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Clinical Trial Summary

The current study aims at evaluating the diagnostic performance of [18F]CTT1057 as a PET imaging agent for detection and localization of PSMA positivity in patients diagnosed of biochemical recurrence of prostate cancer (PCa), using a composite truth standard. Approximately 190 participants will be enrolled to ensure at least 152 participants are evaluable (i.e. have both an evaluable [18F]CTT1057 PET/CT scan imaging, and at least one evaluable CTS assessment and have not received any prohibited systemic antineoplastic therapy before the completion of PET/CTs and CTS procedures), which will be required for the calculation of the co-primary endpoints.

Clinical Trial Description

This is a prospective, open-label, multi center, single-arm Phase III study to evaluate the diagnostic performance of [18F]CTT1057 as a PET imaging agent for detection and localization of PSMA positive tumors in PCa patients diagnosed with biochemical recurrence (BCR) after initial definitive therapy with either radical prostatectomy (RP) or curative intent radiation therapy (RT), using a CTS as reference. The CTS to be used as reference will be hierarchical in nature, with 3 levels of Standard of Truth (SoT) procedures, that will be applied as follows: CTS Level 1: Histopathology if available for the lesion (from prospective biopsy or salvage surgery performed within 8 weeks after the [18F]CTT1057 PET/CT scan); OR in case that histopathology is not available for a lesion, inconclusive or negative (for biopsy only): CTS Level 2: Imaging diagnostic procedures performed on each patient as clinically indicated per SoC, which must include at least a high resolution CT scan with contrast and a [68Ga]Ga-PSMA-11 PET/CT) performed within 8 weeks (either before or after) the [18F]CTT1057 PET/CT scan. Three-month follow-up imaging (from baseline) will also be used as part of the CTS level 2 in cases where it is clinically required for the diagnosis of particular lesion(s); OR if neither of the two above are feasible or deemed appropriate or they are inconclusive: CTS Level 3: 50% or greater decline in PSA following radiation therapy (as long as no concomitant androgen deprivation therapy (ADT) is given) as per Prostate Cancer Working Group 3 (PCWG3) criteria. All participants will undergo 2 PET/CT scans: one with the investigational agent [18F]CTT1057 and another with [68Ga]Ga-PSMA-11 (as a component of the CTS Level 2 and for a secondary endpoint of assessment of concordance between the 2 PET/CT scans for detection of lesions). The 2 PET imaging procedures will be performed at least 14 days apart, and the PET/CT scan sequence for each participant will be assigned at random in a 1:1 ratio. ;

Study Design

Related Conditions & MeSH terms

NCT number NCT04838613
Study type Interventional
Source Novartis
Contact Novartis Pharmaceuticals
Phone 1-888-669-6682
Email [email protected]
Status Recruiting
Phase Phase 3
Start date September 30, 2021
Completion date December 13, 2023

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