Mitochondrial function is altered in horse atypical myopathy.

The research article discusses the alteration of mitochondrial function in horses due to atypical myopathy – a fatal condition often caused by consumption of toxins present in the seeds and seedlings of the sycamore maple tree.

About Atypical Myopathy and the Study

• Atypical myopathy is a deadly muscle disease in horses, most prevalent in Europe. It often results from horses consuming hypoglycin A, a toxin found in the seeds and seedlings of the sycamore maple tree (Acer pseudoplatanus).
• The focus of the study was to establish links between the disease and alterations in mitochondrial function – the part of cells responsible for generating most of their energy. This was carried out by examining serum and muscle Oxidative Phosphorylation System (OXPHOS) capacity in 15 horses diagnosed with atypical myopathy.

Key Findings

• The study found that all but one of the acylcarnitine concentrations (metabolites involved in fat metabolism) in the horses were out of their typical range. This indicates a significant metabolic disruption in the affected horses.
• In addition to this, the mitochondrial respiratory capacity – the ability of the mitochondria to produce energy – was significantly reduced, in some cases by up to 49% when compared to the 10 healthy control horses. This severe impairment suggests a potentially major role for mitochondrial dysfunction in the progression of atypical myopathy.

Conclusion

• The research illustrates that atypical myopathy in horses is strongly associated with a severe alteration in energy metabolism, more specifically, a substantial impairment in muscle mitochondrial respiration. This finding could help explain why this condition has such a high mortality rate among affected horses.
• Understanding this connection between the disease and mitochondrial function could potentially aid in developing more effective treatment and prevention strategies for equine atypical myopathy in the future.