A genetic variant near the equine interleukin 6 gene associated with copper:zinc ratio.

This research investigates a genetic variant near the horse interleukin 6 gene to see if it correlates with interleukin 6 modulation or with different plasma concentrations of certain elements. The researchers found that horses with this genetic variant had increased copper:zinc ratios in their blood, but it was not associated with changes in interleukin 6 levels.

Objective of the Study

• The research aimed to validate a genetic variant (specifically an A/T single nucleotide polymorphism or SNP) located near the equine interleukin 6 gene.
• The researchers examined if this SNP (named SNP BIEC2-911738) correlates with any changes to the interleukin 6 (IL-6) modulation or causes different plasma concentrations of Zinc (Zn), Copper (Cu), Selenium (Se) and Iron (Fe).

Testing and Results

• The frequency of this new genetic variant, called variant T, varied between different horse breeds, with a frequency ranging from 0 to 23.1%.
• However, the study found that SNP BIEC2-911738 was not associated with changes in the IL-6 plasma levels in horses.
• Interestingly, higher copper to zinc ratios (Cu:Zn ratios) were observed in horses that had the AT genotype, regardless of breed. This was consistent, even when the horses were stabled for 24 hours after physical exercise.

Significance of the Findings

• The research suggests that this particular SNP (SNP BIEC2-911738) located near the interleukin 6 gene in horses could be associated with higher Cu:Zn ratios in their plasma.
• The lack of association between this SNP and changes in the horse’s IL-6 levels suggests that the variant’s presence doesn’t affect IL-6 modulation.
• These findings contribute to a greater understanding of the genomic factors that influence the concentration of certain elements in horse plasma and could have implications for horse health and nutrition.