Scientists conducting a large-scale genetic study of feline tumors have discovered shared cancer mutations with humans that could accelerate new medical treatments, according to research published in the journal Science.
The research team identified key genes responsible for uncontrolled cell growth in cats and uncovered significant genetic parallels across several forms of human cancer.
The most pronounced parallel appeared in aggressive breast cancer, where researchers found that more than half of the cat tumors examined contained mutations in a gene known as FBXW7.
In human patients, damage to the FBXW7 gene is linked to a worse disease outcome. Loss of the gene allows proteins that stimulate cell growth to accumulate within body tissues, driving tumor development.
The FBXW7 gene normally functions as a critical tumor suppressor in mammalian biology. In healthy cells, tumor suppressor genes act as natural regulatory brakes by producing proteins that monitor cell division and degrade excess growth-stimulating proteins before cells can multiply uncontrollably.
Genetic similarities in multiple cancers
Beyond breast cancer, researchers recorded matching genetic mutations in feline and human tumors affecting the blood, bones, lungs, skin, gastrointestinal tract and brain.
Laboratory tests conducted as part of the study demonstrated that tumors carrying mutations in the FBXW7 gene were notably more sensitive to specific targeted chemotherapy drugs.
Targeted chemotherapy represents a major branch of modern precision medicine. Unlike conventional chemotherapy drugs, which attack all rapidly dividing cells throughout the body, targeted therapies are engineered to focus on specific mutated proteins or genetic pathways that allow cancer cells to survive.
Comparative oncology is the branch of medical science that studies naturally occurring cancers in animals to gain insights into human disease. Domestic cats live in the same environments as humans and naturally develop complex tumors over their lifetimes, making their tumor pathology far closer to human cancer than artificial laboratory rodent models.
Tissue testing and future drugs
Although the experimental tests were conducted only on tissue samples in a laboratory setting, researchers believe the findings could speed up the development of targeted drugs for human cancer treatment.
The study was published in Science, a weekly peer-reviewed academic journal produced by the American Association for the Advancement of Science. Founded in 1880, Science is widely considered one of the premier scientific publications in the world, alongside Nature.
Breast cancer remains one of the most frequently diagnosed cancers worldwide, affecting millions of patients annually. Feline mammary tumors are often aggressive and clinically challenging, meaning discoveries surrounding FBXW7 gene mutations could inform future treatment strategies in both human oncology and veterinary medicine.
