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Emiltatug Ledadotin - Mersana Therapeutics

Drug Profile

Emiltatug Ledadotin - Mersana Therapeutics

Alternative Names: B7-H4 ADC - Mersana Therapeutics; B7-H4 targeting antibody drug conjugate - Mersana Therapeutics; Emi-Le; XMT-1660

Latest Information Update: 26 Sep 2025

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At a glance

  • Originator Mersana Therapeutics
  • Class Antibodies; Antineoplastics; Auristatins; Drug conjugates; Immunoconjugates
  • Mechanism of Action Apoptosis stimulants; Mitosis inhibitors; Tubulin inhibitors; Tubulin polymerisation inhibitors
  • Orphan Drug Status

    Orphan designation is assigned by a regulatory body to encourage companies to develop drugs for rare diseases.

    No
  • New Molecular Entity Yes

Highest Development Phases

  • Phase I Adenoid cystic carcinoma; Endometrial cancer; Fallopian tube cancer; Ovarian cancer; Peritoneal cancer; Triple negative breast cancer

Most Recent Events

  • 26 Sep 2025 Phase I development for Endometrial cancer, Fallopian tube cancer, Ovarian cancer and Triple-negative-breast-cancer, in USA is still ongoing (IV) (NCT05377996)
  • 02 Jun 2025 Updated efficacy data from a phase I trial in Triple negative breast cancer released by Mersana Therapeutics
  • 10 Jan 2025 XMT 1660 receives Fast Track designation for Breast cancer (Late-stage disease, Metastatic disease, Second-line therapy or greater) in USA

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