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Cystinosis: a review.

Mohamed A Elmonem1,2, Koenraad R Veys1, Neveen A Soliman3,4

  • 1Department of Pediatric Nephrology & Growth and Regeneration, University Hospitals Leuven & KU Leuven, UZ Herestraat 49-3000, Leuven, Belgium.

Orphanet Journal of Rare Diseases
|April 23, 2016
PubMed
Summary
This summary is machine-generated.

Cystinosis, a genetic disorder causing kidney failure in children, results from cystine buildup due to CTNS gene mutations. Current treatments manage symptoms but do not offer a cure, highlighting the need for further research.

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Area of Science:

  • Genetics
  • Pediatrics
  • Nephrology

Background:

  • Cystinosis is the leading inherited cause of Fanconi syndrome in children.
  • It's an autosomal recessive lysosomal storage disorder from CTNS gene mutations, impairing cystine export.
  • This leads to cystine accumulation in lysosomes across all body cells, primarily affecting the kidneys.

Purpose of the Study:

  • To review the clinical manifestations of cystinosis.
  • To evaluate current diagnostic and therapeutic strategies, including their pros and cons.
  • To identify key areas for future research in cystinosis.

Main Methods:

  • Literature review of cystinosis clinical features.
  • Analysis of diagnostic methods, focusing on leukocyte cystine assay.
  • Evaluation of existing treatments: cystine depletion, supportive therapies, and future research directions.

Main Results:

  • Kidney damage progresses from proximal tubular to glomerular, leading to end-stage renal failure if untreated.
  • Other organs affected include eyes, thyroid, pancreas, gonads, muscles, and CNS.
  • Leukocyte cystine assay is crucial for diagnosis and monitoring treatment efficacy.

Conclusions:

  • While treatments like cysteamine exist, no cure for cystinosis is currently available.
  • Effective management requires addressing multisystemic complications and monitoring cystine levels.
  • Further research is essential to develop curative therapies for this rare genetic disorder.