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Advanced Solid TumorPhase 1/2NCT05580770

Mirdametinib + BGB-3245 in Advanced Solid Tumors

A Phase 1/2 study testing Mirdametinib 2mg, BGB-3245 5mg and Mirdametinib 3mg in people with Advanced Solid Tumor, run by SpringWorks Therapeutics, Inc., a healthcare company of Merck KGaA, Darmstadt, Germany at 8 sites in 2 countries.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

A Phase 1/2a open-label, multicenter, dose escalation and expansion study of mirdametinib in combination with BGB-3245 in adult participants with histologically confirmed, advanced (American Joint Committee on Cancer (AJCC) Stage III or IV) metastatic or unresectable solid cancer that is refractory to or has… Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Advanced Solid Tumor
What is being tested?
Mirdametinib 2mg, BGB-3245 5mg and Mirdametinib 3mg
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
23 participants
Where
8 sitesin 2 countries
Study dates
3 Feb 2023to 15 Jan 2025
Phase
Phase 1/2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Able to provide informed consent
  • At least 18 years of age on day of signing ICF
  • Advanced, metastatic or unresectable solid cancer that has not responded to or progressed during or after at least 1 line of appropriate therapy or for which there is no treatment available or prior therapy was not tolerated.
  • Part 1: oncogenic mutation or other genomic aberration of the MAPK pathway
  • Part 2: oncogenic mutation or genomic aberration defined below:
  • Cohort A: cutaneous melanoma harboring NRAS mutations.
Show all 12Show fewer
  • Cohort B: non-small cell lung cancer (NSCLC) harboring a KRAS mutation.
  • Cohort C: NSCLC or cutaneous melanoma harboring BRAF Class II or Class III mutations or BRAF Fusion mutation.
  • Must have archival tumor tissue or agree to a fresh tumor biopsy at screening
  • Measurable disease per RECIST 1.1
  • Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 2
  • Adequate organ function and no transfusion within 14 days of first dose

Who cannot join

  • Central Nervous System metastases, leptomeningeal carcinomatosis or untreated spinal cord compression
  • History of glaucoma
  • Active parathyroid disorder or history of malignancy associated hypercalcemia
  • Clinically significant cardiac disease within the past 6 months of signing ICF
  • History of toxicity from another RAF, MEK, ERK inhibitor requiring discontinuation of treatment from these agents
  • Severe or uncontrolled systemic disease
Show all 15Show fewer
  • Inability to swallow oral medications
  • Clinically significant active infection (HIV, Hepatitis B or Hepatitis C)
  • History of or ongoing Immune Thrombocytopenia (ITP), Von Willebrand disease and/or other past or present bleeding disorders
  • Underlying medical conditions in investigator's opinion to be unfavorable to be a part of the study
  • Major surgical procedure or significant traumatic injury within 4 weeks prior to first dose or anticipates need for major surgery while on study
  • Systemic anti-cancer therapy within 2 weeks or 5 half-lives before first dose
  • Concomitant systemic or glucocorticoid therapy within 2 weeks before first dose
  • Concomitant medicines that are strong CYP3A4 inhibitors or inducers within 2 weeks or 5 half-lives before first dose
  • Live vaccine within 4 weeks before first dose

Trial locations and contacts

8 sites in 2 countries.

8 sites in 2 countries

United States6 sites
  • Massachusetts General Hospital

    Boston, Massachusetts, 02114

  • University Hospitals Cleveland Medical Center

    Cleveland, Ohio, 44106

  • Texas Oncology-Baylor Charles A. Sammons Cancer Center

    Dallas, Texas, 75246

  • UC San Diego Moores Cancer Center

    La Jolla, California, 92093

  • Yale-New Haven Hospital-Yale Cancer Center

    New Haven, Connecticut, 06520

  • Hospital of the University of Pennsylvania

    Philadelphia, Pennsylvania, 19104

Other trials in United States

Australia2 sites
  • Peter MacCallum Cancer Centre

    Melbourne, Victoria, 3000

  • Calvary Mater Newcastle

    Waratah, 2298

Other trials in Australia

About this study

Official title: A Phase 1/2a Open-Label, Dose Escalation and Expansion Study to Investigate the Safety, Pharmacokinetics, Pharmacodynamics and Efficacy of Mirdametinib in Combination With BGB-3245 in Patients With Advanced Solid Tumors

