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Study details
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64Cu-GRIP B in Patients With Advanced Malignancies

Rahul Aggarwal
NCT IDNCT05888532ClinicalTrials.gov data as of Apr 2026
Phase

Phase 1/2

Target enrollment

91

Study length

about 3.7 years

Ages

18+

Locations

1 site in CA

About this study

This trial is testing if using a radiotracer targeting granzyme B, 64-copper granzyme targeting restricted interaction peptide specific to family member B (64 Cu-GRIP B) with positron emission tomography (PET) imaging can be safe and useful for detecting granzyme B (GrB) in patients with advanced cancers that has spread to nearby tissue or lymph nodes (advanced). Granzyme B (GrB) is a biomarker produced by immune cells in response to immunotherapy, which may highlight tumors that are more likely to respond to treatment. It population is focused on genitourinary (GU) malignancies, including renal cell and urothelial cancer, two tumor types with high mutational burden and tumor infiltrating lymphocytes compared to other tumor types, and have a predictable response rate at the population level to immune checkpoint inhibitors. The information gained from this trial may allow researchers to develop future trials where 64Cu-GRIP B PET may serve as a biomarker to monitor early response to immunomodulatory therapies which are used to stimulate or suppress the immune system and may help the body fight cancer.

Based on ClinicalTrials.gov records.

What participants do

  • 1.Take Copper-64 labeled Granzyme B (64Cu-GRIP B)
  • 2.Undergo Positron Emission Tomography (PET)
PhasePhase 1/Phase 2
DrugCopper-64 labeled Granzyme B (64Cu-GRIP B)
Primary goalAUC extrapolated to infinity (Cohort A)

Participation effort

Estimated from trial records. Details can vary by site.

Time + visits
Low12%
Logistics
Moderate50%

Logistics difficulty varies by site location and availability.

Trial highlights

Treatment details

Auto-extracted from trial records to preview treatments and outcomes.

Drug classes

Dermatological Agents

Endpoints

Primary: AUC extrapolated to infinity (Cohort A), Apparent terminal elimination half-life (Cohort A), Area under the concentration-time curve (AUC) (Cohort A), Frequency of treatment-emergent adverse events (Cohort A), Maximum observed concentration (Cmax) (Cohort A), Median clearance (Cohort A), Time to maximum observed concentration (Tmax) (Cohort A)

Secondary: Association of baseline uptake with object response (ORR) (Cohorts B, C and D), Association of baseline uptake with progression-free survival (PFS) (Cohorts B, C and D), Association of baseline uptake with reported immune-related adverse events (irAEs)(Cohorts B, C and D), Frequency of treatment-emergent adverse events (Cohorts B, C, and D), Median change in SUVmax from baseline with reported immune-related adverse event (Cohort B), Median change in SUVmax-ave from baseline with reported immune-related adverse event (Cohorts B)

Procedures

imaging

Body systems

Oncology