Evaluation of 18F-DCFBC PSMA-based PET Imaging for Detection of Metastatic Prostate Cancer

Study Overview
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Brief Summary
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This research is being done to see if an investigational radioactive drug called 18F-DCFBC can help us find cancer that has spread (metastatic disease) from its original site in people who have cancer in their prostate to other parts of their body.

Detailed Description
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The objective of this study is to evaluate a radiolabeled urea-based small molecule inhibitor of prostate-specific membrane antigen (PSMA), [18F]DCFBC (DCFBC) PET imaging for detection of metastatic prostate cancer. PSMA is a well characterized histological marker of prostate cancer tumor aggressiveness and metastatic potential. The investigators propose to assess the ability of DCFBC PET to detect metastatic prostate cancer by visual qualitative and quantitative SUV analysis. Correlation will be made to sites of suspected metastatic disease detected by standard conventional imaging modalities (CIM) for prostate cancer which includes IV contrast CT of chest/abdomen/pelvis and whole body bone scintigraphy.

Official Title
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Evaluation of 18F-DCFBC PSMA-based PET Imaging for Detection of Metastatic Prostate Cancer.

Conditions
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Metastatic Prostate Cancer

Intervention / Treatment
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* Drug: 18F-DCFBC


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Histological confirmation of prostate cancer Radiologic evidence of new or progressive metastatic disease demonstrated on anatomical imaging (CT, MRI, or ultrasound), bone scintigraphy, [18F]Sodium Fluoride PET, and/or [18F]FDG PET Rising PSA on two observations taken at least 1 week apart Adequate peripheral venous access or available central venous catheter access for radiopharmaceutical administration Patient can remain on androgen deprivation therapy if on the same regimen prior to documentation of progressive metastatic disease Patient cannot start a new therapy for prostate cancer prior to study radiopharmaceutical imaging Patient is judged by the Investigator to have the initiative and means to be compliant with the protocol and be within geographical proximity to make the required study visits Patients or their legal representatives must have the ability to read, understand and provide written informed consent for the initiation of any study related procedures Exclusion Criteria: Patient has been treated with an investigational drug, investigational biologic, or investigational therapeutic device within 14 days prior to study radiotracer administration Prior radiation therapy, chemotherapy, or androgen-deprivation therapy within 2 weeks prior to study radiotracer administration (Washout is one half-life of the drug or 2 weeks, whichever is longest) Initiation of new therapy for progressive metastatic disease since radiographic documentation of progression. Serum creatinine > 3 times the upper limit of normal Total bilirubin > 3 times the upper limit of normal Liver Transaminases > 5times the upper limit of normal Unable to lie flat during or tolerate PET/CT Prior history of any other malignancy within the last 2 years, other than skin basal cell or cutaneous superficial squamous cell carcinoma that has not metastasized and superficial bladder cancer.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 100 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: 18F-DCFBC<br>Participants with hormone-naive prostate cancer (HNPC) and castration-resistant prostate cancer (CRPC) with metastatic lesions detected on conventional imaging modalities (contrast-enhanced computed tomography [CECT] and bone scintigraphy [BS]) undergo PET imaging with 18F-DCFBC radiotracer. | Drug: 18F-DCFBC<br>* 18F-DCFBC is a radiofluorinated small-molecule inhibitor of prostate-specific membrane antigen (PSMA). A bolus of 10 mCi (370 MBq) [9-11 mCi (333-407 MBq)] of 18F-DCFBC will be injected into the IV line by slow IV push.<br>* Other names: N-[N-[(S)-1,3-dicarboxypropyl]carbamoyl]-4-18F-fluorobenzyl-L-cysteine;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Measurement of Sensitivity of DCFBC-PET as Determined by Agreement of PET/CT Detection of Metastatic Prostate Cancer With Conventional Imaging Modality (CIM) | Measurement of sensitivity of DCFBC PET to CIM (contrast-enhanced CT and bone scintigraphy) for detection of metastatic prostate cancer based on number of lesions that are detected on PET/CT, in agreement with CT and CIM. Measurement of sensitivity were obtained on lesion by lesion analysis where lesions that responded on follow up were considered a true positive. | 24 Months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Sensitivity of Detection of New or Progression of Metastasis | Sensitivity of DCFBC-PET and conventional imaging modalities (CIM), which include bone scintigraphy (BS) and contrast-enhanced computed tomography (CECT) to detect new or progression of metastases at follow-up, where equivocal lesions are considered negative. Measurement of sensitivity were obtained on lesion by lesion analysis where lesions that responded on follow up were considered a true positive, therefore, sensitivity is a proportion of responsive lesions to the total number of lesions analyzed. | up to 1 year | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Metastatic Prostate Cancer