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Cystinuria: current concepts and future directions
Daniel J Castro Pereira1, Anton C Schoolwerth, Vernon M Pais
1Department of Medicine, Section of Nephrology and Hypertension, Dartmouth-Hitchcock Medical Center, and Department of Surgery, Section of Urology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA.
Clinical Nephrology
|February 17, 2015
Summary
Cystinuria is a rare genetic kidney stone disease caused by impaired amino acid transport. Current management focuses on hydration, urine alkalinization, and medication, with new treatments showing promise.
Area of Science:
- Nephrology
- Genetics
- Biochemistry
Background:
- Cystinuria is an autosomal recessive disorder affecting amino acid transport.
- It leads to the formation of cystine kidney stones due to cystine's low solubility.
- This condition impacts patient quality of life and renal function.
Purpose of the Study:
- To review the current understanding and management of cystinuria.
- To highlight challenges in treating cystine nephrolithiasis.
- To discuss emerging therapeutic strategies.
Main Methods:
- Literature review of cystinuria pathogenesis, classification, and treatment.
- Analysis of imaging characteristics for surgical planning.
- Evaluation of recent advances in crystal growth inhibition.
Main Results:
- Cystinuria impairs the transport of cystine, ornithine, lysine, and arginine.
- Cystine stones are resistant to fragmentation and require specific management.
- Current treatments include fluid/dietary changes, alkalinization, and thiol drugs.
Conclusions:
- Cystinuria, though uncommon, is a treatable cause of nephrolithiasis.
- Effective management requires a multi-faceted approach.
- Advances in crystal growth inhibition offer future therapeutic potential.
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