Clinical trials · California
Down Syndrome clinical trials in California
We’re tracking 263 recruiting down syndrome studies with a site in California — including Phase 1/Phase 2, Phase 2, Phase 2/Phase 3 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT05918861RecruitingPhase 3
Tested heart-risk drug for people with recent heart-attack genetics
This trial studies whether dalcetrapib can lower future heart and blood-vessel risk in people who recently had an ACS (acute coronary syndrome, often a heart attack or unstable chest pain) and have a specific genetic marker. It may help people like you by targeting a risk pathway related to that genetic background.
Santa Barbara, CaliforniaAges 45 years+ - NCT05922761RecruitingPhase 2
Belumosudil for lung scar prevention or treatment after transplant
This Phase 2 study tests belumosudil to treat or prevent bronchiolitis obliterans (BOS), a lung complication that can happen after a stem cell transplant. If you qualify, you would be checked closely with breathing tests and scans, and watched for safety and whether lung function improves or stays stable.
Stanford, CaliforniaAges 18 years+ - NCT05905328RecruitingPhase 1/Phase 2
New drug to prevent and treat side effects of CAR T-cell therapy
This study tests an experimental drug, CTO1681, that may help prevent or treat cytokine release syndrome (CRS) — a common side effect of CAR T-cell therapy. It could make the recovery period safer and more comfortable.
Orange, CaliforniaAges 18 years+ - NCT05905926Enrolling by invitationPhase 3
Tenapanor safety study for teens with constipation-predominant IBS
This trial checks the safety of tenapanor in children and teens (ages 6 to under 18) with IBS-C. It is only for people who finished a previous related study and agreed to continue follow-up.
Anaheim, CaliforniaAges 6–18 - NCT05849662RecruitingPhase 1/Phase 2
Trametinib plus azacitidine for newly diagnosed JMML
This trial studies whether trametinib and azacitidine can control juvenile myelomonocytic leukemia (JMML) soon after diagnosis. It’s designed to test safety and how well the treatment works in children and young adults who meet specific leukemia and genetic criteria.
Los Angeles, CaliforniaAges 1 month–21 years - NCT05737121RecruitingPhase 2
Study drug for bladder pain compared with lidocaine, heparin, or placebo
This Phase 2 trial tests VNX001 to see if it helps people with interstitial cystitis/bladder pain syndrome (IC/BPS) compared with its separate ingredients (lidocaine and heparin) or a placebo (inactive treatment). You may be eligible if you have had IC/BPS for months and recently had a moderate-to-severe bladder pain flare.
Escondido, CaliforniaAges 18 years+ - NCT05724173Recruiting
Test of a brain-to-computer device for ALS hand paralysis
This study checks whether a brain-computer interface (a BrainGate2 system) is safe and workable for people with ALS. If you qualify, you may be asked to try the device and complete study tasks to help researchers learn how well it can support communication or control.
Stanford, CaliforniaAges 18–80 - NCT05194397RecruitingPhase 2
Exercise plus NR supplement to boost fitness after stem-cell transplant
This trial tests whether a supervised exercise program, plus an NR supplement, can improve fitness in young people who have had an allogeneic (donor) stem-cell transplant for certain blood cancers or bone marrow conditions. It’s meant to help with energy and physical ability while monitoring safety.
Duarte, CaliforniaAges 10–30 - NCT05701917Recruiting
Clot-busting device versus blood thinners for leg clot
This study compares a clot-removal device (ClotTriever) plus standard care versus standard blood thinners alone for a deep vein clot in the leg. It aims to see which approach better improves leg symptoms and outcomes.
Orange, CaliforniaAges 18 years+ - NCT05654922RecruitingPhase 3
Prevent lung transplant airways scarring with ARINA-1
This Phase 3 trial tests ARINA-1 to slow or prevent worsening lung transplant scarring in the breathing tubes (bronchiolitis obliterans). It may help people who are showing early decline in lung function but are not yet at advanced disease.
Los Angeles, CaliforniaAges 18–75 - NCT05594992Enrolling by invitationPhase 3
Study extension of JR-141 for long-term Hunter syndrome safety
This is a follow-up study for people who already took JR-141 in an earlier trial for Hunter syndrome (MPS II). It checks how well the treatment works over the long term and monitors long-term safety.
Oakland, CaliforniaAges Any age - NCT05635747Enrolling by invitation
90-day follow-up study for children using RELiZORB
This study follows children who are already taking RELiZORB to see how it’s going over time and whether it remains safe and tolerable, with effects on nutrient absorption. It doesn’t change treatment—it mainly looks at outcomes during the next 90 days.
Los Angeles, CaliforniaAges 2–18 - NCT05564390RecruitingPhase 2
MyeloMATCH screening to match you to AML or MDS treatment
This study screens people with newly suspected acute myeloid leukemia (AML) or myelodysplastic syndrome (MDS) to see which treatment approach fits best—either a specific study treatment or standard care. It may help by directing you to the right option and by sharing your blood/bone marrow samples for research.
Berkeley, CaliforniaAges 18 years+ - NCT05575401Recruiting
Track surgery results in kids getting tonsil removal
This trial looks at how well a specific throat surgery technique works in children who are having their tonsils removed (with or without removing adenoids). It may help improve how doctors choose and perform surgery for safer, better recovery.
