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Treatment of cystinosis with cysteamine. A pilot study determining dose and form of application

E Bergonzi, A Herren, P Lavanchy

    Helvetica Paediatrica Acta
    |November 1, 1981
    PubMed

    Insights

    Cysteamine treatment for nephropathic cystinosis in children shows promise. Gelatin capsules are an effective delivery method, with 50 mg/kg/day normalizing leukocyte cystine levels without side effects.

    Area of Science:

    • Pediatric Nephrology
    • Medical Biochemistry

    Background:

    • Nephropathic cystinosis is a rare genetic disorder characterized by lysosomal accumulation of cystine.
    • Current treatments focus on managing complications and slowing disease progression.

    Observation:

    • A pilot study evaluated cysteamine treatment in three children with nephropathic cystinosis, two of whom had undergone renal transplantation.
    • The study aimed to identify a practical application form and effective dosage for cysteamine therapy.

    Findings:

    • Cysteamine in gelatin capsules with silicic acid was the most acceptable formulation compared to syrup or suppositories.
    • A dosage of 50 mg/kg/day effectively reduced leukocyte cystine content, indicating therapeutic efficacy.
    • No adverse side effects were observed, even at higher doses (90 mg/kg/day).

    Implications:

    • This study suggests a viable and well-tolerated cysteamine treatment regimen for nephropathic cystinosis.
    • Further research is needed to confirm its long-term efficacy in preventing disease progression, particularly in transplanted patients or pre-symptomatic infants.

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