Novel mutations and deletions in cystic fibrosis in a tertiary cystic fibrosis center in Istanbul.

Abstract:

BACKGROUND:Cystic fibrosis (CF) genotyping has garnered increased attention since the discovery of the cystic fibrosis transmembrane conductance regulator (CFTR) gene in 1989 led to the identification of over 1700 mutations on chromosome 7. Yet, little is known about the genetic profile of CF patients in Turkey. This study sought to determine the mutation distribution among CF patients seeking care at Marmara University. METHODS:Two hundred fifty previously diagnosed CF patients were included in the study. CFTR gene exons 1 to 27 were amplified by a polymerase chain reaction and whole DNA sequencing was performed. Duplications and deletions were investigated by the multiplex ligation-dependent probe amplification (MLPA) technique in patients with one or two unidentified mutations in sequence analysis. RESULTS:CFTR mutation analysis revealed 80 mutations and five large deletions were present in our study population. The five most common mutations were (delta) F508 (c.1521-1523delCTT) (28.4%), 1677delTA (c.1545-1546delTA) (6.4%), 2789 + 5G- > A (c.2657 + 5G > A) (5.8%), N1303K (c.3909C > G) (2.4%), and c.2183AA- > G (c.2051-2052delAAinsG) (4.0%). Large deletions were found in 16 patients. Four novel mutations and two novel deletions were detected in this study. CONCLUSIONS:We have identified four novel mutations and two novel deletions using next-generation DNA sequencing and the MLPA technique and obtained an overall mutation detection rate of 91.4%. Detection of novel variants in CF patients will assist in genetic counseling and in determining appropriate patients for new therapies.

journal_name

Pediatr Pulmonol

journal_title

Pediatric pulmonology

authors

Atag E,Bas Ikizoglu N,Ergenekon AP,Gokdemir Y,Eralp EE,Ata P,Ersu R,Karakoc F,Karadag B

doi

10.1002/ppul.24299

subject

Has Abstract

pub_date

2019-06-01 00:00:00

pages

743-750

issue

6

eissn

8755-6863

issn

1099-0496

journal_volume

54

pub_type

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