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 1/Phase 2, Phase 2 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT03047369Recruiting
Myelin brain disorder research biobank for samples and data
This study collects brain-related medical information and biological samples to help researchers better understand leukodystrophies and other white-matter brain disorders. It may help future diagnosis and treatments by building a valuable “biobank” of patient data and samples.
Palo Alto, CaliforniaAges Any age - NCT07003100Recruiting
Studying mogamulizumab rash in mycosis fungoides or sezary syndrome
This study looks at a common skin rash caused by the drug mogamulizumab in patients with certain types of lymphoma. It aims to learn more about the rash and how to manage it, so your experience can help future patients.
Duarte, CaliforniaAges 18 years+ - NCT06708429Recruiting
Lynch syndrome and gut immune system study
This study looks at how the immune system interacts with the gut lining in people with Lynch syndrome and those without. It may help us better understand how Lynch syndrome affects the body.
Monrovia, CaliforniaAges 18 years+ - NCT04930653RecruitingPhase 2
Photopheresis plus mogamulizumab for advanced skin lymphoma
This Phase 2 trial tests whether a combination of photopheresis and the drug mogamulizumab can improve outcomes in adults with advanced mycosis fungoides or Sézary syndrome, which are types of skin T-cell lymphoma. It may help by targeting lymphoma cells in the skin and immune system.
Duarte, CaliforniaAges 18 years+ - NCT07582172RecruitingPhase 2
Stem Cell Transplant for Hard-to-Treat Blood Cancers in Older Adults
This trial tests a new combination of radiation and chemotherapy to prepare your body for a stem cell transplant from a matched donor. It's designed for older patients with acute myeloid leukemia (AML) or myelodysplastic syndrome (MDS) that hasn't responded well to standard treatments.
Duarte, CaliforniaAges 18 years+ - NCT05702645Recruiting
Down syndrome long-term study after leukemia treatment
This study follows children and young adults with Down syndrome who have survived acute leukemia (ALL or AML) to learn about their longer-term health after treatment ends. It may help families and doctors understand what health problems to watch for and how to provide better follow-up care.
Oakland, CaliforniaAges 6–39 - NCT05432349Recruiting
Rett syndrome genetic registry for MECP2 changes
This trial is a registry that collects health and genetic information from people with Rett syndrome. It may help researchers better understand how MECP2 loss-of-function changes lead to symptoms and how to support patients.
Oakland, CaliforniaAges birth–99 years - NCT05292664RecruitingPhase 1
Venetoclax trial for high-risk blood cancers in young patients
This Phase 1 study tests venetoclax to treat certain high-risk blood cancers in children, teens, or young adults. It is designed to see if the drug can work safely for patients whose disease has returned or did not respond to prior treatment.
San Francisco, CaliforniaAges 1–40 - NCT07519395RecruitingPhase 2
Camlipixant for IBS with diarrhea or mixed symptoms
This study tests an investigational drug, camlipixant, to see if it can reduce belly pain and diarrhea or mixed bowel symptoms in adults with irritable bowel syndrome (IBS). If you've tried other IBS treatments without enough relief, this might be an option.
San Diego, CaliforniaAges 18–80 - NCT07523581RecruitingPhase 2
Study of an experimental drug for Alport syndrome
This study tests an experimental medicine for people with Alport syndrome caused by a specific type of gene change (nonsense mutation). The drug may help reduce protein in the urine and slow kidney decline. It is a blinded study, so you won't know if you get the real drug or a placebo.
Stanford, CaliforniaAges 12 years+ - NCT06789913RecruitingPhase 2
Testing RLY-2608 for growth disorders linked to PIK3CA mutations
This trial tests a new medicine, RLY-2608, that targets the specific genetic change (PIK3CA mutation) causing overgrowth conditions. It aims to see if the drug can slow or stop the growth of affected tissues.
Palo Alto, CaliforniaAges 2 years+ - NCT06701682RecruitingPhase 2
Study of vilobelimab for moderate to severe ARDS
This trial tests a drug called vilobelimab for people with moderate or severe ARDS (a serious lung condition). It aims to find if this treatment can help improve breathing and outcomes.