A Phase 1/2a open-label, multicenter, dose escalation and expansion study of mirdametinib in combination with BGB-3245 in adult participants with histologically confirmed, advanced (American Joint Committee on Cancer (AJCC) Stage III or IV) metastatic or unresectable solid cancer that is refractory to or has progressed during or after at least 1 line of appropriate prior systemic anti-cancer therapy including chemotherapy, immunotherapy, or appropriate targeted therapy, or for which there is no treatment available, or prior standard of care therapy was not tolerated.

Read the detailed description

The study will be conducted in two sequential parts: Part 1 dose escalation (Phase 1) and Part 2 dose expansion (Phase 2a).

Participants will receive mirdametinib and brimarafenib administered by mouth every day on a continuous schedule. Mirdametinib will be dosed twice a day (BID) and brimarafenib will be dosed once a day (QD). One treatment cycle will be 28 days.

Part 1 of the study will assess the safety, tolerability, pharmacokinetics (PK), pharmacodynamics (PDx), and preliminary evidence of anti-tumor efficacy. Part 1 will also identify the MTD and the RP2D for the combination of mirdametinib with brimarafenib.

Part 2 will confirm the safety, tolerability, efficacy, PK, and PDx for the combination of mirdametinib and brimarafenib. It will follow a parallel design and include one or more dose expansion cohorts, where each participant would be treated with the combination of mirdametinib and brimarafenib at the RP2D. It will begin after the RP2D for the combination of mirdametinib and brimarafenib is identified in Part 1. Part 2 may start either in parallel with, or after, the conduct and analysis of the PDx Expansion Cohort in Part 1.

Participants who experience a TEAE requiring treatment modification will be managed according to the applicable guidelines in the protocol.

Being tested
Mirdametinib 2mg, BGB-3245 5mg, Mirdametinib 3mg, Mirdametinib 4mg, BGB-3245 10mg

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Mirdametinib 2mgDrug

    Also called PD-0325901

    Mirdametinib 2mg administered orally

  • BGB-3245 5mgDrug

    Also called Brimarafenib

    BGB-3245 5mg administered orally

  • Mirdametinib 3mgDrug

    Also called PD-0325901

    Mirdametinib 3mg administered orally

  • Mirdametinib 4mgDrug

    Also called PD-0325901

    Mirdametinib 4mg administered orally

  • BGB-3245 10mgDrug

    Also called Brimarafenib

    BGB-3245 10mg administered orally

  • BGB-3245 20mgDrug

    Also called Brimarafenib

    BGB-3245 20mg administered orally

Study groups in NCT05580770
Study groupRoleWhat they receive
Phase 1 Dose Escalation, Cohort 1ExperimentalParticipants with an oncogenic mutation or other genomic aberration of the MAPK pathway
Receives: Drug: Mirdametinib 2mg; Drug: BGB-3245 5mg
Phase 1 Dose Escalation, Cohort 2ExperimentalParticipants with an oncogenic mutation or other genomic aberration of the MAPK pathway
Receives: Drug: Mirdametinib 2mg; Drug: BGB-3245 10mg
Phase 1 Dose Escalation, Cohort 3ExperimentalParticipants with an oncogenic mutation or other genomic aberration of the MAPK pathway
Receives: Drug: Mirdametinib 2mg; Drug: BGB-3245 20mg
Phase 1 Dose Escalation, Cohort 4ExperimentalParticipants with an oncogenic mutation or other genomic aberration of the MAPK pathway
Receives: Drug: Mirdametinib 3mg; Drug: BGB-3245 10mg
Phase 1 Dose Escalation, Cohort 5ExperimentalParticipants with an oncogenic mutation or other genomic aberration of the MAPK pathway
Receives: Drug: Mirdametinib 4mg; Drug: BGB-3245 10mg

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Incidence of Treatment Emergent Adverse Events

    Safety and tolerability endpoint evaluation via incidence of treatment emergent Adverse Events (TEAEs). TEAE severities were graded according to National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE) v5.0. AEs were coded using MedDRA Version 27.1.

