Distribution of β-Thalassemia Mutations in the Northern Provinces of Iran

β-Thalassemia (thal) is one of the most common autosomal recessive disorders in Iran. There are more than two million carriers of β-thal and over 15,000 people affected with β-thal major who live in Iran. Prevalent mutations were identified by examining genomic DNAs isolated from 392 blood samples o...

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Bibliographic Details
Published in:Hemoglobin 2007-01, Vol.31 (3), p.351-356
Main Authors: Derakhshandeh-Peykar, Pupak, Akhavan-Niaki, Haleh, Tamaddoni, Ahmad, Ghawidel-Parsa, Shohreh, Holakouie Naieni, Kourosh, Rahmani, Manijeh, Babrzadeh, Farbod, Dilmaghani-Zadeh, Mohammad, Daneshvar Farhud, Dariush
Format: Article
Language:English
Subjects:
beta-Thalassemia - genetics
DNA Mutational Analysis
Female
Frameshift Mutation
Gene Frequency
Humans
Iran
Male
Molecular Epidemiology
Mutation
Point Mutation
Pregnancy
Reverse dot-blot
Sequence Deletion
β-Globin mutation
β-Thalassemia (thal)
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Summary:β-Thalassemia (thal) is one of the most common autosomal recessive disorders in Iran. There are more than two million carriers of β-thal and over 15,000 people affected with β-thal major who live in Iran. Prevalent mutations were identified by examining genomic DNAs isolated from 392 blood samples of β-thal carriers from three northern provinces of Iran. Furthermore, 172 pregnant women were analyzed from the 196 couples who requested pregnant diagnosis for β-thal. Allele identification was carried out using routine reverse dot-blot, amplification refractory mutation system (ARMS), and genomic sequencing. The most common mutation, IVS-II-1 (G→A), is followed, in order of frequency, by codon 30 (G→C), frameshift codons (FSC) 8,9 (+G), FSC 22 23 24 (−AAGTTGG), IVS-I-110 (G→A), IVS-I-5 (G→C), IVS-II-745 (C→G), IVS-I-2 (T→C), FSC 8 (−AA), IVS-I,3′-end (−25 bp), IVS-I-1 (G→A), FSC 36 37 (−T), IVS-I-6 (T→C), FSC 5 (−CT), −28 (A→C), codon 37 (G→A), IVS-II-2,3 (+11 −2), −30 (T→A), and −88 (C→A). We have also revealed the existence of five new mutations from northern Iran, one of which (codon 37) is the first reported for Iran. Furthermore, the rate of unknown mutations is significantly reduced in our study (about 6%). These results could help with establishing a center for prenatal diagnosis, prevention, and control of thalassemia in the northern provinces of Iran.
ISSN:0363-0269
1532-432X
DOI:10.1080/03630260701462030