NCT06668805 · BioMarin Pharmaceutical
A Phase 2 Basket Study of Vosoritide in Children With Turner Syndrome, SHOX Deficiency and Noonan Syndrome With an Inadequate Response to Human Growth Hormone
What this study is about
The purpose of this basket study in children with Turner syndrome, SHOX deficiency, and Noonan syndrome is to evaluate the effect of 3 doses of vosoritide versus hGH on growth as measured by AGV after 6 months of treatment. The long-term effectiveness and safety of vosoritide at the therapeutic dose will be evaluated up to FAH.
View original scientific description
The purpose of this basket study in children with Turner syndrome, SHOX deficiency, and Noonan syndrome is to evaluate the effect of 3 doses of vosoritide versus hGH on growth as measured by AGV after 6 months of treatment. The long-term efficacy and safety of vosoritide at the therapeutic dose will be evaluated up to FAH.
Interventions
DRUG
Vosoritide Injection
Modified recombinant human C-type natriuretic peptide Vosoritide
Primary outcome measures
Change from baseline in Annualized Growth Velocity (AGV)
Time frame: At 6 months
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Participants must be ≥ 3 years old, and \< 11 years old (females) or \< 12 years old (males), at the time of signing the informed consent form 2. A genetically confirmed diagnosis of Turner syndrome, SHOX deficiency or Noonan syndrome. 3. A height assessment corresponding to a height Z-score of \> -2.00 SDs and ≤ -1.75 SDs (up to 20% of participants)/≤ -2.00 SDs (at least 80% of participants) in reference to the general population of the same age and sex. 4. Tanner Stage 1, at time of signing the ICF. 5. Have been receiving continuous hGH for the treatment of short stature associated with their condition for a minimum of 1 year immediately prior to enrollment and be receiving a dose of ≥ 0.35 mg/kg weekly, with no weight-based dosing changes in the last 6 months and none planned in the future. 6. Are willing to continue on hGH at their current dose for the Baseline Growth Phase, and for 2 years post randomization if randomized to the hGH arm. 7. Inadequate respo
Where
- Los Angeles, California
- Orange, California
- Aurora, Colorado
- Wilmington, Delaware
- Washington D.C., District of Columbia
- Miami, Florida
- Atlanta, Georgia
- Boise, Idaho
- Chicago, Illinois
- Indianapolis, Indiana
- Iowa City, Iowa
- Lexington, Kentucky
And 10 more locations — see the full list below.
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced May 11, 2026 · Source of record for eligibility and locations