Pilot Study of 18F Fluoropaclitaxel (FPAC)

Summary

Multidrug resistance (MDR) is a cause of treatment failure in many cancer patients. MDR refers to a phenotype whereby a tumor is resistant to a large number of natural chemotherapeutic drugs. Having prior knowledge of the presence of such resistance would decrease morbidity from unsuccessful therapy and allow for the selection of individuals who may benefit from co-administration of MDR inhibiting drugs. The Tc-99m labeled single photon emitting radiotracers sestamibi and tetrofosmin have shown some predictive value. However, positron-emitting (PET) radiotracers, which allow for dynamic, quantitative imaging, hold the promise of more accurate and specific identification of MDR tumors. Objective: To obtain human safety data, to demonstrate imaging feasibility with FPAC, to obtain human biodistribution and to obtain preliminary evidence of breast tumor uptake concordance with response to therapy.

Timeline

Start

2005-05

Primary completion

2008-03

Completion

2008-03

Publications

• Background Kalen JD, Hirsch JI, Kurdziel KA, Eckelman WC, Kiesewetter DO. Automated synthesis of 18F analogue of paclitaxel (PAC): [18F]Paclitaxel (FPAC). Appl Radiat Isot. 2007 Jun;65(6):696-700. doi: 10.1016/j.apradiso.2006.10.015. Epub 2006 Dec 11.
• Results Kurdziel KA, Kalen JD, Hirsch JI, Wilson JD, Agarwal R, Barrett D, Bear HD, McCumiskey JF. Imaging multidrug resistance with 4-[18F]fluoropaclitaxel. Nucl Med Biol. 2007 Oct;34(7):823-31. doi: 10.1016/j.nucmedbio.2007.04.011. Epub 2007 Jul 5.
• Results Kurdziel KA, Kalen JD, Hirsch JI, Wilson JD, Bear HD, Logan J, McCumisky J, Moorman-Sykes K, Adler S, Choyke PL. Human dosimetry and preliminary tumor distribution of 18F-fluoropaclitaxel in healthy volunteers and newly diagnosed breast cancer patients using PET/CT. J Nucl Med. 2011 Sep;52(9):1339-45. doi: 10.2967/jnumed.111.091587. Epub 2011 Aug 17.

Drugs

Indications