Chromosomal disorder

This phase 3 trial compares a once-weekly growth hormone injection (lonapegsomatropin) to a daily one (somatropin) in 186 prepubertal children with growth failure due to Turner syndrome, SHOX deficiency, being small for gestational age, or idiopathic short stature. The goal is to…

This study tests whether adding AGuIX gadolinium-based nanoparticles to standard brain radiation can better control brain metastases that are at high risk of coming back. About 134 adults with certain cancers (like melanoma, lung, breast, or colorectal) that have spread to the br…

This study tests a 6-month family-based program called HomeGrown, designed to help parents of young children (ages 2-6) with Down syndrome create healthier home environments. Families get online tools, resources, and monthly coaching calls to improve nutrition and physical activi…

This phase 2 trial is testing whether adding nivolumab to blinatumomab helps children and young adults (ages 1 to 30) with relapsed B-cell acute lymphoblastic leukemia (B-ALL), including those with Down syndrome. Blinatumomab helps the immune system find and kill cancer cells, wh…

This study tests an experimental vaccine called ACI-24.060 in people with early Alzheimer's and non-demented adults with Down syndrome. The vaccine is designed to help the immune system clear amyloid plaques from the brain, which are linked to Alzheimer's. Researchers will check …

This early-phase trial tests a stem cell product called EN001 in 27 adults with Charcot-Marie-Tooth disease type 1A, a genetic nerve disorder that causes muscle weakness. The study has two parts: first, an open-label phase to check safety and find the right dose; second, a placeb…

This study tests whether tofacitinib, a drug used for arthritis, can improve thinking skills and immune function in people with Down syndrome aged 6 to 22. Half of the 92 participants will receive the drug for 6 months, and the other half a placebo. Researchers will measure chang…

This study tests a new drug, rocbrutinib, against another drug, pirtobrutinib, in people with chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL) whose cancer has returned or stopped responding to treatment. All participants have already tried a type of BTK inh…

This early-stage trial tests an experimental drug called CSTI-500 in 12 people aged 13 to 50 with Prader-Willi syndrome, a genetic condition that causes constant hunger and behavioral issues. The study aims to see if the drug is safe and can reduce excessive eating behaviors. Par…

This study tests a stem cell transplant for people with common variable immunodeficiency (CVID) and other immune disorders. The goal is to replace the faulty immune system with a healthy donor's stem cells. Participants are aged 5 to 40 and will receive a reduced-intensity transp…

This study tests whether adjusting sex hormone levels with aromatase inhibitors can improve metabolic health and sperm production in men with Klinefelter syndrome. It also examines if adding semaglutide (a weight-loss drug) or hCG provides extra benefits. The trial involves 150 m…

This early-stage trial tests a new drug called EDK060 in 28 adults with Charcot-Marie-Tooth type 1A, a genetic nerve disorder. Participants receive a single dose of EDK060 or a placebo to check safety and how the drug moves through the body. The goal is to see if EDK060 is safe e…

This study tests whether matching sleep apnea treatment to the specific cause in each person with Down syndrome works better than a one-size-fits-all approach. 200 children and adults will receive either a combination of two drugs (ato-oxy) or oxygen therapy based on their indivi…

This study tests a special stem cell transplant for children and adults with blood cancers like leukemia. The transplant uses stem cells that have had certain immune cells removed to lower the risk of graft-versus-host disease, a serious complication. About 70 participants will r…

This phase 2 trial is testing a combination of five drugs (fludarabine, cytarabine, filgrastim-sndz, gemtuzumab ozogamicin, and idarubicin) in 270 people with newly diagnosed acute myeloid leukemia or high-risk myelodysplastic syndrome that have specific genetic changes. The goal…

This study tests whether probiotics and prebiotics can safely help control appetite and weight gain in 60 children with Prader-Willi syndrome, a rare genetic condition that causes severe obesity. Researchers will measure changes in body mass index, body fat, and gut bacteria over…

This study tests a new drug called ION440 in 48 people with MECP2 duplication syndrome, a rare genetic condition that causes intellectual disability and seizures. The drug is given via a spinal injection to see if it is safe and how the body processes it. Some participants will r…

This study looks at thinking and mental health issues in people with Velocardiofacial, Williams, and Fragile X syndromes. Researchers will test how well medications like methylphenidate, fluoxetine, and risperidone improve these symptoms. The goal is to better understand and trea…

