Active clinical trials for "Anemia, Sickle Cell"

Sickle cell disease (SCD), also known as sickle cell anemia, is an inherited blood disease that can cause intense pain episodes. The purpose of this study is to collect, test, and archive blood and DNA samples from children and adults with SCD to study the role that genes play in SCD. Blood and DNA samples will be stored for use in future SCD studies.

Sickle cell anemia (SCA) patients experience organ damage that begins at an early age and results in significant morbidity and early mortality. Although all SCA patients share the same genetic mutation, the clinical complications are highly variable with some patients experiencing frequent and severe complications, while others have few serious complications. If SCA severity could be predicted early in life, those patients at greatest risk for complications could receive treatment prior to the onset of organ damage. No general SCA severity predictor or one that can be informative early in life exists. The investigators preliminary research has identified the absolute reticulocyte count (ARC) as a potential early predictive risk marker for SCA complications in pediatric patients. A higher ARC between ages 2 and 6 months of age is associated with an increased risk of hospitalization in the first 3 years of life; the mean ARC for the 36 patients who were hospitalized for SCA complications was significantly higher than that of the remaining 23 in those who were not hospitalized. Moreover, total hospitalizations were nearly three times higher by age 2 years in those infants who had an ARC of > 200 than for those infants whose ARC was <200. The proposed study will determine if ARC can be used as a risk-stratifier in asymptomatic infants with SCA and ascertain its value in targeting hydroxyurea therapy to those infants at highest risk of SCA sequelae.

Quantitative and prognostic evaluation of dense red blood cells in sickle cell children: preliminary single center study from the Creteil pediatric cohort.

Sickle cell disease (SCD), also known as sickle cell anemia, is an inherited blood disease that can cause intense pain episodes. The purpose of this study is to gather medical information from children and adults with SCD and establish a database so that researchers can contact people to participate in future SCD research studies.

Patients with sickle cell anemia (SCA) are at an increased risk for damage to brain tissue due to their disease. The investigators are interested in how blood flow and cerebral inflammation are different in SCA patients and how that affects brain tissue- the investigators will use a relatively new set of dynamic MRI techniques to evaluate these parameters. The investigators will image participants with both SCA and matched controls with non-invasive MRI.

The purpose of this research is to better characterize the components and mechanisms of the immune systems of persons with sickle cell disease who have had a kidney transplant and are immunosuppressed. If we can improve our scientific understanding of the fundamental mechanisms involved in patient outcomes, we can potentially maximize the benefits that we seek from transplantation in sickle cell patients with end stage renal disease.

To study the efficacy of Gum Arabic as an anti-oxidant, anti-inflammatory and Fetal Hemoglobin-inducing agent among Sickle Cell Disease children. Half of participants will receive Gum Arabic and the other half will receive placebo

Sickle cell disease (SCD) is characterized by recurrent vaso-occlusive pain crisis (VOC), which may evolve to acute chest syndrome (ACS), the most common cause of death among adult patients with SCD. Currently, there is no safe and effective treatment to abort VOC or prevent secondary ACS. Management of VOC mostly involve a symptomatic approach including hydration, analgesics, transfusion, and incentive spirometry, which was investigated in a very limited number of patients (<30). The polymerisation of HbS is one major feature in the pathogenesis of vaso-occlusion. Among factors determining the rate and extent of HbS polymer formation, the hypoxic stimulus is one of the most potent and readily alterable. Current guidelines recommend oxygen therapy in patients with VOC in order to maintain a target oxygen saturation of 95%. Low-flow nasal oxygen (LFNO) is routinely used to achieve this normoxia approach, particularly in patients at risk of secondary ACS because they may experience acute desaturation. In contrast, various case series suggest a potential beneficial role of intensified oxygen therapy targeting hyperoxia for the management of VOC, particularly with the use of hyperbaric oxygen, but the latter is difficult to implement in routine clinical practice. A recent high-flow nasal oxygen (HFNO) technology allows the delivery of humidified gas at high fraction of inspired oxygen (FiO2) through nasal cannula. The FiO2 can be adjusted up to 100% (allowing hyperoxia that may reverse sickling) and the flow can be increased up to 60 L/min (which generates positive airway pressure and dead space flushing, that may prevent evolution of VOC towards ACS by alleviating atelectasis and opioid-induced hypercapnia). In patients with acute respiratory failure, HFNO has been shown to improve patient's comfort, oxygenation, and survival as compared to standard oxygen or non-invasive ventilation. The aim of the present study is to test the efficacy and safety of HFNO for the management of VOC and prevention of secondary ACS. The investigators will use a multi-arm multi-stage (MAMS) design to achieve these goals. HFNO will be delivered through AIRVO 2 (Fisher and Paykel Healthcare, New Zealand), a device that incorporates a turbine allowing its use in hospital wards.

The hypothesis is that in sickle cell anaemia, nocturnal oxyhaemoglobin desaturation, is associated with low processing speed index, and this morbidity can be reduced with overnight auto Continuous Positive Airways Pressure and/or oxygen supplementation.

The main objective of this study is to prove the superiority of a procedure which calculates the volume of RBCs to transfuse and the time between apheresis based on this algorithm, compared to the current procedure. The primary endpoint would be the number of patients with individually achieved objectives in terms of % HbS before each apheresis (which reflects the effectiveness of the previous apheresis) over a period of 12 months. The secondary objectives would be to compare the volume differences of transfused RBCs in both groups over a period of 12 months, the occurrence of clinical events and the satisfaction of patients and physicians. The investigators hope that this study would improve the efficiency and the performance of apheresis in sickle cell patients. The investigators also hope to facilitate the organization of procedures with the flexibility that would allow the use of this algorithm.