Investigation of Serum Markers of Hepatic Fibrosis in Equids.
Authors: Potier Julie F N, Durham Andy E, Modi Raakesh, Rosenberg William, Dash Sophie A
Journal: Journal of equine veterinary science
Summary
# Editorial Summary: Serum Markers for Detecting Equine Hepatic Fibrosis Liver disease represents a significant clinical challenge in equine practice, yet definitive diagnosis currently relies on invasive liver biopsy—a costly procedure that limits its practical application. Potier and colleagues investigated whether the Enhanced Liver Fibrosis (ELF) test, validated in human medicine, could non-invasively detect hepatic fibrosis in horses, ponies, and donkeys by measuring serum hyaluronic acid (HA), procollagen III N-terminal peptide (PIIINP), and tissue inhibitor of metalloproteinase 1 (TIMP-1). Because TIMP-1 proved undetectable in most equine samples, the researchers developed a modified equid ELF (eELF) score using HA and PIIINP alone, comparing these markers against histopathological fibrosis scores in 20 diseased animals and 20 healthy controls. Both HA and the eELF score showed significant elevation in horses and ponies with fibrosis scores ≥2, with correlations also demonstrated in donkeys, whilst PIIINP alone was most useful in equids with advanced disease. These findings suggest serum HA and the eELF score could provide clinically valuable, non-invasive alternatives to biopsy for monitoring hepatic fibrosis progression, offering practitioners a practical tool for ongoing case management and prognostic assessment without repeated invasive sampling.
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Practical Takeaways
- •Blood tests measuring hyaluronic acid offer a non-invasive alternative to liver biopsy for detecting fibrosis in horses, ponies, and donkeys with suspected liver disease
- •The eELF score combining HA and PIIINP can help stage hepatic fibrosis severity and guide treatment decisions without subjecting patients to biopsy risks and costs
- •These serum markers could enable earlier detection and monitoring of liver disease progression, improving prognosis and treatment planning in equine practice
Key Findings
- •Serum hyaluronic acid (HA) and the novel eELF score were significantly elevated in horses and ponies with histopathologic fibrosis score ≥2 compared to those <2
- •HA and eELF showed significant correlation with fibrosis score in horses, ponies, and donkeys
- •TIMP-1 could not be reliably detected in most subjects, necessitating development of a two-marker eELF score based on HA and PIIINP
- •Serum HA and eELF score may serve as non-invasive alternatives to liver biopsy for predicting and monitoring hepatic fibrosis in equids