Abstract
Available and flexible choice of methods for screening and detecting β-thalassemia (β-thal) can promote control of thalassemia in developing countries. In this study, two methods, the amplification refractory mutation system-polymerase chain reaction (ARMS-PCR) and reverse dot-blot hybridization assays were developed to detect common β-thal mutations in 244 thalassemia patients and 152 healthy people in North Vietnam. The most common mutation was codon 26 (G>A), also known as Hb E (HBB: c.79G>A), accounting for 26.4% of the total studied chromosomes, followed by codons 41/42 (-TCTT) (HBB: c.126_129delCTTT) and codon 17 (A>T) (HBB: c.c.52A>T), accounting for 19.4 and 16.4%, respectively. In addition, codon 95 (+A) (HBB: c.c.287_288insA) that is known as the Vietnamese mutation, accounted for 0.6%. Moreover, the heterozygous state of the four mutations was also found in healthy people, of which Hb E was again the most common mutation with a frequency 3.0%. The results of this study provide available methods and indicative data for preventive and control strategies concerning the genetic diagnosis of thalassemia.
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