A preliminary study on the effect of wounding on transforming growth factor-β1 and cartilage oligomeric matrix protein concentrations in the skin of horses.

Authors: Dart Andrew J, Dart Christina M, Dudhia Jay, Perkins Nigel, Canfield Paul, Smith Roger K W

Journal: Veterinary surgery : VS

DOI: 10.1111/j.1532-950X.2010.00756.x PubMed: 21062324Log in to save

Summary

# Editorial Summary Wound healing in horses involves complex biochemical processes that are poorly understood, particularly regarding the role of growth factors and structural proteins in tissue repair. Dart and colleagues examined whether cartilage oligomeric matrix protein (COMP) and transforming growth factor β1 (TGF-β1)—both implicated in tissue remodelling—varied depending on wound characteristics or location by creating standardised full-thickness skin wounds at two anatomically distinct sites (neck and metacarpus) on six horses and measuring protein concentrations in tissue samples collected over 42 days. Contrary to initial hypotheses, COMP and TGF-β1 concentrations showed no significant differences between wound types or healing sites during the study period, and critically, no correlation emerged between these two biomarkers despite their presumed roles in tissue repair. The only notable finding was elevated baseline COMP in intact neck skin compared with the metacarpus, suggesting regional variation may be site-specific rather than wound-response-dependent. Whilst this preliminary work does not definitively establish the relationship between growth factors and extracellular matrix proteins during equine wound healing, the lack of site-dependent variation challenges assumptions about healing mechanisms and warrants further investigation into which biochemical pathways actually govern skin repair in horses.

Read the full abstract on PubMed

Practical Takeaways

•Wound shape and location do not significantly influence the biochemical healing response in equine skin wounds, suggesting wound management protocols can be simplified
•The lack of correlation between TGF-β1 and COMP suggests these biomarkers represent independent healing pathways and may require separate monitoring in clinical practice
•Baseline COMP levels vary by anatomical location even in intact skin, which should be considered when interpreting tissue biomarker concentrations

Key Findings

•COMP concentrations were significantly higher in intact neck skin compared to metacarpal skin (P=0.02)
•COMP and TGF-β1 concentrations did not differ between open, straight, and elliptical wound types during healing
•No correlation was found between TGF-β1 and COMP concentrations during the 42-day healing period
•Wound site location (neck vs metacarpus) did not influence COMP or TGF-β1 production during healing

Conditions Studied

skin woundsfull-thickness skin lesions

Related References

Preliminary observations on expression of transforming growth factors beta1 and beta3 in equine full-thickness skin wounds healing normally or with exuberant granulation tissue.

Theoret Christine L, Barber Spencer M, Moyana Terence N, Gordon John R(2002)Veterinary surgery : VS

Concentration of collagen, aggrecan and cartilage oligomeric matrix protein (COMP) in synovial fluid from equine middle carpal joints.

Skiöldebrand E, Lorenzo P, Zunino L, Rucklidge G J, Sandgren B, Carlsten J, Ekman S(2001)Equine veterinary journal

Temporal localization of immunoreactive transforming growth factor beta1 in normal equine skin and in full-thickness dermal wounds.

Theoret Christine L, Barber Spencer M, Gordon John R(2002)Veterinary surgery : VS

The distribution of cartilage oligomeric matrix protein (COMP) in equine carpal articular cartilage and its variation with exercise and cartilage deterioration.

Murray R C, Smith R K, Henson F M, Goodship A(2001)Veterinary journal (London, England : 1997)

Cartilage oligomeric matrix protein (COMP) levels in digital sheath synovial fluid and serum with tendon injury.

Smith R K, Heinegård D(2000)Equine veterinary journal

A preliminary study on the effect of wounding on transforming growth factor-&#x3b2;1 and cartilage oligomeric matrix protein concentrations in the skin of horses.