Abstract

Beta-Thalassemia is a common autosomal recessive disorder resulting from over 200 different mutations of the beta-globin genes. In this study, the most prevalent beta globin gene mutations (-87 (C>G), -30 (T>A),Cd 5 (-CT), hemoglobin C (HbC), hemoglobin S (HbS), Cd 6 (-A),Cd 8 (-AA), Cd 8/9 (+G), Cd 22 (7bp del), Cd 30 (G>C), IVS 1.1 (G>A), IVS 1.2 (T>A), IVS 1.5 (G>C), IVS 1.6 (T>C), IVS 1.110 (G>A), IVS 1.116 (T>G), IVS 1-25 (25bp del), Cd 36/37 (-T), Cd 39 (C>T), Cd 44 (-C), IVS 2.1 (G>A), IVS 2.745 (C>G)) were analyzed for 38 cases referred to our department with the diagnosis of beta-thalassemia. Of these cases, 32 (84.2%) were identified with  beta globin gene mutation. Among those, 6 patients were found to be homozygote for beta globin gene mutations; 26 patients were heterozygous. According to our results; the IVS 1.110 (G>A) is the most frequent mutation type in our province the same as other geographical regions of Turkey. The most frequent mutations in heterozygous or homozygous patients were IVS 1.110 (G>A), IVS 1.1 (G>A), IVS 2.1 (G>A), Cd 8 ( -AA) and Cd 8/9 (+G), comprising 47.4%, 15.8% and 7.9% of the alleles, respectively. THA CD 44 (-C) mutation accounted for 5.3% of the alleles only and Cd 5 (-CT), Cd 22 (7 bp del) and Cd 39 (C>T) mutations were rarely determined.

In conclusion, our preliminary results show the heterogeneity of the beta-thalassemia mutations inMalatya.

Key Words: Beta-Thalassemia, Beta-Globin Gene, Mutation