    Measured: All adverse events were collected from the time of signing ICF until 30 days after the last dose of study treatment (an average of 3.48 months and up to 16.76 months).

  2. Maximum Tolerated Dose (Part 1 Only)

    The maximum tolerated dose (MTD) for mirdametinib and BGB-3245 administered as a combination, if any, will be based on safety and tolerability during the first 28 days of treatment in Cycle 1.

    Measured: Up to 18 months

  3. Recommended Phase 2 Dose [RP2D] (Part 1 Only)

    The recommended phase 2 dose (RP2D) for mirdametinib and BGB-3245 administered as a combination will be determined based on safety, tolerability, PK, preliminary anti-tumor efficacy, and other available data.

    Measured: Up to 24 months

  4. Objective Response Rate (Part 2 Only)

    Preliminary anti-tumor efficacy for the RP2D of mirdametinib and BGB-3245 administered as a combination as assessed by Computed Tomography (CT) or Magnetic Resonance Imaging (MRI). Objective Response Rate (ORR) defined as the proportion of participants with complete response (CR) + partial response (PR) using Response Evaluation Criteria in Solid Tumors (RECIST v1.1).

    Measured: Up to 24 months

Secondary outcomes (3)
  1. Objective Response Rate (Part 1 Only)

    Preliminary anti-tumor efficacy of mirdametinib and BGB-3245 administered as a combination as assessed by CT or MRI. ORR defined as the proportion of participants with Complete Response (CR) + Partial Response (PR) using RECIST v1.1. Responses were as reported by the investigators.

    Measured: From participants' date of first dose of study treatment through end of treatment, an average of 3.5 months

  2. Duration of Response Rate

    Duration of response rate in participants treated with the combination of mirdametinib and BGB-3245, defined as the time from response (CR + PR using RECIST v1.1) to disease progression and/or death.

    Measured: Up to 36 months

  3. Change in Plasma Concentrations of Mirdametinib and BGB-3245

    To determine the PK of mirdametinib and BGB-3245 administered as a combination in the eligible participant population. Plasma concentrations of mirdametinib and BGB-3245 will be measured to evaluate systemic exposures (AUC, Cmax, Ctrough, and other PK parameters as data allow).

    Measured: Up to 24 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted14 Oct 2022
  2. Study start3 Feb 2023
  3. Primary completion15 Jan 2025
  4. Study completion15 Jan 2025

Why it stopped: Lack of tolerability of BGB-3245 (Brimarafenib) when given in combination with Mirdametinib

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1/2
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Sequential
Model description
The study will be conducted in two sequential parts: Part 1 dose escalation (Phase 1) and Part 2 dose expansion (Phase 2a).
Masking
None (open label)
Enrolment
23 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05580770
Sponsor's protocol ID
MEKRAF-AST-101
Status last verified
Aug 2026
First submitted
22 Sep 2022
Last updated
20 Aug 2026
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: IPD supporting publicly available results will be evaluated for sharing.

Questions about this trial

What is this clinical trial studying?

A Phase 1/2 study testing Mirdametinib 2mg, BGB-3245 5mg and Mirdametinib 3mg in people with Advanced Solid Tumor, run by SpringWorks Therapeutics, Inc., a healthcare company of Merck KGaA, Darmstadt, Germany at 8 sites in 2 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 12 inclusion and 15 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 20 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 8 sites in United States, Australia. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 1 May 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Incidence of Treatment Emergent Adverse Events (time frame: All adverse events were collected from the time of signing ICF until 30 days after the last dose of study treatment (an average of 3.48 months and up to 16.76 months).). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Aug 2026.

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