On August 13, 2024 Mural Oncology plc (Nasdaq: MURA), a clinical-stage immuno-oncology company developing novel, investigational engineered cytokine therapies designed to address areas of unmet need for patients with a variety of cancers, reported financial results for the second quarter of 2024 and provided a business update (Press release, Mural Oncology, AUG 13, 2024, View Source [SID1234645815]).

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"We’ve seen resurgent interest across the industry in cytokines as powerful tools to fight cancer and Mural is in a unique position to deliver promising drug candidates that have the potential to overcome the limitations of prior approaches," said Caroline Loew, Ph.D., Chief Executive Officer of Mural Oncology. "Since becoming an independent company late last year, we’ve rapidly worked to shape and grow a nimble organization focused on delivering meaningful new immunotherapy treatments to cancer patients. We believe each of our programs is engineered with a differentiated approach that we hope will play out significantly in the clinic starting early next year."

Recent Corporate Highlights and Upcoming Milestones

Mural appointed George Golumbeski, Ph.D., to its board of directors in July. Dr. Golumbeski currently serves as a partner at DROIA Ventures, a specialist biotech investment firm focused on therapeutics for oncology and genetic disease. Prior to DROIA, he served as President and Head of Corporate Development for GRAIL and Executive Vice President of Business Development for Celgene. He has nearly 30 years of extensive experience with strategic collaborations, M&A, in-licensing, out-licensing, and alliance management.
Mural’s late-stage clinical trials of nemvaleukin alfa continue to progress toward readouts in the first half of 2025. The company is focused on two foundational indications for nemvaleukin, where the majority of patients do not have any currently approved therapies.

ARTISTRY-7 is a potentially registrational, phase 3 clinical trial evaluating nemvaleukin in combination with pembrolizumab compared to investigators’ choice of chemotherapy in patients with platinum-resistant ovarian cancer. Patient enrollment in this trial is now complete. Mural continues to expect to report interim overall survival (OS) results based on approximately 75% of events in the first quarter of 2025. The company anticipates reporting final OS results in the second quarter of 2026.
Mural expects to report top-line data results from cohort 2 of ARTISTRY-6 in the first half of 2025. This is a potentially registrational, phase 2 clinical trial evaluating nemvaleukin as a monotherapy in patients with mucosal melanoma.
Mural is also evaluating a less-frequent intravenous (LFIV) dose of nemvaleukin in patients with cutaneous melanoma in cohort 3 (monotherapy) and cohort 4 (combination therapy) in ARTISTRY-6. The company expects preliminary data readouts in the monotherapy cohort in the first half of 2025, and in the combination cohort with pembrolizumab in the second half of 2025.
In June, Mural presented data from ARTISTRY-3, an evaluation of the LFIV dosing of nemvaleukin, at the American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) annual meeting. This data from ARTISTRY-3 informed the LFIV dose currently being used in cohort 3 and cohort 4 of ARTISTY-6. In the ARTISTRY-3 trial, the company evaluated escalating LFIV infusions, all of which were generally well tolerated. The safety profile in all dosing schedules evaluated was consistent with nemvaleukin’s known mechanism of action, and no dose limiting toxicities were observed. Although administering higher doses per cycle than in previous trials evaluating nemvaleukin, no new safety signals were identified. The desired pharmacodynamic (PD) effects were also seen across all evaluated doses. Expansion of antitumor CD8+ T cells and natural killer (NK) cells was observed concurrent with minimal expansion of immunosuppressive regulatory T cells (Tregs).

Mural’s preclinical interleukin-18 (IL-18) and IL-12 programs remain on track, with nominations for both development candidates expected this year.

Mural’s enhanced IL-18 is engineered to deliver a more sustained immune response for cancer treatment. Native IL-18 is a potent immune-stimulating cytokine, but its efficacy is blunted by IL-18 binding protein (IL-18BP), a high affinity decoy receptor that binds with and neutralizes IL-18, thereby rendering it ineffective. Native IL-18 is also limited by its short half-life. Mural’s IL-18 variant contains mutations that eliminate binding to IL-18BP while minimally impacting the native IL-18 structure. The company has also fused IL-18 to protein scaffolds to extend the half-life and increase IL-18’s exposure. Together, Mural believes these have demonstrated a more durable immunological effect in preclinical studies.
The company’s enhanced IL-12 is engineered to leverage native IL-12’s anti-tumor potency while mitigating its hallmark toxicity. Native IL-12 is a highly potent pro-inflammatory cytokine, but because of its very narrow therapeutic index, it can also be incredibly toxic with systemic exposure. Mural’s IL-12 variant splits the molecule into two inactive monomers, and these individual subunits are then separately fused to antibody fragments and sequentially injected, which deliver and concentrate IL-12 specifically in the tumor microenvironment with the goal of limiting systemic exposure. In preclinical studies, Mural believes its engineered IL-12 achieved the desired reduction in serum while maintaining tumor concentrations providing the potential to reduce systemic toxicities.
Financial Results for the Quarter Ended June 30, 2024

Cash Position: As of June 30, 2024, cash, cash equivalents, and marketable securities were $204.7 million.
R&D Expenses: Research and development expenses were $27.5 million for the second quarter of 2024 compared to $42.5 million for the second quarter of 2023. The decrease in R&D expenses was primarily due to different team composition compared to the personnel allocated to us by Alkermes, our former parent, prior to the separation, as well as decreased spend on the ARTISTRY-1 and ARTISTRY-2 trials as activities related to these trials wound down in 2023 and decreased spend on the ARTISTRY-7 trial due to the timing of patient enrollment.
G&A Expenses: General and administrative expenses were $6.7 million for the second quarter of 2024 compared to $4.7 million for the second quarter of 2023. The increase in expenses was primarily due to costs associated with operating as a standalone company after the separation. This includes employee-related expenses and professional fees.
Net Loss: Net loss was $31.6 million for the second quarter of 2024 compared to $50.2 million for the second quarter of 2023.
Financial Guidance

The company reaffirms guidance that its cash, cash equivalents, and marketable securities are expected to fund its operations into the fourth quarter of 2025.
As noted previously, management forecasts lower operating expenses in 2025 versus 2024 due to the timing of clinical trial expenses.
About Nemvaleukin
Nemvaleukin alfa (nemvaleukin) is a novel, engineered cytokine designed to leverage antitumor effects of the IL-2 pathway while mitigating the hallmark toxicities that limit its use. Nemvaleukin selectively binds to the intermediate-affinity IL-2 receptor (IL-2R) and is sterically occluded from binding to the high-affinity IL-2R. Because of this molecular design, nemvaleukin treatment leads to preferential expansion of antitumor CD8+ T cells and natural killer cells, with minimal expansion of immunosuppressive regulatory T cells. Nemvaleukin is currently being evaluated in two potentially registrational late-stage trials.