New tricks in canine cancer aim to treat humans, too
PHILADELPHIA: Flyer, a 70-pound golden retriever, lies patiently on her left side on an examination table as technicians scurry around, placing little sandbags on her legs and neck to keep her still. She’s getting chest X-rays to answer a critical question: Has a deadly bone cancer spread to her lungs?
When the session is over, Martha MaloneyHuss, a veterinarian at the University of Pennsylvania’s Ryan Veterinary Hospital, glances at the images. “I don’t see anything hugely obvious,” she says, “but we’ll see what the radiologist says.” Oblivious to the good news, Flyer hops down the hall on three legs, eager to find her owner.
After the eight-year-old retriever began limping last year, she was diagnosed with osteosarcoma, a painful, aggressive cancer that often strikes Great Danes, Irish wolfhounds and other large breeds. At Penn Vet, she got the standard treatment: One of her left legs was amputated, and she underwent chemotherapy.
Yet even as she adjusted to chasing squirrels, her prognosis was bleak. Most dogs die in about a year when the disease resurfaces in the lungs. The Penn vets recommended an experimental vaccine designed to prevent or delay the cancer’s return; Flyer’s owner was enthusiastic. The dog got three intravenous doses as part of a clinical trial and now returns to Penn periodically for X-rays.
“Every day I pray that she will stay cancer-free,” said her owner, Bob Street, who lives in Mullica Hill, New Jersey. “And that this treatment will work for other dogs and for people.”
Flyer is part of a field called “comparative oncology.” It focuses on finding new ways to treat cancer in pets, mostly dogs, in an effort to develop innovative treatments for people and animals.—