On August 8, 2024 Monte Rosa Therapeutics, Inc. (Nasdaq: GLUE), a clinical-stage biotechnology company developing novel molecular glue degrader (MGD)-based medicines, reported business highlights and financial results for the second quarter that ended June 30, 2024 (Press release, Monte Rosa Therapeutics, AUG 8, 2024, View Source [SID1234645615]).

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"The IND clearance of our VAV1-directed MGD MRT-6160 represents a major corporate milestone for Monte Rosa, signifying what we believe to be the first clinical-stage, rationally designed MGD for a non-oncology indication," said Markus Warmuth, M.D., Chief Executive Officer of Monte Rosa Therapeutics. "Our MRT-2359 program for MYC-driven solid tumors is in an ongoing Phase 1/2 study and we look forward to announcing the recommended Phase 2 dose, sharing updated clinical efficacy and safety results from the dose escalation arm of the trial, and initiating enrollment of our Phase 2 expansion cohorts in the second half of the year. Our second immunology/inflammation program, MRT-8102, a NEK7-directed MGD targeting diseases driven by IL-1β and the NLRP3 inflammasome, continues to advance and we expect to submit an IND application in the first half of next year. Our strategic collaboration with Roche has been progressing rapidly, and we are very pleased to announce today that we have reached our first set of research milestones, which we believe further validates the productivity of our QuEEN Discovery Engine. Our strong balance sheet, augmented by our recent financing, is expected to provide cash runway into H1 2027, funding the Company through multiple anticipated milestones including proof-of-concept readouts for our three lead programs."

RECENT HIGHLIGHTS

MRT-2359, GSPT1-directed MGD for MYC-driven solid tumors

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Monte Rosa continues to evaluate MRT-2359 in a Phase 1/2 clinical trial in MYC-driven solid tumors (NCT05546268). In June 2024, the Company announced that it had obtained encouraging initial safety and pharmacodynamic data from the 0.5 mg dose using the 21 days on, 7 days off regimen. This regimen represents dosing of MRT-2359 twice as frequently per cycle compared to the 5 days on, 9 days off regimen previously evaluated in this study. Based on the favorable safety assessment for the 0.5 mg dose, the Company continues to evaluate a higher 0.75 mg, 21 days on, 7 days off dose cohort. In the second half of the year, Monte Rosa expects to make a final determination of the MRT-2359 recommended Phase 2 dose, share updated clinical activity and safety results from the dose escalation arm of the trial, and initiate enrollment of MRT-2359 Phase 2 expansion cohorts.
MRT-6160, VAV1-directed MGD for systemic and neurological autoimmune/inflammatory diseases

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Monte Rosa reported that its Investigational New Drug (IND) submission for MRT-6160 has been accepted by the U.S. Food and Drug Administration (FDA). Initiation of a Phase 1 single ascending dose/multiple ascending dose (SAD/MAD) study is expected this summer and initial clinical results are anticipated in Q1 2025.
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In July, Monte Rosa reported the publication of a review article titled, VAV1 as a putative therapeutic target in autoimmune and chronic inflammatory diseases, co-authored by Prof. Dr. Markus F. Neurath, Friedrich-Alexander-University Erlangen-Nürnberg, and Prof. Leslie J. Berg, University of Colorado School of Medicine, in the peer-reviewed journal Trends in Immunology, a Cell Press journal. The publication highlights how novel approaches targeting VAV1 have therapeutic potential in T and B-cell-mediated autoimmune and chronic inflammatory diseases.
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In June, Monte Rosa presented preclinical data at the EULAR 2024 conference demonstrating that MRT-6160 inhibited disease progression, pro-inflammatory cytokines, and autoantibody production in the collagen-induced arthritis murine model of rheumatoid arthritis.
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In May, Monte Rosa presented preclinical data at Digestive Disease Week 2024 demonstrating that MRT-6160 inhibited colitis disease progression and colon inflammation, lowered inflammatory mucosal cytokines, and reduced expression of IBD-associated genes in a T-cell transfer murine model of colitis.
MRT-8102, NEK7-directed MGD for inflammatory diseases driven by IL-1β and the NLRP3 inflammasome

