Stuart Helfand, DVM




Radiation Medicine


Veterinary Oncology


D.V.M., Colorado State University, 1978


Medical Oncology, School of Veterinary Medicine, University of California, Davis, 1983


American College of Veterinary Internal Medicine Oncology, 1989 American College of Veterinary Internal Medicine, Internal Medicine, 1984

Special Interest:

Endothelial cancer (hemangiosarcoma), osteosarcoma, squamous cell carcinoma, targeted therapies, immunotherapy

Memberships and Associations:

American Association for Cancer Research Veterinary Cancer Society
American College of Veterinary Internal Medicine


Our laboratory has a long standing interest in cancer immunotherapy and its impact on modulation of angiogenesis. We have been particularly interested in development of novel approaches to target the immunostimulatory and anti-angiogenic cytokine, interleukin-12, to vasculature within the tumor microenvironment. This work has evolved to include other approaches to suppress endothelial cell proliferation. Our current focus is on tyrosine kinase signaling pathways in malignant endothelial cells (i.e., canine hemangiosarcoma) in an effort to elucidate derangements and identify candidate aberrant kinases amenable to blockade by tyrosine kinase inhibitors. We are pursuing the potential to combine these various modalities with radiotherapy in tumor bearing animals. Other areas of interest include development of novel therapeutics for canine osteosarcoma and squamous cell carcinoma.

Dr. Helfand’s research is dedicated to improving the health of animals with cancer while at the same time capitalizing on the unique opportunities presented by spontaneous tumors in pet animals as models for comparable cancers in humans. He is Professor of Oncology in the College of Veterinary Medicine, Oregon State University.

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