Molecular Spectrum of β-Thalassemia Mutations in Central to Eastern Thailand. (4th March 2021)

• Record Type: Journal Article
• Authors: Panichchob, Prapaporn; Iamdeelert, Pooncharus; Wongsariya, Putita; Wongsariya, Pitchaya; Wongwattanasanti, Pinnaree; Tepakhan, Wanicha; Jomoui, Wittaya
• Is Part Of: Hemoglobin. Volume 45:Number 2(2021)
• Page Start: 97
• Page End: 102
• Publication Date: 2021-03-04
• Subjects: β-Thalassemia (β-thal -- ) -- Eastern Thailand -- genetic disorder -- Nakhon Nayok; Hemoglobinopathy -- Periodicals; Hemoglobin -- Periodicals; Hematology -- Periodicals; Thalassemia -- Periodicals; Blood -- Diseases -- Periodicals; 612.1111
• DOI: 10.1080/03630269.2021.1924193
• Languages: English
• ISSNs: 0363-0269

Abstract

Abstract: The aim of this study was to determine the molecular spectrum of β-thalassemia (β-thal) mutations in eastern Thailand. We identified β-thal mutations using allele specific-polymerase chain reaction (ASPCR) and direct DNA sequencing. We found 18 different β-thal mutations in a total of 191 unrelated subjects. Six common β-thal mutations comprised 86.91% of all the mutations, including codons 41/42 (–TTCT) ( HBB : c.126_129delCTTT) (35.60%), codon 17 (A>T) ( HBB : c.52A>T) (18.85%), −28 (A>G) ( HBB : c.-78A>G) (15.71%), IVS-II-654 (C>T) ( HBB : c.316-197C>T) (6.28%), IVS-I-1 (G>T) ( HBB : c.92+1G>T) (5.76%) and codon 19 (A>G) ( HBB :(c.59A>G) (4.71%). In addition, a novel 60 kb deletion in two unrelated cases was characterized and initially suspected to originate from eastern Thailand. Moreover, we demonstrated the molecular spectrum of recent β-thal mutations in Thailand, and data from this study were compared with five reference laboratory centers in Thailand. This study is the first to identify the comprehensive molecular spectrum of β-thal mutations in eastern Thailand, information that may be essential for screening, genetic counseling and prenatal diagnosis (PND) in this region.