Sickle Cell Disease

160

Review clinical trials related to Sickle Cell Disease. Use filters to narrow results by trial status, phase, treatment, biological sex and sponsor.

Condition / disease
Location
Status: Recruiting

ATHN Transcends: A Natural History Study of Non-Neoplastic Hematologic Disorders

In parallel with the growth of ATHN's clinical studies, the number of new therapies for all blood disorders is increasing significantly. Some of the recently FDA-approved therapies for congenital and acquired hematologic conditions have not yet demonstrated long-term safety and effectiveness beyond the pivotal trials that led to their approval. In addition, results from well controlled, pivotal studies often cannot be replicated once a therapy has been approved for general use.2,3,4,5 In 2019 alone, the FDA has issued approvals for 24 new therapies for congenital and acquired hematologic conditions.6 In addition, almost 10,000 new studies for hematologic diseases are currently registered on www.clinicaltrials.gov.7 With this increase in potential new therapies possible, it is imperative that clinicians and clinical researchers in the field of non-neoplastic hematology have a uniform, secure, unbiased, and enduring method to collect long-term safety and efficacy data. As emphasized in a recently published review, accurate, uniform and quality national data collection is critical in clinical research, particularly for longitudinal cohort studies covering a lifetime of biologic risk.8

Participants needed: 3,000
Trial details
Biological sex: AllType: ObservationalSponsor: American Thrombosis and Hemostasis NetworkUpdated: Jul 13, 2026Locations: 71
Eligibility criteria

Any age [+138]

Status: Recruiting

Partial Stem Cell Transplant for Sickle Cell Disease From Matched Donors

This is a non-ablative (partial) stem cell transplant for patients with severe sickle cell disease or beta-thalassemia requiring red cell transfusions. The intensity of the transplant is slightly increased from our previous transplant regimens. The goal is to aim for higher percentage of donor cells to stably remain in the recipients long term.

Participants needed: 90
Trial details
Phase: Phase 1, Phase 2Age: 4-65Biological sex: AllType: InterventionalSponsor: National Heart, Lung, and Blood Institute (NHLBI)Updated: Jul 13, 2026Locations: 1
Eligibility criteria

Portal fibrosis by liver biopsy [+12]

Karnofsky or Lanksy performance status of <40 [+9]

Status: Recruiting

Partial Stem Cell Transplant for Sickle Cell Disease From Matched Donors

This is a non-ablative (partial) stem cell transplant for patients with severe sickle cell disease or beta-thalassemia requiring red cell transfusions. The intensity of the transplant is slightly increased from our previous transplant regimens. The goal is to aim for higher percentage of donor cells to stably remain in the recipients long term.

Participants needed: 90
Trial details
Phase: Phase 1, Phase 2Age: 4-65Biological sex: AllType: InterventionalSponsor: National Heart, Lung, and Blood Institute (NHLBI)Updated: Jul 2, 2026Locations: 1
Eligibility criteria

Portal fibrosis by liver biopsy [+12]

Karnofsky or Lanksy performance status of <40 [+9]

Status: Recruiting

Gene Correction in Autologous CD34+ Hematopoietic Stem Cells (HbS to HbA) to Treat Severe Sickle Cell Disease

This study is a first-in-human, single-arm, open-label Phase I/II study of nula-cel in approximately 15 participants, diagnosed with severe Sickle Cell Disease. The primary objective is to evaluate safety of the treatment in this patient population, as well as preliminary efficacy and pharmacodynamic data.

Participants needed: 15
Trial details
Phase: Phase 1, Phase 2Age: 12-50Biological sex: AllType: InterventionalSponsor: Kamau TherapeuticsUpdated: Jul 2, 2026Locations: 6
Eligibility criteria

≥12 to ≤ 40 years [+3]

Available 10/10 HLA-matched sibling donor [+5]

Status: Not yet recruiting

Assessing Molecular Mechanisms and Effects of Music Therapy in Youth With Sickle Cell Disease Using Single-cell RNA-sequencing

The goal of this clinical trial is to evaluate whether a 4-week music therapy (MT) intervention can reduce chronic pain and improve psychosocial outcomes in youth with sickle cell disease (SCD). The main questions it aims to answer are: * Does MT reduce pain intensity, frequency of pain episodes, and improve health-related quality of life (HRQoL)? * Does MT alter immune cell composition and gene expression in inflammatory pathways, as measured by single-cell RNA sequencing (scRNA-seq)? Researchers will compare participants randomized to music therapy versus a control condition to see if MT produces superior improvements in pain and psychosocial outcomes, and distinct molecular changes.

