Sierra Oncology to host Program Update in New York on February 27th

- Sierra also to present at the BIO CEO & Investor Conference in New York on February 12^th -

VANCOUVER, Feb. 6, 2018 /PRNewswire/ - Sierra Oncology, Inc. (Nasdaq: SRRA), a clinical stage drug development company focused on advancing next generation DNA Damage Response (DDR) therapeutics for the treatment of patients with cancer, today announced it will host a Program Update on Tuesday, February 27^th from 10:00 a.m. – 12:00 p.m. Eastern Time (ET) at the Lotte New York Palace in New York, NY.

During the event, the senior management team from Sierra Oncology will present a strategic update on the development programs for its two DDR drug candidates: SRA737, a highly selective, orally bioavailable Chk1 inhibitor; and SRA141, a highly selective, orally bioavailable Cdc7 inhibitor. The company will be joined by Dr. Udai Banerji, Chief Investigator for Sierra's ongoing SRA737 Phase 1/2 clinical studies, and Dr. Alan D'Andrea, a member of Sierra's DDR Advisory Committee.

• Dr. Udai Banerji is the Cancer Research UK Reader in Molecular Cancer Pharmacology at The Institute of Cancer Research, London, and a Consultant Medical Oncologist at The Royal Marsden NHS Foundation Trust. He leads the Clinical Pharmacology and Trials team at The Institute of Cancer Research (ICR) and is the Deputy Director of the Drug Development Unit at the ICR and The Royal Marsden.
  
  
• Dr. Alan D'Andrea is the Fuller-American Cancer Society Professor of Radiation Oncology at Harvard Medical School and the Director of the Center for DNA Damage and Repair at the Dana-Farber Cancer Institute. Dr. D'Andrea is internationally known for his research in the area of DNA damage and DNA repair, and participates in a wide range of clinical trials, largely focused on ovarian, breast, prostate, and bladder cancers.

Event registration and webcast information are available through the Sierra Oncology website at www.sierraoncology.com. An archive of the presentation will be accessible after the event through the Sierra Oncology website.

BIO CEO & Investor Conference in New York
Dr. Nick Glover, President and Chief Executive Officer, will present an overview of the company, scheduled for 11:30 a.m. ET on Monday, February 12^th at the BIO CEO & Investor Conference being held in New York, NY. 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 clinical stage drug development company advancing next generation DNA Damage Response (DDR) therapeutics for the treatment of patients with cancer. Our lead drug candidate, 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 Replication Stress response. SRA737 is currently being investigated in two Phase 1/2 clinical trials in patients with advanced cancer: a monotherapy study evaluating SRA737 in patients with tumors identified to have genetic aberrations hypothesized to confer sensitivity to Chk1 inhibition via synthetic lethality, and a drug combination study evaluating SRA737 potentiated by low-dose gemcitabine. Sierra is also preparing for potential clinical studies of SRA737 in combination with other agents where there is a strong biological rationale for synergy with Chk1 inhibition, such as immune oncology therapeutics and other DDR inhibitors including PARP inhibitors.

Sierra Oncology is also advancing SRA141, a potent, selective, orally bioavailable small molecule inhibitor of Cell division cycle 7 kinase (Cdc7) undergoing preclinical development. Cdc7 is a key regulator of DNA replication and is involved in the DDR network, making it a compelling emerging target for the potential treatment of a broad range of tumor types. 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 market and industry position, expectations from current data, anticipated clinical development and potential benefits of Sierra Oncology's 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, SRA737 and SRA141 are at early stages of development and may not demonstrate safety and efficacy or otherwise produce positive results, Sierra Oncology may experience delays in the preclinical and anticipated clinical development of SRA737 or SRA141, 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