This study tests a 16-week inclusive exercise program called PACE for adults with intellectual disability. Participants will attend fitness classes, meet with coaches, and use a web dashboard to set goals. The trial includes 376 people and will measure daily steps and moderate-to…

This study compares personalized surgery guided by a special camera during sleep (DISE) to standard tonsil and adenoid removal for treating obstructive sleep apnea in 303 children with Down syndrome, ages 2 to 17. Sleep apnea is very common in these children and standard surgery …

This study tests a daily pill called abrocitinib for people with Down syndrome who have eczema or a type of hair loss. About 56 participants will take the drug for up to 60 weeks to see if it safely controls their skin or scalp condition. The goal is to manage symptoms, not cure …

This Phase 3 trial tests a treatment called corneal crosslinking (CXL) for people with Down syndrome who have keratoconus, a condition where the cornea thins and bulges, blurring vision. The procedure uses vitamin B2 eye drops and ultraviolet light to strengthen the cornea. Resea…

This Stanford study tests whether injecting a man's own platelet-rich plasma (PRP) into his testicles can help produce sperm. Ten men with nonobstructive azoospermia who previously failed sperm retrieval will receive the injection. Three months later, doctors will check for sperm…

This phase 2 trial tests the drug venetoclax (a pill) in 110 people with relapsed or refractory chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL). The study includes two groups: those with a specific genetic change (17p deletion) and those who have failed oth…

This study tests a weekly injection called RM-718 in healthy people with obesity and in patients with obesity caused by problems in the MC4R pathway, including hypothalamic obesity and Prader-Willi syndrome. The main goal is to check the drug's safety and how the body processes i…

This study offers boys aged 0-17 the chance to freeze testicular tissue before undergoing treatments like chemotherapy or radiation that could cause permanent infertility. The tissue is stored for potential future use to achieve pregnancy. Researchers will track whether transplan…

This study is testing a specific set of four chemotherapy blocks in children (0-18 years) who have both acute myeloid leukemia (AML) and Down syndrome. The goal is to see if this tailored treatment can improve long-term survival and reduce harsh side effects compared to past appr…

This study tests a new early intervention called HEP (Homeostasis-Enrichment-Plasticity) for infants with Down syndrome, ages 4 to 12 months. The approach is child-centered and family-based, focusing on enriched environments and brain plasticity. Over 12 sessions, researchers wil…

This study tests whether adding hands-on cooking classes to a standard weight loss program helps young adults (18-35) with mild-to-moderate intellectual disabilities lose more weight and keep it off. Over 24 months, 114 participants will either follow a healthy eating plan with c…

This study tests tirzepatide, a weight loss medication, in 36 young adults aged 18-26 with obesity from Prader-Willi syndrome, hypothalamic obesity, or general causes. Participants take the drug for 48 weeks to see how much weight they lose and how their health changes. The goal …

This study tests a new way to treat large brain tumors using two different radiation machines. Patients get four daily treatments with a linear accelerator, then a break, followed by one precise Gamma Knife treatment. The goal is to better control tumors while protecting healthy …

This study is testing a new blood test that looks for fetal cells in the mother's blood to detect genetic conditions like Down syndrome. The test will be compared to standard diagnostic methods such as amniocentesis or newborn testing. The study involves 1,000 pregnant individual…

This study looks at whether losing weight can help prevent or delay Alzheimer's disease in adults with Down syndrome. About 81 participants without dementia will either follow a reduced-calorie diet with monthly coaching or attend general health education sessions. Over 12 months…

This study tests if the drug levetiracetam can prevent epileptic seizures in 120 adults over 40 with Down syndrome and Alzheimer's disease. Participants will receive either the drug or a placebo for 96 weeks. The goal is to see if the drug can stop seizures and possibly slow brai…

This study is testing whether glasses prescriptions made by a computer analyzing detailed eye images can give better vision for children with Down syndrome than standard prescriptions from a routine eye exam. The study will enroll 24 children aged 5 to 12 with Down syndrome. Each…

This study tests whether a non-invasive brain stimulation technique called tDCS can help adults with Down syndrome who have depression with catatonia (a state of being unresponsive or stuck). 62 participants will receive either real or fake (sham) tDCS for 15 sessions over 5 days…

