Trajectory timelines and treatment efficacy of 177Lu-PSMA-617 radioligand therapy for metastatic castration-resistant prostate cancer

Real-world data from 50 consecutive cases treated in a single Canadian center

Auteurs-es

  • Frédéric Pouliot 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Michele Lodde 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Marjorie Besançon CHUQc-UL
  • Vincent Castonguay 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Antoine Morin-Coulombe 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Vincent Fradet 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Yves Fradet 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Louis Lacombe 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Éric Lévesque 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Nicolas Marcoux 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Paul Toren 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Geneviève April 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Frédéric Arsenault 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Alexis Beaulieu 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Narcisse Singbo 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Céline Veilleux
  • Mélanie Tremblay-Boily
  • Vincent Tremblay
  • François-Alexandre Buteau 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada
  • Jean-Mathieu Beauregard 1. Centre hospitalier universitaire de Québec-Université Laval, Québec City, Québec, Canada

DOI :

https://doi.org/10.5489/cuaj.9398

Mots-clés :

mCRPC, radiopharmaceutical therapy, 177Lu-PSMA-617

Résumé

Introduction: We aimed to evaluate the efficacy and safety of lutetium-177-PSMA-617 in patients with metastatic castration-resistant prostate cancer (mCRPC) following approval in the real-world Canadian clinical context.

Methods: Data on the first 50 patients with mCRPC who were treated with lutetium-177-PSMA-617 at a single center in Quebec, Canada, were retrospectively analyzed. Patients were treated with 7.4 GBq of lutetium-177-PSMA-617 administered every six weeks for up to six cycles.

Results: Median (95% confidence interval [CI]) patient age and pre-radioligand therapy prostate-specific antigen levels were 72.55 (65.92–76.77) years and 49.19 (15.61–180.65) ng/mL, respectively. Median (95% CI) time between oncologist referral for radioligand therapy and nuclear medicine consultation or first dose of lutetium-177-PSMA-617 were 12 (7.0–32.0) and 42 (28.0–54.0) days, respectively. Overall, 26.0% of patients completed six radioligand therapy cycles. Declines in prostate-specific antigen levels of 25%, 50%, and 90% were reached in 57%, 51%, and 17% of patients, after a median of two, two, and three cycles, respectively. At last followup, after a mean followup time of 8.5 months, 61% (25/41) of patients not on ongoing therapy were alive, with an estimated median overall survival of 13.0 months (95% CI 8.0–not reached).

Conclusions: Real-world data show that use of lutetium-177-PSMA-617 in patients with mCRPC is feasible in a universal healthcare system, with comparable oncologic activity to that observed in the phase 3 VISION trial. The study is limited by the short followup and its retrospective nature.

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Publié-e

2026-02-13

Comment citer

Pouliot, F., Lodde, M., Besançon, M., Castonguay, V., Morin-Coulombe, A., Fradet, V., … Beauregard, J.-M. (2026). Trajectory timelines and treatment efficacy of 177Lu-PSMA-617 radioligand therapy for metastatic castration-resistant prostate cancer: Real-world data from 50 consecutive cases treated in a single Canadian center. Canadian Urological Association Journal, 20(6). https://doi.org/10.5489/cuaj.9398

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Original Research