Men with high-risk prostate cancer undergoing surgery likely recur due to failure to completely excise regional and/or local disease.
The first-in-human evaluation of safety, pharmacokinetics, and exploratory efficacy of IS-002, a novel near-infrared prostate-specific membrane antigen (PSMA)-targeted fluorescence imaging agent, designed for intraoperative prostate cancer visualization.
A phase 1, single-center, dose-escalation study was conducted in 24 men with high-risk prostate cancer scheduled for robotic-assisted radical prostatectomy with (extended) pelvic lymph node dissection using the da Vinci surgical system.
Adverse events (AEs), vital signs, complete blood count, complete metabolic panel, urinalysis, and electrocardiogram were assessed over a 14-d period and compared with baseline. The pharmacokinetic profile of IS-002 was determined. Diagnostic accuracy was assessed for exploratory efficacy.
AEs predominantly included discoloration of urine (n = 22/24; expected, related, grade 1). There were no grade ≥2 AEs. IS-002 Cmax and area under the curve increased with increasing dose. Plasma concentrations declined rapidly in a biphasic manner, with the median terminal half-lives ranging from 5.0 to 7.6 h, independent of dose and renal function. At 25 μg/kg, the exploratory efficacy readouts for the negative and positive predictive values were, 97% and 45% for lymph nodes, and 100% and 80% for residual/locoregional disease detection, respectively.
IS-002 is safe and well tolerated, and has the potential to enable intraoperative tumor detection that could not be identified using standard imaging.
IS-002 is a new imaging agent that specifically targets the prostate-specific membrane antigen receptor. In this study, we tested IS-002 for the first time in men with high-risk prostate cancer undergoing surgery and found that IS-002 is safe, is cleared from the body quickly, and potentially allows identification of prostate cancer in areas that would not be identified by conventional white light imaging.
European urology oncology. 2023 Jul 27 [Epub ahead of print]
Hao G Nguyen, Nynke S van den Berg, Alexander L Antaris, Lingru Xue, Scott Greenberg, J Walker Rosenthal, Anna Muchnik, Alwin Klaassen, Jeffry P Simko, Sanjeev Dutta, Jonathan M Sorger, Pamela Munster, Peter R Carroll
Department of Urology, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA., Intuitive Surgical, Sunnyvale, CA, USA., Department of Pathology, University of California, San Francisco, CA, USA., Department of Medicine, Phase 1 Clinic, University of California, San Francisco, CA, USA., Department of Urology, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA. Electronic address: .