chief Executive Officer, will present an overview of the company at 2:30 pm ET on Wednesday, August 14 at the Wedbush PacGrow Healthcare Conference being held in New York.

A live audio webcast and archive of the presentation will be accessible through the Sierra Oncology website at www.sierraoncology.com.

About Sierra Oncology

Sierra Oncology is a late stage drug development company focused on advancing targeted therapeutics for the treatment of patients with significant unmet medical needs in hematology and oncology.

Momelotinib, Sierra's lead drug candidate, is a potent, selective and orally-bioavailable JAK1, JAK2 & ACVR1 inhibitor with a differentiated therapeutic profile in myelofibrosis encompassing robust constitutional symptom improvements, a range of meaningful anemia benefits, including eliminating or reducing the need for frequent blood transfusions, and comparable spleen control to ruxolitinib. More than 1,200 subjects have received momelotinib since clinical studies began in 2009, including more than 800 subjects treated for myelofibrosis. Sierra plans to launch the MOMENTUM Phase 3 clinical trial in the fourth quarter of 2019 to support potential registration of momelotinib on a global basis. Momelotinib is wholly owned by Sierra Oncology and is covered by patents anticipated to provide potential exclusivity to 2040 in the United States.

Sierra is also developing a portfolio of DNA Damage Response (DDR) assets, consisting of SRA737 and SRA141, and is conducting a campaign intended to seek non-dilutive strategic options to support their further advancement.

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 DDR.

Tumors with high levels of replication stress become reliant on Chk1 to mitigate the potentially catastrophic consequences of excess genomic instability. SRA737+LDG, a novel drug combination where non-cytotoxic low dose gemcitabine (LDG) acts as a potent extrinsic inducer of replication stress, has demonstrated preliminary clinical efficacy.

SRA141 is a potent, selective, orally bioavailable small molecule inhibitor of Cell division cycle 7 kinase (Cdc7) with a potential novel mechanism of cytotoxicity. Sierra has successfully completed the IND process with the FDA enabling the commencement of clinical trials for SRA141 and has designed a potential Phase 1/2 trial with this drug candidate.

Sierra Oncology retains the global commercialization rights to momelotinib, SRA737 and SRA141.

For more information, please visit www.sierraoncology.com.

Cautionary Note on Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995, including, but not limited to, statements regarding Sierra Oncology's expectations from current data, anticipated clinical development activities, timing of the initiation of MOMENTUM, expected timing of the execution of, and expected results from, non-dilutive strategic options, and potential benefits of Sierra Oncology's lead product candidate and other product candidates. All statements other than statements of historical fact are statements that could be deemed forward-looking statements. These statements are based on management's current expectations and beliefs and are subject to a number of risks, uncertainties and assumptions that could cause actual results to differ materially from those described in the forward-looking statements. Such forward-looking statements are subject to risks and uncertainties, including, among others, the risk that Sierra Oncology may be unable to successfully develop and commercialize product candidates, product candidates may not demonstrate safety and efficacy or otherwise produce positive results, Sierra Oncology may experience delays in the preclinical and anticipated clinical development of its product candidates, Sierra Oncology may be unable to acquire additional assets to build a pipeline of additional product candidates, Sierra Oncology's third-party manufacturers may cause its supply of materials to become limited or interrupted or fail to be of satisfactory quantity or quality, Sierra Oncology's cash resources may be insufficient to fund its current operating plans and it may be unable to raise additional capital when needed, Sierra Oncology may be unable to obtain and enforce intellectual property protection for its technologies and product candidates and the other factors described under the heading "Risk Factors" set forth in Sierra Oncology's filings with the Securities and Exchange Commission from time to time. Sierra Oncology undertakes no obligation to update the forward-looking statements contained herein or to reflect events or circumstances occurring after the date hereof, other than as may be required by applicable law.

SOURCE Sierra Oncology

For further information: James Smith, Vice President, Corporate Affairs, Sierra Oncology, 604.558.6536, investors@sierraoncology.com