This study tests a group program to help teens (ages 13-17.5) with Prader-Willi Syndrome and their families learn practical ways to handle irritability, meltdowns, and anxiety. Ten participants will attend weekly 90-minute sessions. The goal is to see if the program improves emot…

This study tests whether two months of drumming lessons can improve self-control and timing skills in children with Down syndrome. Thirty children aged 7 to 15 will take lessons from a professional drummer and complete computer tasks and brain recordings. The goal is to see if rh…

This study tests whether bright light therapy can help reduce excessive daytime sleepiness in people with Prader-Willi syndrome. About 50 participants will receive either bright light or a dim placebo light. The goal is to see if the therapy improves alertness, mood, and behavior…

This study tests whether an animal-themed play program can improve kinesthesia (body movement awareness) in children with Down syndrome, ages 6-9. Researchers will measure joint position sense before and after the program. The goal is to see if playful animal activities help thes…

This study tests whether playing a bean bag tossing game on a wedge or a balance board can improve balance and walking in children with Down syndrome. Thirty-six children aged 7-12 will be split into two groups and play the game for 30 minutes, three times a week, for four weeks.…

This study compares three methods to reduce pain during corticosteroid injections for arthritis, tendinopathy, or nerve compression in the hand, wrist, or elbow: no anesthesia, a vibrating device, or a cooling spray. Each participant will receive two of the three methods to see w…

This study tests a new drug called AEF0217 to see if it can improve daily living skills in adults and older teens with Down Syndrome. About 188 participants will take either the drug or a placebo daily for 24 weeks. Researchers will check changes in behavior, thinking, and qualit…

This study looks at whether the OTAGO exercise program can improve balance, endurance, and motor coordination in children with Down syndrome. Researchers will work with 30 children aged 8 to 14 who have mild to moderate intellectual disability. Over ten months, the children will …

This study tests a mindfulness-based therapy designed to improve sleep in people with Down syndrome (age 12+). The program is adapted with visual aids, shorter meditations, and caregiver support. Researchers will compare it to a brief behavioral therapy in 20 participants, measur…

This Phase 3 trial tests whether pitolisant can reduce excessive daytime sleepiness in people aged 6 and older with Prader-Willi syndrome. About 134 participants will receive either pitolisant or a placebo, and researchers will also look at effects on behavior and appetite. The s…

This study tests a special nasal airway device (ssNPA) in 40 children with weak throat muscles and obstructive sleep apnea, including those with Down syndrome. The device is designed to keep the airway open during sleep without needing surgery. Researchers will measure how well i…

This study looks at whether jumping rope can improve foot posture in children with Down syndrome. Researchers will include 32 children aged 4 to 15 who have flat feet. One group will jump rope and play, while the other group only plays. Foot changes will be measured before and af…

This study compares two types of exercise—cognitive-motor training (combining thinking tasks with movement) and Pilates—to see which better improves balance in children with Down syndrome. Thirty-two children aged 8 to 13 will be randomly assigned to one of the two groups and tra…

This study tests a virtual behavioral therapy (Functional Behavioral Training) for children aged 2-12 with genetic syndromes like Fragile X, Angelman, or Rett syndrome who have challenging behaviors. The therapy teaches parents how to identify what triggers problem behaviors and …

This study tests whether taking creatine and HMB supplements for 8 weeks can improve muscle strength, balance, and body composition in people with Down syndrome. Fifty participants will receive either the supplements or a placebo, along with nutrition education. Researchers will …

This study compares two methods of delivering oxygen during sleep in children aged 5-17 with Down syndrome and moderate to severe obstructive sleep apnea. Ten participants will have two sleep studies—one with continuous oxygen flow and one with pulse flow from a portable concentr…

This study tests whether a noninvasive technique called transcranial magnetic stimulation (TMS) can change brain activity related to hunger and fullness in people with Prader-Willi syndrome. Researchers will stimulate a part of the brain called the cerebellum and measure changes …

This study tests whether a gentle brain stimulation technique called tACS, used at home for 5 days a week over 4 weeks, can improve memory and thinking in 40 young people aged 14-25 with 22q11.2 deletion syndrome. The stimulation is personalized based on each participant's MRI an…

This study looks at two types of exercise—Cuevas Medak Exercises and Rebound Exercises—to see which one better improves physical fitness in children with Down syndrome. About 22 kids aged 3 to 8 will take part in 12 weeks of supervised sessions. The goal is to find a fun and effe…

