Differences in extracellular matrix proteins between Friesian horses with aortic rupture, unaffected Friesians and Warmblood horses.

Authors: Ploeg M, Gröne A, van de Lest C H A, Saey V, Duchateau L, Wolsein P, Chiers K, Ducatelle R, van Weeren P R, de Bruijn M, Delesalle C

Journal: Equine veterinary journal

DOI: 10.1111/evj.12654 PubMed: 27859600Log in to save

Summary

# Editorial Summary Aortic rupture causes sudden death in Friesian horses at disproportionately high rates compared to other breeds, suggesting a heritable connective tissue defect, yet the precise molecular mechanisms underlying this breed predisposition remain poorly understood. Researchers examined extracellular matrix protein composition in aortic tissue samples from affected Friesians, unaffected Friesian controls, and Warmblood horses to determine whether biochemical abnormalities in the aortic wall could explain the histological degenerative changes—medial necrosis, elastic fibre fragmentation and aberrant collagen architecture—previously documented in affected animals. The study identified significant quantitative and qualitative differences in extracellular matrix proteins between affected Friesians and both control groups, pointing toward specific molecular alterations that compromise aortic structural integrity in this breed. These findings have implications for identifying at-risk individuals through genetic or biochemical screening, developing targeted preventative strategies, and potentially understanding why Friesian-cross animals may inherit variable susceptibility to aortic disease. For equine professionals, this research emphasises the importance of recognising aortic rupture as a breed-specific genetic concern requiring careful pre-purchase vetting and informed breeding decisions.

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Practical Takeaways

•Friesian horse owners and veterinarians should be aware of the breed-specific risk for aortic rupture and consider this in pre-purchase evaluations and clinical assessments
•Understanding the molecular basis of aortic rupture in Friesians may enable future screening or preventative interventions for at-risk individuals
•The hereditary nature of this condition warrants careful consideration in breeding decisions within the Friesian population

Key Findings

•Friesian horses have significantly higher incidence of aortic rupture compared to Warmblood horses, suggesting a hereditary predisposition
•Histological examination reveals medial necrosis, elastic fibre fragmentation, and aberrant collagen morphology in affected Friesian aortic tissue
•Extracellular matrix protein composition differs between affected Friesians, unaffected Friesians, and Warmblood horses

Conditions Studied

aortic rupturemedial necrosiselastic fibre fragmentationmucoid material accumulationfibrosis

Related References

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