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CFTR gene mutations in sarcoidosis.
Manfred Schürmann1, Melanie Albrecht, Eberhard Schwinger
1Institute of Human Genetics, Medical University Lübeck, Lübeck, Germany.
European Journal of Human Genetics : EJHG
|October 31, 2002
Summary
Genetic testing for cystic fibrosis transmembrane conductance regulator (CFTR) mutations did not reveal a significant link to sarcoidosis in German families. These findings do not support CFTR mutations as a major factor in sarcoidosis development.
Area of Science:
- Genetics
- Immunology
- Pulmonology
Background:
- Sarcoidosis is a multisystem granulomatous inflammatory disease.
- Genetic factors are implicated in sarcoidosis pathogenesis.
- Previous Italian studies suggested a link between CFTR gene mutations and sarcoidosis.
Purpose of the Study:
- To investigate the association and linkage of CFTR gene mutations with sarcoidosis in German families.
- To evaluate the role of CFTR mutations in the pathogenesis of sarcoidosis.
Main Methods:
- Genotyping of the CFTR gene mutation R75Q in 63 families with multiple affected siblings.
- Screening for 34 functional CFTR mutations in 54 patients from 25 families.
- Statistical analysis to assess association and linkage (P values provided).
Main Results:
- The CFTR R75Q mutation was present in seven families but showed no association (P=0.5) or linkage (P=0.54) to sarcoidosis.
- Excluding the deltaF508 mutation, no other CFTR mutations were found in the screened patient subset.
- The deltaF508 mutation was present in three patients and absent in one patient from two families.
Conclusions:
- The study does not support the hypothesis that CFTR mutations play a significant role in the pathogenesis of sarcoidosis.
- The genetic contribution of CFTR mutations to sarcoidosis appears minimal in the studied population.