A new study uncovers the genetic factors in feline cancers, paving the way for advancements in both animal and human cancer treatments.
Recent research has shed light on the genetic intricacies of cancer in domestic cats, marking a significant achievement in veterinary oncology. Published in Science, this study stands as the largest genetic profiling effort of cat cancers to date and holds promise for better understanding cancer mechanisms in both animals and humans, while creating an essential resource for future studies.
Cancer remains a leading cause of illness and mortality in cats, and until now, there was a surprising lack of knowledge about the genetics behind these conditions. Dr. Geoffrey Wood, a professor at the University of Guelph and co-senior author of the research, emphasized this gap by stating, "Despite domestic cats being common pets, there was very little known about the genetics of cancer in these animals — until now."
Genetic Similarities to Human Cancers
The research team analyzed tumor samples from nearly 500 domestic cats sourced from five different countries. Their investigation revealed numerous shared genetic mutations that contribute to cancer development in cats and were similar to those found in human and canine cancers.
Particularly striking was the discovery of mutations associated with aggressive mammary tumors in cats. The FBXW7 gene emerged as the most frequently altered in these tumors, with alterations present in over half of the cases studied. This gene also plays a critical role in human breast cancer, where mutations correlate with worse prognoses, mirroring the observations in felines.
The study wasn't limited to mammary tumors alone; the researchers identified comparable genetic changes in cancers affecting a range of systems including the blood, bones, lungs, skin, gastrointestinal tract, and central nervous system.
Interestingly, the overlap in living environments between cats and their owners led researchers to speculate that similar environmental factors might influence cancer risk for both species. "This study can help us understand more about why cancer develops in cats and humans," Wood added, potentially opening doors for preventative measures.
The Promise of Chemotherapy Advances
A particularly encouraging aspect of this study was the identification of certain chemotherapy drugs that demonstrated enhanced effectiveness in treating cat mammary tumors with the mutated FBXW7 gene. While these findings emerged from tissue analysis rather than live subjects, they suggest a pathway for possible new treatments that could benefit both feline and human patients.
Dr. Sven Rottenberg, co-senior author from the University of Bern, noted the unprecedented scale of the tissue samples helped assess drug responses effectively: "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."
Moreover, Bailey Francis, a co-first author based at the Wellcome Sanger Institute, pointed out that the flow of knowledge between species could also yield insights beneficial to canine health.
Collaboration Through the "One Medicine" Framework
This collaborative research initiative brought together expertise from various institutions such as the Wellcome Sanger Institute, the Ontario Veterinary College, and the University of Bern, among others. DNA sequencing was performed on samples collected by veterinarians for diagnostic reasons, allowing for a robust analysis of cancer genetics.
Findings indicate that human treatments currently in use might be applicable to cats, thus suggesting that insights gained from feline cancer studies could enhance human clinical research as well. This interconnected approach is rooted in the "One Medicine" philosophy, encouraging collaboration between veterinary and human medical researchers to advance health outcomes across different species.
Dr. Louise Van Der Weyden, a senior author at the Wellcome Sanger Institute, expressed optimism for the future: "We can now begin to take the next steps forward towards precision feline oncology, to catch up with the diagnostic and therapeutic options available for dogs with cancer, and ultimately one day, humans."
The study received support from various organizations, including the EveryCat Health Foundation and Wellcome, highlighting the communal effort behind these findings.
Materials provided by University of Guelph. Content may be edited for style and length.
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