Fresno, CaliforniaAges 18 years+ - NCT06701669RecruitingPhase 2
Study of Paridiprubart for moderate to severe ARDS
This trial tests a new medicine called paridiprubart to see if it can help people with moderate or severe acute respiratory distress syndrome (ARDS), a serious lung condition. It may be an option if you have low oxygen levels and no known allergy to the drug.
Stanford, CaliforniaAges 18 years+ - NCT06701656RecruitingPhase 2
Testing bevacizumab for breathing problems from ARDS
This trial tests if bevacizumab can help people with ARDS (a serious lung condition) breathe better. It is for patients with mild, moderate, or severe ARDS who are already in the hospital.
Fresno, CaliforniaAges 18 years+ - NCT06703073RecruitingPhase 2
Testing new treatments for acute respiratory distress syndrome (ARDS)
This trial is testing new treatments for people with ARDS, a serious lung condition. The goal is to find therapies that help patients breathe better and recover faster. If you or a loved one has ARDS, this study may offer access to experimental treatments.
Fresno, CaliforniaAges 18 years+ - NCT05932589Recruiting
Study of brain signals as signs of Rett syndrome
This study measures brain and nerve activity (brain signals) to find patterns that match Rett syndrome. It may help researchers better track Rett changes over time and develop more precise ways to measure response in future treatments.
Los Angeles, CaliforniaAges 1–18 - NCT05535361Recruiting
Testing a bowel device for short bowel syndrome patients
This trial studies whether the Eclipse XL1 system is safe and may help people with short bowel syndrome, in both children and adults. It will check how well the approach works and watch for side effects over the study period.
Palo Alto, CaliforniaAges 3 months–65 years - NCT03303716Recruiting
Study of the health history of people with ASXL disorders
This study looks at your medical history and health changes over time in people diagnosed with an ASXL-related disorder. It may help researchers better understand how these conditions progress and what needs to be measured in future treatments.
Los Angeles, CaliforniaAges Any age - NCT05127616Recruiting
Trial for chronic pelvic pain: CBT vs education/support
This study tests whether structured talking therapy (CBT) or education/support helps reduce chronic pelvic pain problems in adults. It compares two approaches over time and uses symptom diaries and follow-up check-ins to see which works better.
Los Angeles, CaliforniaAges 18–70 - NCT04923477Recruiting
Exercise study for shoulder tendon pain and pinching
This trial studies a specific therapeutic exercise program for rotator cuff tendon pain and subacromial pain (a pinching-type shoulder problem). It also looks at what changes in your symptoms and body function after the exercises.
Los Angeles, CaliforniaAges 18–55 - NCT04726241RecruitingPhase 1/Phase 2
Testing blood and bone marrow samples in young leukemia patients
This trial looks at blood and bone marrow samples from children and teens whose leukemia has come back or is hard to treat. The goal is to better understand the disease and guide future options for these patients.
Downey, CaliforniaAges Up to 22 years - NCT06776783RecruitingPhase 3
Testing a new surfactant for breathing problems in premature babies
This study tests a new medicine called APC-0101, a type of surfactant, for premature babies with breathing problems (respiratory distress syndrome). It may help their lungs work better and reduce the need for more breathing support.
La Jolla, CaliforniaAges 1 hour–1 day - NCT07643896Recruiting
Blood test for pregnancy risk assessment using fetal cells
This study tests a new blood test that looks for fetal cells in your bloodstream to check your baby's health during pregnancy. The test is non-invasive—just a regular blood draw—and aims to help identify pregnancy risks earlier than traditional methods.
Riverside, CaliforniaAges Any age - NCT01403402Recruiting
Study of congenital muscle disease patients and their families
This trial collects health information from patients with certain inherited (genetic) muscle diseases and from their families. It may help researchers better understand the disease and improve care by learning what symptoms and treatments patients experience over time.
Lakewood, CaliforniaAges Any age
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.
- Community Regional Medical Center · 4 studies
- Long Beach Memorial Medical Center · 4 studies
- Stanford Medical Center · 4 studies
- University of California Davis Medical Center - Pulmonary Medicine · 4 studies
- University of California, Irvine · 4 studies
- City of Hope · 3 studies
- Rady Children's Hospital · 3 studies
- Stanford University · 3 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.