Participants needed: 25
Trial details
Age: 8-18Biological sex: AllType: InterventionalSponsor: Emory UniversityUpdated: Jul 1, 2026Locations: 1
Eligibility criteria

Diagnosed with SCD [+4]

Major hearing deficiency or medical condition in which listening to music may be...

Status: Recruiting

A Phase I/II Study of ITU512 in Healthy Participants and Patients With Sickle Cell Disease

The purpose of this study is to evaluate the safety, tolerability, pharmacokinetics (PK), and preliminary food effect of ITU512 as well as the fetal hemoglobin (HbF)-inducing capacity of ITU512. This will be the first evaluation of the potential therapeutic effect of ITU512 in healthy participants and patients with sickle cell disease (SCD).

Participants needed: 161
Trial details
Phase: Phase 1, Phase 2Age: 12-55Biological sex: AllType: InterventionalSponsor: Novartis PharmaceuticalsUpdated: Jun 30, 2026Locations: 6
Eligibility criteria

Healthy male participants and female participants of non-childbearing potential... [+2]

QTcF ≥ 450 msec (as a mean value of triplicates) [+6]

Status: Recruiting

Peripheral Arterial Tonometry and Neurocognition in Sickle Cell Disease

This study will examine sleep disordered breathing and sleep quality in participants (ages 12-25) diagnosed with sickle cell disease of any genotype. We will utilize remote peripheral arterial tonometry (PAT) and questionnaires to evaluate difficulties with sleep. PAT assessments will occur remotely in the homes of participants. Neurocognitive, behavioral, and neuroimaging evaluations will occur on the same day as a routine clinic visit. Primary Objective: Evaluate the relationship between nocturnal oxyhemoglobin saturation (SpO2) and neurocognitive functioning (working memory and verbal comprehension) in individuals (ages 12-25) diagnosed with sickle cell disease controlling for age, genotype, and social vulnerability. Secondary Objective: Assess differences in white matter integrity, silent cerebral infarcts, neuroinflammation, and functional connectivity among individuals (ages 12-25) diagnosed with sickle cell disease with and without sleep disordered breathing after controlling for age. Assess differences in self- and caregiver-reported mood and pain severity among individuals (ages 12-25) diagnosed with sickle cell disease with and without sleep disordered breathing after controlling for age. Exploratory Objectives: Explore the relationship between nocturnal oxyhemoglobin saturation (SpO2) and neurocognitive functioning (attention, processing speed, verbal memory, visual memory, motor dexterity) in individuals (ages 12-25) diagnosed with sickle cell disease controlling for age, genotype, and social vulnerability. Assess the feasibility of an optical imaging tool (Speckle Contrast Optical Spectroscopy - Open-Motion 3.0) to measure cerebral blood flow and blood volume in patients diagnosed with sickle cell disease (ages 12-25). Assess the concordance between measurement of cerebral blood flow and volume using speckle contrast optical spectroscopy and arterial spin labeling brain MRI.

Participants needed: 65
Trial details
Age: 12-25Biological sex: AllType: ObservationalSponsor: St. Jude Children's Research HospitalUpdated: Jun 29, 2026Locations: 1
Eligibility criteria

Diagnosed with sickle cell disease of any genotype [+4]

History of an intellectual disability [+5]

Status: Not yet recruiting

Virtual Reality for SCD VOC

This pilot study will evaluate the feasibility, tolerability, and preliminary analgesic effect of headset-based virtual reality interventions for adults with sickle cell disease experiencing vaso-occlusive crisis treated in an infusion center. Participants will be enrolled during routine outpatient sickle cell clinic visits and may receive study interventions during future qualifying infusion center visits for vaso-occlusive pain. Using a randomized, two-period crossover design, each participant will be assigned to receive two of three headset-based conditions across separate visits: sham 2D headset control, passive immersive 3D virtual reality, or active immersive interactive 3D virtual reality. The primary outcome is pain burden during the first 60 minutes after intervention start, measured as area under the curve of 0-10 numeric rating scale pain scores. Secondary outcomes include feasibility of intervention delivery, headset tolerability, pain at 120 minutes, opioid use, and participant-reported immersion and acceptability.

