Clinical Outcomes of [177Lu]Lu-PSMA Therapy in mCRPC: PSA Response as a Prognostic Marker and Considerations for Individualized Treatment
摘要
This study aimed to evaluate the real-world effectiveness, survival outcomes, and safety profile of [177Lu]Lu-PSMA radioligand therapy (PSMA RLT) in an Asian cohort of patients with metastatic castration-resistant prostate cancer (mCRPC).
MethodsThis retrospective patient-based cohort study included 14 patients with mCRPC who underwent [177Lu]Lu-PSMA RLT between November 2020 and February 2025. Biochemical response was defined as a ≥ 50% PSA decline. Overall survival (OS) was estimated using Kaplan–Meier analysis. Statistical analyses were performed using SPSS version 23.0, with p < 0.05 considered statistically significant. Adverse events were graded according to CTCAE v5.0.
ResultsFourteen patients (median age: 65 years) with a median of 4 prior therapy lines (range: 3–5) and a median follow-up of 14 months (range: 5–52) received 2–9 treatment cycles (median: 4), for a total of 63 cycles. The median administered activity was 7,400 MBq per cycle (range: 2,035–7,400 MBq), with a median cumulative administered activity of 27,935 MBq. PSA declines > 30%, ≥ 50%, and ≥ 80% occurred in 57.1%, 50.0%, and 42.9% of patients, respectively. Median OS was significantly longer in PSA responders than non-responders (15.0 vs. 9.0 months; p = 0.037). Hematologic toxicities were predominantly grade 1–2, with one case of grade 4 thrombocytopenia.
Conclusion[¹⁷⁷Lu]Lu-PSMA RLT demonstrated encouraging efficacy and tolerability in this real-world Asian mCRPC cohort. A ≥ 50% PSA decline was associated with improved OS. Favorable responses observed in selected patients receiving lower administered activities should be interpreted cautiously and considered hypothesis-generating, requiring validation in prospective studies.