Initial Clinical Activity Data
| • | | The complete response (CR) and complete response with incomplete blood count recovery (CRi) rate, as defined by Revised International Working Group (IWG) criteria was 83%, consisting of two patients (33%) who achieved a CR and three patients (50%) who achieved a CRi. |
| • | | Four of five patients (80%) who achieved a CR or CRi had a high monocytic expression score (MES), which may be associated with venetoclax resistance.1 |
| • | | Median time to CR/CRi response was 33 days (ranging from 25-88). |
| • | | Median duration of treatment was 76.5 days (ranging from 20-104) and median duration of follow-up was 107 days (ranging from 56-314). |
| • | | These early data compare favorably to the standard-of-care combination of venetoclax and azacitidine, which shows composite CR rates of 66% in newly diagnosed unfit AML patients.2 |
Advancing Tamibarotene in Newly Diagnosed Unfit AML
Based on the encouraging data reported today, Syros plans to advance into the randomized portion of the SELECT-AML-1 Phase 2 trial, which will evaluate the safety and efficacy of tamibarotene in combination with venetoclax and azacitidine in approximately 80 patients positive for RARA overexpression randomized 1:1 to treatment with tamibarotene and venetoclax/azacitidine vs. venetoclax/azacitidine. The trial will incorporate venetoclax dose modification guidelines based on the recently published European LeukemiaNet (ELN) recommendations,3 and will also evaluate the triplet regimen as a salvage therapy in patients who do not respond to venetoclax and azacitidine in the control arm. The randomized portion is expected to initiate in Q1 2023, with data expected in 2023 or 2024.
The ASH presentation is now available on the Publications and Abstracts section of the Syros website at www.syros.com.
Conference Call Information
Syros will host a conference call at 12:00 p.m. ET today to discuss these data, as well as review the unmet need in newly diagnosed, unfit AML. In addition to Syros management, the event will feature a presentation from Daniel Pollyea, M.D., M.S., Associate Professor of Medicine, Clinical Director of Leukemia Services, University of Colorado School of Medicine. To access the live event, please register here. In addition, a live webcast of the presentation will be available on the Investors & Media section of the Syros website at www.syros.com. An archived replay of the webcast will be available for approximately 30 days following the presentation.
About Syros Pharmaceuticals
Syros is redefining the power of small molecules to control the expression of genes. Based on its unique ability to elucidate regulatory regions of the genome, Syros aims to develop medicines that provide a profound benefit for patients with diseases that have eluded other genomics-based approaches. Syros is advancing a robust clinical-stage pipeline, including: tamibarotene, a first-in-class oral selective RARα agonist in patients with higher-risk myelodysplastic syndrome and acute myeloid leukemia with RARA gene overexpression; SY-2101, a novel oral form of arsenic trioxide in patients with acute promyelocytic leukemia; and SY-5609, a highly selective and potent oral CDK7 inhibitor in patients with select solid tumors. Syros also has multiple preclinical and discovery programs in oncology and monogenic diseases. For more information, visit www.syros.com and follow us on Twitter (@SyrosPharma) and LinkedIn.
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 Syros’ clinical development plans, including with respect to the progression of its clinical trials involving tamibarotene, the timing and impact of upcoming clinical data readouts, and Syros’ ability to deliver benefit to patients. The words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “hope,” “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