Poly thymidine polymorphism and cystic fibrosis in a non-Caucasian population.

Abstract:

BACKGROUND:Cystic fibrosis is a monogenic recessive disorder found predominantly in Caucasian population. This disease arises from mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene. In this study we consider poly T polymorphism c.1210-12T[5], c.1210-12T[7], c.1210-12T[9] (T{5}, T{7}, T{9}) in the intron 8 of CFTR gene in normal individuals and cystic fibrosis patients in the north of Iran. MATERIAL AND METHODS:40 CF patients and 40 normal individuals were screened for poly T polymorphism in intron 8 of CFTR gene using Reverse Dot Blot method which was also used to detect p.Phe508del among CF patients. RESULTS:T{7} allele is the most prevalent in both normal and CF patients. Its abundance is approximately 75%. T{9} and T{5} represent approximately 20% and 5% of alleles respectively. T{7}/T{7} genotype is the most present in both normal and CF patients with 72.5% and 60% prevalence respectively. p.Phe508del was present in 13 CFTR alleles belonging to 7 patients with either homozygote T{9}/ T{9}, T{7}/ T{7} or compound heterozygote T{7}/ T{9} genotypes. CONCLUSION:Contrary to the Caucasians, T{7} allele is more frequent in Northern Iranian CF patients. The presence of p.Phe508del and T{7} allele in the same framework is reported for the first time in this part of the world. Further investigations of other populations will help to understand whether p.Phe508del arose by selection pressure in this part of the world or was imported from European countries. The abundance of T{5}, T{7}, T{9} alleles indicates that this polymorphism can be used as one of the informative markers for detection of normal and mutant alleles in prenatal diagnosis or carrier assessment in families with previous history of the disease in regions with high degree of CFTR mutation heterogeneity.

journal_name

Dis Markers

journal_title

Disease markers

authors

Tabaripour R,Niaki HA,Douki MR,Bazzaz JT,Larijani B,Yaghmaei P

doi

10.3233/DMA-2011-0880

subject

Has Abstract

pub_date

2012-01-01 00:00:00

pages

241-6

issue

4

eissn

0278-0240

issn

1875-8630

pii

6278227G2QW70187

journal_volume

32

pub_type

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