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Chua WM, Lam WWC, Tong AKT, Sultana R, Kua SMY, Kanesvaran R, Wong ASC, Tay KJ, Cheng TJL, Ng DCE, Thang SP. Outcomes and prognostic predictors of Lu-177 PSMA radioligand therapy in metastatic castration-resistant prostate cancer (Asian Population Study). Asia Pac J Clin Oncol 2023. [PMID: 36999335 DOI: 10.1111/ajco.13944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 01/17/2023] [Accepted: 01/23/2023] [Indexed: 04/01/2023]
Abstract
AIM Lutetium-177 (Lu-177) prostate-specific membrane antigen radioligand therapy (PSMA-RLT) is a promising therapy for metastatic castration-resistant prostate cancer (mCRPC), but there is limited data of its efficacy and safety in Asian population. We aim to explore the clinical outcomes of Lu-177 PSMA-RLT in this population. METHODS We evaluated 84 patients with progressive mCRPC receiving Lu-177 PSMA-RLT between 9 May 2018 and 21 February 2022. Lu-177-PSMA-I&T was administered at 6-8-week intervals. Primary end point was overall survival (OS), and secondary end points included prostate-specific antigen (PSA) progression-free survival (PFS), PSA response rate, clinical response, toxicity assessment, and prognostic indicators. RESULTS The median OS and PSA PFS were 12.2 and 5.2 months, respectively. PSA decline of ≥50% was observed in 51.8% of patients. Patients achieving PSA response had longer median OS (15.0 vs. 9.5 months, p = .03) and PSA PFS (6.5 vs. 2.9 months, p < .001). Pain score improvement was seen in 19 out of 34 patients. A hematotoxicity of ≥grade 3 was observed in 13 out of 78 patients. Multivariable analyses showed that PSA velocity, alkaline phosphatase, hemoglobin (Hb), and the number of treatment cycles were independent prognostic indicators for OS. The retrospective design was the main limitation of the study. CONCLUSIONS Our study demonstrated a similar safety and efficacy of Lu-177 PSMA-RLT in Asian mCRPC patients compared to the existing literature. A PSA decline ≥50% was associated with longer OS and PSA PFS. Several prognostic indicators for patient outcomes were also identified.
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Affiliation(s)
- Wei Ming Chua
- Division of Radiological Sciences, Department of Nuclear Medicine and Molecular Imaging, Singapore General Hospital, Singapore, Singapore
| | - Winnie Wing-Chuen Lam
- Division of Radiological Sciences, Department of Nuclear Medicine and Molecular Imaging, Singapore General Hospital, Singapore, Singapore
- Radiological Sciences Academic Clinical Program, SingHealth Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Aaron Kian-Ti Tong
- Division of Radiological Sciences, Department of Nuclear Medicine and Molecular Imaging, Singapore General Hospital, Singapore, Singapore
- Radiological Sciences Academic Clinical Program, SingHealth Duke-NUS Academic Medical Centre, Singapore, Singapore
| | | | - Sandra Mei Yu Kua
- Division of Radiological Sciences, Department of Nuclear Medicine and Molecular Imaging, Singapore General Hospital, Singapore, Singapore
| | - Ravindran Kanesvaran
- Duke-NUS Graduate Medical School, Singapore, Singapore
- Department of Medical Oncology, National Cancer Centre, Singapore, Singapore
| | - Alvin Seng Cheong Wong
- Department of Hematology-Oncology, National University Cancer Institute, Singapore, Singapore
| | - Kae Jack Tay
- Duke-NUS Graduate Medical School, Singapore, Singapore
- Department of Urology, Singapore General Hospital, Singapore, Singapore
| | - Tai Jit Lenith Cheng
- Department of Diagnostic Imaging, National University Hospital, Singapore, Singapore
| | - David Chee Eng Ng
- Division of Radiological Sciences, Department of Nuclear Medicine and Molecular Imaging, Singapore General Hospital, Singapore, Singapore
- Radiological Sciences Academic Clinical Program, SingHealth Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Sue Ping Thang
- Division of Radiological Sciences, Department of Nuclear Medicine and Molecular Imaging, Singapore General Hospital, Singapore, Singapore
- Radiological Sciences Academic Clinical Program, SingHealth Duke-NUS Academic Medical Centre, Singapore, Singapore
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Cheng TJL, Thian YL, Sia SY, Hallinan JTPD. Clinics in diagnostic imaging (187). Singapore Med J 2018; 59:339-344. [DOI: 10.11622/smedj.2018071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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