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ERAS-801

Phase 1

Glioblastoma Multiforme | Small molecule | Oncology |Erasca, Inc.|Trials Updated: Aug 17, 2025

ERAS-801 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Feb 2022

ERAS-801 target and mechanism

Molecular targetEGFR
Target classProtein
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment52

FDA Designations

No designations recorded

ERAS-801 clinical trials

ERAS-801 · 1 trial · 1 indication

Phase 1 1
NCT05222802A Study to Evaluate ERAS-801 in Patients With Recurrent Glioblastoma (THUNDERBBOLT-1)Glioblastoma Multiforme
ACTIVE NOT_RECRUITING52 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Study to Evaluate ERAS-801 in Patients With Recurrent Glioblastoma (THUNDERBBOLT-1)
Glioblastoma MultiformeUnlock trial analytics

Study Endpoints

Primary Endpoints

Dose Limiting Toxicities (DLT)
Study Day 1 up to Day 29

Based on adverse events observed during dose escalation

Maximum Tolerated Dose (MTD)
Study Day 1 up to Day 29

Based on adverse events observed during dose escalation

Recommended Dose (RD)
Study Day 1 up to Day 29

Based on adverse events observed during dose escalation

Adverse Events
Assessed up to 24 months from time of first dose

Incidence and severity of treatment-emergent AEs and serious AEs

Secondary Endpoints

Plasma concentration (Cmax)
Study Day 1 up to Day 29
Time to achieve Cmax (Tmax)
Study Day 1 up to Day 29
Area under the curve
Study Day 1 up to Day 29
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose Escalation (Part 1)EXPERIMENTALERAS-801 will be orally administered to study participants with recurrent GBM in sequential ascending doses until unacceptable toxicity, disease progression, or withdrawal of consent.
Dose Expansion (Part 2)EXPERIMENTALERAS-801 will be orally administered at the recommended dose (as determined from Part 1) to study participants with recurrent GBM harboring alterations in EGFR.

Interventions

NameTypeDescription
ERAS-801DRUGAdministered orally
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Eligibility Criteria

Age Range18 Years to 99 Years
SexALL
Healthy VolunteersNo
Study Sites8

Inclusion Criteria: * Age ≥ 18 years * Willing and able to give written informed consent * Diagnosis of Glioblastoma, IDH WT as defined by the WHO 2021 criteria * Adequate organ function * Willing to comply with all protocol-required visits, assessments, and procedures * Able to swallow oral medica...

Countries:United States
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Frequently asked questions about ERAS-801

What is ERAS-801?

ERAS-801 is an investigational small molecule drug being developed by Erasca, Inc. for the treatment of glioblastoma multiforme, an aggressive form of brain cancer. It is currently in Phase 1 clinical development and has not been approved by the FDA. It is designed to target EGFR.

What is ERAS-801 used for in glioblastoma multiforme?

ERAS-801 is being studied for use in recurrent glioblastoma multiforme, a type of brain cancer. It is an investigational therapy in Phase 1 testing and is not yet approved for any indication. Its clinical program enrolls adults aged 18 years and older.

What does ERAS-801 target?

ERAS-801 targets EGFR, a protein receptor that is frequently altered in glioblastoma. By acting on this molecular target, the small molecule is intended to interfere with EGFR-driven signaling in tumor cells. EGFR is a validated oncology target across several cancer types.

Who is developing ERAS-801?

ERAS-801 is being developed by Erasca, Inc., a biopharmaceutical company that trades under the ticker symbol ERAS. Erasca is running the clinical program for the drug in recurrent glioblastoma multiforme, with the Phase 1 trial conducted in the United States.

What phase is ERAS-801 in?

ERAS-801 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA for glioblastoma multiforme or any other indication. The Phase 1 program is evaluating the drug in patients with recurrent glioblastoma.

What clinical trials is ERAS-801 in?

ERAS-801 is being evaluated in the Phase 1 THUNDERBBOLT-1 trial, registered as NCT05222802. The study is titled a study to evaluate ERAS-801 in patients with recurrent glioblastoma and is currently active but not recruiting. It plans to enroll 52 patients in the United States.