Researchers have completed one of the largest studies ever conducted on tumors in domestic cats, and the findings could reshape cancer care for animals and offer clues for people as well. Published in Science, the first large-scale genetic profiling effort in feline cancers examined tumor samples from nearly 500 domestic cats collected across five countries and found many of the same cancer-driving genes seen in human and dog cancers.
At the center of the study was FBXW7, the gene most frequently altered in feline mammary tumors. The mutations showed up in more than half of the breast tumors studied, a pattern that matters because in human breast cancer, FBXW7 changes are associated with poorer outcomes. Researchers also found similarities between feline and human cancers affecting the blood, bones, lungs, skin, gastrointestinal tract and central nervous system.
Dr. Geoffrey Wood said that despite domestic cats being common pets, very little had been known about the genetics of cancer in these animals. He said the new work can help scientists understand why cancer develops in cats and humans, how the world around them influences cancer risk, and possibly find new ways to prevent and treat it. The study was built on donated tissue, and researchers say that large collection gave them a scale they had not been able to reach before.
That scale mattered because it allowed the team to look beyond genetic similarities and test how tumors responded to treatment. Certain chemotherapy drugs appeared to work better in cat mammary tumors carrying the mutated FBXW7 gene, though the results were seen only in tissue samples. Dr. Sven Rottenberg said having access to such a large set of donated tissues allowed the researchers to assess drug responses across tumor types. The work may also help dogs, which share some of the same cancer pathways.
The bigger question is not whether cats and people get the same disease in the same way. They do not. It is whether the shared biology can be used to improve care in both. Cats often live in the same environments as their owners, and researchers believe those common exposures may be part of the reason the tumors look so alike. The study is also meant to become an open resource for future feline cancer research, giving scientists a stronger map of a disease that has long been underexplored.
Bailey Francis summed up the value of that kind of exchange in one line: when knowledge and data flow between different disciplines, everyone can benefit. For cat owners, that may mean better cancer care down the line. For cancer researchers, it means a new model of a disease that has been hiding in plain sight.
