Biomechanical and biochemical properties of the thoracic aorta in warmblood horses, Friesian horses, and Friesians with aortic rupture.

Authors: Saey Veronique, Famaey Nele, Smoljkic Marija, Claeys Erik, van Loon Gunther, Ducatelle Richard, Ploeg Margreet, Delesalle Catherine, Gröne Andrea, Duchateau Luc, Chiers Koen

Journal: BMC veterinary research

DOI: 10.1186/s12917-015-0597-0 PubMed: 26581331Log in to save

Summary

Thoracic aortic rupture remains a devastating condition with a marked breed predisposition in Friesians, yet the underlying biomechanical factors remain poorly understood. Researchers compared aortic tissue samples from three groups—warmbloods, unaffected Friesians, and Friesians with aortic rupture—across three anatomical sites (ligamentum arteriosum and proximal/distal thoracic aorta), using uniaxial tensile testing and biochemical analysis to quantify collagen and elastin composition. The study identified intrinsic differences in the biomechanical properties and structural composition of the aortic wall between breed groups and affected individuals, suggesting that inherent weakness in elastic and collagenous tissue architecture predisposes certain Friesians to rupture. These findings offer a biological explanation for the breed's increased vulnerability and may eventually guide screening protocols or breeding decisions to reduce incidence. For practitioners managing high-risk Friesian clients, these insights underscore the importance of recognising early clinical signs of aortic compromise and may inform future development of diagnostic tools or preventative strategies within the breed.

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Practical Takeaways

•Friesian horses have breed-specific aortic wall vulnerability; awareness of this inherited predisposition should inform breeding decisions and screening protocols
•Early recognition of aortic rupture risk factors in Friesian horses may enable preventive veterinary management strategies
•Understanding the biomechanical basis of aortic failure in this breed could guide selection criteria and health monitoring in Friesian breeding programs

Key Findings

•Friesian horses with aortic rupture show intrinsic biomechanical differences in thoracic aortic wall properties compared to unaffected Friesians and warmblood horses
•Biochemical composition of collagen and elastin in the aortic wall differs between affected Friesians, unaffected Friesians, and warmblood horses
•The ligamentum arteriosum (LA), mid thoracic (T1), and distal thoracic (T2) aortic regions demonstrate region-specific biomechanical properties

Conditions Studied

thoracic aortic ruptureaortopulmonary fistulationfriesian breed predisposition

Related References

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