In Vivo PARP-1 Expression With 18F-FTT PET/CT in Pancreatic Cancer

Early Phase 1

Terminated

• Conditions: Pancreatic Cancer
• Interventions: Drug: [18F]FluorThanatrace ([18F]FTT)

• Registration Number: NCT03492164
• Lead Sponsor: Abramson Cancer Center at Penn Medicine

Brief Summary

The investigators plan to enroll 30 evaluable patients with (1) a histological diagnosis of advanced pancreatic ductal adenocarcinoma who have demonstrated at least stable disease following ≥16 weeks of treatment with platinum-based chemotherapy and (2) who have signed consent to participate in a clinical trial that contains PARP inhibitor therapy and are anticipated to receive this treatment or (3) will receive PARP inhibitor therapy as part of their clinical care.

A pre-treatment 18F-FluorThanatrace (\[18F\]FTT) positron emission tomography/computed tomography (PET/CT) scan will be done prior to the start of treatment with a PARP inhibitor.

PET/CT imaging will be used to evaluate PARP-1 expression in sites of pancreatic cancer using the investigational radiotracer \[18F\]FTT. This is an observational study in that \[18F\]FTT PET/CT will not be used to direct treatment decisions. While patients and referring physicians will not be blinded to the \[18F\]FTT PET/CT results, treatment decisions will be made by the treating physicians based upon clinical criteria.

Patients will undergo approximately 60 minutes of dynamic scanning starting at the time of injection of \[18F\]FTT. This procedure will be followed by a skull base to mid-thigh scan, starting at approximately 60 minutes post injection. PET/CT imaging sessions will include an injection of approximately 10 mCi (approximate range for most studies is anticipated to be 8-12 mCi) of \[18F\]FTT. Data will be collected to evaluate uptake of \[18F\]FTT in sites of pancreatic cancer, which will be compared with PARP-1 expression in tissue, when available.

All 30 evaluable patients are expected to start PARP inhibitor therapy following the \[18F\]FTT PET/CT scan. It is expected that due to patient preference and time considerations, approximately 24 patients (80%) will also undergo a second (optional) scan that will be performed approximately 3 weeks (± 1 week) after therapy has started. The second scan is obtained to evaluate whether the PARP inhibitor therapy decreases \[18F\]FTT uptake, which would suggest PARP blocking by the therapy.

Detailed Description

Not available

Study Timeline

• Study Start: 2018-03-20
• Study First Submitted: 2018-04-03
• Study First Submitted QC: 2018-04-03
• Study First Posted: 2018-04-10
• Status Verified: 2024-06
• Primary Completion: 2024-06-11
• Study Completion: 2024-06-11
• Last Update Submitted: 2024-06-11
• Last Update Posted: 2024-06-12

Recruitment & Eligibility

• Status: TERMINATED
• Sex: All
• Target Recruitment: 6

Inclusion Criteria

• Participants will be ≥ 18 years of age.
• Histologically proven pancreatic adenocarcinoma. .
• Deemed to have achieved stability following ≥16 weeks of platinum based therapy, in the opinion of an investigator
• Considered a candidate for PARP inhibitor therapy, with or without additional agents, either on a clinical trial or as part of clinical care.
• Participants must be informed of the investigational nature of this study and provide written informed consent in accordance with institutional and federal guidelines prior to study-specific procedures.

Exclusion Criteria

• Females who are pregnant or breast feeding at the time of screening will not be eligible for this study; a urine pregnancy test will be performed in women of child-bearing potential at screening.
• Inability to tolerate imaging procedures in the opinion of an investigator or treating physician
• Serious or unstable medical or psychological conditions that, in the opinion of the investigator, would compromise the subject's safety or successful participation in the study.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
[18F]FluorThanatrace ([18F]FTT)	[18F]FluorThanatrace ([18F]FTT)	1-(4-(2-Fluoroethoxy)phenyl)-8,9-dihiydro-2,7,9a-triazabenzo\[cd\]azulen-6(7H)-one also known as \[18F\]FluorThanatrace or \[18F\]FTT is a positron emitting radiopharmaceutical that has been studied in animals for selective measurement of the in vivo inhibition of the PARP-1 nuclear enzyme with positron emission tomography (PET/CT).

Primary Outcome Measures

Name	Time	Method
Number of Adverse Events	3 years

Trial Locations

Locations (1)

Abramson Cancer Center of the University of Pennsylvania; 🇺🇸 Philadelphia, Pennsylvania, United States