Pilot Study of 18F Fluoropaclitaxel (FPAC) in Breast Cancer Patients and Normal Volunteers: Dosimetry and Imaging Feasibility
18F flouropaclitaxel (FPAC) distribution in malignant tumors is expected to be similar to
that of paclitaxel. It is proposed that by monitoring the influx and efflux of FPAC in vivo
using PET imaging, we will be able to determine if a tumor retains the drug (is drug
sensitive) or pumps it out (is drug resistant). The efflux rate of FPAC in the tumor should
be proportional the amount of Pgp present and therefore should be a predictor of treatment
failure. If this method is successful at identifying MDR, patients can be spared a course
of ineffective chemotherapy and can be started on alternative drugs or, if available, an
effective MDR modulator can be administered prior to treatment.
In order to validate the biodistribution in non-human primate, 3 normal volunteers will be
recruited to participate in a dosimetry PET imaging protocol.
Often, patients with breast cancer are treated with chemotherapy prior to definitive
surgical removal of the primary tumor. Three patients with breast cancer who are candidates
for this neoadjuvant chemotherapy will also be recruited to participate in this study, in
order to demonstrate the feasibility of tumor imaging. As these patients will be receiving
chemotherapy (likely paclitaxel), a preliminary correlation with FPAC uptake and tumor
response can also be attempted in this pilot study.
Primary Objective
--To obtain human dosimetry and monitor for potential physiologic effects following 4-[F-18]
fluoropaclitaxel (FPAC) administration
Secondary Objectives
- a.To characterize tracer uptake in tumors and normal tissues and develop robust methods
for analysis of FPAC kinetics in breast tumors
- b.To optimize the imaging protocol for FPAC, and, if feasible, reduce to 1 or 2 static
scans
Normal Volunteers
Interventional
Intervention Model: Single Group Assignment, Masking: Open Label
Imaging feasibility and dosimetry
<6months
No
Harry D. Bear, MD, PhD
Principal Investigator
Virginia Commonwealth University
United States: Food and Drug Administration
HM03748
NCT00572598
May 2005
March 2008
Name | Location |
---|---|
Virginia Commonwealth University | Richmond, Virginia |