View clinical trials related to Sickle Cell Disease.
Filter by:The study will be conducted at 15-20 US centers in a randomized, placebo-controlled, double-blind fashion. Enrollees will be hospitalized sickle cell disease (SCD) patients at-risk for acute chest syndrome (ACS) based on the presence of vaso-occlusive crisis (VOC), fever (T ≥38.0°C) and serum sPLA2 concentration ≥50 ng/mL.
Hypothesis 1: A novel nonmyeloablative condition regimen will be safe and efficacious in producing stable donor chimerism and cure of severe hemoglobinopathy. Hypothesis 2: Stable donor chimerism will result in amelioration of cerebral vasculopathy, improved cerebral perfusion and neurocognitive function. Specific Aim 1: Study the safety and efficacy of a novel non-toxic conditioning regimen for HSCT for patients with severe hemoglobinopathies and the kinetics of lineage specific chimerism after HSCT We will test our hypothesis that a novel nonmyeloablative condition regimen will be safe and efficacious in producing stable donor chimerism and cure of severe hemoglobinopathy: Specific Aim 2: Optimize the immunosuppressive regimen for HSCT patients through a thorough understanding of the pharmacokinetics of Busulfan (BU) and mycophenolate mofetil (MMF) in the patient population. This will involve: 1. Determine the pharmacokinetics of intravenously and orally administered MMF and intravenous BU in patients receiving HSCT. 2. Determine the relationship of Area under the curve (AUC) of BU and mean trough concentrations of mycophenolic acid (MPA) to engraftment and graft versus host disease (GVHD). 3. Determine the relationship of Area under the curve (AUC) and steady state concentration of BU to engraftment at day 30 and 1 year post HSCT. Specific Aim 3: Study the effect of complete or partial donor chimerism on silent and overt cerebral vasculopathy, and neurocognitive functioning in patients with SCD undergoing HSCT. We will test our hypothesis that stable donor chimerism will result in improvement in cerebral vasculopathy and neurocognitive function. This will include. 1. Determine effect of transplantation silent and overt cerebral vasculopathy by comparison MRA and TCD 1 year after HSCT to pre-HSCT studies. 2. Determine effect on HSCT on neurocognitive function. Specific Aim 4: To determine the rate of T cell immune reconstitution in children with sickle cell disease following myeloablative compared to nonmyeloablative stem cell transplantation, using immunophenotyping assays, CDR3 spectratyping TREC analysis, and measurement of T cell specific donor engraftment.
The primary purpose of this study is to see if giving lower doses of chemotherapy (moderately ablative) will result in successful bone marrow replacement without as severe side-effects but with permanent control of the disease. Patients will receive a chemotherapy regimen with busulfan, fludarabine, and alemtuzumab followed by an infusion of stem cells, either from a family-related or cord-blood matched donor.
This study will examine whether hypnosis can reduce the frequency and intensity of pain in patients with sickle cell disease. Patients 18 years of age and older with sickle cell disease and a history of pain associated with their disease may be eligible for this study. Participants are interviewed to assess their frequency and intensity of pain, sleep quality, coping strategies, mood and anxiety and are then randomly assigned to study Group A or B (see below). All participants are given pain diaries to complete at home and turn in at each clinic visit. They undergo the following procedures: Group A Weeks 1-4: Receive weekly 60-minute hypnosis sessions, in which they are given suggestions for relieving pain, reducing anxiety, improving sleep and enhancing their health and well-being. The sessions are audio- and videotaped. Week 5: Are interviewed to assess pain, sleep, coping strategies, mood and anxiety. Week 6: Receive a DVD player and DVD with instruction on how to perform self-hypnosis. They practice hypnosis at home as often as needed, but at least once a day. They record in a pain diary in the morning and the evening their amount of pain, medication use, school or work attendance, quality and amount of sleep and number of times they use self-hypnosis. Weeks 8, 10 and 12: Turn in their pain diaries and have a pain assessment. Week 12: Are assessed for how they respond to the hypnosis. Group B Weeks 1-4: Receive weekly 60-minute sessions of education about sickle cell disease. Week 5: Are interviewed to assess pain, sleep, coping strategies, mood and anxiety. Week 6: Turn in their daily pain diaries and receive a DVD player and DVD that contains educational materials about sickle cell disease. Weeks 8, 10 and 12: Turn in their pain diaries and have a pain assessment. Weeks 13-24: Follow the procedures described in weeks 1-12 for Group A.
