A Study to Evaluate Long-Term Safety, Tolerability, & Efficacy of BMN 111 in Children With Achondroplasia (ACH) (ACH)

March 12, 2026 updated by: BioMarin Pharmaceutical

A Phase 2, Open-Label, Extension Study to Evaluate the Long-Term Safety, Tolerability, and Efficacy of BMN 111 in Children With Achondroplasia

This is a Phase 2, Open-Label, Extension Study to Evaluate the Long-Term Safety, Tolerability, and Efficacy of BMN 111 in Children with Achondroplasia. The primary objective is to evaluate the long-term safety and tolerability of daily SC injections of BMN 111 in children with ACH who have completed two years of treatment in the 111-202 study.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
30

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Australia
    • Victoria
      • Parkville, Victoria, Australia, 3052
        • Murdoch Children's Research Institute
  • France
      • Paris, France, 75015
        • Institut Necker
  • United Kingdom
      • London, United Kingdom, SE1 9RT
        • Guys & St. Thomas NHS Foundation Trust Evelina Hospital
  • United States
    • California
      • Oakland, California, United States, 94609
        • Children's Hospital & Research Center Oakland
      • Torrance, California, United States, 90509
        • Harbor - UCLA Medical Center
    • Illinois
      • Chicago, Illinois, United States, 60611
        • Ann and Robert H. Lurie Childrens Hospital of Chicago
    • Maryland
      • Baltimore, Maryland, United States, 21287
        • Johns Hopkins McKusick - Institute of Genetic Medicine
    • Tennessee
      • Nashville, Tennessee, United States, 37232-2578
        • Vanderbilt University
    • Texas
      • Houston, Texas, United States, 77030
        • Baylor College of Medicine

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

7 years and older (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Have completed 24 months of BMN 111 treatment in Study 111-202.
  • Parent(s) or guardian(s) are willing and able to provide written, signed informed consent. Subjects under the age of majority are willing and able to provide written assent (if required). Subjects who reach the age of majority in their country will be asked to provide their own written consent upon reaching the legal age of majority.
  • If sexually active, willing to use a highly effective method of contraception while participating in the study.
  • Females >= 10 years old or who have started menses must have a negative pregnancy test at baseline and be willing to have additional pregnancy tests during the study
  • Willing and able to perform all study procedures as physically possible
  • Parents/caregivers willing to administer daily injections to the subjects and complete the required training.

Exclusion Criteria:

  • Requires any investigational agent prior to completion of study period.
  • Have a condition or circumstance that, in the view of the Investigator, places the subject at high risk for poor treatment compliance or for not completing the study.
  • Concurrent disease or condition that, in the view of the Investigator, would interfere with study participation or safety evaluations for any reason.
  • Permanently discontinued BMN 111 during the 111-202 study.
  • Subject is pregnant at Baseline visit or planning to become pregnant (self or partner) at any time during the study.
  • Current chronic therapy with restricted medications.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: BMN 111 - Subcutaneous Injection
111-205 is an open-label, extension study. Subjects receive the same stable dose of BMN 111 received upon completion of the 111-202 study, initially up to 30 μg/kg. BMN 111 will be administered by weight-band dosing regimen.
Drug: BMN 111
BMN 111 will be administered subcutaneously daily.
Other Names:
  • Vosoritide
  • Modified recombinant human C-type natriuretic peptide

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Incidence of Treatment-Emergent Adverse Events [Safety and Tolerability]
Time Frame: Until near final adult height is reached, and up to at least 16 years of age for females and 18 years of age for males, whichever occurs later
  • Number of study participants with treatment-emergent adverse events.
  • Number of study participants with treatment-emergent serious adverse events
Until near final adult height is reached, and up to at least 16 years of age for females and 18 years of age for males, whichever occurs later

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Growth Velocity [Efficacy]
Time Frame: Until near final adult height is reached
Annualized growth velocity (cm/yr)
Until near final adult height is reached
Growth Parameters (Efficacy)
Time Frame: Until near final adult height is reached, and up to at least 16 years of age for females and 18 years of age for males, whichever occurs later
Height standard score (Z-score)
Until near final adult height is reached, and up to at least 16 years of age for females and 18 years of age for males, whichever occurs later
Body Proportions (Efficacy)
Time Frame: Until near final adult height is reached, and up to at least 16 years of age for females and 18 years of age for males, whichever occurs later
Upper-to-lower body segment ratio
Until near final adult height is reached, and up to at least 16 years of age for females and 18 years of age for males, whichever occurs later
Final Adult Height
Time Frame: Up to at least 16 years of age for females and 18 years of age for males
Height at the age of 16 years for females and 18 years for males
Up to at least 16 years of age for females and 18 years of age for males

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
BioMarin Pharmaceutical

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Medical Director, MD, BioMarin Pharmaceutical

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 26, 2016

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
February 1, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 12, 2016

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 25, 2016

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 31, 2016

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 13, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 12, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 111-205
  • 2015-004004-30 (EudraCT Number)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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