Active clinical trials for "Anemia, Sickle Cell"

Background: Sickle cell disease (SCD) is a common inherited blood disorder. Many people with SCD are at risk to get pulmonary hypertension (PH). PH means that the blood pressure in the blood vessels to the lungs is high, and is a serious disease and. Very few studies have looked at the success of treatments for PH in people with SCD. Researchers want to learn more about treating PH with a type of drug called phosphodiesterase type 5 inhibitors (PDE5-I). They will look at the records of people who have already joined other studies. Objective: To identify people who already joined NIH SCD protocols whose medical records should be reviewed. The review will look at the description of SCD patients with PH who have already taken PDE5-I and the outcomes for these people. Eligibility: Adults ages 18 and older with SCD and PH. They must have joined certain NIH studies and taken PDE5-I therapy for at least 16 weeks. Design: This study is a review of medical records. Researchers will collect data from databases of existing studies. They will identify people in those studies who have SCD and PH and took the study drug for at least 16 weeks. Researchers will review the full medical records of those people. From that review, researchers will find participants who meet the inclusion criteria. They will extract data from those records. Researchers will analyze the data. This includes results from heart and lung tests, imaging, and walking tests. It will also include results of a procedure called right heart catheterization. Demographic data and lab data will also be collected. Researchers will remove identifying information from the data, then share it in a database.

There are approximately 90,000 individuals in the United States with sickle cell disease (SCD). Studies have shown that up to 98 percent of patients with Sickle Cell Disease have a vitamin D deficiency, defined as a 25-hydroxyvitamin D level (25(OH)D) less than or equal to 20 ng/mL. As a result, of low bone density, patients may develop osteonecrosis, chronic inflammation and related pain. This study will be coordinated with patients' regularly scheduled visits for medical care and will require patients to submit blood sample at the start of the study and at 3, 6, 9, AND 12 month visits. Patients will also be scheduled for a bone density measurement (DXA scan) at the start of the study and after 12 months of supplementation to assess for any bone re-mineralization. Thus, the main purpose of this study is to find the amount of nutritional vitamin D that needs to be taken by patients with sickle cell disease in order to correct vitamin D deficiency. The study will also test whether vitamin D supplements improve bone health and reduce inflammation.

Secretory phosholipases A2 (sPLA2) are significantly elevated in the plasma of sickle cell disease patients with acute chest syndrome (ACS), and similar enzymes have been measured in exhaled breath condensate (EBC), which is collected easily and non-invasively. The investigators hypothesize that sPLA2 will be measurable in EBC samples from sickle cell patients with acute chest syndrome.

Sickle cell disease is one of the most common genetic diseases in the world. (1) It is characterized by the production of abnormal hemoglobin mainly responsible for vaso-occlusive clinical manifestations and chronic hemolysis with anemia. (2) It is therefore a chronic disease with major acute complications, such as acute chest syndrome. The treatment for this syndrome will be based on oxygenation, hydration and analgesia. At the physiotherapy level, we will have an action on the prevention and treatment of the syndrome by incentive spirometry. (3,4) In fact, it is currently the only physiotherapy treatment that has proven its effectiveness and is recommended for sickle cell patients. (3) As part of prevention, it is recommended to prescribe incentive spirometry during vaso-occlusive crisis. It has been shown to reduce the risk of atelectasis and significantly limit the risk of developing ACS. (5) In treatment, it makes it possible to regain normal chest amplification and therefore to allow ventilation of unventilated areas. (3.4) However, in order to increase therapeutic efficacy, patient compliance is essential. Adherence to treatment is a major problem in chronic diseases. Currently, it is estimated that 80% of patients with chronic conditions do not sufficiently follow their therapy, which limits the optimization of benefits. (6) This is the case in sickle cell patients, especially with hydroxyurea which is their disease-modifying treatment. Lack of adherence is the most common cause of primary failure of this treatment. During various treatments, we noticed the patients' lack of compliance with spirometry. Indeed, we explained to the patient how to do the incentive spirometry, so that he could practice it several times a day as recommended. When we returned the next day, or after a weekend, most of the time the patients had little or no observance. So I wanted to know if this concerns a majority of patients with sickle cell disease. Indeed, it appears important to assess compliance in these patients in order to improve the effectiveness of treatment and reduce the risk of ACS.

