Recent Updates
Recently added Catalysts

BEAM-301

Phase 1

Glycogen Storage Disease Type Ia | Small molecule | Rare Disease |Beam Therapeutics Inc.|Trials Updated: Dec 15, 2025

BEAM-301 target and mechanism

Molecular targetR83C
Target classMutation
ModalitySmall molecule

Also known as BEAM-301: Single dose of BEAM-301 administered by IV

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment36

FDA Designations

No designations recorded

BEAM-301 clinical trials

BEAM-301 · 1 trial · 1 indication

Phase 1 1
NCT06735755A Phase 1/2, Dose-Exploration Study to Evaluate the Safety and Efficacy of BEAM-301 in Patients With Glycogen Storage Disease Type Ia (GSDIa)Glycogen Storage Disease Type Ia
RECRUITING36 Analytics
PHASE1RECRUITING
A Phase 1/2, Dose-Exploration Study to Evaluate the Safety and Efficacy of BEAM-301 in Patients With Glycogen Storage Disease Type Ia (GSDIa)
Glycogen Storage Disease Type IaUnlock trial analytics

Study Endpoints

Primary Endpoints

To evaluate the safety and tolerability of BEAM-301 in patients with GSDIa with a G6PC1 c.247C>T (p.R83C) variant by measuring incidence of treatment-emergent adverse events (TEAEs) including serious adverse events (SAEs) and dose-limiting toxicities (DL
BEAM-301 administration through month 24

Secondary Endpoints

Absolute and change from baseline in time to hypoglycemia or metabolic decompensation during a controlled fasting challenge
Baseline to month 24
Changes from baseline in starch supplementation dose
Baseline to month 24
Level of serum glucose and metabolic parameters (lipid profile and uric acid) over time
Baseline to month 24
Unlock Study Endpoints

Study Design & Arms

AllocationNA
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
BEAM-301EXPERIMENTALBEAM-301 consists of adenine base editor messenger ribonucleic acid (mRNA) and single guide ribonucleic acid (gRNA) formulated in lipid nanoparticles (LNPs) for intravenous (IV) administration.

Interventions

NameTypeDescription
BEAM-301: Single dose of BEAM-301 administered by IVDRUGBEAM-301 is designed to correct the G6PC1 c.247C\>T allele via an A:T-to-G:C base-pair substitution, resulting in restoration of G6Pase-α catalytic activity.
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites3

Inclusion Criteria: 1. Males or females age ≥18 years of age at the time of consent. 2. Diagnosis of GSDIa and homozygous or compound heterozygous for the G6PC1 c.247C\>T (p.R83C) variant (confirmed by genetic testing). 3. History of at least 1 episode of hypoglycemia \<60 mg/dL within the 2 years ...

Countries:United States
Unlock Eligibility Criteria

Frequently asked questions about BEAM-301

What is BEAM-301?

BEAM-301 is an investigational small molecule developed by Beam Therapeutics Inc. (ticker: BEAM) for the treatment of Glycogen Storage Disease Type Ia (GSDIa), a rare inherited metabolic disorder. It is being studied as a single dose administered by intravenous (IV) infusion and remains in clinical development.

What is BEAM-301 used for in Glycogen Storage Disease Type Ia?

BEAM-301 is being developed to treat Glycogen Storage Disease Type Ia (GSDIa), a rare disease caused by impaired glucose metabolism in the liver. The Phase 1/2 study enrolls adults 18 years and older with GSDIa in the United States. It is investigational and has not been approved for any use.

What does BEAM-301 target?

BEAM-301 targets the R83C mutation, a specific disease-causing mutation associated with Glycogen Storage Disease Type Ia. By addressing this mutation, the small molecule is designed to act on the underlying cause of GSDIa rather than only managing symptoms.

Who is developing BEAM-301?

BEAM-301 is being developed by Beam Therapeutics Inc., which trades on the Nasdaq under the ticker BEAM. The company is running the clinical program for the asset in Glycogen Storage Disease Type Ia.

What phase is BEAM-301 in?

BEAM-301 is in Phase 1 clinical development. It is investigational and has not been approved by the FDA or any other regulatory agency. The ongoing study is a Phase 1/2 dose-exploration trial evaluating safety and efficacy in patients with Glycogen Storage Disease Type Ia.

What clinical trials is BEAM-301 in?

BEAM-301 is being studied in NCT06735755, a Phase 1/2 dose-exploration study evaluating its safety and efficacy in patients with Glycogen Storage Disease Type Ia. The trial is currently recruiting, plans to enroll 36 participants, is uncontrolled, and is conducted in the United States with adults 18 years and older.

Is BEAM-301 the same as a single IV dose of BEAM-301?

Yes. BEAM-301 is also referred to as a single dose of BEAM-301 administered by IV. These names describe the same investigational small molecule from Beam Therapeutics being studied in Glycogen Storage Disease Type Ia, given as one intravenous dose rather than a repeated regimen.