Actinium Pharmaceuticals Highlights Phase 1 Prostate Cancer Trial of ATNM-400 at ESMO 2026

PUBT · 2d ago
Actinium Pharmaceuticals Highlights Phase 1 Prostate Cancer Trial of ATNM-400 at ESMO 2026
  • Actinium Pharmaceuticals will present its first-in-human Phase 1 ATNM-400 study at ESMO in Madrid, Oct. 23-27, 2026.
  • The trial evaluates the HER3-targeted radiotherapy in metastatic castration-resistant prostate cancer, including patients with or without prior PSMA-directed treatment.
  • Initial imaging results already presented at EANM showed tumor retention, with encouraging tolerability.
  • The study will assess safety to establish a recommended Phase 2 dose, with additional evaluation of antitumor activity.
  • The prostate cancer trial is the first clinical step in a strategy to expand ATNM-400 into additional solid tumors.


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