CAMBRIDGE, Mass.--(BUSINESS WIRE)--Syros Pharmaceuticals (NASDAQ: SYRS), a biopharmaceutical company pioneering the discovery and development of medicines to control the expression of disease-driving genes, today announced that new preclinical data on SY-1365, its first-in-class selective cyclin-dependent kinase 7 (CDK7) inhibitor currently in a Phase 1 clinical trial in advanced solid tumors, show anti-tumor activity in in vitro and in vivo models of blood cancers. Additionally, the data point to a potential biomarker of response to SY-1365 and synergistic activity with a BCL2 inhibitor in preclinical models of acute myeloid leukemia (AML). These data are being presented at the 59th American Society of Hematology (ASH) Annual Meeting and Exposition.
“We believe SY-1365 represents a promising therapeutic approach across a number of solid tumors and blood cancers,” said Eric R. Olson, Ph.D., Chief Scientific Officer of Syros. “These new preclinical data underscore the power of our gene control platform to elucidate the underlying biology and mechanism of action of SY-1365, furthering our ability to identify biomarkers to select the patients most likely to respond and to identify rational combination approaches with the potential to provide a profound benefit for patients.”
Syros scientists analyzed the anti-tumor activity of SY-1365 in a broad panel of leukemia and lymphoma cell lines, as well as in primary cell cultures from leukemia patients. They then grouped the cell lines according to sensitivity to SY-1365 and looked for markers of response using Syros’ gene control platform. Based on the findings, Syros evaluated SY-1365 in combination with venetoclax, a BCL2 inhibitor, in preclinical studies. The data showed that:
- SY-1365 inhibited proliferation in vitro in leukemia and lymphoma cells, as well as in leukemia cells from primary patient cultures.
- SY-1365 induced cell death in the majority of AML, leukemia and lymphoma cell lines tested.
- SY-1365 inhibited tumor growth, including inducing tumor regression, using biweekly dosing in preclinical mouse models of AML.
- Sensitivity to SY-1365 was associated with low expression of the mitochondrial apoptosis antagonist BCL2L1 in AML and other leukemia cell lines.
- SY-1365 lowered expression of MCL1, a gene in the mitochondrial apoptosis pathway that is known to inhibit apoptosis.
- SY-1365 synergized with venetoclax in AML cell lines in vitro and increased tumor growth inhibition when combined with venetoclax, compared to either SY-1365 or venetoclax alone.
The Phase 1 trial of SY-1365 is a multi-center, open-label trial enrolling patients with advanced solid tumors. The primary objective of the trial is to assess the safety and tolerability of escalating doses of SY-1365, with the goal of establishing a maximum tolerated dose and a recommended Phase 2 dose and regimen. The dose-escalation phase is open and expected to enroll approximately 35 solid tumor patients for whom standard curative or palliative measures do not exist or are no longer effective. Following the dose-escalation phase, expansion cohorts are planned to further evaluate the safety and anti-tumor activity of SY-1365 in patients with transcriptionally driven tumors and to enroll patients with tumors of any histology in a cohort focused on analyzing biopsied tumor tissue. Additional details about the trial can be found using the identifier NCT03134638 at www.clinicaltrials.gov. Syros expects to present initial clinical data from this study in 2018.
About Syros Pharmaceuticals
Syros Pharmaceuticals is
pioneering the understanding of the non-coding region of the genome to
advance a new wave of medicines that control expression of
disease-driving genes. Syros has built a proprietary platform that is
designed to systematically and efficiently analyze this unexploited
region of DNA in human disease tissue to identify and drug novel targets
linked to genomically defined patient populations. Because gene
expression is fundamental to the function of all cells, Syros’ gene
control platform has broad potential to create medicines that achieve
profound and durable benefit across a range of diseases. Syros is
currently focused on cancer and immune-mediated diseases and is
advancing a growing pipeline of gene control medicines. Syros’ lead drug
candidates are SY-1425, a selective RARα agonist in a Phase 2 clinical
trial for genomically defined subsets of patients with acute myeloid
leukemia and myelodysplastic syndrome, and SY-1365, a selective CDK7
inhibitor in a Phase 1 clinical trial for patients with advanced solid
tumors, including transcriptionally dependent cancers such as triple
negative breast, small cell lung and ovarian cancers. Led by a team with
deep experience in drug discovery, development and commercialization,
Syros is located in Cambridge, Mass.
Cautionary Note Regarding Forward-Looking Statements
This
press release contains forward-looking statements within the meaning of
The Private Securities Litigation Reform Act of 1995, including without
limitation statements regarding the therapeutic benefit of SY-1365 in
solid tumors and blood cancers; the utility of any predictive biomarker
of response to SY-1365; the reporting of initial clinical data from the
ongoing Phase 1 clinical trial of SY-1365 in 2018; the ability to
identify an appropriate dose and schedule to support expansion of the
Phase 1 clinical trial of SY-1365, and the benefits of Syros’ gene
control platform. The words ‘‘anticipate,’’ ‘‘believe,’’ ‘‘continue,’’
‘‘could,’’ ‘‘estimate,’’ ‘‘expect,’’ ‘‘intend,’’ ‘‘may,’’ ‘‘plan,’’
‘‘potential,’’ ‘‘predict,’’ ‘‘project,’’ ‘‘target,’’ ‘‘should,’’
‘‘would,’’ and similar expressions are intended to identify
forward-looking statements, although not all forward-looking statements
contain these identifying words. Actual results or events could differ
materially from the plans, intentions and expectations disclosed in
these forward-looking statements as a result of various important
factors, including Syros’ ability to: advance the development of its
programs, including SY-1365, under the timelines it projects in current
and future clinical trials; demonstrate in any current and future
clinical trials the requisite safety, efficacy and combinability of its
drug candidates; replicate scientific and non-clinical data in clinical
trials; successfully develop a companion diagnostic test to identify
patients with predictive biomarkers; obtain and maintain patent
protection for its drug candidates and the freedom to operate under
third party intellectual property; obtain and maintain necessary
regulatory approvals; identify, enter into and maintain collaboration
agreements with third parties; manage competition; manage expenses;
raise the substantial additional capital needed to achieve its business
objectives; attract and retain qualified personnel; and successfully
execute on its business strategies; risks described under the caption
“Risk Factors” in Syros’ Quarterly Report on Form 10-Q for the quarter
ended September 30, 2017, which is on file with the Securities and
Exchange Commission; and risks described in other filings that Syros
makes with the Securities and Exchange Commission in the future. Any
forward-looking statements contained in this press release speak only as
of the date hereof, and Syros expressly disclaims any obligation to
update any forward-looking statements, whether because of new
information, future events or otherwise.
