NCT07159841 · Crinetics Pharmaceuticals Inc.
A Study in Pediatric Participants With Congenital Adrenal Hyperplasia (Balance-CAH)
What this study is about
The purpose of this study is to evaluate the safety, effectiveness, how the drug moves through the body (PK), and how the drug affects the body (PD) of atumelnant treatment in pediatric participants with classic congenital adrenal hyperplasia (CAH).
View original scientific description
The purpose of this study is to evaluate the safety, efficacy, pharmacokinetics (PK), and pharmacodynamics (PD) of atumelnant treatment in pediatric participants with classic congenital adrenal hyperplasia (CAH).
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
- Part A and B participants are eligible to be included in the study only if all of the following criteria apply:
- Male or female at birth, between 1 to \<18 years of chronological age at the time of signing the Informed Consent Form (ICF).
- Have a medically confirmed diagnosis of classic CAH due to 21-hydroxylase deficiency (21-OHD) based on standard medically accepted criteria such as elevated 17-OHP level, confirmed CYP21A2 genetic testing, positive newborn screening with confirmatory second tier testing, or cosyntropin stimulation.
- Participants must have an elevated morning serum A4 level \>ULN during Screening obtained prior to morning glucocorticoid (GC) administration.
- Participants must be on a stable supraphysiologic GC replacement therapy for at least one month prior to Screening.
- Compliance, as judged per Investigator discretion, with GC replacement and mineralocorticoid replacement (if applicable) regimen documented during the Screening Period.
- Biochemical euthyroidism as determined by the Investigator. Part C inclusion criteria require participants to complete treatment in either Part A or Part B and in the Investigator's opinion it would benefit the participant to continue in Part C, regardless of age.
Exclusion criteria
- Part A and Part B: Individuals in Part A and Part B who meet any of the following criteria will be excluded from participation in this study:
- Diagnosis of any form of CAH other than classic 21-OHD.
- Participants treated with other GCs within 30 days of Screening.
- Stress dose of GC therapy within 2 weeks of start of Screening, defined as any dose above the normal maintenance dose, including but not limited to intravenous (IV) or intramuscular (IM) hydrocortisone.
- Use of growth hormones within 1 week of start of Screening for short acting, or within 6 weeks of start of Screening for long acting.
- Use of a corticotropin-releasing factor receptor antagonist within 14 days of Screening.
- History of cancer excluding cured/treated dermal squamous or basal cell carcinoma or cervical carcinoma in situ.
- Abnormal sleep/wake cycles (as determined by the Investigator).
- Female participants who are pregnant or lactating.
- Participants who have been dosed with an investigational drug (including atumelnant) in any prior clinical study within 60 days or 5 half-lives (whichever is longer) prior to the first dose.
- Individuals in Part C who do not meet the Part C Inclusion Criteria.
Where
- San Francisco, California
- Boston, Massachusetts
- Ann Arbor, Michigan
- Minneapolis, Minnesota
- New Brunswick, New Jersey
- Philadelphia, Pennsylvania
- Fort Worth, Texas
- Charlottesville, Virginia
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 Jul 6, 2026 · Source of record for eligibility and locations