Participants needed: 25
Trial details
Age: 18-89Biological sex: AllType: InterventionalSponsor: University of Maryland, BaltimoreUpdated: Jun 29, 2026Locations: 1
Eligibility criteria

Adult (age ≥ 18 years) patients [+3]

Prior enrollment in this study [+8]

Status: Recruiting

The Efficacy and Safety of Rilzabrutinib in Participants Aged 10 to 65 Years With Sickle-cell Disease

This is a multicenter, randomized, double-blind, placebo-controlled, parallel-group, flexible-adaptive, group-sequential study (Part A), followed by an open-label LTE period (Part B) to investigate the efficacy, and safety of rilzabrutinib in participants with sickle-cell disease (SCD). Study details include: * Study duration: a 52-week double-blind period (Part A), followed by an open-label LTE period (Part B). Double-blind period has two parts, 50% (adult only) until the interim analysis (a proof-concept part analogous to a phase 2b study), and 50% (adult and children) after the interim analysis. Only the participants who complete double-blind treatment period (Part A) are eligible to continue to the LTE period. The duration of the LTE period (Part B) will be from the first-participant-in (FPI)-LTE (Part B) until the last participant who enters the LTE has completed 52 weeks. * Treatment duration: 52-week double-blind period (Part A); LTE period (Part B) from the (FPI until the last participant who enters the LTE has completed 52 weeks. * Visit frequency: Week visits based on the Schedule of Assessments.

Participants needed: 192
Trial details
Phase: Phase 3Age: 10-65Biological sex: AllType: InterventionalSponsor: SanofiUpdated: Jun 23, 2026Locations: 53
Eligibility criteria

Participants who have been diagnosed with SCD. [+5]

Participants are excluded from the study if any of the following criteria apply:... [+7]

Status: Recruiting

Efficacy and Safety of Tocilizumab for Acute Chest Syndrome Treatment in Patients With Sickle Cell Disease

The purpose of this study is to determine whether a single infusion of tocilizumab is effective in reducing the time to successful weaning from both supplemental oxygen and any respiratory support, in pediatric and adult patients with sickle cell disease (SCD) during acute chest syndrome (ACS).

Participants needed: 130
Trial details
Phase: Phase 3Age: 2+Biological sex: AllType: InterventionalSponsor: Assistance Publique - Hôpitaux de ParisUpdated: Jun 24, 2026Locations: 1
Eligibility criteria

SCD patient of all genotypes (SS, SC, S/β0 and S/β+ or other major SCD syndrome) [+7]

Impossibility to perform tocilizumab/placebo injection within the first 48 hours... [+13]

Status: Not yet recruiting

A Study to Investigate the Effect of Mitapivat on Transfusion Burden in Subjects With Sickle Cell Disease (SCD)

The primary objective of this study is to determine the effect of mitapivat versus placebo on the need for transfusions in subjects with SCD.

Participants needed: 159
Trial details
Phase: Phase 3Age: 12+Biological sex: AllType: InterventionalSponsor: Agios Pharmaceuticals, Inc.Updated: Jun 23, 2026
Eligibility criteria

Age ≥12 years. [+12]

Pregnant, breastfeeding, or parturient. [+32]

Status: Recruiting

A Study to Investigate the Efficacy and Safety of Crizanlizumab (5 mg/kg) Compared With Placebo in Adolescent and Adult Sickle Cell Disease Patients Who Experience Frequent Vaso-Occlusive Crises (SPARKLE)

A phase III, multi-center, randomized, placebo-controlled, double-blind study to assess efficacy and safety of crizanlizumab (5 mg/kg) versus placebo, with or without hydroxyurea/hydroxycarbamide therapy, in adolescent and adult Sickle Cell Disease patients with frequent vaso-occlusive crises.

