Abstract
Iron overload is the main cause of morbidity and mortality in β-thalassemia major patients, and cardiac iron overload is the most common reason for death in these transfusion-dependent patients. Hepcidin, a liver-derived peptide hormone, plays a key role in plasma iron levels regulation by controlling two main stages, digestive iron absorption in enterocytes, and iron recycling in macrophages. Although hepcidin is mainly secreted from hepatocytes in the liver, it is also synthesized from mononuclear cells consisting of monocytes and lymphocytes. Binding of this molecule to ferroportin, a specific cellular exporter of iron, leads to degradation of the ligand-receptor complex, which reduces the iron overload by lowering the amounts of iron released into the plasma. Likewise, the same mechanism has been proved to be true for lymphocyte-drived hepcidin. The expression levels of hepcidin mRNA were evaluated using quantitative real time PCR (qRT-PCR) in 50 β-thalassemia major patients, as well as 25 healthy volunteers as the group of control. There was a significantly positive correlation between the cardiac iron concentration, showed by higher T2 values, and hepcidin levels in the patients (p = 0.028; r = 0.311). However, hepcidin expression levels did not significantly correlate with ferritin and liver iron concentrations. Hepcidin can act as a beneficial marker to determine iron overload degrees, particularly in the heart, in β-thalassemia major patients and be used as a logical therapeutic agent for treatment of β-thalassemia disorders.
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Ayatollahi, H., Mousavi Nezhad, S.F., Talebpour, A. et al. Relation of hepcidin gene expression in blood mononuclear cells with iron overload severity among β-thalassemia major patients. Mol Biol Rep 47, 9353–9359 (2020). https://doi.org/10.1007/s11033-020-06012-2
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DOI: https://doi.org/10.1007/s11033-020-06012-2