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Iranian Journal of Public Health، جلد ۴۹، شماره ۴، صفحات ۷۹۱-۷۹۹
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عنوان انگلیسی Haplotype Analysis in Carriers of β-globin Gene Mutation Facili-tates Genetic Counseling in β-thalassemia: A Cross-Sectional Study in Kerman Province, Iran
چکیده انگلیسی مقاله Background: β-thalassemia is characterized by reduced synthesis of the hemoglobin beta chain that results in microcytic hypochromic anemia and reduced amounts of hemoglobin A (HbA) on hemoglobin analysis. β-thalassemias are caused by mutations in the β-globin gene, inherited in an autosomal recessive manner. Determining molecular defects in couples carrying β-thalassemia is a prerequisite for prenatal diagnosis of the disease. In this regards, database of β-globin gene haplotypes facilitates mutation detection of the gene and helps genetic counselors to reach the goals of β-thalassemia prevention program. Methods: In this cross-sectional study, 255 couples attended genetic counseling between December 2017 and January 2019 in Afzalipour Hospital, Kerman University of Medical Scinces, Kerman, Iran as suspicious of β-thalassemia carriers. Furthermore, they were investigated using amplification refractory mutations system-polymerase chain reaction and restriction fragment length polymorphism methods for mutation screening and haplotype analysis of polymorphic sites in β-globin gene cluster, respectively. Results: We identified 20 different types of β-globin gene mutation in 449 β-thalassemia carriers. Analysis of the pattern of Hind III/Gγ, Hinf I/5′β, Hinc II/3′Ψβ, Rsa I/5′β, AvaII/β and Hind III/Aγ polymorphic sites in 257 alleles of informative families revealed 17 different haplotypes. Haplotype 1 (77.24%) showed strong linkage with the most common mutation IVSI-5 while haplotype 5 (66.67%) was associated with the second frequent mutation IVSII-1. Conclusion: To our knowledge, these β-globin haplotypes are reported for the first time which are different with those found in other parts of Iran. The current haplotypes pattern data makes the counseling of β-thalassemia carriers more straightforward and the process of mutation screening faster and more accurate.  
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نویسندگان مقاله | Nasrollah SALEH-GOHARI
1. Department of Medical Genetics, Kerman University of Medical Sciences, Kerman, Iran 2. Laboratory of Medical Genetics, Afzalipour Hospital, Kerman, Iran


| Kolsoum SAEIDI
Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran


| Sima ZIAADINI-DASHTKHAKI
Laboratory of Medical Genetics, Afzalipour Hospital, Kerman, Iran
نشانی اینترنتی http://ijph.tums.ac.ir/index.php/ijph/article/view/20173
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