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

August 13, 2025 updated by: Katmai Pharmaceuticals Inc.

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

  • 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.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

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).

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
52

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • United States
    • California
      • Los Angeles, California, United States, 90095
        • University of California, Los Angeles
    • Florida
      • Miami, Florida, United States, 33176
        • Miami Cancer Institute-Baptist Heath South Florida
    • Massachusetts
      • Boston, Massachusetts, United States, 02215
        • Dana Farber Cancer Institute
    • Michigan
      • Detroit, Michigan, United States, 48202
        • Henry Ford Health System
    • New York
      • New York, New York, United States, 10022
        • Memorial Sloan Kettering Cancer Center
    • Ohio
      • Cleveland, Ohio, United States, 44195
        • Cleveland Clinic Foundation
    • Tennessee
      • Nashville, Tennessee, United States, 37203
        • Sarah Cannon Research Institute (Tennessee Oncology)
    • Utah
      • Salt Lake City, Utah, United States, 84112
        • Huntsman Cancer Institute

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 99 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

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

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Dose Escalation (Part 1)
ERAS-801 will be orally administered to study participants with recurrent GBM in sequential ascending doses until unacceptable toxicity, disease progression, or withdrawal of consent.
Drug: ERAS-801
Administered orally
Experimental: Dose Expansion (Part 2)
ERAS-801 will be orally administered at the recommended dose (as determined from Part 1) to study participants with recurrent GBM harboring alterations in EGFR.
Drug: ERAS-801
Administered orally

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Adverse Events
Time Frame: Assessed up to 24 months from time of first dose
Incidence and severity of treatment-emergent AEs and serious AEs
Assessed up to 24 months from time of first dose
Dose Limiting Toxicities (DLT)
Time Frame: Study Day 1 up to Day 29
Based on adverse events observed during dose escalation
Study Day 1 up to Day 29
Maximum Tolerated Dose (MTD)
Time Frame: Study Day 1 up to Day 29
Based on adverse events observed during dose escalation
Study Day 1 up to Day 29
Recommended Dose (RD)
Time Frame: Study Day 1 up to Day 29
Based on adverse events observed during dose escalation
Study Day 1 up to Day 29

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Plasma concentration (Cmax)
Time Frame: Study Day 1 up to Day 29
Maximum plasma or serum concentration of ERAS-801
Study Day 1 up to Day 29
Time to achieve Cmax (Tmax)
Time Frame: Study Day 1 up to Day 29
Time to achieve maximum plasma or serum concentration of ERAS-801
Study Day 1 up to Day 29
Area under the curve
Time Frame: Study Day 1 up to Day 29
Area under the plasma concentration-time curve of ERAS-801
Study Day 1 up to Day 29
Half-life
Time Frame: Study Day 1 up to Day 29
Half-life of ERAS-801
Study Day 1 up to Day 29
Objective Response Rate (ORR)
Time Frame: Assessed up to 24 months from time of first dose
Based on assessment of radiographic imaging per modified RANO response assessment
Assessed up to 24 months from time of first dose
Duration of Response (DOR)
Time Frame: Assessed up to 24 months from time of first dose
Based on assessment of radiographic imaging per modified RANO response assessment
Assessed up to 24 months from time of first dose
Time to Response (TTR)
Time Frame: Assessed up to 24 months from time of first dose
Based on assessment of radiographic imaging per modified RANO response assessment
Assessed up to 24 months from time of first dose

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Katmai Pharmaceuticals Inc.

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Erasca, Inc.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Les Brail, Medical director

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
February 25, 2022

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 31, 2025

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
September 30, 2025

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
January 24, 2022

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 24, 2022

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
February 3, 2022

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
August 17, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 13, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • ERAS-801-01

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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