The purpose of this study was to evaluate the efficacy and safety of a novel theranostic agent, 177Lu-DKFZ-PSMA-617 therapy in metastatic castration resistant prostate cancer (mCRPC).
Thirty-one mCRPC patients with progressive disease despite second-line hormonal therapy and/or docetaxel chemotherapy were recruited for the study. All patients underwent diagnostic68Ga-PSMA-HBED-CCPET/CT, prior to inclusion for therapy. Included patients then underwent quarterly 177Lu-DKFZ-PSMA-617 therapy. Hematological, kidney function, liver function tests, and serum PSA levels were recorded before and after therapy at 2 weeks, 4 weeks, and 3 month intervals. Biochemical response was assessed with trend in serum PSA levels. Metabolic response was assessed by PERCIST 1 criteria. Clinical response was assessed by visual analogue score (VASmax) analgesic score (AS), Karanofsky performance status (KPS), and ttoxicity and response criteria of the Eastern Cooperative Oncology Group (ECOG) criteria.
The mean age of patients was 65.93 ± 9.77 years (range: 38–81 years). The mean activity administered in the 31 patients was 5069 ± 1845 MBq ranging from one to four cycles. There was a decline in the mean serum PSA levels from the baseline (baseline: 275 ng/mL, post 1st cycle therapy: 141.75 ng/mL). Based on biochemical response criteria 2/31, 20/31, 3/31, and 6/31 had complete response (CR), partial response(PR), stable disease (SD), and progressive disease (PD), respectively. Metabolic response revealed 2/6 patients with CR, and the remaining 3/6 patients with PR and 1/6 patients with SD. The mean VASmax score decreased from 7.5 to 3. The mean analgesic score decreased from 2.5 to 1.8 after therapy. The mean KPS score improved from 50.32 to 65.42 after therapies. The mean ECOG performance status improved from 2.54 to 1.78 after therapy. Two patients experienced grade I and grade II hemoglobin toxicity each. None of the patients experienced nephrotoxicity or hepatotoxicity.
177Lu-DKFZ-PSMA-617 radionuclide therapy is a safe and effective approach in the treatment of mCRPC patients.
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We are grateful to Ingo Klette, Radiochemist, Zentralklinik Bad Berka GmbH, Germany for his support in the research work.
Conflict of interest
The authors declare that they have no conflict of interest.
Ethical clearance received Ref. No IESC/T-229/05.05.2015, RT-46/2015
Informed consent obtained from all patients
No funding was received from any organisation for this study.
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Yadav, M.P., Ballal, S., Tripathi, M. et al. 177Lu-DKFZ-PSMA-617 therapy in metastatic castration resistant prostate cancer: safety, efficacy, and quality of life assessment. Eur J Nucl Med Mol Imaging 44, 81–91 (2017). https://doi.org/10.1007/s00259-016-3481-7
- 177Lu-DKFZ-PSMA-617 radionuclide therapy
- Quality of life