Identification of mRNA of the Inflammation-associated Proteins CXCL8, CXCR2, CXCL10, CXCR3, and β-Arrestin-2 in Equine Wounded Cutaneous Tissue: a Preliminary Study.

This is a preliminary equine study that identifies the presence of mRNA of five inflammation-associated proteins in horse skin wounds. The study highlights the variability in these protein patterns in different parts of a horse’s body, suggesting their possible role in the unusual healing rates of wounds, particularly limb ones.

Objective of the Research

• The main goal of the study was to investigate the presence and patterns of mRNA of five inflammation-associated proteins (CXCL8, CXCR2, CXCL10, CXCR3, and β-arrestin-2) in horse cutaneous (skin) tissue. This forms a crucial part of understanding the process of healing in horses, particularly with respect to why limb wounds take longer to heal than those on other parts of the body.

Methodology

• The study was carried out on two horses on which surgical wounds were created on the limb and thorax. The researchers took biopsies of these wounds on days 0, 1, 2, 7, 14, and 33 post-surgery.
• The mRNA expression levels of the five proteins were then measured using QuantiGene Plex Assay. This technique allowed researchers to observe the expression levels in mean fluorescent intensity.

Findifications

• The researchers successfully identified all five proteins in the equine cutaneous tissue.
• Preliminary results show there is a variation in the expression patterns of CXCL8, CXCR2, and β-arrestin-2 between the limb and thorax. However, this variation was not observed in the case of CXCL10 and CXCR3.
• The different regulations of CXCL8, CXCR2, and β-arrestin-2 imply they might contribute to the disparate healing rates seen in limb wounds and body wounds. This finding warrants further investigation to confirm the role these proteins play in wound healing.

Implication and Future Research

• The findings of this preliminary study are significant as they open a new avenue of research into wound healing in horses. The identification of these proteins and understanding their roles and regulation can potentially be instrumental in developing targeted treatments for wounds, especially “difficult to heal” wounds on limbs.
• Further studies are required to verify the role these identified proteins play in inflammation and wound healing. Additional research should also seek to understand the manner in which these proteins are regulated, particularly in the context of limb wounds.