Influence of genetic polymorphisms and mutations in the cardiac pathology of iron overload in thalassemia and sickle cell anemia patients: a retrospective study

<p>Cardiac disease in thalassemia is determined by the accumulation of iron in the tissue. Genetic factors could influence the severity and the rapidity of the modifications of the cardiac tissue. Mutations or polymorphisms of genes have already been described as being implicated in cardiac disease. In particular, we studied the polymorphisms C1091T in the Connexin 37 gene (<em>CX 37</em>), 4G -668 5G in the Plasminogen Activator Inhibitor-1 gene (<em>PAI 1</em>) and 5A-1171 6A in the Stromelysin-1 gene (<em>SL</em>) in 193 randomly selected patients affected by hemoglobinopathies and 100 normal subjects randomly selected from the general population. A retrospective analysis based on history, clinical data and imaging studies was carried out to assess the presence and type of heart disease. The results of our study do not demonstrate a close association between polymorphism in these candidate genes and cardiac disease, and in particular with myocardial infarction in a cohort of Sicilian patients affected by hemoglobinopathies.</p><p>&nbsp;</p><p>地中海贫血心脏病的关键诱因是组织中的铁沉积。遗传因子可能影响心脏组织修复的严重程度和速度。基因突变或基因多态性与心脏病有关。尤其是，我们研究了193名随机选择的血红蛋白病患者以及从普通人群中随机选择的100名正常受试者的连接蛋白37基因（CX37）的C1091T、纤溶酶原激活物抑制剂-1基因（PAI1）的4G -668 5G 和基质分解素-1基因（SL）的5A-1171 6A等多态性。根据病史、临床资料和影像研究进行回顾性分析，以评估心脏病的存在情况和类型。我们的研究结果并没有表明这些候选基因的多态性和心脏疾病之间存在密切联系，尤其是与一组西西里岛血红蛋白病患者的心肌梗塞存在密切联系。