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In March, Monte Rosa announced the initiation of IND-enabling studies for MRT-8102, a first-in-class NEK7-directed MGD for the treatment of inflammatory diseases driven by interleukin-1β (IL-1β) and the NLRP3 inflammasome, critical elements of the inflammatory process. MRT-8102 has demonstrated highly favorable central nervous system (CNS) exposure and degradation in a study in non-human primates, supporting its potential development in neurologic indications and obesity, in addition to potential use in gout, pericarditis, and other peripheral inflammatory conditions. The Company is evaluating applications across multiple inflammatory disorders.
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Monte Rosa expects to submit an IND application for MRT-8102 in H1 2025.
CDK2 and Cyclin E1-directed MGD programs

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In May, Monte Rosa announced a new discovery program for CCNE1 (Cyclin E1)-directed MGDs for the treatment of CCNE1-amplified tumors. CCNE1, a key component of the cell cycle and a known driver of many cancers, is generally considered an undruggable target by conventional modalities.
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Monte Rosa is progressing both programs to development candidate nominations and expects to nominate a development candidate for the CDK2-directed MGD program by year end.
Additional Corporate Updates

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Monte Rosa announced today that it achieved pre-specified research milestones and earned milestone payments under its strategic collaboration and licensing agreement with Roche. In October 2023, Monte Rosa entered into a strategic collaboration and licensing agreement with Roche to discover and develop MGDs against targets in cancer and neurological diseases. Under the terms of the agreement, Monte Rosa received an upfront payment of $50 million and is eligible to receive future preclinical, clinical, commercial, and sales milestone payments that could exceed $2 billion, as well as tiered royalties.

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In May, the Company announced an underwritten public offering providing gross proceeds of approximately $100 million.
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In May, Monte Rosa announced three leadership team promotions: Sharon Townson, Ph.D., to Chief Scientific Officer; Phil Nickson, Ph.D., J.D., to Chief Business and Legal Officer; and Jennifer Champoux to Chief Operating Officer.
ANTICIPATED MILESTONES

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Announce the recommended Phase 2 dose for the MRT-2359 Phase 1/2 study and report Phase 1 clinical activity and safety results in H2 2024. The Company also plans to initiate the Phase 2 portion of the study before year-end. The Company is evaluating Phase 2 expansion cohorts in high-prevalence c-MYC-driven tumors, including hormone receptor-positive breast cancer and prostate cancer, as well as tumor types and patient populations driven by L- and N-MYC including non-small cell lung cancer (NSCLC), small cell lung cancer (SCLC), and solid tumors with amplifications of L- and N-MYC.
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Initiate a Phase 1 SAD/MAD study with MRT-6160 in healthy volunteers in mid-2024; report results from the Phase 1 study in Q1 2025. Monte Rosa expects to subsequently initiate proof-of-concept (POC) studies in autoimmune/inflammatory diseases, including ulcerative colitis and rheumatoid arthritis, with additional potential POC studies in dermatology, rheumatology, and neurology indications.
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Submit an IND application for MRT-8102 in H1 2025.
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Nominate a development candidate for the CDK2 preclinical program in 2024.

SECOND QUARTER 2024 FINANCIAL RESULTS

Collaboration Revenue: Collaboration revenue for the second quarter of 2024 was $4.7 million, compared with $0 during the same period in 2023. Collaboration revenue represents revenue recorded under the Roche License and Collaboration agreement.

Research and Development (R&D) Expenses: R&D expenses for the second quarter of 2024 were $28.1 million, compared to $29.1 million during the same period in 2023. R&D expenses were driven by the successful achievement of key milestones in our R&D organization, including the continuation of the MRT-2359 clinical study, the progression and growth of our preclinical pipeline, the preparation of MRT-6160 to enter the clinic, and the continued development of the Company’s QuEEN discovery engine. Non-cash stock-based compensation constituted $2.6 million of R&D expenses for Q2 2024, compared to $2.3 million in the same period in 2023.

