31% confirmed ORR (8 responses in 26 evaluable patients) across B7-H4 high tumors at intermediate doses 44% confirmed ORR (7 responses in 16 evaluable patients) in the subset of patients with ≤4 prior lines of therapy CAMBRIDGE, Mass., June 02, 2025 (GLOBE NEWSWIRE) -- Mersana Therapeutics, Inc. (NASDAQ: MRSN), a clinical-stage biopharmaceutical company focused on the development of antibody-drug conjugates (ADCs) targeting cancers in areas of high unmet medical need, today announced additional interim Pha ...