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Hemoglobin
international journal for hemoglobin research
Volume 26, 2002 - Issue 3
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Original

Hb Paksé [(α2) CODON 142 (TA A→TA T OR Term→Tyr)] IN THAI PATIENTS WITH EABart's DISEASE AND Hb H DISEASE

, &
Pages 227-235 | Received 26 Dec 2001, Accepted 13 Feb 2002, Published online: 07 Jul 2009
 

Abstract

Hb Paksé is caused by an α2-globin gene termination codon mutation, TA A→TA T or Term→Tyr, initially described in a Laotian family. We now report for the first time that the same mutation has been found in 14 Thai patients, seven with EABart's disease, four with Hb H disease, and three with α-thalassemia trait who were initially diagnosed as having Hb Constant Spring (Hb CS; α2-globin gene termination codon mutation T AA→C AA or Term→Gln). Co-inheritance of this mutation with α-thalassemia-1 (SEA type) leads to Hb H disease (hereafter designated as Hb H-Paksé disease) and to a complex thalassemia syndrome, namely EABart's-Paksé disease. Hematological data of these patients were compared with those of classical Hb H-CS and the EABart's patients. To facilitate epidemiological and diagnostic screening of Hb Paksé, a simple assay procedure based on allele specific polymerase chain reaction (PCR) amplifications was developed and validated. Using this allele specific PCR as a screening method, five additional individuals with Hb Paksé were found among 71 Thai subjects previously thought to have Hb CS.

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