Merus Zeno BLA Gets 3 Month Review Extension

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FDA has extended by three months its priority review of a Merus BLA for Zeno (zenocutuzumab) for treating patients with neuregulin 1 fusion (NRG1+) non-small cell lung (NSCLC) and NRG1+ pancreatic (PDAC) cancer. The extension will give FDA additional time to review information recently submitted in response to a chemistry, manufacturing and controls information request, the company says, adding that no additional clinical data have been requested. The revised user fee review action target date is now 2/4/2025.

The NDA is based on data from the Phase 1/2 eNRGy trial (NCT02912949) that is assessing the antitumor activity and safety of zenocutuzumab in patients with various NRG1 fusion–positive solid tumors, including those with NSCLC or PDAC. The company earlier reported that treatment with zenocutuzumab showed an objective response rate of 34%, with target lesion reductions reported in 78% of patients. Additionally, the median duration of response was 12.9 months, with ongoing responses highlighted in 50% of patients at the time of the analysis.

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