Serum xanthine oxidase in jaundice

Area of Science:

• Biochemistry
• Hepatology
• Clinical Diagnostics

Background:

• Jaundice can result from various etiologies, necessitating accurate diagnostic markers.
• Hepatocellular damage assessment is crucial for timely and effective treatment.

Purpose of the Study:

• To evaluate serum xanthine oxidase activity as a potential biomarker for acute hepatocellular damage.
• To compare the diagnostic sensitivity and specificity of serum xanthine oxidase with existing liver enzymes.

Main Methods:

• Serum xanthine oxidase activity was quantified using a radiochemical method.
• Patient cohorts included individuals with jaundice of diverse origins and non-jaundiced controls.
• Enzyme activity was correlated with clinical diagnoses and compared to serum glutamic-oxaloacetic transaminase and lactate dehydrogenase levels.

Main Results:

• Markedly elevated serum xanthine oxidase activity (up to 50-fold increase) was detected in 32 of 34 patients with infectious hepatitis.
• Slight elevations were observed in patients with extrahepatic obstructive jaundice and chronic renal failure.
• Serum xanthine oxidase demonstrated higher sensitivity and specificity for acute hepatocellular damage compared to other tested enzymes.

Conclusions:

• Serum xanthine oxidase is a highly sensitive and specific indicator of acute hepatocellular damage, particularly in infectious hepatitis.
• This enzyme activity may serve as a valuable diagnostic tool for liver injury.
• Further research can explore its utility in differentiating causes of jaundice.