Participants needed: 315
Trial details
Phase: Phase 3Age: 12-100Biological sex: AllType: InterventionalSponsor: Novartis PharmaceuticalsUpdated: Jun 22, 2026Locations: 32
Eligibility criteria

Participants must be aged 12 years and older on the day of signing informed cons... [+3]

Fewer than 4 or more than 12 VOCs that are HCP-managed (including VOCs leading t... [+5]

Status: Recruiting

Collection of Human Biospecimens for Basic and Clinical Research Into Globin Variants

Background: Blood disorders like sickle cell disease and malaria affect many people around the world. Researchers want to learn more about blood disorders. To do this, they need to collect biological samples from people with blood disorders. They also need to collect samples from healthy people. Objective: To collect samples to use for research on blood disorders. Eligibility: People ages 18-70 who have blood disorders. Healthy volunteers without blood disorders are also needed. Design: Participants will be screened with a medical history, physical exam, and blood and urine tests. Participants will give one or more samples. They will give them over 5 years. They can choose not to give any of the samples: Saliva: Participants will spit into a tube. They may also have the inside of their mouth swabbed. Urine: Participants will urinate into a cup. Blood and blood waste products: Blood will be taken through a needle in the participant s arm. Fat samples: An area on the participant s belly or buttock will be numbed. A small cut will be made into the skin and a small piece of fat removed. Mucus and cells from the lungs: The participant will be sedated. A flexible tube will be inserted through the nose or mouth into the lung airways. These participants will also have a physical exam, chest x-ray, and heart tests after the procedure. ...

Participants needed: 300
Trial details
Age: 18-70Biological sex: AllType: ObservationalSponsor: National Institute of Allergy and Infectious Diseases (NIAID)Updated: Jun 18, 2026Locations: 1
Eligibility criteria

PARTICIPANT [+5]

Exclusion Criteria for All Participants [+25]

Status: Recruiting

A Study to Evaluate How Well Etavopivat Works in People With Sickle Cell Disease

This study is conducted to confirm whether etavopivat works well at reducing the number of Vaso-occlusive crisis VOCs (sickle cell pain crises) caused by obstructions in blood vessels in adults and adolescents living with sickle cell disease. The study will also evaluate how well etavopivat can reduce the damage to different organs, improve your exercise tolerance and reduce fatigue in people with sickle cell disease.The participants will either get etavopivat or placebo. Which treatment the participants will get is decided by chance. Etavopivat is a new medicine and is currently being tested in other studies in addition to this one. The study will last for about 2 years.

Participants needed: 408
Trial details
Phase: Phase 3Age: 12+Biological sex: AllType: InterventionalSponsor: Novo Nordisk A/SUpdated: Jun 17, 2026Locations: 174
Eligibility criteria

Male or female. [+4]

More than 15 VOCs within the past 12 months prior to screening documented in the... [+12]

Status: Recruiting

Hydroxyurea Exposure Limiting Pregnancy and Follow-Up Lactation

The purpose of this research study is to document and understand the effects of hydroxyurea exposure for women with SCD and their babies, during both gestation and lactation.

Participants needed: 200
Trial details
Biological sex: AllType: ObservationalSponsor: Children's Hospital Medical Center, CincinnatiUpdated: Jun 18, 2026Locations: 1
Eligibility criteria

Medical records or data available from previous clinical care prior to June 20,... [+1]

Unavailable medical records or lack of information about hydroxyurea exposure.

Status: Not yet recruiting

Transcranial Photobiomodulation Treatment in Patients With Sickle Cell Disease

Participants are being asked to take part in this clinical trial, a type of research study, because investigators want to learn more about oxygen usage in the brain. Patients diagnosed with sickle cell disease are at risk for difficulties with thinking and academic skills. The brain requires a consistent supply of oxygen for normal function, but this supply is reduced among patients with sickle cell disease. The development of new treatments to improve cerebrovascular functioning is needed to limit these difficulties. Transcranial photobiomodulation (i.e., light stimulation to the brain) has the potential to improve cerebrovascular and neurocognitive functioning among patients with sickle cell disease.Participants will be selected randomly (like the flip of a coin) to receive either active light therapy or placebo (no active light treatment). Primary Objectives * Measure the participation rate in a study of transcranial photobiomodulation to improve cognitive functioning in a sample of children with sickle cell disease (ages 8- 17 years). * Assess self- and caregiver-reported ratings of feasibility and acceptability. * Evaluate the frequency and nature of side effects associated with transcranial photobiomodulation. Secondary Objectives * To assess the change in cognitive performance associated with transcranial photobiomodulation compared to a sham control condition. * To measure changes in cerebrovascular oxygenation (oxygenated and deoxygenated hemoglobin) following transcranial photobiomodulation compared to a sham control condition.

