CK1α

BROOKLINE, Mass.--(BUSINESS WIRE)-- Edgewood Oncology, a clinical-stage biotechnology company focused on delivering BTX-A51 to patients with hematologic malignancies and genetically-defined solid tumors, today announced that the first two patients with metastatic breast cancer were treated with BTX-A51, a multi-specific kinase inhibitor of casein kinase 1 alpha (CK1α) and cyclin-dependent kinases 7 and 9 (CDK7 and CDK9), that synergistically targets master regulators of cancer. BTX-A51 is being evaluated in a Phase 2a study for the treatment of estrogen receptor positive / human epidermal growth factor receptor 2 negative (ER+/HER2-) metastatic breast cancer with and without GATA binding protein 3 (GATA3) mutations. GATA3 is a protein that helps maintain healthy breast cells and mutations in this protein, which are found in approximately 15% of breast cancer cases, are associated with shorter progression free (PFS) and overall survival (OS). Moreover, these mutations are almost always accompanied by a wild type (non-mutated) p53 tumor suppressor protein. Recent studies have shown that targeting MDM2, a molecule that degrades the p53 protein, could be particularly effective in treating cancers with these GATA3 mutations. Due to its ability to reduce MDM2 expression, Edgewood Oncology is testing the hypothesis that BTX-A51 may be beneficial in this breast cancer sub-population. “This represents an important milestone for both Edgewood Oncology and for patients with ER+/HER2- breast cancer, particularly those with a GATA3 mutation, who need better treatment options targeted to their underlying mutation profile,” said Zung L. Thai, M.D., Ph.D., chief medical officer of Edgewood Oncology. “Moreover, while CDK4/6 inhibitors remain a cornerstone of current treatment regimens, resistance to these therapies poses a formidable challenge. By targeting CDK7 and CDK9, key regulators of cell cycle progression, BTX-A51 not only aims to circumvent this resistance but also to transform the treatment landscape.” The ongoing Phase 2a trial of BTX-A51 is a multicenter, open-label, nonrandomized, multiple dose study evaluating the safety, toxicity, pharmacokinetics and preliminary efficacy of BTX-A51 in patients with ER+/HER2- metastatic breast cancer with and without GATA3 mutations. Multiple sites for the clinical study are open for enrollment. For more information, visit clinicaltrials.gov (NCT04872166). About Edgewood Oncology Edgewood Oncology is a clinical-stage biotechnology company that was founded to deliver on the promise of BTX-A51 for patients with hematologic malignancies and genetically-defined solid tumors. BTX-A51 is an investigational, first-in-class, small molecule, multi-selective kinase inhibitor of CK1α, CDK7 and CDK9 that synergistically co-targets master regulators of cancer to activate programmed cell death, or apoptosis. BTX-A51 holds promise in acute myeloid leukemia and genetically-defined solid tumors, which are the focus of ongoing clinical programs. For more information, please visit , and follow us on LinkedIn.

Data published today by Dana-Farber Cancer Institute and Hebrew University-Hadassah Medical School to be presented at the American Association of Cancer Research (AACR) Annual Meeting 2024 BROOKLINE, Mass.--(BUSINESS WIRE)-- Edgewood Oncology, a clinical-stage biotechnology company focused on delivering BTX-A51 to patients with hematologic malignancies and genetically-defined solid tumors, today announced the publication of new preclinical data from a study of BTX-A51 in human liposarcoma (LPS) conducted by Dana-Farber Cancer Institute and Hebrew University-Hadassah Medical School to be presented at the AACR Annual Meeting 2024 in San Diego. BTX-A51 is a first-in-class, small molecule, multi-selective kinase inhibitor of casein kinase 1 alpha (CK1α) as well as the transcriptional regulators cyclin-dependent kinases 7 and 9 (CDK7 and CDK9) that synergistically co-targets master regulators of cancer to promote programmed cell death, or apoptosis. The presentation (Abstract 604), “Targeting casein kinase 1 alpha (CK1alpha) and transcriptional CDKs (CDK7/9) in human liposarcomas,” highlighted findings for BTX-A51 in preclinical human models of LPS. The data demonstrate that BTX-A51 has preclinical efficacy in treating patient-derived LPS in cell lines and human xenograft models and provides insight into the synergy gained by inhibiting both CK1α and CDK9. “Dedifferentiated liposarcomas (DDLPS) are rare tumors derived from precursors of fat cells which can occur anywhere in the body. Patients with metastatic DDLPS face a life-threatening disease in need of more effective therapeutic options, which we hope to develop by taking advantage of vulnerabilities in LPS that have been uncovered by recent research on the abnormal DNA and other molecular characteristics of LPS,” said George Demetri, M.D., Professor of Medicine and director of the Sarcoma Center at Dana-Farber. “Based on these data, we believe that it is justified to move BTX-A51 into a clinical trial for patients with LPS, which we will plan to open soon for enrollment.” Liposarcomas are universally characterized by amplification of the mouse double minute 2 homolog (MDM2) gene, which leads to destruction of the normal (non-mutated, also known as “wild type”) p53. The data demonstrate that BTX-A51 significantly reduces the abnormal overexpression of MDM2 in multiple patient-derived LPS cell lines, leading to upregulation of p53 expression and ultimately apoptosis. Finally, BTX-A51 was demonstrated to be well-tolerated and effective in an LPS patient-derived xenograft model. “We’re pleased that investigators at Dana-Farber have taken an interest in BTX-A51, which is currently being evaluated in a Phase 2 combination study with azacitidine in patients with relapsed or refractory (R/R) AML,” said David N. Cook, Ph.D., chief executive officer of Edgewood Oncology. “These data also suggest the potential for BTX-A51 in cancers with MDM2 amplifications, a group of genetically defined tumors that span multiple tissue types suggesting broader potential.” Additional Details about the Study Using three different CDK9-selective inhibitors in human LPS cell lines, the authors showed that CDK9 inhibition suppressed cell growth and induced apoptosis by decreasing MDM2 levels while inducing expression of p53. It was also demonstrated that the potency of CDK9 inhibitors is significantly enhanced upon CK1α depletion. These data led to the investigation of BTX-A51, which targets CK1α and CDK9 as well as CDK7, in LPS cells and has previously been shown to inhibit these kinases with nanomolar efficacy in AML models. BTX-A51 potently reduced expression of MDM2 with marked induction of p53, resulting in apoptosis of LPS cells. BTX-A51 also reduces expression of MCL1 and primes LPS cell lines and primary LPS cells for BIM-induced apoptosis, as demonstrated by BH3 profiling. Importantly, preliminary in vivo data in an LPS patient-derived xenograft model reveal that BTX-A51 is well-tolerated under conditions that inhibit tumor growth. About Edgewood Oncology Edgewood Oncology is a clinical-stage biotechnology company that was founded to deliver on the promise of BTX-A51 for patients with hematologic malignancies and genetically-defined solid tumors. BTX-A51 is a novel small molecule, multi-kinase inhibitor that synergistically co-targets master regulators of cancer to activate programmed cell death, or apoptosis. BTX-A51 holds promise in acute myeloid leukemia and genetically-defined solid tumors, which are the focus of ongoing clinical programs. For more information, please visit , and follow us on LinkedIn. View source version on businesswire.com: Contacts Tracy Lessor TLOW Communications, LLC 617-519-9827 tracy@tlowcommunications.com Source: Edgewood Oncology View this news release online at:

The global market for AML therapies is expected to be worth $6.62bn in 2031, according to a GlobalData report. Image Credit: LALAKA / Shutterstock. Massachusetts-based company Edgewood Oncology has raised $20m in Series A to advance the clinical development of its lead cancer therapy BTX-A51. The Series A funding round was led by US-based venture fund Alta Partners. Edgewood Oncology expects the funds to finance multiple clinical trials into 2026. BTX-A51 is a multi-kinase inhibitor of casein kinase 1 alpha (CK1α) and cyclin-dependent kinases 7 and 9 (CDK7 and CDK9). Edgewood acquired the rights to the therapy from the Hebrew University of Jerusalem in 2023. Edgewood is evaluating BTX-A51 in an open-label Phase I/II trial (NCT04243785) as a monotherapy and in combination with a chemotherapeutic, azacitidine, in patients with relapsed/refractory acute myeloid leukaemia (r/r AML). In Phase Ia, the BTX-A51 monotherapy showed a favourable safety profile along with encouraging antileukemic activity. The combination cohort started enrolment in December 2023. The cohort is expected to enrol up to 30 participants. The cohort aims to evaluate the response rate, safety, toxicity, and pharmacokinetics of the combination therapy of BTX-A51 and azacytidine in patients with r/r AML. See Also: Oncology in 2024: The clinical trial trends reshaping the role of CROs Avenzo Therapeutics secures $150m to progress oncology pipeline The global market for AML therapies is expected to be worth $6.62bn in 2031, according to a GlobalData report . The AML therapy pipeline consists of more than 200 drugs in early development, with the majority of drugs in development being enzyme inhibitors, according to GlobalData Pharma Intelligence Center. GlobalData is the parent company of Pharmaceutical Technology . Edgewood is also investigating BTX-A51 as a treatment for solid tumours and non-Hodgkin lymphoma, open-label Phase I trial (NCT04872166). The study expects to enrol up to 116 participants and is estimated to be completed in May 2027. The company also plans to initiate a Phase II trial evaluating BTX-A51 in breast cancer patients with a genetically defined profile in Q2 2024. Advances in AML therapies include Daiichi Sankyo ’s Vanflyta (quizartinib). In November 2023, the European Commission (EC) approved Vanflyta as an add-on therapy for newly diagnosed fms-like tyrosine kinase 3 internal tandem duplication (FLT3-ITD) positive AML in adults. In September 2023, Mendus’s cancer vaccine, vividencel, received fast-track designation from the US Food and Drug Administration (FDA). A month later, Sellas Life Sciences Group’s CDK9 inhibitor, SLS009, received an orphan drug designation from the FDA. AML therapies in early development include Aptose Biosciences ’ tuspetinib. The company started the Phase I/II APTIVATE trial evaluating the drug’s pharmacodynamics, tolerability, safety, and pharmacokinetics in r/r AML patients in January. In September 2023, Foghorn Therapeutics dosed the first patient in the Phase I trial evaluating the combination therapy of FHD-286 and chemotherapy in patients with r/r AML.