General and Administrative (G&A) Expenses: G&A expenses for the second quarter of 2024 were $9.3 million compared to $8.1 million during the same period in 2023. The increase in G&A expenses resulted from increased headcount, stock-based compensation expense, and fees paid to consultants to support growth and operations. G&A expenses included non-cash stock-based compensation of $1.9 million for the second quarter of 2024, compared to $1.9 million for the same period in 2023.

Net Loss: Net loss for the second quarter of 2024 was $30.3 million, compared to $32.0 million for the first quarter of 2024.

Cash Position and Financial Guidance: Cash, cash equivalents, restricted cash, and marketable securities as of June 30, 2024, were $267.1 million, compared to cash, cash equivalents, restricted cash, and marketable securities of $197.8 million as of March 31, 2024.

The Company expects its cash and cash equivalents to be sufficient to fund planned operations and capital expenditures into the first half of 2027.

About MRT-2359

MRT-2359 is a potent, highly selective, and orally bioavailable investigational molecular glue degrader (MGD) that induces the interaction between the E3 ubiquitin ligase component cereblon and the translation termination factor GSPT1, leading to the targeted degradation of GSPT1 protein. The MYC transcription factors (c‑MYC, L-MYC and N-MYC) are well-established drivers of human cancers that maintain high levels of protein translation, which is critical for uncontrolled cell proliferation and tumor growth. Preclinical studies have shown this addiction to MYC-induced protein translation creates a dependency on GSPT1. By inducing degradation of GSPT1, MRT-2359 is designed to exploit this vulnerability, disrupting the protein synthesis machinery, leading to anti-tumor activity in MYC-driven tumors.

About MRT-6160

MRT-6160 is a potent, highly selective, and orally bioavailable investigational molecular glue degrader of VAV1, which in preclinical studies has shown deep degradation of its target with no detectable effects on other proteins. VAV1, a Rho-family guanine nucleotide exchange factor, is a key signaling protein downstream of both the T- and B-cell receptors. VAV1 expression is restricted to blood and immune cells, including T and B cells. Preclinical studies have shown that targeted degradation of VAV1 protein via an MGD modulates both T- and B-cell receptor-mediated activity. This modulation is evident both in vitro and in vivo, demonstrated by a significant decrease in cytokine secretion, proteins vital for maintaining autoimmune diseases. Moreover, VAV1-directed MGDs have shown promising activity in preclinical models of autoimmune diseases and thus have the potential to provide therapeutic benefits in multiple systemic and neurological autoimmune indications, such as inflammatory bowel disease, rheumatoid arthritis, multiple sclerosis, and dermatological disorders. Preclinical studies have demonstrated that MRT-6160 can inhibit disease progression in several in vivo autoimmunity models.

About MRT-8102

MRT-8102 is a potent, highly selective, and orally bioavailable investigational molecular glue degrader (MGD) that targets NEK7 for the treatment of inflammatory diseases driven by IL-1β and the NLRP3 inflammasome. NEK7 has been shown to be required for NLRP3 inflammasome assembly, activation and IL-1β release both in vitro and in vivo. Aberrant NLRP3 inflammasome activation and the subsequent release of active IL-1β and interleukin-18 (IL-18) has been implicated in multiple inflammatory disorders, including gout, cardiovascular disease, neurologic disorders including Parkinson’s disease and Alzheimer’s disease, ocular disease, diabetes, obesity, and liver disease. In a non-human primate model, MRT-8102 was shown to potently, selectively, and durably degrade NEK7, and resulted in near-complete reductions of IL-1β models following ex vivo stimulation of whole blood. MRT-8102 has shown a favorable profile in non-GLP toxicology studies.