Participants needed: 60
Trial details
Age: 8-17Biological sex: AllType: InterventionalSponsor: St. Jude Children's Research HospitalUpdated: Jun 17, 2026
Eligibility criteria

Patient diagnosed with sickle cell disease of any genotype [+4]

History of an abnormal transcranial doppler screening [+3]

Status: Recruiting

Uganda Sickle Surveillance Study (US-3)

It is estimated that over 250,000 babies are born with sickle cell disease (SCD) annually in sub-Saharan Africa, and only 10% - 50% of them survive beyond five years of age. Data describing the magnitude of the sickle cell problem are lacking in most African countries. The available data on prevalence were mainly from older studies and small numbers of hospitalized patients. In Uganda, approximately 25,000 children are born with SCD but 70-80% die before their 5th birthday. Lehmann and Raper found 'sicklaemia' prevalence of 0.8% and 45% in the Sebei and Bambaa ethnic groups, respectively. A recent study found a SCT and SCD prevalence of 3% - 19% and 0% - 3%, respectively but this study addressed only 5 of Uganda's 111 districts and used a small convenience sample of children aged 6 - 60 months. The objective of this study is to determine the prevalence and map out the burden of SCT and SCD in Uganda.

Participants needed: 1,000,000
Trial details
Age: Up to 12Biological sex: AllType: ObservationalSponsor: Children's Hospital Medical Center, CincinnatiUpdated: Jun 16, 2026Locations: 4Duration: 6 Years
Eligibility criteria

Up to 1,000,000 samples may be collected during 2015 - 2030 following primary an...

Repeat samples on the same individuals during the study period will be excluded.

Status: Recruiting

Empowering Adolescents and Young Adults With Sickle Cell Disease as Partners in Treatment Decision Making (EMPOWER-AYA)

This study will evaluate the acceptability, feasibility, and preliminary efficacy of a shared decision making intervention for adolescents and young adults (AYAs) with sickle cell disease (SCD). 60 AYAs with SCD ages 15-25 and their caregivers and 8 SCD providers will participate in the pilot pragmatic trial. AYAs, caregivers, and providers will be recruited from Nemours Children's Hospital, Delaware (NCH-DE), Nemours Children's Hospital in Orlando, FL (NCH-ORL), and Nemours Children's Health at Wolfson Children's Hospital in Jacksonville, FL (NCH-JAX). NCH-DE participants (n=30) will receive the SDM intervention including a virtual reality patient health education component, whereas NCH-ORL and NCH-JAX participants (n=30) will receive the SDM intervention with standard patient education materials (print, video). SCD providers will be trained to use the toolkit components and will introduce decision aids during an outpatient clinic visit for AYAs who are candidates for one or more disease-modifying therapies.

Participants needed: 68
Trial details
Age: 15+Biological sex: AllType: InterventionalSponsor: Nemours Children's ClinicUpdated: Jun 16, 2026Locations: 1
Eligibility criteria

Patients diagnosed with SCD ages 15-25 years receiving treatment at Nemours and... [+2]

Patients/ caregivers who previously participated in usability testing of the int... [+2]

Status: Not yet recruiting

Feasibilty and Acceptability of Amani

Adults with sickle cell disease (SCD) experience severe pain, emotional distress, and social isolation that diminish their quality of life. This project will test Amani, a novel virtual reality supportive care intervention designed to improve coping skills and strengthen peer support. If feasible and acceptable, Amani offers an accessible digital supportive care intervention to improve psychological well-being and quality of life among individuals living with SCD and potentially other chronic illnesses.

Participants needed: 40
Trial details
Phase: Early Phase 1Age: 18+Biological sex: AllType: InterventionalSponsor: Massachusetts General HospitalUpdated: Jun 15, 2026Locations: 1
Eligibility criteria

Adults (≥ 18 years) who are diagnosed with sickle cell disease [+2]

Have severe psychiatric (psychotic disorder, bipoloar disorder) or cognitive imp...

