Characterization of Two Novel Deletions Involving the 5′ Region of the β-Globin Gene Academic Article uri icon

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  • We report two novel β-thalassemia (β-thal) deletions involving the 5' region of the β-globin gene (HBB). The first deletion spans 538 bp and removes the β-globin promoter, 5' untranslated region (5'UTR) and most of exon 1. This deletion was identified in a 3-year-old Vietnamese boy with non transfusion dependent Hb E (HBB: c.79G>A)/β0-thal. The second deletion spans 1517 bp and removes the β-globin gene promoter, 5'UTR, and exons 1 and 2. This deletion was identified in two unrelated adults of European descent who had β-thal trait with unusually high Hb A2 levels. Deletions such as these are generally associated with higher levels of Hb A2 and Hb F than typical β-thal alleles, which may ameliorate the severity of the disease.


  • Waye, John
  • Hanna, Meredith
  • Hohenadel, Betty-Ann
  • Nakamura, Lisa
  • Walker, Lynda
  • Eng, Barry

publication date

  • November 2, 2017