Hb Gibbon [β124(H2)Pro→Thr (HBB: c.373C>A, p.P125T)], an Asymptomatic Novel Hemoglobin Variant Detected by Newborn Screening

Abstract

We describe here a previously unreported hemoglobin (Hb) variant, Hb Gibbon [β124(H2)Pro→Thr (HBB: c.373C>A, p.P125T)] detected by newborn Hb screening in a term male with no family history for hemoglobinopathy or other screening abnormalities. This missense mutation produces a β-globin chain variant that was detected by high performance liquid chromatography (HPLC) methods, but is silent by capillary electrophoresis (CE). DNA sequencing studies revealed that his father was also a heterozygote for this mutation. Neither has abnormalities on complete blood count (CBC) or any symptomatology.

Keywords:

• Capillary electrophoresis (CE)
• hemoglobinopathy
• high performance liquid chromatography (HPLC)
• neonatal screening

Disclosure statement

J. B. Ford participated in an advisory board for Novartis (Basel, Switzerland) and received an honorarium. The other authors report no conflicts of interest. The authors alone are responsible for the content and writing of this article.