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[2,8-dihydroxyadenine nephrolithiasis: from diagnosis to therapy]
Annales De Biologie Clinique
|November 28, 2007
Summary
Adenine phosphoribosyltransferase (APRT) deficiency causes adenine accumulation, leading to kidney stones and failure. Early laboratory diagnosis and allopurinol therapy are crucial for preventing 2,8-dihydroxyadenine crystal formation.
Area of Science:
- Biochemistry
- Genetics
- Metabolic Disorders
Context:
- Adenine phosphoribosyltransferase (APRT) deficiency is an inherited purine metabolism disorder.
- It results from autosomal recessive inheritance, affecting adenine metabolism.
- Accumulation of adenine leads to 2,8-dihydroxyadenine (2,8-DHA) formation.
Purpose:
- To summarize the pathophysiology, diagnosis, and management of APRT deficiency.
- To highlight the role of laboratory diagnostics in identifying the condition and monitoring treatment.
- To discuss the clinical presentation and genetic variations of APRT deficiency.
Summary:
- APRT deficiency leads to adenine accumulation and 2,8-DHA excretion, causing kidney stones and renal failure.
- Diagnosis involves urine/stone analysis for 2,8-DHA crystals and erythrocyte enzyme activity assays.
- Two types of deficiency exist: Type I (undetectable activity) and Type II (reduced activity due to low affinity for PRPP).
Impact:
- Early detection through laboratory testing is vital for preventing renal damage.
- Allopurinol therapy can prevent 2,8-DHA crystallization and subsequent kidney issues.
- Understanding genetic variations aids in personalized diagnosis and management strategies.
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