Two Cats with Marfan Syndrome Break Veterinary Record
Gary and Shaggy, two domestic shorthair brothers, were the first pets confirmed to have Marfan syndrome, a rare connective-tissue disorder. Their unusually long legs-Gary’s radius and tibia were more than 42 % longer than average-prompted veterinary and genetic investigations. Genetic testing revealed mutations in the FBN1 gene in both cats, and both carried changes in both copies of the gene. The mutations did not eliminate gene function entirely; the cats produced some FBN1 protein, a state described as genetically homozygous but functionally heterozygous.
The brothers suffered from eye abnormalities and cardiovascular changes, and their treatment eventually required removal of their eyes. Shaggy lived to 7 years 2 months and Gary to 5 years 10 months. Their cases add to only two confirmed nonhuman instances of Marfan syndrome, the first being a 2005 cattle study.
Veterinarians now recognize that cats with similar limb proportions, eye issues, and heart or vessel changes may have this rare genetic condition. The research may lay groundwork for better diagnostics and genetic testing in animals.
Key takeaways
- Gary and Shaggy were the first confirmed domestic pets with Marfan syndrome.
- Both cats had FBN1 mutations in both gene copies but still produced some protein.
- Their medical care included eye removal; Shaggy lived 7 years 2 months, Gary 5 years 10 months.
- Only one other nonhuman animal-cattle-had been confirmed with the condition before.
- The findings could improve veterinary diagnostics for similar cases.
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Originally reported by iHeartCats. Read the full article.
Cover photo by Tuğba via Pexels.