Murrieta, CaliforniaAges 3–17 - NCT05267821RecruitingPhase 2/Phase 3
Testing anakinra to reduce inflammation in pediatric sepsis MODS
This study tests whether a medicine called anakinra can “turn down” harmful inflammation in children with severe illness from sepsis. It aims to improve organ function when multiple organs are starting to fail.
San Francisco, CaliforniaAges 1 day–17 years - NCT05219110Recruiting
More fluids for children sick with toxin E. coli
This study looks at whether giving extra (hyper) fluids early helps children with a high-risk E. coli stomach infection. The goal is to improve outcomes by supporting the kidneys during the illness.
Sacramento, CaliforniaAges 9 months–21 years - NCT05184842RecruitingPhase 2
Weekly low-dose decitabine plus venetoclax for MDS or AML
This Phase 2 study tests a gentler weekly combination of two medicines—decitabine and venetoclax—for people with MDS, AML, or MDS/MPN. The goal is to improve blood counts and disease control while reducing side effects compared with more harsh treatments.
Sacramento, CaliforniaAges 18 years+ - NCT05107635Recruiting
Registry for people treated with AtriCure for IST or POTS
This registry collects information from people who are getting—or already had—treatment for IST or POTS using an AtriCure device. It helps researchers better understand outcomes and safety in real-world care.
Loma Linda, CaliforniaAges 18–100 - NCT05003986RecruitingPhase 2
Sparsentan for children with protein leaking kidney diseases
This Phase 2 study tests sparsentan in children with certain kidney diseases that cause high amounts of protein in the urine. It aims to see if the medicine can reduce kidney damage signals and protein leakage compared with standard care.
Los Angeles, CaliforniaAges 1–17 - NCT05023005Recruiting
Strain-Counterstrain therapy for piriformis muscle pain
This trial tests a hands-on physical therapy technique called “strain-counterstrain” to reduce pain from the piriformis muscle. It may help people whose pain is coming from that specific muscle rather than the low back.
Loma Linda, CaliforniaAges 18–65 - NCT04988555RecruitingPhase 1/Phase 2
Study of an investigational drug for high-risk acute leukemia
This Phase 1/2 study tests enzomenib (DSP-5336) in people with relapsed or hard-to-treat acute leukemia (and, in some places, certain other blood cancers). The goal is to see how the drug works and how safe it is, especially for leukemia cases with specific genetic changes (KMT2A/MLL or NPM1).
Newport Beach, CaliforniaAges 12 years+ - NCT04771130RecruitingPhase 1/Phase 2
Study of BGB-11417 for blood cancers
This early-phase study tests BGB-11417 in people with certain bone-marrow (blood) cancers such as AML, MDS, or MDS/MPN. The goal is to find out how the medicine works and whether it can control the cancer.
Duarte, CaliforniaAges 18 years+ - NCT04681781Enrolling by invitation
Remote study of SLC13A5 deficiency history
This study follows people with SLC13A5 deficiency to better understand how the condition changes over time, using surveys and clinical check-ins done remotely. If you (or your child) have this genetic condition, it may help researchers learn what symptoms to expect and how to track them.
Palo Alto, CaliforniaAges Any age - NCT04546399RecruitingPhase 2
Blinatumomab with or without nivolumab for first relapse ALL
This study compares blinatumomab alone versus blinatumomab plus nivolumab in young people whose B-cell ALL has returned for the first time. It aims to see whether adding nivolumab improves control of the leukemia after relapse.
Downey, CaliforniaAges 1–30
Down Syndrome trials by city in California
Where these studies are running in California
Institutions with a site for the recruiting down syndrome studies listed above.
- University of California, Davis · 4 studies
- Cedars-Sinai Medical Center · 3 studies
- Children's Hospital Los Angeles · 3 studies
- City of Hope · 3 studies
- Children's Hospital of Orange County · 2 studies
- Kaiser Permanente-Oakland · 2 studies
- Loma Linda University Health · 2 studies
- Rady Children's Hospital · 2 studies
What taking part in a down syndrome study involves
A screening visit first
Before anything else, the study team checks whether you fit — usually a visit with some tests. You can stop at any point, and screening is typically free.
Care at a nearby site
Study visits happen at a clinic or hospital taking part. Many studies cover the cost of the study treatment and related visits, and some reimburse travel.
You stay in control
Taking part is voluntary and you can leave a study at any time, for any reason, without affecting your regular care.
The team decides eligibility
Our fit check is a helpful first read, not a decision. The study team makes the final call after reviewing your health history.
Down Syndrome trials in other states
Common questions
- Are there down syndrome clinical trials in California?
- Yes. We're currently tracking 263 recruiting down syndrome studies with a site in California, each rewritten in plain language so you can see what it's testing and who it's for.
- How do I find out if I qualify for a down syndrome study in California?
- Each study lists its eligibility rules — age, diagnosis, prior treatments. On every trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Do I have to live in California to take part?
- Not necessarily. These studies have a site in California, but eligibility is about your health, not your address — some people travel to take part, and a few studies reimburse travel. The study team can tell you what's required.
- Does it cost anything to join a down syndrome trial?
- Using Clin2 is always free. Many trials cover the study treatment and related visits; some reimburse travel. The study team explains exactly what's covered before you decide.
Not the right time?
New down syndrome studies open in California regularly. Set up a health profile and we’ll quietly watch for studies that fit you and email you when one opens.
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.