Table of Contents Author Guidelines Submit a Manuscript
Veterinary Medicine International
Volume 2014, Article ID 675172, 8 pages
http://dx.doi.org/10.1155/2014/675172
Research Article

Pamidronate Disodium for Palliative Therapy of Feline Bone-Invasive Tumors

1University of Illinois at Urbana-Champaign, Urbana, IL 61802, USA
2Advanced Veterinary Care Center, Lawndale, CA 90260, USA

Received 4 February 2014; Accepted 17 April 2014; Published 9 June 2014

Academic Editor: Philip H. Kass

Copyright © 2014 Jackie M. Wypij and David A. Heller. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study sought to quantify in vitro antiproliferative effects of pamidronate in feline cancer cells and assess feasibility of use of pamidronate in cats by assessing short-term toxicity and dosing schedule in cats with bone-invasive cancer. A retrospective pilot study included eight cats with bone invasive cancer treated with intravenous pamidronate. In vitro, pamidronate reduced proliferation in feline cancer cells ( ). One cat treated with pamidronate in combination with chemotherapy and two cats treated with pamidronate as a single agent after failing prior therapy had subjective clinically stable disease; median progression free interval in these cats from initial pamidronate treatment was 81 days. Three cats developed azotemia while undergoing various treatment modalities including nonsteroidal anti-inflammatory drugs and pamidronate. Median overall survival was 116.5 days for all cats and 170 days for cats with oral squamous cell carcinoma. Median progression free survival was 55 days for all cats and 71 days for cats with oral squamous cell carcinoma. Pamidronate therapy appears feasible for administration in cancer bearing cats with aggressive bone lesions in the dose range of 1-2 mg/kg every 21–28 days for multiple treatments. No acute or short-term toxicity was directly attributable to pamidronate.