Rare hemoglobin variant Hb Yaizu observed in Turkey

Area of Science:

• Hematology
• Molecular Biology
• Genetics

Background:

• Hemoglobin variants require precise identification for accurate diagnosis.
• Rare hemoglobin variants pose challenges in routine screening.

Purpose of the Study:

• To define the characteristic features of the rare Hemoglobin (Hb) Yaizu variant.
• To facilitate laboratory diagnosis of Hb Yaizu in screening programs.

Main Methods:

• Analysis of a family with Hb Yaizu using hemoglobin electrophoresis (alkaline and acid), HPLC, and DNA sequencing.
• Determination of beta globin gene cluster haplotypes.

Main Results:

• Hb Yaizu exhibited unique migration patterns on electrophoresis and a specific HPLC retention time.
• Heterozygous Hb Yaizu [beta 79(EF3) Asp>Asn] was confirmed via DNA sequencing.
• The mutation was associated with the Mediterranean haplotype I [+----++].

Conclusions:

• The study details the characteristics of Hb Yaizu, a rare hemoglobin variant.
• Hb Yaizu may be significant for hemoglobinopathy screening programs.
• The clinical significance of Hb Yaizu remains to be elucidated.