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β-Globin chain abnormalities with coexisting α-thalassemia mutations.
Birol Guvenc1, Abdullah Canataroglu, Cagatay Unsal
1Department of Hematology, Faculty of Medicine, Cukurova University, Adana, Turkey ; Hemapheresis, Stem Cell and Cryopreservation Unit, Cukurova University, Balcali Hospital, Adana, Turkey ; Seyhan Hereditary Blood Disorders Center, Adana, Turkey.
Archives of Medical Science : AMS
|October 12, 2012
Summary
This study identified coexisting alpha- and beta-globin gene mutations in Adana, Turkey, revealing common sickle cell trait with alpha-thalassemia. These findings are crucial for prenatal diagnosis and premarital screening in high-risk populations.
Area of Science:
- Medical Genetics
- Hematology
- Molecular Biology
Background:
- Hemoglobinopathies remain prevalent in Adana, Turkey.
- Complex hemoglobinopathies arise from concomitant mutations in alpha- and beta-globin genes.
- Accurate diagnosis is vital, especially for prenatal screening.
Purpose of the Study:
- To identify concurrent mutations in alpha- and beta-globin genes.
- To develop targeted management plans for complex hemoglobinopathies.
- To inform prenatal diagnostic strategies.
Main Methods:
- Studied the association between beta-globin gene and alpha-thalassemia genotypes.
- Employed reverse hybridization for molecular analysis.
- Confirmed results using amplification refractory mutation system (ARMS) or restriction fragment length polymorphism (RFLP).
Main Results:
- Evaluated 36 adults with combined alpha- and beta-globin gene mutations.
- -alpha(3.7)/alpha alpha deletion was the most frequent alpha-chain defect.
- 25 cases showed sickle cell trait with coexisting alpha-thalassemia; 7 Hb S/S patients had concurrent alpha-gene mutations.
Conclusions:
- Coexisting alpha-globin mutations should be investigated in screening programs for sickle cell disease or beta-thalassemia trait.
- Premarital screening is particularly important in populations with high hemoglobinopathy frequencies.
- This approach aids in managing complex hemoglobinopathies and informing genetic counseling.
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