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Cystic fibrosis: the delta F508 mutation does not lead to an exceptionally severe phenotype. A cohort study

G Borgo1, P Gasparini, A Bonizzato

  • 1Centro Regionale Veneto Fibrosi Cistica, Ospedale Civile Maggiore, Verona, Italy.

European Journal of Pediatrics
|December 1, 1993
PubMed

Insights

The delta F508 mutation in cystic fibrosis (CF) does not appear to affect lung or nutritional status in children aged 8.5-10 years. This finding suggests genotype-phenotype correlations in CF may not be evident at this early age.

Area of Science:

  • Genetics
  • Pediatrics
  • Pulmonology

Background:

  • Cystic Fibrosis (CF) is a genetic disorder affecting multiple organs.
  • Understanding genotype-phenotype relationships is crucial for predicting disease progression and tailoring treatments.
  • The delta F508 mutation is the most common CF-causing mutation worldwide.

Purpose of the Study:

  • To investigate the relationship between specific genotypes and the clinical presentation of cystic fibrosis.
  • To assess pulmonary and nutritional status in relation to the delta F508 mutation in young CF patients.

Main Methods:

  • A cohort of 123 pediatric cystic fibrosis patients (aged 8.5-10 years) with known genotypes was studied.
  • Patients were followed at a single center with standardized diagnostic and treatment protocols.
  • Pulmonary function and nutritional markers were assessed and compared across different genotype groups.

Main Results:

  • No significant differences in pulmonary status or nutritional deficiencies were observed between patients homozygous for the delta F508 mutation and those with other genotypes (compound heterozygotes or unspecified).
  • Wide variability in pulmonary manifestations was noted across all genotype groups.
  • A potential slight increase in mortality among delta F508 homozygotes was considered coincidental given the sample size.

Conclusions:

  • In children with cystic fibrosis up to age 10, the severity of lung disease and nutritional status is not directly correlated with the delta F508 mutation.
  • Early-onset genotype-phenotype correlations in cystic fibrosis may be less pronounced than previously thought or influenced by other factors.

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