This study tests whether using a powerball (a small exercise ball) on a stable surface or on an unstable surface (BOSU ball) can improve upper limb endurance and coordination in children with Down Syndrome. Twenty-eight children aged 6-10 will do 30-minute sessions three times a …

This study tests whether Vojta therapy, a technique that involves gentle stimulation of specific body zones, can improve how children with Down syndrome walk and move. Twenty-eight children aged 2 to 10 will be randomly assigned to receive either Vojta therapy or no extra therapy…

This natural history study will follow 700 people with Down syndrome and their healthy relatives for up to 15 years. Researchers want to learn how removing part of the thymus during heart surgery affects the immune system over time. Participants will have yearly check-ups, blood …

This study gathers blood and bone marrow samples from 150 adults with myelodysplastic syndrome (MDS), a blood disorder that can turn into acute leukemia. Researchers want to find biological markers that help predict which patients are likely to progress to leukemia. The goal is t…

This study looks at how certain brain cells (cholinergic neurons) change with age in adults with Down syndrome, and how that relates to Alzheimer's disease risk. Researchers will use brain scans and EEGs to measure these changes in 30 adults aged 18-55 who do not have dementia. T…

This study aims to understand how the brain develops in children with Williams syndrome or 7q11.23 duplication syndrome, compared to healthy children. Researchers will use MRI scans and cognitive tests to track changes over time. The goal is to learn how these genetic variations …

This study looks at how using very short, simple sentences (like single words or telegraphic speech) affects how young children with Down syndrome process language and learn new words. Researchers will show children pictures and play recordings of different types of sentences to …

This observational study follows up to 2,000 people with Williams syndrome or related chromosome changes, along with their family members. Researchers will track health, development, behavior, and quality of life from childhood through adulthood. They are also building a biobank …

This study looks at blood vessel health in adults with Down syndrome (ages 18-35) compared to adults without Down syndrome. Researchers want to find out if people with Down syndrome have hidden changes in their blood vessels that could raise their risk for heart disease or stroke…

This long-term study will follow up to 1,400 people with Down syndrome of all ages to better understand their health, development, and daily experiences. Participants and their caregivers will answer questions, share medical records, and may provide blood or saliva samples. Some …

This observational study aims to find biological markers (biomarkers) for RAI1-related disorders, including Smith-Magenis and Potocki-Lupski syndromes. Researchers will study 90 participants through clinical exams, blood tests, optional skin biopsies, and sleep studies. The goal …

This study aims to learn more about the medical and behavioral effects of two rare genetic conditions: 3q29 deletion and 3q29 duplication syndromes. Researchers will collect health and behavior data from 800 participants, including those with the syndromes and healthy siblings. T…

This study enrolls adults with Down syndrome ages 25-55 into a ready-to-test group. Researchers will track memory, thinking, and brain changes over time to better understand how Alzheimer's disease develops in this population. The goal is to make future clinical trials faster and…

This study looks at how the autonomic nervous system—which controls heart rate and blood pressure—works in people with Down syndrome. Researchers will measure stress responses using virtual reality, cold water, pain patches, caffeine, and exercise in 200 participants. The goal is…

This study looks at the long-term health of people with Down syndrome who have been treated for acute leukemia. Researchers want to understand what chronic health problems survivors may face and what factors contribute to them. The goal is to create better follow-up care guidelin…

This study is testing whether a program delivered remotely (by video or phone) that combines exercise and dementia caregiving support is practical and helpful for older adults with Down syndrome and their caregivers. About 40 participants will take part. The goal is to see if the…

This study looks at how often people with Charcot-Marie-Tooth disease (CMT) have problems with their autonomic nervous system, which controls things like heart rate and sweating. Researchers will use questionnaires and simple, non-invasive tests to measure these symptoms in 50 ad…

This study looks at embryos that were found to have extra or missing chromosomes (aneuploidy) or a mix of normal and abnormal cells (mosaicism) during genetic testing. Researchers want to see how often these embryos lead to a healthy baby and whether the pregnancy or child has an…

This study looks at medical records of 1000 children with conditions like autism, epilepsy, and Down syndrome to find common biological patterns. Researchers want to understand what causes these disorders and how children respond to treatments. The goal is to improve diagnosis an…

This study aims to find early biological markers (biomarkers) for Charcot-Marie-Tooth disease type 1A (CMT1A), a common inherited nerve disorder. Researchers will analyze blood and nerve samples from 70 people aged 10-30 with CMT1A, along with animal models, to identify signs tha…

