Prospective Exploratory Study of FAPi PET/CT in Prostate Cancer With Histopathology Validation

NCT ID: NCT04457232

Last Updated: 2025-07-15

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ACTIVE_NOT_RECRUITING

Clinical Phase

PHASE1

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-09-09

Study Completion Date

2026-05-30

Brief Summary

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This exploratory study investigates how a new imaging technique called FAPI PET/CT can determine where and to which degree the FAPI tracer (68Ga-FAPi-46) accumulates in normal and cancer tissues in patients with prostate cancer. Because some cancers take up 68Ga-FAPi-46 it can be seen with PET. FAP stands for Fibroblast Activation Protein. FAP is produced by cells that surround tumors. The function of FAP is not well understood but imaging studies have shown that FAP can be detected with FAPI PET/CT. Imaging FAP with FAPI PET/CT may in the future provide additional information about various cancers including prostate cancer.

Detailed Description

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PRIMARY OBJECTIVE:

I. To define the biodistribution of gallium 68Ga-FAPi-46 in normal and cancer tissues of patients with prostate cancer.

SECONDARY OBJECTIVES:

I. To evaluate whether 68Ga-FAPi-46 and gallium Ga 68-labeled PSMA-11 (68Ga-PSMA-11) accumulation observed by positron emission tomography (PET) correlates with the amount of fibroblast activation protein (FAP) and prostate specific membrane antigen (PSMA) in excised cancer tissue, respectively.

II. To assess the 68Ga-FAPI-46 biodistribution correlation with 68Ga-PSMA-11.

OUTLINE:

Patients receive 68Ga-FAPi-46 intravenously (IV) and undergo PET/computed tomography (CT) imaging over 20-50 minutes.

Conditions

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Metastatic Malignant Neoplasm in the Prostate Gland Prostate Carcinoma Recurrent Prostate Carcinoma

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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Basic Science (68Ga-FAPi-46 PET/CT)

Patients receive 68Ga-FAPi-46 IV and undergo PET/CT imaging over 20-50 minutes.

Group Type EXPERIMENTAL

Computed Tomography

Intervention Type PROCEDURE

Undergo PET/CT imaging

Gallium Ga 68 FAPi-46

Intervention Type OTHER

Given IV

Positron Emission Tomography

Intervention Type PROCEDURE

Undergo PET/CT imaging

Interventions

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Computed Tomography

Undergo PET/CT imaging

Intervention Type PROCEDURE

Gallium Ga 68 FAPi-46

Given IV

Intervention Type OTHER

Positron Emission Tomography

Undergo PET/CT imaging

Intervention Type PROCEDURE

Other Intervention Names

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CAT CAT Scan Computerized Axial Tomography Computerized Tomography CT CT Scan tomography 68Ga-FAPi-46 Gallium-68-FAPi-46 Medical Imaging, Positron Emission Tomography PET PET Scan Positron Emission Tomography Scan Positron-Emission Tomography proton magnetic resonance spectroscopic imaging

Eligibility Criteria

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Inclusion Criteria

* Patients who underwent a 68Ga-PSMA-11 PET/CT scan within 3 months of enrollment
* Patients who are scheduled to undergo surgical excision or biopsy of a prostate cancer primary, recurrent or metastatic lesion
* Patients can provide written informed consent
* Patients are able to remain still for duration of imaging procedure (up to one hour)

Exclusion Criteria

* Patients with any new prostate therapy between the PSMA PET/CT and the FAP inhibitor (FAPI) PET/CT
Minimum Eligible Age

18 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

No

Sponsors

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Prostate Cancer Foundation

OTHER

Sponsor Role collaborator

Jonsson Comprehensive Cancer Center

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Jeremie Calais

Role: PRINCIPAL_INVESTIGATOR

UCLA / Jonsson Comprehensive Cancer Center

Locations

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UCLA / Jonsson Comprehensive Cancer Center

Los Angeles, California, United States

Site Status

Countries

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United States

Other Identifiers

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NCI-2020-02712

Identifier Type: REGISTRY

Identifier Source: secondary_id

20-000177

Identifier Type: OTHER

Identifier Source: secondary_id

20-000177

Identifier Type: -

Identifier Source: org_study_id

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