Serum bile acid concentrations, histopathological features, and short-, and long-term survival in horses with hepatic disease.

The study shows that serum bile acid concentrations, histopathology scores and findings, play significant roles in determining the survival outcomes of horses with liver diseases. Higher concentrations of these factors are associated with greater inflammation and fibrosis, indicating impaired hepatic function.

Research Methodology

• The study is a retrospective cohort study conducted on the records of horses with liver disease diagnosed through a biopsy, from 1999 to 2011, and concurrent measurements of Serum Bile Acid (SBA).
• The collected biopsies were examined for a number of factors: the type and distribution of inflammatory cell infiltration, fibrosis, irreversible cytopathology affecting hepatocytes, hemosiderin or other pigment deposition, and bile duct proliferation.
• The SBA, histopathological findings and histological score were then compared between short-term survivors (those who survived to discharge) and long-term survivors (those who survived beyond 6 months).

Results of the Study

• Out of 81 cases, 90% survived short-term and 83% survived long-term.
• The study found associations between SBA and both short-term and long-term survivability (P=.009; P=.006). Other factors such as overall and parenchymal inflammation, portal and bridging fibrosis, apoptosis or single cell necrosis, hemosiderin deposition in hepatocytes, biliary, vascular and endothelial hyperplasia, nucleic changes, and the histopathological score were also associated with survival outcomes.
• SBA concentrations were found to significantly and positively correlated with overall, parenchymal, and portal inflammation as well as portal and bridging fibrosis.

Conclusions

• The research concluded that SBA, histopathological scores, and findings vary substantially between survivors and non-survivors of hepatic disease in horses.
• SBA concentrations have a significant correlation with inflammation and fibrosis, hinting towards interference with normal liver function.
• A histopathological score higher than 2 and, to a lesser extent, an SBA concentration higher than 20 μmol/L were found to be specific, but not sensitive indicators of non-survival.