Active clinical trials for "Iron Overload"

Despite continuing advances in iron chelation therapy, iron toxicity of endocrine glands, particularly the pituitary gland, remains common in patients with transfusion dependent anemias. We would like to establish accurate population norms of pituitary R2 and volume and understand the progression of pituitary iron in transfused patients on Deferasirox.

Iron overload is well study in Thalassemia patients and it's not only related to blood transfusions, since intestinal iron absorption is also increased in those patients. Sickle cell patients didn't developed significant clinical symptoms and signs of iron overload in spite frequent transfusions. The purpose of this study is to assess the iron overload in Sickle cell anemia and Sickle cell Thalassemia patients using clinical parameters and laboratory studies including Non Transferrin Binding Iron, Labile Iron and Hepcidin, in order to determine the cardiac and liver iron.

Thalassemia Major patients developed Iron Overload due to blood transfusions and intestinal iron absorption. Renal function caused by Iron overload was studied in a previous study and shows principally tubular disfunction. In this previous study the Iron chelator used was Deferrioxamine. In the last five years an oral Iron chelator was introduced and approved by the FDA, Deferasirox, (Novartis, Switzerland and USA). The purpose of this study is to assess the renal function in Thalassemia Major patients treated with this new oral iron chelator and compare the results with our previous study.

Recent retrospective studies have suggested that iron overload is a clinically important problem in patients undergoing ablative stem cell transplantation. However, these studies relied on serum ferritin as a surrogate of iron overload, which limits the conclusions that can be drawn from such analyses. Therefore, the investigators are conducting a prospective study to more rigorously examine the prevalence, mechanisms, and consequences of iron overload in this patient population.

The investigators' primary objective is to study prevalences of myocardial iron overload, defined as a cardiac T2*< 20 ms, in 3 populations of multiply transfused patients, affected with thalassemia, sickle cell disease, and myelodysplasia.

Red cell transfusions are an important part of supportive cancer therapy. The iron in the transfused blood may build up in the body since the human body has no way to get rid of extra iron. Iron tends to build up in the liver and the heart muscle. It is unknown if iron build-up is present many years after completing cancer therapy. It is also not known if extra iron causes harm to internal organs. Researchers at St. Jude Children's Research Hospital (SJCRH) want to understand if iron build-up (called "iron overload") exists in survivors of leukemia. They also want to know if iron overload can cause injury to your organs if it is present. Liver iron accumulation has been documented in childhood cancer survivors, however, it is not known if iron associated organ toxicity is contributing to the long-term morbidity that has been well documented among these survivors. This study will investigate the prevalence of iron overload and the association of tissue iron burden with markers of organ dysfunction in leukemia survivors. This study will determine the prevalence of iron overload among long-term leukemia survivors that underwent blood transfusion. This study will use blood and magnetic resonance imaging (MRI) testing to determine iron overload of specified organs. Understanding the prevalence of iron overload could impact surveillance practices in leukemia survivors. PRIMARY OBJECTIVE: To determine the prevalence of iron overload in the liver [liver iron concentration (LIC) >3mg/g using R2* MRI measurements] and in the heart (T2* <20 ms) among long-term leukemia survivors transfused with ≥50ml/kg of packed red blood cells. SECONDARY OBJECTIVES: To examine the relationship between hepatic, cardiac, and endocrine dysfunction and transfusionally acquired iron overload as defined by R2* and T2* MRI among survivors of pediatric leukemias. To investigate the association between serum ferritin, transferrin saturation, non-transferrin-bound iron, and hepcidin measurements with R2* and T2* MRI-defined iron overload.

Iron demand: The average daily demand to fit the cell biological metabolism is balanced between intake and lost which about 1-2 mg.

Dysmetabolic iron overload syndrome (DIOS), is a frequent hepatic iron overload associated with metabolic syndrome. We hypothesize that this mild iron overload can induce a increased macrophagic polarization towards inflammatory types, thereby contributing to cardiovascular risk. Our main objective is to highlight the influence of iron overload on polarization capacity of monocytes into alternative macrophages (called M2). We therefore compare phenotypic markers of monocytes/macrophages between subjects with DIOS, metabolic syndrome without iron overload and lean subjects.

The investigators aim to give an overview of Iron overload(IOL) of patients with AA and low and int-1 risk MDS and their sequelae under different chelation treatment. And the investigators also aim to evaluate the relationship of LIC and T2*/R2*.

The purpose of the present study is to evaluate in hemodialysis patients, who have elevated serum ferritin ( >2000ng/ml) and transferrin saturation (TSAT) >30%, iron deposition in the heart, pancreas, liver and spleen using the T2* MRI technique. In addition, we will also measure the free iron forms in the plasma and LPI, LCI in red blood cells, platelets and PMN, in addition to serum hepcidin, TSAT, serum ferritin, CRP and oxidative stress parameters (ROS,GSH, and malonyldialdehyde (MDA).