Urinary excretion of uricine

Area of Science:

• Nephrology
• Urology
• Biochemistry

Background:

• Uric acid stones are a significant clinical problem.
• The role of pigments like uricine in uric acid stone formation is not fully understood.
• Uric acid's interaction with other urinary components influences its precipitation.

Purpose of the Study:

• To investigate the urinary excretion of uricine.
• To assess the potential binding of uricine by uric acid.
• To correlate these factors with different stone-forming populations.

Main Methods:

• Uricine quantification using ion exchange chromatography and fluorescence measurement.
• Determination of uricine-uric acid potential binding.
• Analysis in control subjects, uric acid stone formers, calcium stone formers, and gouty patients.

Main Results:

• Elevated uricine excretion was found in uric acid stone formers.
• Increased uricine-uric acid potential binding was observed in many uric acid stone formers.
• These alterations were not consistently seen in calcium stone formers or gouty patients.

Conclusions:

• Uricine excretion and its binding by uric acid may contribute to uric acid stone formation.
• These findings highlight uricine as a potential factor in the pathogenesis of uric acid urolithiasis.
• Further research is warranted to explore therapeutic strategies targeting uricine.