A Phase 1, Open-label, Dose-Ascending Study to Evaluate the Safety and Tolerability of the Therapeutic Radiopharmaceutical 131I-MIP-1095 for the Treatment of Metastatic Castration-Resistant Prostate Cancer.
Clin Nucl Med
; 48(11): 937-944, 2023 Nov 01.
Article
em En
| MEDLINE
| ID: mdl-37812518
ABSTRACT
PURPOSE:
131I-MIP-1095 is a targeted radiotherapeutic that contains 131I, a ß-particle emitter, and MIP-1095, a urea-based ligand for prostate-specific membrane antigen. We report the first phase 1, dose-escalation study of 131I-MIP-1095 in patients with metastatic castration-resistant prostate cancer (mCRPC).METHODS:
This study enrolled men with mCRPC refractory to second-generation antiandrogen(s) and taxane chemotherapy. Dosimetry/biodistribution assessments were performed. Safety and tolerability were determined in subjects who qualified for therapeutic administration of 131I-MIP-1095 with maximum tolerated activity examined in a dose-ascending manner (3 + 3 design methodology). Disease outcomes including prostate-specific antigen (PSA) change, tumor response, survival, and circulating tumor cell concentration were assessed.RESULTS:
A total of 9 subjects with mCRPC were included in this study. On the basis of dosimetry results, 5 of 9 patients were treated 3 in cohort 1 (50 mCi) and 2 in cohort 2 (75 mCi). Accrual stopped at the cohort 2 activity level in response to the US Food and Drug Administration mandate for 131I-MIP-1095 manufacturing concerns. Parotid/salivary glands (3.5 Gy/Bq), liver (2.2 Gy/Bq), kidneys (1.3 Gy/Bq), and spleen (0.7 Gy/Bq) demonstrated the greatest extent of 131I-MIP-1095 exposure. There were no deaths, serious adverse events, or drug discontinuations due to treatment-emergent adverse events. Grade 1-2 thrombocytopenia, anemia, leukopenia, and dry mouth most commonly occurred. One subject (33.3%) exhibited maximum decline for the PSA response of 50% or greater.CONCLUSION:
131I-MIP-1095 demonstrated favorable dosimetry, biodistribution, and safety, as well as a modest PSA response supporting further investigation for treatment of men with mCRPC.Clinical Trial Registration ClinicalTrials.gov identifier NCT03030885, Registered January 25, 2017 (https//clinicaltrials.gov/ct2/show/NCT03030885).
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Neoplasias de Próstata Resistentes à Castração
/
Antineoplásicos
Limite:
Humans
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Male
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article