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A Study to Evaluate ERAS-801 in Patients With Recurrent Glioblastoma (THUNDERBBOLT-1)

A Phase 1 Study to Evaluate the CNS-Penetrant EGFR/ERBB1 Inhibitor ERAS-801 in Patients With Recurrent Glioblastoma (THUNDERBBOLT-1)

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05222802
Enrollment
52
Registered
2022-02-03
Start date
2022-02-25
Completion date
2025-09-30
Last updated
2025-08-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Glioblastoma Multiforme

Keywords

GBM, EGFR, epidermal growth factor receptor, alteration, ERBB1

Brief summary

* To evaluate the safety and tolerability of escalating doses of ERAS-801 in study participants with recurrent glioblastoma multiforme (GBM). * To determine the Maximum Tolerated Dose (MTD) and/or Recommended Dose (RD) of ERAS-801. * To evaluate the antitumor activity of ERAS-801. * To evaluate the PK profile of ERAS-801.

Detailed description

This is a Phase 1, open-label, multicenter clinical study evaluating ERAS-801 as a monotherapy. The study will initially commence with dose escalation of ERAS-801 in study participants with recurrent GBM. Once the MTD and/or RD has been determined from dose escalation, then dose expansion of ERAS-801 may commence in study participants with recurrent GBM harboring alterations in epidermal growth factor receptor (EGFR).

Interventions

Administered orally

Sponsors

Erasca, Inc.
CollaboratorINDUSTRY
Katmai Pharmaceuticals Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 99 Years
Healthy volunteers
No

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 medication

Exclusion criteria

* Prior treatment with an EGFR inhibitor for Glioblastoma * Currently enrolled in another therapeutic study * History of clinically significant cardiovascular disease * Gastrointestinal conditions that may affect administration/absorption of oral medications * Have an active infection (bacterial, fungal, or viral) requiring systemic therapy * Pregnant or breastfeeding women * Any serious underlying medical or psychiatric condition or evidence of any other significant clinical disorder or laboratory finding that renders the patient inappropriate to participate in the study * Known allergies, hypersensitivity, or intolerance to ERAS-801 or its excipients

Design outcomes

Primary

MeasureTime frameDescription
Dose Limiting Toxicities (DLT)Study Day 1 up to Day 29Based on adverse events observed during dose escalation
Maximum Tolerated Dose (MTD)Study Day 1 up to Day 29Based on adverse events observed during dose escalation
Recommended Dose (RD)Study Day 1 up to Day 29Based on adverse events observed during dose escalation
Adverse EventsAssessed up to 24 months from time of first doseIncidence and severity of treatment-emergent AEs and serious AEs

Secondary

MeasureTime frameDescription
Objective Response Rate (ORR)Assessed up to 24 months from time of first doseBased on assessment of radiographic imaging per modified RANO response assessment
Plasma concentration (Cmax)Study Day 1 up to Day 29Maximum plasma or serum concentration of ERAS-801
Time to Response (TTR)Assessed up to 24 months from time of first doseBased on assessment of radiographic imaging per modified RANO response assessment
Duration of Response (DOR)Assessed up to 24 months from time of first doseBased on assessment of radiographic imaging per modified RANO response assessment
Time to achieve Cmax (Tmax)Study Day 1 up to Day 29Time to achieve maximum plasma or serum concentration of ERAS-801
Area under the curveStudy Day 1 up to Day 29Area under the plasma concentration-time curve of ERAS-801
Half-lifeStudy Day 1 up to Day 29Half-life of ERAS-801

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 6, 2026