Status: Recruiting

A Research Study Looking at Long-term Treatment With Etavopivat in People With Sickle Cell Disease or Thalassaemia

Etavopivat is a new medicine under development for treating blood disorders like sickle cell disease and thalassaemia. Sickle cell disease and thalassaemia are inherited blood disorders that affect haemoglobin. Haemoglobin is the protein that carries oxygen through the body. This study is looking into how safe treatment with etavopivat is and how well it works over a long period of time. The study will last for up to 264 weeks, but it will end earlier if etavopivat is approved in the participant's country.

Participants needed: 480
Trial details
Phase: Phase 3Age: 2+Biological sex: AllType: InterventionalSponsor: Novo Nordisk A/SUpdated: Jun 10, 2026Locations: 105
Eligibility criteria

Participant must have ongoing participation in an etavopivat parent study for tr... [+3]

Any disorder, except for conditions associated with SCD or thalassaemia, which i... [+7]

Status: Recruiting

Investigation of the Genetics of Hematologic Diseases

The purpose of this study is to collect and store samples and health information for current and future research to learn more about the causes and treatment of blood diseases. This is not a therapeutic or diagnostic protocol for clinical purposes. Blood, bone marrow, hair follicles, nail clippings, urine, saliva and buccal swabs, left over tissue, as well as health information will be used to study and learn about blood diseases by using genetic and/or genomic research. In general, genetic research studies specific genes of an individual; genomic research studies the complete genetic makeup of an individual. It is not known why many people have blood diseases, because not all genes causing these diseases have been found. It is also not known why some people with the same disease are sicker than others, but this may be related to their genes. By studying the genomes in individuals with blood diseases and their family members, the investigators hope to learn more about how diseases develop and respond to treatment which may provide new and better ways to diagnose and treat blood diseases. Primary Objective: * Establish a repository of DNA and cryopreserved blood cells with linked clinical information from individuals with non-malignant blood diseases and biologically-related family members, in conjunction with the existing St. Jude biorepository, to conduct genomic and functional studies to facilitate secondary objectives. Secondary Objectives: * Utilize next generation genomic sequencing technologies to Identify novel genetic alternations that associate with disease status in individuals with unexplained non-malignant blood diseases. * Use genomic approaches to identify modifier genes in individuals with defined monogenic non-malignant blood diseases. * Use genomic approaches to identify genetic variants associated with treatment outcomes and toxicities for individuals with non-malignant blood disease. * Use single cell genomics, transcriptomics, proteomics and metabolomics to investigate biomarkers for disease progression, sickle cell disease (SCD) pain events and the long-term cellular and molecular effects of hydroxyurea therapy. * Using longitudinal assessment of clinical and genetic, study the long-term outcomes and evolving genetic changes in non-malignant blood diseases. Exploratory Objectives * Determine whether analysis of select patient-derived bone marrow hematopoietic progenitor/stem (HSPC) cells or induced pluripotent stem (iPS) cells can recapitulate genotype-phenotype relationships and provide insight into disease mechanisms. * Determine whether analysis of circulating mature blood cells and their progenitors from selected patients with suspected or proven genetic hematological disorders can recapitulate genotype-phenotype relationships and provide insight into disease mechanisms.

Participants needed: 1,716
Trial details
Biological sex: AllType: ObservationalSponsor: St. Jude Children's Research HospitalUpdated: Jun 9, 2026Locations: 1Duration: 10 Years
Eligibility criteria

An individual (proband) receiving therapy or expert consultation regarding a non... [+1]

None

Status: Recruiting

Blood Sampling for Research Related to Sickle Cell Disease

This study will collect representative blood samples from healthy children and adults and from children and adults who have unique red blood cell features that are related to sickle cell disease. Sickle cell disease is a blood disease that limits the ability of red blood cells to carry oxygen throughout the body. The purpose of the study is to collect a variety of blood samples that may then be used to investigate advances and potential new drug treatments for sickle cell disease. Volunteers must be at least 18 years of old. Samples will be taken both from healthy volunteers and from volunteers who have unique red blood cell features that are related to sickle cell disease. Candidates will be screened with a medical history. During the study, participants will undergo a one- to two-hour outpatient procedure at the National Institutes of Health Clinical Center. Once researchers have explained the study and obtained the participant s consent, participants will donate 8 cc (approximately 2 teaspoons) of blood. Because repeat testing helps researchers validate study findings, participants who have the unique red blood cell features mentioned above may also be asked if they are willing to return and donate another 2 cc to 8 cc of blood for additional studies. The amount of blood drawn will not exceed 50 ml with any eight-week period for adults or 7 cc within any six-week period for children.

