Exhibit 2
Merus Announces Financial Results for the Second Quarter 2019 and Provides Business Update
UTRECHT, The Netherlands, August 19, 2019 (GLOBE NEWSWIRE) — Merus N.V. (Nasdaq: MRUS) (“Merus”, “we”, “our” or the “Company”), a clinical-stage immuno-oncology company developing Biclonics®, innovative full-length human bispecific antibody therapeutics, today announced financial results for the second quarter ended June 30, 2019 and provided a business update.
“We have made good progress with our clinical programs in the second quarter and have achieved further clarity with our clinical trial plans,” said Ton Logtenberg, Ph.D., President, Chief Executive Officer and Principal Financial Officer of Merus. “Patient enrollment for ourMCLA-158 andMCLA-145 Phase 1 trials is on track. Importantly, we amended theMCLA-117T-cell engager trial to allow us to explore higher doses, and were-focused ourMCLA-128 Phase 1/2 monotherapy trial on a subpopulation of patients with solid tumors harboring NRG1 gene fusions. We plan to report on our Phase 2MCLA-128 MBC trial in the fourth quarter. Additionally, our collaborator Ono Pharmaceutical announced the submission of an IND for a bispecific CD3 xPD-1 antibody for autoimmune diseases.”
Clinical Programs and Business Update:
MCLA-128 (HER3 x HER2 Biclonics®): Phase 2 metastatic breast cancer cohort update planned for 4Q 2019; Phase 1/2 single agent trial amended to focus on solid tumors harboring Neuregulin 1 (NRG1) gene fusions.
The Phase 2 clinical trial evaluatingMCLA-128 in combination treatments in two metastatic breast cancer (“MBC”) populations is ongoing. Merus will provide an update which will include data from both cohorts in the fourth quarter of 2019.
In August, Merus amended the single agent Phase 1/2 trial in solid tumors to focus solely on the exploration ofMCLA-128 in solid tumors harboring NRG1 fusions. The amended global study will evaluate the activity ofMCLA-128 in three cohorts, each aiming to treat patients harboring an NRG1 fusion: patients withnon-small cell lung cancer (NSCLC), patients with pancreatic cancer and patients with any other solid tumor (basket cohort). The current amendment follows on an effort in the ongoing Phase 1/2 study which sought to identify asub-population of patients with NSCLC harboring NRG1 fusions. More information will be provided by the end of 2019. Details of the trial can be found atClinicalTrials.gov.
The NRG1 gene encodes for neuregulin (also known as heregulin), the ligand to HER3. Fusions between NRG1and partner genes are rare, tumorigenic genomic events occurring in patients with certain lung and other cancers, associated with activation of HER2/HER3 heterodimers and growth of cancer cells. In preclinical studies, Merus has observed thatMCLA-128 is capable of potent inhibition of heregulin-driven HER2/HER3 heterodimer formation, resulting in blocking of tumor cell growth in models harboring NRG1 fusions.
MCLA-128 is an antibody-dependent cell-mediated cytotoxicity (“ADCC”) -enhanced Biclonics® that inhibits theheregulin/HER3 tumor-signaling pathway in solid tumors.MCLA-128 is believed to work with HER2-targeted therapies and to overcome the resistance of tumor cells using two mechanisms: blocking growth and survival pathways to stop tumor expansion and recruitment and enhancement of immune effector cells to eliminate the tumor.
MCLA-117 (CLEC12A x CD3 Biclonics®): Expect to present initial Phase 1 data at a medical conference 1H 2020.
Dose escalation for the Phase 1 clinical trial forMCLA-117 continues and preliminary anti-tumor activity has been observed. In July, Merus amended theMCLA-117 protocol to allow for the exploration of higher doses. The Phase 1 trial initiated at a low dose level based on the potent nature ofT-cell engagers. Due to this amendment and continued dose escalation, Merus now plans to present initial data at a medical conference in the first half of 2020.
MCLA-117 is a Biclonics® that binds with relative low affinity to CD3, a component of the T cell receptor present on all T cells, and relative high affinity to CLEC12A, a cell surface molecule present on acute myeloid leukemia (“AML”) tumor cells and AML stem cells.MCLA-117 has been shown in preclinical studies to recruit and activate T cells to kill CLEC12A-expressing malignant cells which may prevent recurrence of the tumor, while sparing hematopoietic stem cells.MCLA-117 has a full-length IgG format with a silenced constant region, which Merus believes may contribute to safety and attractive dosing schedules for patients.