This study is collecting blood and other samples from 5,000 children and young adults (under 21) who are already taking certain medications as part of their regular care. The goal is to understand how these drugs move through and affect children's bodies, so doctors can prescribe…

This study looks at 30 six-month-old infants with Down syndrome to see if their sucking patterns are linked to the severity of obstructive sleep apnea (OSA). Researchers will measure sucking bursts and compare them to sleep study results. The goal is to find a simple way to scree…

This study explores whether a non-invasive method using light, sound, and vibration can safely change brain activity in adults with Down syndrome. Researchers will measure brain waves and check for side effects during a single 30-60 minute session. The goal is to see if this appr…

This study looks at how a 2-week, personalized therapy program helps children aged 4-12 with conditions like cerebral palsy, autism, or genetic disorders. Kids get about 2.5 hours of tailored therapy each day, focusing on skills like movement, attention, and communication. The go…

This study follows 75 adults with CMT1A and 25 healthy volunteers over five years to track how the disease progresses. Researchers will analyze blood and skin samples to find biomarkers that could make future clinical trials faster and more reliable. The goal is to better underst…

This study looks at how nerves work in people with Charcot-Marie-Tooth disease and other nerve disorders like CIDP. Researchers will use special electrical tests and ultrasound to measure nerve and muscle changes. The goal is to better understand these conditions, not to test a n…

This observational study will follow 2000 children and adults with imprinting disorders—rare genetic conditions like Silver-Russell and Prader-Willi syndromes. Researchers aim to describe the natural history of these diseases and identify common metabolic profiles, risks for obes…

This study uses non-invasive eye scans (OCT and OCTA) to look for changes in the retina that might be linked to brain diseases like Alzheimer's, Parkinson's, and multiple sclerosis. Researchers aim to find early markers that could help diagnose or track these conditions. The stud…

This study looks at children with Down Syndrome who have pneumonia to see if there is a link between their immune system and how well they breathe. Researchers will measure immune markers in the blood and breathing rate and oxygen levels. The goal is to better understand these re…

This study is creating a large database to collect information on people with rare diseases like amyloidosis, sarcoidosis, and Gaucher disease. Researchers will track patients' health over time, including their symptoms, treatments, and outcomes. The goal is to improve diagnosis …

This study looks at how doctors currently screen and treat obstructive sleep apnea in children with Down syndrome at one hospital. By reviewing past records of 30 children, researchers hope to create a standard care plan that can be used across France. The goal is to improve brea…

This study is gathering medical and educational information from up to 4,000 people with chromosome 18 abnormalities and their families. The goal is to better understand these rare conditions and provide better resources and care. Participants must be at least one year old and in…

This study reviews medical records of 200 children with obstructive sleep apnea who had tonsil surgery. Researchers want to find out how often breathing problems happen after surgery, especially in children with obesity, Down syndrome, or other health issues. The goal is to bette…

This study looks at how hearing sensitivity (hyperacusis) might help language skills in children and adults with Williams syndrome. Researchers will use EEG and NIRS brain scans along with questionnaires to compare participants with Williams syndrome, Down syndrome, and typical d…

This study is re-testing embryos that were initially found to have three or more abnormal chromosomes (called complex or chaotic aneuploidy). Researchers want to see if some of these embryos are actually normal after a second, more careful biopsy and genetic analysis. If so, they…

This study creates a large collection of blood, saliva, urine, and other samples from 2,500 people with and without Down syndrome. The goal is to help researchers better understand Down syndrome and its related medical conditions. Participants must be between 6 months and 89 year…

This study collects medical information and biological samples (like blood or tissue) from up to 12,000 people with leukodystrophies—rare disorders that damage the brain's white matter. Researchers will use this data to find new genetic causes, develop biomarkers for future trial…

This study aims to find new genes that cause Charcot-Marie-Tooth disease (CMT) and discover why symptoms differ among people with the same genetic change. Researchers will analyze DNA from up to 1,050 participants to identify genetic modifiers and unknown causes. The goal is to b…

This study looks at whether doing a laser-assisted hatching procedure on Day 3 or Day 5 of embryo growth changes the genetic test results in IVF. About 200 people having IVF with genetic testing will take part. The goal is to see if timing affects embryo health and the accuracy o…