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First report on the co-inheritance of beta-globin IVS-I-5 (G-->C) thalassemia with delta globin CD12 {Asn-->Lys (AAT-->AAA)}HbA₂-NYU in Iran.

Abstract : BACKGROUND: Co-inheritance of β- and δ-globin mutations in Iran is not uncommon. This situation may interfere with correct diagnosis and genetic counseling of α- and β-thalassemia in screening programs. Here we report the co-inheritance of β- and δ-globin gene mutations in an individual with microcytosis, hypochromia and a normal hemoglobin A₂ (HbA₂) level. METHODS: Genomic DNA extraction, amplification refractory mutation system (ARMS) polymerase chain reaction and direct DNA sequencing of δ- and β-globin genes were exploited for detection of the mutations in these two genes in an individual with low hematological indices and normal HbA₂. RESULTS: ARMS-PCR technique revealed the β(+) IVSI-5 (G to C) mutation and direct DNA sequencing of the δ-globin gene detected a previously reported delta codon 12 (AAT-->AAA) HbA2-NYU. This study reports HbA2-NYU in association with the β IVSI-5 (G to C) mutation in Iran. DISCUSSION: This report emphasizes that normal HbA₂ expression in a β-goblin carrier is due to mutation in the δ-globin gene and may cause misdiagnosis of thalassemia.
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Submitted on : Saturday, June 1, 2013 - 9:11:09 AM
Last modification on : Wednesday, September 23, 2020 - 10:48:02 AM
Long-term archiving on: : Monday, September 2, 2013 - 2:55:10 AM

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Azam Amirian, Morteza Karimipoor, Masoumeh Jafarinejad, Maryam Taghavi, Alireza Kordafshari, et al.. First report on the co-inheritance of beta-globin IVS-I-5 (G-->C) thalassemia with delta globin CD12 {Asn-->Lys (AAT-->AAA)}HbA₂-NYU in Iran.. Archives of Iranian Medicine, Academy of Medical Sciences of the I.R. Iran, 2011, 14 (1), pp.8-11. ⟨pasteur-00829009⟩

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