The Effect of Five Single Nucleotide Polymorphisms on Hb F Variation of β-Thalassemia Traits and Hematologically Normal Individuals in Southeast Turkey.

Hemoglobin
Ahmet GencEyyup Rencuzogullari

Abstract

β-Thalassemia (β-thal) is caused by deficiency of β-globin chain synthesis and leads to the accumulation of unstable globin chain production. This results in a higher Hb F level in order to neutralize the excess α chains. In addition, γ-globin gene expression, due to genetic factors after birth, leads to increased Hb F levels in adulthood [hereditary persistence of fetal hemoglobin (Hb) (HPFH)]. In this study, the relationship between β-thal trait and individuals with suspected HPFH and a control group was investigated in Adıyaman, Turkey. Single nucleotide polymorphism (SNP) analyses were performed in five different polymorphic regions using real-time polymerase chain reaction (qPCR) methods [rs4671393 (G>A), rs766432 (A>C), rs9402686 (G>A), rs28384513 (T>G), rs1609812 (A>G)]. No significant difference was found between the control and β-thal group in the codominant inheritance model in the rs1609812 (A>G) polymorphism region only, while all the other polymorphic regions were found to be statistically significant. It was found that different genotype models increased Hb F levels between 1.6- and 3.06-fold in four studied polymorphic regions [rs4671393 (G>A), rs766432 (A>C), rs9402686 (G>A), rs28384513 (T>G)]. All of the polymo...Continue Reading

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