Novel truncating mutations in the CFTR gene causing a severe form of cystic fibrosis in Italian patients

S. Lenarduzzi, M. Morgutti, S. Crovella, A. Coiana, M. C. Rosatelli

Research output: Contribution to journalArticlepeer-review

Abstract

Cystic fibrosis (CF) is a common recessive genetic disease caused by mutations in the gene encoding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. More than 1800 different mutations have been described to date. Here, we report 3 novel mutations in CFTR in 3 Italian CF patients. To detect and identify 36 frequent mutations in Caucasians, we used the INNO-LiPA CFTR19 and INNO-LiPA CFTR17+Tn Update kits (Innogenetics; Ghent, Belgium). Our first analysis did not reveal both of the responsible mutations; thus, direct sequencing of the CFTR gene coding region was performed. The 3 patients were compound heterozygous. In one allele, the F508del (c.1521_1523delCTT, p.PHE508del) mutation in exon 11 was observed in each case. For the second allele, in patient No.1, direct sequencing revealed an 11-base pair deletion (GAGGCGATACT) in exon 14 (c.2236_2246del; pGlu746Alafs*29). In patient No. 2, direct sequencing revealed a nonsense mutation at nucleotide 3892 (c.3892G>T) in exon 24. In patient No. 3, direct sequencing revealed a deletion of cytosine in exon 27 (c.4296delC; p.Asn1432Lysfs*16). These 3 novel mutations indicate the production of a truncated protein, which consequently results in a non-functional polypeptide.

Original languageEnglish
Pages (from-to)9636-9641
Number of pages6
JournalGenetics and Molecular Research
Volume13
Issue number4
DOIs
Publication statusPublished - Nov 14 2014

Keywords

  • Cystic fibrosis
  • Novel mutation
  • Pancreatic insufficiency
  • Severe mutations

ASJC Scopus subject areas

  • Genetics
  • Molecular Biology
  • Medicine(all)

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