Validity and application of immunoturbidimetric and enzyme-linked immunosorbent assays for the measurement of adiponectin concentration in ponies.

This research investigates the validity of two methods, Immunoturbidimetric and enzyme-linked immunosorbent assays, for measuring the concentration of adiponectin – a protein hormone – in ponies. The study also explores the connection between adiponectin and endocrinopathic laminitis, a hoof disease in horses.

Methodology

• The researchers performed tests to ascertain the accuracy and precision of both the immunoturbidimetric (IT) and enzyme-linked immunosorbent (ELISA) assays for measuring total and high molecular weight adiponectin.
• The team conducted experiments to assess the effects of the presence of an anticoagulant and storage temperature on the IT assay.
• They measured the Total Adiponectin Concentration (TAC) in two groups of ponies; those that previously had endocrinopathic laminitis (PL) and those that never had the hoof disorder (NL).
• The performance of the assays were compared against an already validated method, the radioimmunoassay.
• Lastly, they made strides to identify the association between TAC and the development of endocrinopathic laminitis in NL ponies.

Results

• The IT was accurate and aligned well with the previously validated radioimmunoassay. However, the ELISA methods were not properly validated.
• TAC measured was significantly lower in ponies that had suffered laminitis and in those NL ponies that later showed symptoms within 12 months.
• Adequate accuracy was found when the area under the Receiver Operating Characteristic (ROC) curve was used to differentiate the animals that did and those that did not contract laminitis.

Conclusions

• The data indicated laminitis risk is based on ponies from one region.
• The Immunoturbidimetric method was valid for measuring equine TAC. However, the ELISA methods were not suited, neither for TTAC nor for high molecular weight adiponectin.
• Ponies with lower TAC either had a history of laminitis or subsequently developed the ailment.

These findings highlight the relevance of adiponectin as a potential biomarker for predicting the risk of endocrinopathic laminitis in equines. Further research should establish benchmarks for normal adiponectin levels to better manage horses at risk for developing this disorder.