Comparison of 18F-rhPSMA-7.3 PET/CT With and Without Furosemide in Biochemical Recurrence of Prostate Cancer

Prostate Adenocarcinoma Clinical Trial

Official title:

Strategy to Reduce Bladder Activity With RhPSMA 7.3: Comparison of 18F-RhPSMA 7.3 PET/CT With and Without Furosemide in Biochemical Recurrence of Prostate Cancer

Clinical Trial Details — Status: Active, not recruiting

Administrative data

• NCT number: NCT05779943
• Other study ID #: STUDY00004720
• Secondary ID: RAD5689-22-BED-I
• Status: Active, not recruiting
• Phase: Phase 2
• Start date: April 27, 2023
• Est. completion date: July 1, 2028

Study information

• Verified date: March 2024
• Source: Emory University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This phase II trial evaluates Fluorine-18 radiohybrid prostate-specific membrane antigen (18F- rhPSMA)-7.3 positron emission tomography (PET)/computed tomography (CT) scans with and without furosemide for the reduction of bladder activity in patients with prostate cancer that has come back (recurrent) based on elevated levels of prostate-specific antigen (PSA) in the blood (biochemical) after prostate surgery (prostatectomy). Furosemide is a diuretic substance that increases the urine flow into the bladder, thereby decreasing the level of radioactivity within the bladder, which may help to see any abnormal areas that could be masked by the radioactivity within the bladder. PET is an established imaging technique that utilizes small amounts of radioactivity attached to very minimal amounts of tracer, in the case of this research, rhPSMA ligand. CT utilizes x-rays that traverse body from the outside. CT images provide an exact outline of organs and potential inflammatory tissue where it occurs in patient's body. Adding furosemide to 18F-rhPSMA 7.3 PET/CT scans may help to better detect and treat patients with biochemically recurrent prostate cancer.

Description:

PRIMARY OBJECTIVE:

I. To determine if administering 20 mg furosemide intravenously (IV) at the time of radiotracer injection significantly reduces bladder activity compared with the same patient scanned without furosemide as internal control.

SECONDARY OBJECTIVES:

I. To compare detection rates of recurrent disease in blinded interpretations between the furosemide and non-furosemide 18FrhPSMA-7.3 PET/CT scans, with patients serving as their own internal controls.

II. To compare reader confidence in identifying prostate bed and other recurrent lesions on a 18F-rhPSMA-7.3 PET/CT with furosemide compared with 18F-rhPSMA-7.3 PET/CT without furosemide.

OUTLINE:

Patients receive 18F-rhPSMA 7.3 tracer IV and then undergo PET-CT scans with and without furosemide IV on study.

Recruitment information / eligibility

• Status: Active, not recruiting
• Enrollment: 20
• Est. completion date: July 1, 2028
• Est. primary completion date: July 1, 2027
• Accepts healthy volunteers: No
• Gender: Male
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Adenocarcinoma of the prostate, post-prostatectomy

• Biochemical recurrence of prostate cancer following radical prostatectomy (RP) with or without adjuvant or salvage therapy: PSA >= 0.2 ng/mL followed by a subsequent confirmatory PSA value >= 0.2 ng/mL

• Age over 18

• Ability to provide written informed consent

• Patients with standard of care creatinine =< 1.3 mg/dL performed within 90 days prior to enrollment

Exclusion Criteria:

• Inability to undergo 18F-rhPSMA PET-CT, contraindications to furosemide or urinary incontinence

Related Conditions & MeSH terms

• Prostate Adenocarcinoma
• Recurrence
• Recurrent Prostate Carcinoma

Intervention

Drug:
• Furosemide
Given IV

Other:
• F18-rhPSMA-7.3
Given IV

Procedure:
• Positron Emission Tomography
Undergo PET/CT scan
• Computed Tomography
Undergo PET/CT scan

Locations

Country	Name	City	State
United States	Emory Saint Joseph's Hospital	Atlanta	Georgia
United States	Emory University Hospital Midtown	Atlanta	Georgia
United States	Emory University Hospital/Winship Cancer Institute	Atlanta	Georgia
United States	Emory Johns Creek Hospital	Johns Creek	Georgia

Sponsors (3)

Lead Sponsor	Collaborator
Emory University	Blue Earth Diagnostics, National Cancer Institute (NCI)

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Change in bladder activity as measured by bladder standardized uptake value (SUV) mean	Change in bladder SUV mean will be assessed using a paired t-test, or using a non-parametric equivalent such as a Wilcoxon signed rank test. Descriptively, change in bladder SUV mean will be reported for those administered 20 mg furosemide intravenously (IV) at the time of radiotracer injection first (group A), and those administered 20mg furosemide IV at the time of radiotracer injection second (group B).	Up to 2 weeks
Secondary	Change in bladder and renal activity	Change in bladder and renal activity will be assessed using paired t-tests, or using non-parametric equivalents such as a Wilcoxon signed rank tests. Descriptively, bladder and renal activity will be reported for those administered 20 mg furosemide IV at the time of radiotracer injection first (group A), and those administered 20 mg furosemide IV at the time of radiotracer injection second (group B).	Up to 2 weeks
Secondary	Recurrent disease rate	Defined as presence of unequivocal soft tissue radiotracer uptake that is characteristic of malignancy in the prostate bed and/or surrounding soft tissues and within pelvic lymph nodes. Recurrent disease rates will be compared (furosemide versus non-furosemide flotufolastat F-18 radiohybrid prostate-specific membrane antigen (18F-rhPSMA)-7.3 positron emission tomography (PET) scans using McNemar's tests. Rates will be reported, along with 95% exact confidence intervals using the Clopper-Pearson method. Descriptively, recurrent disease rate will be reported for those administered 20 mg furosemide IV at the time of radiotracer injection first (group A), and those administered 20 mg furosemide IV at the time of radiotracer injection second (group B).	Up to 2 weeks
Secondary	Reader confidence score	The readers' confidence in identifying prostate bed, pelvic and retroperitoneal nodal disease and other recurrence on 18F-rhPSMA-7.3 PET/computed tomography (CT) with furosemide compared with the 18F-rhPSMA-7.3 PET/CT without furosemide will be scored using a 5-point Likert scale. This analysis will be descriptive, with summary statistics reported with and without furosemide. Continuous variables will be summarized using mean, median, interquartile range, standard deviation, and min/max. Categorical variables will be summarized using frequencies and percentages. All tests will be two-sided with an alpha level of 0.05, unless otherwise noted. Statistical analysis will be conducted using SAS 9.4.	Up to 4 years