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Gene therapy aims to free patients from daily steroids for rare adrenal disorder

NCT ID NCT04783181

Disease control Sponsor: Adrenas Therapeutics Inc Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This early-phase trial tests a gene therapy called BBP-631 for classic congenital adrenal hyperplasia (CAH), a genetic condition that forces patients to take daily steroids. The therapy uses a harmless virus to deliver a working copy of the faulty gene. Only 8 adults are enrolled to check safety and whether it can lower stress hormones and raise natural cortisol levels.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
BBP-631 (a gene therapy using a harmless virus to deliver a working copy of the CYP21A2 gene)
What this could lead to
If successful, this could reduce or eliminate the need for daily steroid medication in people with classic congenital adrenal hyperplasia.
What could go wrong
This is a very early, small trial (8 people) testing safety first. Gene therapy is complex and may not work as hoped, and there are risks like immune reactions or liver issues.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

About 8 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jul 2021

Expected to finish

Feb 2029

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Key Inclusion Criteria 1. Adult male and non-pregnant females with classic CAH (simple virilizing or salt-wasting) due to 21-OHD 2. Screening/baseline 17-OHP levels \> 5-10 × ULN and \< 40 × ULN (upper limit of normal) 3. Stable oral hydrocortisone (HC) regimen as the only glucocorticoid (GC) maintenance therapy 4. Naïve to prior gene therapy or AAV-mediated therapy Key Exclusion Criteria 1. Positive for anti-AAV5 (Adeno-Associated Virus Type 5) antibodies 2. History of adrenalectomy and/or significant liver disease

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Conditions

The condition(s) this trial relates to.

classic congenital adrenal hyperplasia due to 21-hydroxylase deficiency congenital adrenal hyperplasia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Congenital adrenal hyperplasia

Contacts and locations

Locations

  • Ann and Robert H. Lurie Children's Hospital of Chicago

    Chicago, Illinois, 60611, United States

  • Children's Hospital of Philadelphia

    Philadelphia, Pennsylvania, 19104, United States

  • Lucas Research, Inc.

    Morehead City, North Carolina, 28557, United States

  • National Institutes of Health Clinical Center

    Bethesda, Maryland, 20892-1932, United States

  • University of Minnesota

    Minneapolis, Minnesota, 55455, United States

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