Monte Rosa reports breakthrough in breast cancer treatment

Published 28/04/2025, 12:16
Monte Rosa reports breakthrough in breast cancer treatment

BOSTON - Monte Rosa Therapeutics, Inc. (Nasdaq: GLUE), a clinical-stage biotechnology company currently valued at $311 million, has announced promising preclinical results for its novel cyclin-dependent kinase 2 (CDK2) molecular glue degrader (MGD), MRT-51443, in treating hormone receptor-positive, human epidermal growth factor receptor 2-negative (HR-positive/HER2-negative) breast cancer. The company’s stock has shown significant momentum with a 13% gain over the past week, though it remains below its 52-week high of $12.40. According to InvestingPro analysis, the company maintains a strong financial position with more cash than debt on its balance sheet. The findings will be presented at the American Association for Cancer Research (AACR) Annual Meeting 2025, which is currently taking place in Chicago, IL.

The preclinical data suggests that MRT-51443, when used in combination with a CDK4/6 inhibitor and anti-estrogen therapy, achieved superior tumor regression in vivo compared to the standard of care which includes CDK4/6 inhibition and anti-estrogen therapy alone. This combination therapy also showed potential in delaying resistance to CDK4/6 inhibitors, a common issue faced in breast cancer treatment.

Sharon Townson, Ph.D., Chief Scientific Officer at Monte Rosa Therapeutics, highlighted the significance of these findings, stating that the combination drove notably deeper tumor responses. MRT-51443’s high selectivity and oral administration route could offer a differentiated therapy option with fewer toxicities for patients with HR-positive/HER2-negative breast cancer. InvestingPro data shows the company maintains a healthy current ratio of 2.4, indicating strong ability to fund its development programs. Get access to 10+ additional exclusive ProTips and comprehensive financial metrics with an InvestingPro subscription.

MRT-51443 exhibited strong potency and selectivity, outperforming several clinical-stage small molecule CDK2 inhibitors in cellular assays. In particular, in the MCF7 breast cancer model, the use of MRT-51443 in combination therapies resulted in a median tumor growth of -77% versus -3% for the current standard of care.

CDK2 is a critical enzyme in cell cycle progression and is associated with cancer proliferation. While CDK4/6 inhibitors are approved for treating HR-positive/HER2-negative breast cancer, resistance often develops due to tumor reliance on CDK2. MRT-51443’s targeted degradation of CDK2, without detectable off-target activity, represents a potentially novel approach for providing more sustained clinical responses.

Monte Rosa Therapeutics is focused on developing MGD-based medicines for serious diseases, utilizing its QuEEN™ discovery engine. The company is planning an Investigational New Drug (IND) submission for its cell cycle program in 2026.

The information in this article is based on a press release statement from Monte Rosa Therapeutics, Inc. The company has a strategic collaboration with Roche for cancer and neurological diseases and a global license agreement with Novartis for advancing VAV1-directed MGDs. However, the forward-looking statements in the press release are subject to various risks and uncertainties and should not be seen as guarantees of future performance.

In other recent news, Monte Rosa Therapeutics reported fourth-quarter revenue of $60.64 million, significantly surpassing the analyst consensus estimate of $51.19 million. This marked a substantial revenue generation for the company, primarily driven by collaboration agreements with Roche and Novartis. Monte Rosa also reported a net income of $13.4 million for the quarter, a notable improvement from the net loss of $33.3 million in the same period last year. The company’s financial position was further strengthened by a $150 million upfront payment from a licensing agreement with Novartis for VAV1 molecular glue degraders. Additionally, Monte Rosa shared updates on its clinical programs, including promising early results from its MRT-2359 study in castration-resistant prostate cancer patients. The company plans to advance its MRT-6160 program into Phase 2 studies following positive Phase 1 results, which showed deep VAV1 degradation and a favorable safety profile. Monte Rosa ended the quarter with $377 million in cash and equivalents, which is expected to fund operations into 2028.

This article was generated with the support of AI and reviewed by an editor. For more information see our T&C.

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