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GSK's Mo-Rez Shows 62% Tumor Reduction in Trials

4/12/2026

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Story summary
  • GlaxoSmithKline plc (GSK) reported that Mocertatug Rezetecan (Mo-Rez) reduced or eliminated tumors in 62% of ovarian cancer patients and 67% of endometrial cancer patients in early trials.
  • GSK will move Mo-Rez to late-stage, global trials, including in the United Kingdom.
  • The company aims for Mo-Rez to become a blockbuster and help reach a £40 billion sales target by 2031.