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Abstract
Hemoglobin (Hb) J-Buda [α61(E10)Lys→Asn, AAG>AAT] is a very rare α-chain variant found in South-East Asia. We analyzed hematological parameters and provided a rapid molecular analysis method for detection of this hemoglobinopathy in two Thai women who had severe microcytic anemia with Hb and MCV <70g/L and 80fL, respectively. The HPLC revealed an abnormal Hb peak eluted ahead of HbA at retention time of 1.91-1.98min. On CE, the abnormal Hb peak was observed at the electrophoretic zone 12 which corresponded to Hb Bart's. The DNA sequencing revealed the AAG→AAT mutation at codon 61 for Hb J-Buda on one allele of the α1-globin gene. The developed Allele-specific PCR (ASPCR) showed the 455 bp amplified fragment from Hb J-Buda allele. Thus, understanding of hematological characterizations and the developed ASPCR for diagnosis of Hb J-Buda are essential for genetic counseling of this hemoglobinopathy.
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