Sickle cell disease (SCD) is a devastating chronic health condition that primarily affects African-Americans. Painful episodes are the most frequent form of morbidity in SCD and the most frequent reason for hospitalization. Cognitive-behavioral interventions for pain management have shown efficacy for improving coping abilities, reducing the amount of medication needed to manage pain, and improving daily functioning during painful episodes. However, difficulties with disseminating and implementing cognitive-behavioral treatments have resulted in almost no use of these techniques in pediatric settings. In South Carolina these difficulties are compounded by social and geographical factors that pose particular challenges. A major issue with implementing quality pain management protocols is the difficulty with providing adequate practice and monitoring of the use of the techniques, particularly given the rural population in South Carolina and transportation difficulties for economically disadvantaged families. Due to a history of under-treating pain in SCD it is also critical that psychological and medical treatments are presented in an integrated manner so that these approaches are viewed as complimentary, not mutually exclusive, approaches to pain management. Finally, we believe the same implementation issues for improving the use of behavioral coping skills are also important for improving adherence to medication protocols for appropriate home-based pain management. The purpose of this proposal is to develop, implement, and evaluate a pain management protocol that uses portable electronic devices and other technologies to increase the practice of psychosocial pain management techniques, improve adherence to the overall biopsychosocial pain management protocol, and improve the clinician's ability to track progress with fewer office visits. In addition to addressing important dissemination issues, by embedding methods to assess for adherence into the technology it will be possible to continuously evaluate and modify protocol efficacy, resulting in a product that is effective, empirically sound, and flexible. Participants will be randomly assigned to the intervention or waitlist control condition. Those on the waitlist condition will receive the same study procedures after a 2 month wait periods. We anticipate that the intervention will result in better pain management and less impairment in the participants.
This study will explore how people with sickle cell disease (SCD) develop a complication called pulmonary hypertension (PHTN), a serious disease in which blood pressure in the lungs is higher than normal. PHTN is also caused by HIV, hepatitis C and schistosomiasis. Patients who have both SCD and one of these other infections may develop more severe PHTN. The number of Nigerians with SCD who also have PHTN is not known, nor is the cause of PHTN in this population. This study will examine genetic material in people with and without SCD to determine whether certain genes will allow doctors to predict which patients with SCD are likely to develop PHTN. Nigerian males and females 10 years of age and older with or without SCD may be eligible for this study. Patients must have SS, SC, or SB thalassemia or other genotype; control subjects must have hemoglobin A or AS genotype. Participants undergo a complete medical history and physical examination, blood tests, electrocardiogram (EKG), ultrasound tests of the heart and abdomen, and a 6-minute walk (distance test) to determine exercise capacity. Blood tests include screening for HIV, hepatitis B and C, schistosomiasis, hookworm and malaria. Patients who test positive for HIV, hepatitis B or C, schistosomiasis, hookworm or malaria are referred for treatment at Ahmadu Bello University Teaching Hospital in Zaria, Nigeria, and those who test negative for hepatitis B are referred for vaccination. Genetic tests focus on genes involved in SCD, PHTN, inflammation, blood vessel function and red blood cell function.
The goal of this study is to test the hypothesis that hydroxyurea is effective for the specific treatment of secondary pulmonary hypertension found on screening in children and young adults with sickle cell disease.
To evaluate PK and PD responses to L-citrulline given orally for four weeks to patients with sickle cell disease who are otherwise healthy.
The primary objectives of this prospective, observational study are (1) to describe the long-term cellular, molecular, and clinical effects of hydroxyurea therapy in sickle cell disease, and (2) to perform hydroxyurea pharmacokinetics studies. This study will follow sickle cell patients being treated with hydroxyurea for a long period of time to evaluate the long-term cellular and molecular effects of the drug on the patients' body. This study will consist of two patient groups. One group will be made up of patients who have received hydroxyurea therapy before entering the study. The second group will be made up of patients who have not received hydroxyurea before study entry.
This trial is a follow-up companion study to Protocol ICA-17043-10, a Phase III, multi-center, efficacy and safety study of ICA-17043. This is an open-label extension study collecting safety data on the use of ICA-17043 in subjects with sickle cell disease (SCD) (e.g., HbSS, HbSC, HbSb0-thalassemia, HbSb+-thalassemia subjects). All subjects who have successfully completed ICA-17043-10 will, if deemed appropriate by their study Investigator and appropriate consent by subject is given, enroll in the ICA-17043-12 study (Study 12). Only patients who participated in ICA-17043-10 are eligible for this open label study