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[Diagnostic aspects of familial juvenile hyperuriceamic nephropathy]
B Stibůrková1, I Sebesta, S Kmoch
1Ustav dĕdicných metabolických poruch 1. LF UK, Praha. blanka.stiburkova@centrum.cz
Insights
Familial juvenile hyperuricemic nephropathy (FJHN) is a genetic kidney disease. Diagnosis in Czech families involved biochemical tests and DNA analysis, confirming FJHN in 20 patients.
Area of Science:
- Genetics
- Nephrology
- Biochemistry
Context:
- Familial juvenile hyperuricemic nephropathy (FJHN) is an autosomal dominant genetic disorder.
- FJHN is characterized by hyperuricemia, gout, and progressive renal disease.
- This study focuses on the Czech population, detailing clinical and biochemical findings.
Purpose:
- To characterize FJHN in a Czech cohort.
- To establish and confirm diagnoses in affected families.
- To investigate the genetic and biochemical basis of FJHN.
Summary:
- Three Czech families with FJHN were analyzed, involving 57 members.
- Biochemical investigations included uric acid, creatinine, and uric acid excretion fraction.
- FJHN was diagnosed in 19 patients based on biochemical results and one via linkage analysis.
Impact:
- Highlights the diagnostic challenges of FJHN due to its heterogeneity and limited molecular analysis availability.
- Emphasizes the importance of detailed purine metabolic investigations and family history for early diagnosis.
- Provides crucial data on FJHN in the Czech population, aiding future research and clinical management.
Unlabelled:
BACKGROUND; Familial juvenile hyperuricemic nephropathy (FJHN) is a genetic disorder with the autosomal dominant mode of hereditability; characterized with hyperuricemia, gout and progressive renal disease. Characterization of the disease together with clinical and biochemical findings in patients of Czech population is described.
Methods And Results:
The bloodlines of three Czech families with FJHN were set up on the basis of their family history. The specimens of blood and urine were taken from 57 family members for biochemical investigations and isolations of genomic DNA. Blood and urinary concentrations of the uric acid and creatinine together with values of excretion fraction of uric acid and Kaufman's index were determined. Based on these results diagnosis of FJHN was established or confirmed in 19 patients. One additional patient was diagnosed on the results of linkage analysis.
Conclusions:
FJHN is a disorder sharing non-specific clinical and biochemical signs with the group of familial renal disorders. The effective diagnosis is difficult due to the heterogeneity of the disorder and limited availability of molecular genetic analysis. Detailed purine metabolic investigation together with precise family history is thus necessary and very important in family members with hyperuricemia and/or gout (particularly in childhood or young women) as well as in patients with familial renal disease.
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