Journal
PEDIATRIC PULMONOLOGY
Volume 52, Issue 10, Pages 1300-1305Publisher
WILEY
DOI: 10.1002/ppul.23774
Keywords
cystic fibrosis; cystic fibrosis transmembrane regulator; next generation sequencing
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Funding
- Diagnosticos da America S.A. (DASA), Sao Paulo, Brazil
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BackgroundAs of 2013, fewer than 20% of patients in the Brazilian CF Registry had two CFTR mutations identified. The aim of this study was to sequence the coding region of the CFTR in Brazilian CF patients and determine the frequency of mutations in this cohort. MethodsPatients with CF and those with suspected atypical CF or CFTR-related disorders were invited to enroll. Total DNA was extracted from blood samples, quantified, and purified. Library preparation was performed using Ion Xpress Plus gDNA and Amplicon Library preparation kits (Life Technologies), as well as sequencing using the Ion Torrent platform (Life Technologies). ResultsA total of 141 patients were enrolled, and 45 mutations were identified. Among 126 CF patients, we identified mutations in 97.2% of alleles. The three most common mutations were F508del, G542X, and 3120+1G->A. Five novel pathogenic mutations were also identified. ConclusionsNext generation sequencing (NGS) allowed the identification of mutations in most CF alleles and confirmed allelic heterogeneity in our population.
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