Sickle cell disease is associated with significant morbi-mortality hence the interest in an early and targeted care. At present, there is no plasmatic marker able to identify infants at higher risk of developping severe complications later in life. However, recent studies have demonstrated a correlation between certain complications of the disease and biomarkers of the endothelial dysfunction characterizing it. Investigators prospectively followed a cohort of children diagnosed with SCD through the universal neonatal screening using inflammatory and haemostatic plasmatic markers to study their annual evolution. Investigators then will evaluate potential associations between these biological markers and the occurrence of SCD related complications. A secondary objective of this study is to evaluate the repercussions of therapeutic intervention on these markers. .

Sickle cell disease (SCD) children and adults with asthma have an increased rate of vaso-occlusive crisis, acute chest syndrome episodes, and premature mortality when compared to those without asthma. We hypothesised that either asthma diagnosis and/or bronchodilator treatment may aggravate SCD via their modulating effect on autonomic nervous system.

The aim of this study is to collect and analyze retrospective data on Oxbryta in a real-world setting. This is a multicenter, retrospective data collection and analysis study to characterize health outcomes in approximately 300 patients with SCD who have been treated with Oxbryta as part of their usual care. Any patient with SCD who received Oxbryta treatment for at least 2 weeks as part of their usual care according to the Oxbryta US Prescribing Information (USPI) is eligible to participate. Study data from 1 year before and up to 1 year after the first dose of Oxbryta will be entered in case report forms (CRFs) via an electronic data capture (EDC) system by the study staff.

Pain is the most common component of the morbidity seen in sickle cell disease (SCD), and may be acute or chronic. It is most commonly acute and a result of the hallmark vaso-occlusive episodes of the disease. Many patients however suffer from chronic pain - defined as pain lasting over three months- with neuropathic pain being a component of chronic pain. Neuropathic pain significantly contributes to the chronicity and morbidity of pain in SCD patients, and is an inadequately managed complication. There is a paucity of literature covering this area, and it has never been examined in the Jamaican population. The main objective of this study is to determine the epidemiology of pain among Jamaicans with SCD, and determine the prevalence of chronic and neuropathic pain among these patients. A second objective is to validate, using gold-standard measures, screening tools to determine neuropathic pain among the study population. This cross-sectional study will investigate the prevalence of neuropathic pain and complications in a sample of persons with SCD in Jamaica aged 14 years and older, with a validation sub-study to be conducted on a random 20 percent of the sample. With improved diagnosis of neuropathic pain, clinicians may potentially improve the management of pain in SCD, as clinicians should be able to direct our treatment toward medications and non-pharmacological methods of pain relief that are more specific for neuropathic pain. All data will be de-identified and maintained in a secure database, with access limited to key personnel. There is very minimal risk to participants.

The Sickle Cell Anemia (SCA) is a recessive genetic condition, monogenic, resulting in defects in the red cell structure. In the investigators' country, this disease affects about 3,000 children each year and is considered one of the most prevalent disorders among the group of existing hereditary diseases. The lungs are frequently affected in this disease by Acute Chest Syndrome (STA). Besides being the leading cause of death and the second leading cause of hospitalization in SCA, the STA is correlated with cognitive impairment frame these patients, resulting secondary Stroke vaso-occlusion of capillaries that supply the brain tissue. Traditional tests of pulmonary function allow assess whether the person has any commitment in the respiratory system, whether obstructive, restrictive or mixed. To run these tests it is necessary that the patient understands and performs a forced expiratory maneuver to obtain reliable results. In the particular case of SCA, performing these tests it is very difficult due to the presence of cognitive impairment of varying degrees. This results in underdiagnosis of early changes in the lung parenchyma during the therapeutic window, committing the proper monitoring and treatment offered to these patients.

The study will seek to enroll 100 sickle cell or thalassemia patients who are age 12 or older who have access to a smartphone or tablet with Internet access daily. The study will evaluate patient-reported comfort level with using a mobile device to record their pain levels, as well as adherence to recording these levels daily. The study will track patients' assessment of their pain, actions taken, and outcomes related to pain management and provider involvement. This study will attempt to collect information about differences in the use of two traditional pain assessment modes (verbal scale and paper) versus the use of a pain assessment tool on a mobile device in the form of a smartphone, tablet, or iPad with an Android or iOS operating system.