The Science
An international team of scientists has cracked open the “black box” of feline cancer by genetically analyzing nearly 500 cat tumors from around the world. The landmark study uncovered striking similarities between cancers in cats, dogs, and humans — including shared cancer-driving genes tied to aggressive breast cancers.
The researchers sequenced the complete genomes of tumors from various cat breeds, identifying recurrent mutations in genes such as TP53, KRAS, and PIK3CA — all well-known drivers of human cancers. Most notably, they discovered a feline breast cancer subtype that shares genetic signatures with human triple-negative breast cancer, an especially aggressive and difficult-to-treat form. This subtype accounts for about 15% of breast cancer cases in women and lacks effective targeted therapies, so finding a natural animal model is a significant breakthrough.
“Feline cancer may be a more faithful model than mice for developing human therapies, potentially accelerating drug discovery.”
The research went beyond mammary tumors. It also analyzed lymphomas, sarcomas, and oral carcinomas, finding that feline mutational profiles more closely resemble human profiles than those of laboratory mice. This suggests cats could be used to study a wide range of cancers, not just breast cancer. Moreover, feline tumors develop in an intact immune system, unlike immunocompromised mice, allowing researchers to investigate cancer-immune interactions more realistically.
