Cat Cancer Study Unlocks New Treatment Hope for Humans

Your cat might hold the key to curing some of humanity's deadliest cancers.

Scientists at the University of Guelph just completed one of the largest genetic studies ever conducted on cat tumors, analyzing samples from nearly 500 cats across five countries. What they found surprised even the researchers: cat cancers share many of the same dangerous genetic mutations found in human cancers.

"Despite domestic cats being common pets, there was very little known about the genetics of cancer in these animals until now," said Dr. Geoffrey Wood, a professor of pathobiology who co-led the study published in Science. The research represents the first large-scale effort to genetically profile cancers in cats.

The team discovered that mutations in a gene called FBXW7 appeared in more than half of all feline mammary tumors studied. In human breast cancer, those same mutations are linked to poorer outcomes and more aggressive disease.

The similarities extend far beyond breast cancer. Researchers identified genetic overlaps between feline and human cancers affecting blood, bones, lungs, skin, the gastrointestinal system, and even the central nervous system.

Because cats share our homes and environments, scientists believe some cancer risks might stem from common exposures. "This study can help us understand more about why cancer develops in cats and humans, how the world around us influences cancer risk, and possibly find new ways to prevent and treat it," Wood explained.

The Bright Side

The research team made an especially promising discovery when testing tissue samples in the lab. Certain chemotherapy drugs worked better against cat mammary tumors carrying the mutated FBXW7 gene.

While these results still need testing in living animals and humans, they point toward a future where treatments could be tailored based on specific genetic mutations. "Having access to such a large set of donated tissues allowed us to assess drug responses across tumor types in a way that hasn't been possible at this scale before," said Dr. Sven Rottenberg from the University of Bern.

The findings could also benefit dogs, whose cancer genetics have been more extensively studied. "When knowledge and data flows between different disciplines, we can all benefit," said Bailey Francis, co-first author at the Wellcome Sanger Institute.

This collaborative approach is called "One Medicine," a strategy where veterinary and medical researchers share discoveries to improve health outcomes across species. Treatments already used in humans could eventually be tested in cats, while cancer trials involving cats could guide future human clinical research.

Dr. Louise Van Der Weyden from the Wellcome Sanger Institute believes this is just the beginning: "We can now begin to take the next steps forwards towards precision feline oncology, to catch up with the diagnostic and therapeutic options that are available for dogs with cancer, and ultimately one day, humans."

The furry companions curled up on our couches might just help us solve one of medicine's biggest challenges.