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BBP-631

Phase 1

Congenital Adrenal Hyperplasia | Gene therapy | Endocrine |BridgeBio Pharma, Inc.|Trials Updated: Dec 23, 2025

BBP-631 target and mechanism

ModalityGene therapy

Also known as AAV BBP-631

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment8

FDA Designations

No designations recorded

BBP-631 clinical trials

BBP-631 · 1 trial · 1 indication

Phase 1 1
NCT04783181A Study of Gene Therapy for Classic Congenital Adrenal Hyperplasia (CAH)Congenital Adrenal Hyperplasia
ACTIVE NOT_RECRUITING8 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Study of Gene Therapy for Classic Congenital Adrenal Hyperplasia (CAH)
Congenital Adrenal HyperplasiaUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of participants with Treatment-emergent Adverse Events that Led to Study Discontinuation
up to 5 years
To select the optimum dose or dose range of BBP 631 for future studies
up to 5 years

Secondary Endpoints

Change from Baseline in 17-OHP (hydroxyprogesterone) levels
Baseline, Week 52 and through study completion, an average of 5 years
Change from Baseline in androstenedione (A4) levels
Baseline, Week 52 and through study completion, an average of 5 years
Change from Baseline in endogenous cortisol levels
Baseline, Week 52 and through study completion, an average of 5 years
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose Level 1EXPERIMENTALBBP-631 lowest dose, administered once, intravenously (IV)
Dose Level 2EXPERIMENTALBBP-631 middle dose, administered once, IV
Dose Level 3EXPERIMENTALBBP-631, high dose, administered once, IV
Dose Level 4EXPERIMENTALBBP-631, highest dose, administered once, IV

Interventions

NameTypeDescription
AAV BBP-631BIOLOGICALintravenous
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites5

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) maint...

Countries:United States
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Frequently asked questions about BBP-631

What is BBP-631 used for?

BBP-631 is an investigational gene therapy being developed for classic congenital adrenal hyperplasia (CAH), an endocrine disorder. It is designed as a one-time treatment approach for adults with this condition. BBP-631 has not been approved by any regulatory agency and remains in clinical development.

Who makes BBP-631?

BBP-631 is developed by BridgeBio Pharma, Inc., which trades on the Nasdaq under the ticker BBIO. BridgeBio is a biopharmaceutical company focused on genetic diseases and has advanced BBP-631 into clinical testing for congenital adrenal hyperplasia.

What phase is BBP-631 in?

BBP-631 is in Phase 1 clinical development. The only trial to date is a Phase 1 study that is currently active but not recruiting. There are no completed trials for BBP-631, and the program remains investigational.

What clinical trials is BBP-631 in?

BBP-631 is being evaluated in a single Phase 1 trial, NCT04783181, titled A Study of Gene Therapy for Classic Congenital Adrenal Hyperplasia (CAH). The trial is active but not recruiting, enrolled 8 participants, and is conducted in the United States. It is controlled and includes adults 18 years and older.

Is BBP-631 the same as AAV BBP-631?

Yes, BBP-631 is also known as AAV BBP-631. The alternative name reflects its gene therapy modality, which uses an adeno-associated virus (AAV) vector. Both names refer to the same investigational product developed by BridgeBio Pharma for congenital adrenal hyperplasia.