Plasma and liver copper values in horses with equine degenerative myeloencephalopathy.

This study aims to determine whether there is a correlation between levels of copper in the plasma and liver of horses and equine degenerative myeloencephalopathy (EDM), a common neurological disorder in horses. The findings reveal no significant difference in the copper values of horses affected by EDM when compared to healthy controls.

Objective and Background

• This research was performed to investigate the potential correlation between copper levels in plasma and liver with the incidence of equine degenerative myeloencephalopathy (EDM), a prevalent neurodegenerative disease in horses. The etiology of EDM remains unclear.
• The study was fueled by observations in other species indicating similarities in clinical symptoms and neuropathological changes observed in EDM and cases of copper deficiency.

Methodology

• The research was conducted on a sample of 60 horses; 25 were EDM-affected, while 35 were deemed healthy (serving as control).
• Using diagnostic laboratory tests, copper levels in plasma were measured. Similarly, copper levels in liver samples were determined.
• These results were evaluated alongside each horse’s health status (either healthy or EDM-affected), aiming to factually uncover any relationship between copper concentration and the occurrence of EDM.

Findings

• The results indicated no significant difference between copper concentrations in the plasma or liver of EDM-affected horses and the control group of healthy horses.
• Thus, the hypothesis that copper deficiency might be related to or a cause for EDM was not supported by the study’s results.

Implications

• These findings suggest that copper deficiency may not be a contributing factor to the development of EDM in horses.
• In other species, copper deficiency is linked to similar neurological disorders but, as this study shows, such implications may not be transferrable to horses, at least not in the context of EDM.
• Future research concerning the etiology of EDM should explore other potential causal factors beyond copper deficiency.