Related Experiment Videos
Pulmonary dysfunction in adults with nephropathic cystinosis
Y Anikster1, F Lacbawan, M Brantly
1Section on Human Biochemical Genetics, Heritable Disorders Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA.
Chest
|February 15, 2001
Summary
Nephropathic cystinosis causes restrictive lung disease in adults due to distal myopathy, impacting inspiratory and expiratory function. Long-term cystine depletion therapy may prevent this complication.
Area of Science:
- Pulmonary Medicine
- Nephrology
- Genetics
Background:
- Nephropathic cystinosis is a rare genetic disorder.
- Pulmonary complications are not well-characterized in adult patients post-renal transplantation.
- Distal myopathy is a known manifestation of advanced cystinosis.
Purpose of the Study:
- To investigate and define the pattern of pulmonary dysfunction in adult patients with nephropathic cystinosis after renal transplantation.
- To explore the relationship between myopathy and lung function in this population.
Main Methods:
- Cross-sectional analysis of 12 adult nephropathic cystinosis patients and 3 adult non-nephropathic cystinosis patients.
- Pulmonary function tests including FVC, FEV(1), TLC, MIP, and MEP were performed.
- Chest radiographs and CT scans were utilized to assess lung parenchyma.
Main Results:
- Nephropathic cystinosis patients exhibited extraparenchymal restrictive lung disease with significant inspiratory and expiratory dysfunction (mean FVC 58%, FEV(1) 57%, TLC 66%).
- Maximal respiratory pressures were markedly reduced (MIP 40%, MEP 26% of predicted).
- Pulmonary disease severity correlated with the severity of distal myopathy; lung parenchyma remained normal.
Conclusions:
- Distal myopathy in nephropathic cystinosis leads to extraparenchymal restrictive lung disease in adults.
- The efficacy of oral cysteamine therapy in preventing pulmonary complications requires further investigation.