Participants needed: 250
Trial details
Age: 18-100Biological sex: AllType: ObservationalSponsor: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)Updated: Jun 8, 2026Locations: 1
Eligibility criteria

Patients with sickle cell trait [+3]

Subjects who are unable to comprehend the investigational nature of the laborato... [+1]

Status: Recruiting

Rollover Study for Patients With Sickle Cell Disease Who Have Completed a Prior Novartis-Sponsored Crizanlizumab Study

This is a multi-center multi-national rollover study to allow continued access to crizanlizumab for patients with sickle cell disease (SCD) who are on crizanlizumab treatment in a Novartis-sponsored study (parent study) and are benefiting from the treatment as judged by the investigator.

Participants needed: 130
Trial details
Phase: Phase 4Age: 6-100Biological sex: AllType: InterventionalSponsor: Novartis PharmaceuticalsUpdated: Jun 8, 2026Locations: 31
Eligibility criteria

Written informed consent/assent, according to local guidelines, signed by the ad... [+2]

Patient had permanently discontinued from crizanlizumab study treatment in the p... [+5]

Status: Recruiting

Functional Ovarian Reserve in Sickle Cell Disease

This study aims to look at AMH levels in female children with SCD as they go through puberty to see if they are at the same level as other children without SCD at the same age and/or pubertal stage and will also look at how treatment exposures and pain crises affect the AMH levels in children with SCD. Primary Objective: * To evaluate whether AMH levels are lower in pre-teens and adolescent females with SCD when compared with healthy female controls (siblings, relatives, non-relatives of similar race/ethnicity) at the same age and pubertal stage. Secondary Objectives: * To evaluate whether AMH has a similar trajectory in female pre-teens and adolescents with SCD when compared with the general population and controls. * To describe pubertal timing, menstrual history, and markers of functional ovarian reserve (FOR), as well as prevalence of premature ovarian insufficiency (POI) as determined by medical history and laboratory markers in pre-teens and adolescents with SCD in comparison with their female controls. * To correlate AMH levels with FSH and estradiol levels, normal pubertal timing, and menstrual history in children and adolescents with SCD. * To correlate the severity of SCD (number of vaso-occlusive events) with pubertal timing, presence of normal vs abnormal menstruation, and laboratory markers of FOR, in pre-teens and adolescents with SCD. * To correlate the use of SCD modifying treatment modalities with pubertal timing, menstrual pattern, and laboratory markers of FOR in pre-teens and adolescents with SCD.

Participants needed: 440
Trial details
Age: 10-18Biological sex: FemaleType: ObservationalSponsor: St. Jude Children's Research HospitalUpdated: Jun 4, 2026Locations: 1
Eligibility criteria

Sickle cell disease of any genotype or a healthy sibling, relative, household me... [+2]

History of hematopoietic stem cell transplantation or gene therapy prior to enro... [+2]

Status: Recruiting

A Phase 1b, Open-Label Study of DISC-3405 in Participants With Sickle Cell Disease (SCD)

This is an open-label, multicenter, within-participant dose-escalation study examining up to 3 dose levels of DISC-3405 and will assess the safety, tolerability, PK, and PD of DISC 3405 in participants with sickle cell disease.

Participants needed: 24
Trial details
Phase: Phase 1Age: 18+Biological sex: AllType: InterventionalSponsor: Disc Medicine, IncUpdated: Jun 4, 2026Locations: 7
Eligibility criteria

Aged 18 years or older at the time of signing the informed consent form (ICF). [+17]

Participants who are receiving regularly scheduled blood (RBC) transfusion thera... [+17]